CN112489557B - Electronic device - Google Patents
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- CN112489557B CN112489557B CN201910862053.7A CN201910862053A CN112489557B CN 112489557 B CN112489557 B CN 112489557B CN 201910862053 A CN201910862053 A CN 201910862053A CN 112489557 B CN112489557 B CN 112489557B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention discloses an electronic device which comprises a flexible display and a scroll. The flexible display comprises a driving substrate, a display layer and a front protective layer. The display layer is located on the driving substrate. The front protective layer covers the display layer. The end of the flexible display is fixed to the reel. The reel includes fixed slot, at least one storage tank and at least one flexible subassembly. The fixing groove is concavely arranged on the outer surface of the scroll, the end part of the flexible display is positioned in the fixing groove, the flexible display is also provided with a body part positioned outside the fixing groove, and the thickness of the end part is smaller than that of the body part. The containing groove is concavely arranged on the outer surface of the scroll. The flexible display device comprises a flexible display, a flexible component and a telescopic component, wherein the flexible display is arranged in the accommodating groove, and the telescopic component is pressed into the accommodating groove when the flexible display abuts against the flexible display, so that the stress of the flexible display can be reduced in the winding process.
Description
Technical Field
The invention relates to an electronic device.
Background
Flexible displays are lighter, thinner and more portable than conventional displays. For example, the flexible display can be carried by rolling the flexible display on a reel. The conventional method for fixing the flexible display to the reel is a tape fixing method. However, when the flexible display is wound, the step phenomenon is generated by the stacking structure of the flexible display and the adhesive tape, so that after the flexible display is wound for several turns, the stress is concentrated on part of the flexible display, which causes the display frame to be damaged, and even the circuit on the flexible display is damaged and fails due to the stress extrusion.
In addition, after the stack structure of the flexible display is wound for multiple times, the compressive stress and the tensile stress are respectively concentrated in the interior and the exterior of the flexible display, and the difference between the inner diameter perimeter and the outer diameter perimeter is generated after the flexible display is wound, so that the stack structure of the flexible display has a delamination problem, and particularly, the more serious film layer dislocation phenomenon is easy to occur at the tail end of the flexible display.
Disclosure of Invention
The invention aims to provide an electronic device, which can reduce stress in a winding process.
In one embodiment, an electronic device includes a flexible display and a reel. The flexible display comprises a driving substrate, a display layer and a front protective layer. The display layer is located on the driving substrate. The front protective layer covers the display layer. The end of the flexible display is fixed to the reel. The reel includes fixed slot, at least one storage tank and at least one flexible subassembly. The fixing groove is concavely arranged on the outer surface of the scroll, the end part of the flexible display is positioned in the fixing groove, the flexible display is also provided with a body part positioned outside the fixing groove, and the thickness of the end part is smaller than that of the body part. The containing groove is concavely arranged on the outer surface of the scroll. The telescopic component is arranged in the containing groove, and when the telescopic component abuts against the flexible display, the telescopic component is pressed into the containing groove.
In one embodiment, the fixing groove has an inner wall, and the reel has a rounded corner adjacent to the outer surface of the inner wall.
In an embodiment, the retractable assembly includes an elastic member and a movable member. The first end of the elastic piece is positioned on the bottom wall of the containing groove. The movable piece is located on a second end, far away from the first end, of the elastic piece and used for abutting against the flexible display.
In an embodiment, the movable member has an elastic surface facing away from the elastic member, and a rounded corner is formed at a connection between the elastic surface and a side wall of the movable member.
In an embodiment, the number of the telescopic assemblies is multiple, and the telescopic assemblies are symmetrically arranged relative to a circle center of the reel.
In one embodiment, an electronic device includes a flexible display, a reel and an adhesive layer. The flexible display includes a driving substrate, a display layer and a front passivation layer. The display layer is located on the driving substrate. The front protective layer covers the display layer. The length of the front protective layer is smaller than that of the driving substrate. The end of the flexible display is fixed to a reel, and the reel has at least one recess. The adhesive layer is positioned between the end part of the flexible display and the concave part of the scroll.
In one embodiment, the adhesive layer has a top surface and a bottom surface opposite to each other, and the top surface and the bottom surface of the adhesive layer contact the recess of the reel and the top surface of the driving substrate, respectively.
In an embodiment, the reel further includes at least one accommodating groove and at least one retractable assembly. The containing groove is concavely arranged on the outer surface of the scroll. The telescopic component is arranged in the accommodating groove and is adjacent to the concave part.
In an embodiment, the number of the telescopic assemblies is multiple, and the telescopic assemblies are symmetrically arranged relative to the center of the reel.
In an embodiment, the number of the concave portions is plural, and the concave portions are symmetrically arranged with respect to a center of the reel.
In an embodiment, the retractable assembly includes an elastic member and a movable member. The first end of the elastic piece is positioned on the bottom wall of the containing groove. The movable piece is located on a second end, far away from the first end, of the elastic piece and used for abutting against the flexible display.
In an embodiment, the movable member has an elastic surface facing away from the elastic member, and the elastic surface is used for abutting against the flexible display.
In one embodiment, an electronic device includes a flexible display and a reel. The flexible display comprises a driving substrate, a display layer and a front protective layer. The display layer is located on the driving substrate. The front protective layer covers the display layer. The end of the flexible display is fixed to the reel. The reel includes a fixing groove and at least one recess. The fixed groove is concavely arranged on the outer surface of the scroll, the end part of the flexible display is positioned in the fixed groove, the flexible display is also provided with a body part positioned outside the fixed groove, the length of the front protective layer is less than that of the driving substrate, and the fixed groove is positioned in the concave part.
In an embodiment, the number of the concave portions is plural, and the concave portions are symmetrically arranged with respect to a center of the reel.
In an embodiment, a thickness of the end portion of the flexible display is smaller than a thickness of the main body.
In view of the above, in the electronic device according to an embodiment of the invention, the reel having the fixing groove or the adhesive layer is used, so that stress concentration at the end portion of the flexible display can be reduced, and since the thickness of the end portion is smaller than the thickness of the main body portion, a difference in circumferential length between an inner diameter and an outer diameter of the flexible display after the flexible display is wound by the reel is reduced, thereby reducing stress concentration at the end portion of the flexible display, and achieving an advantage of avoiding a film layer of the flexible display from being misaligned. Moreover, when the flexible display is wound, the flexible display is collapsed towards the circle center direction of the scroll through the telescopic assembly, so that stress concentration of the flexible display in the winding process can be avoided, and the problem of dislocation of a film layer of the flexible display is also avoided.
Drawings
Various embodiments of the invention can be understood by reading the following detailed description in conjunction with the accompanying drawings. It is noted that the various features of the drawings are not to scale in accordance with standard practice in the industry. In fact, the dimensions of the features described may be arbitrarily increased or decreased for clarity of discussion.
Fig. 1A is a cross-sectional view of an electronic device according to an embodiment of the invention.
Fig. 1B is an enlarged schematic view of the region R of fig. 1A.
Fig. 2A is a cross-sectional view of an electronic device according to another embodiment of the invention.
Fig. 2B is a cross-sectional view of an electronic device according to another embodiment of the invention.
Fig. 3 is a cross-sectional view of an electronic device according to another embodiment of the invention.
Description of the main reference numerals:
10. 20, 30, 40-electronic device, 100 flexible display, 102 scroll, 102a outer surface, 102B-fillet, 102R-concave portion, 104-driving substrate, 104 a-top surface, 106-display layer, 108-front protection layer, 110-rear protection layer, 112-glue layer, 114-glue layer, 116-fixing groove, 116 a-inner wall, 118-containing groove, 118 a-bottom wall, 120-expansion component, 122-elastic component, 122 a-first end, 122B-second end, 124-movable component, 124 a-elastic surface, 124B-side wall, 124C-fillet, 126-adhesion layer, 126 a-top surface, 126B-bottom surface, 216-fixing groove, 220-expansion component, 222-elastic component, 224-movable component, B-body portion, C-center of circle, E-end portion, R-region, S-distance, T1, T2-thickness.
Detailed Description
In the following description, numerous implementation details are set forth in order to provide a thorough understanding of various embodiments of the invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.
Fig. 1A is a cross-sectional view of an electronic device 10 according to an embodiment of the invention. Fig. 1B is an enlarged schematic view of the region R of fig. 1A. Please refer to fig. 1A and fig. 1B simultaneously. The electronic device 10 includes a flexible display 100 and a reel 102. The flexible display 100 has a main body B and an end E, and the end E of the flexible display 100 is fixed to the reel 102. The reel 102 is used for winding or unwinding the flexible display 100. The flexible display 100 includes a driving substrate 104, a display layer 106, a front passivation layer 108 and a rear passivation layer 110. The display layer 106 is disposed on the driving substrate 104, and the front protection layer 108 covers the display layer 106 and is attached to the top surface 104a of the driving substrate 104 through the adhesive layer 112. The rear passivation layer 110 is disposed on the bottom surface of the driving substrate 104 and attached to the driving substrate 104 by a glue layer 114. The front protective layer 108 and the rear protective layer 110 can be used to prevent moisture and ultraviolet rays from entering the display layer 106 and the driving substrate 104. In this embodiment, the material of the front protection layer 108 may include an organic material.
The driving substrate 104 is, for example, an active device array substrate, but the invention is not limited thereto. Specifically, the driving substrate 104 is a thin film driving substrate made of a flexible plastic or metal material, for example, so that the electronic device 10 is thinner and more portable. In this embodiment, the display layer 106 may be an electrophoretic display layer.
In this embodiment, spool 102 includes a retaining groove 116. The fixing groove 116 is recessed in the outer surface 102a of the roller 102 and is used for fixing the flexible display 100 on the roller 102. The end E of the flexible display 100 is located in the fixing groove 116. In the embodiment, the thickness T1 of the end portion E of the flexible display 100 is smaller than the thickness of the body portion B (e.g., the minimum thickness T2 of the body portion B) (see fig. 1B), the length of the front protection layer 108 is smaller than the length of the driving substrate 104, and the front protection layer 108 does not extend to the end portion E of the flexible display 100, in other words, the front protection layer 108 is located outside the fixing groove 116 of the reel 102, so that the circumferential length difference between the inner diameter and the outer diameter of the flexible display 100 wound by the reel 102 is reduced, thereby reducing the stress concentration on the end portion E of the flexible display 100 and avoiding the problem of film layer dislocation of the flexible display 100.
In addition, the reel 102 further has a receiving slot 118 and a retractable assembly 120. The receiving groove 118 is recessed in the outer surface 102a of the spool 102, and the receiving groove 118 closest to the fixing groove 116 is spaced apart from the fixing groove 116 by a distance S. The retractable assembly 120 is disposed in the receiving cavity 118, and when the reel 102 starts to wind the flexible display 100, the retractable assembly 120 may contact the flexible display 100. In the embodiment, when the retractable assembly 120 abuts against the flexible display 100, the retractable assembly 120 can be pressed into the receiving groove 118. When the flexible display 100 is wound, the retractable assembly 120 collapses toward the center C of the reel 102, so as to avoid stress concentration of the flexible display 100 during the winding process and avoid the problem of film misalignment of the flexible display 100.
In the present embodiment, the retractable assembly 120 includes an elastic element 122 and a movable element 124, and the elastic element 122 is located between the movable element 124 and a center C of the spool 102. The first end 122a of the elastic member 122 is located on the bottom wall 118a of the receiving groove 118. The movable member 124 is located on a second end 122b of the elastic member 122 away from the first end 122a, and is configured to abut against the flexible display 100. During the process that the flexible display 100 is wound by the spool 102, the movable element 124 may abut against the flexible display 100, so that the movable element 124 is pressed into the receiving groove 118, that is, the movable element 124 moves toward the center C of the spool 102, and the elastic element 122 is compressed toward the center C of the spool 102. In other words, the elastic member 122 is elastically deformed, and the elastic member 122 and the movable member 124 can be collapsed and absorb the stress generated during the winding process of the flexible display 100. In the embodiment, the elastic member 122 may be a spring, but the invention is not limited thereto, and other elastic materials that can be stretched can also be used as the elastic member 122.
In the present embodiment, the movable element 124 has an elastic surface 124a facing away from the elastic element 122, so that the outer surface of the movable element 124 has elasticity, thereby further improving the collapsing effect of the telescopic assembly 120. In addition, a rounded-corner (round-corner) 124c is formed at the connection between the elastic surface 124a and the side wall 124b of the movable member 124, so as to prevent the end portion E of the flexible display 100 from being broken due to bending.
The retaining groove 116 has an inner wall 116a and the spool 102 has a rounded corner 102b adjacent the outer surface 102a of the inner wall 116 a. When the flexible display 100 is bent, the end E of the flexible display 100 contacting the rounded corner 102b can be uniformly stressed, thereby avoiding the risk of breaking the end E of the flexible display 100 due to excessive stress concentration.
In one embodiment, the number of the telescopic assemblies 120 is plural, and the telescopic assemblies 120 are symmetrically arranged with respect to the center C of the reel 102. Therefore, the stress concentration on the flexible display 100 can be further reduced during the winding process.
Fig. 2A shows a cross-sectional view of the electronic device 20 according to an embodiment of the invention. Referring to fig. 2A, the electronic device 20 includes a flexible display 100, a reel 102 and an adhesive layer 126. The adhesive layer 126 is located between the end E of the flexible display 100 and the reel 102 to fix the flexible display 100 on the reel 102.
In the embodiment, the reel 102 has at least one recess 102r, and the adhesive layer 126 is located between the end E of the flexible display 100 and the recess 102r of the reel 102, so that the stress concentration on the end E of the flexible display 100 during winding can be reduced. The adhesive layer 126 has opposite top and bottom surfaces 126a and 126b, with the top surface 126a of the adhesive layer 126 contacting the recess 102r of the spool 102. In this way, even if the coiled flexible display 100 generates stress due to the difference in circumference between the inner diameter and the outer diameter, the stress is not concentrated on the fixing position of the reel 102 of the flexible display 100. In other words, the stress concentration on the end portion E of the flexible display 100 can be reduced, and the risk of film misalignment of the flexible display 100 can also be reduced. In this embodiment, since the thickness T1 of the end portion E of the flexible display 100 is smaller than the thickness of the main body portion B (e.g., the minimum thickness T2 of the main body portion B), the length of the front protection layer 108 is smaller than the length of the driving substrate 104, and the front protection layer 108 does not extend to the end portion E of the flexible display 100, as in the end portion E, a difference between a circumference of an inner diameter and a circumference of an outer diameter of the flexible display 100 after the flexible display 100 is wound by the winding shaft 102 is reduced, so that stress concentration on the end portion E of the flexible display 100 is reduced, and a problem of film layer misalignment of the flexible display 100 is avoided.
When the reel 102 starts to wind the flexible display 100, the recess 102r contacts the flexible display 100, so that stress concentration on the flexible display 100 can be avoided, and stress concentration on the end E of the flexible display 100 can be reduced. In an embodiment, the number of the concave portions 102r is multiple, and the concave portions 102r are symmetrically arranged with respect to the center C of the winding shaft 102, so that the stress concentration on the flexible display 100 can be further reduced during the winding process.
Fig. 2B is a cross-sectional view of an electronic device 30 according to another embodiment of the invention. The electronic device 30 of the present embodiment is different from the electronic device 20 of fig. 2A in that: spool 102 also includes a retraction assembly 220. Retraction assembly 220 is similar to retraction assembly 120 of FIG. 1A. The retractable assembly 220 includes an elastic element 222 and a movable element 224, the elastic element 222 is located between the movable element 224 and the center C of the spool 102, and the movable element 224 has an elastic surface 224a facing away from the elastic element 222, so that the movable element 224 has an elastic capability to further improve the collapsing effect of the retractable assembly 220. The remaining details of the retraction assembly 220 are not described herein. In the embodiment, the telescopic assembly 220 is adjacent to the recess 102r, and the telescopic assembly 220 may contact the flexible display 100 when the flexible display 100 is wound by the reel 102. When the retractable assembly 220 abuts against the flexible display 100, the retractable assembly 220 is pressed into the receiving groove 218, and the elastic member 222 is elastically deformed, so that the elastic member 222 and the movable member 224 can collapse and absorb the stress generated during the winding process of the flexible display 100.
In one embodiment, the number of the telescopic assemblies 220 is plural, and the telescopic assemblies 220 are symmetrically arranged with respect to the center C of the reel 102. The number of the recesses 102r is plural, and the recesses 102r are arranged symmetrically with respect to the center C of the spool 102. For example, the recess 102r and the retractable element 220 are spaced apart. During the process of winding the flexible display 100 on the reel 102, the retractable assembly 220 may contact the flexible display 100 first. When the retractable assembly 220 abuts against the flexible display 100, the retractable assembly 220 is pressed into the receiving groove 118, and the elastic member 222 is elastically deformed, so that the elastic member 222 and the movable member 224 can collapse and absorb the stress generated during the winding process of the flexible display 100. Then, the concave portion 102r abuts against the flexible display 100, so that stress concentration on the flexible display 100 can be avoided, and a risk of film misalignment of the flexible display 100 caused by stress can be effectively reduced.
Fig. 3 shows a cross-sectional view of an electronic device 40 according to another embodiment of the invention. The electronic device 40 of the present embodiment is different from the electronic device 20 of fig. 2A in that: the electronic device 40 may have the adhesive layer 126 or omit the adhesive layer 126, and the spool 102 includes the fixing groove 216. The securing slots 216 are similar to the securing slots 116 of FIG. 1A, and thus, details of the securing slots 216 are not described herein. In the embodiment, the fixing groove 216 is located in the recess 102r, so that, during the winding process, stress concentration on the end portion E of the flexible display 100 can be avoided, and a risk of misalignment of the film layer of the flexible display 100 can also be avoided.
In summary, in the electronic device according to the embodiment of the invention, the reel having the fixing groove is used, so that the stress concentration on the end portion of the flexible display can be reduced, and since the thickness of the end portion of the flexible display is smaller than the thickness of the main body portion, the difference between the inner diameter and the outer diameter of the flexible display after being wound by the reel is reduced, thereby reducing the stress concentration on the end portion of the flexible display and also avoiding the film layer of the flexible display from being misaligned. The scroll is also provided with a telescopic component arranged in the containing groove, and when the telescopic component is abutted against the flexible display, the telescopic component is pressed into the containing groove. By using the scroll with the telescopic assembly, when the flexible display is wound, the telescopic assembly collapses towards the circle center direction of the scroll, so that stress concentration of the flexible display in the winding process can be avoided, and the problem of film layer dislocation of the flexible display is also avoided. The telescopic assembly further comprises a movable piece and an elastic piece. The movable part is provided with an elastic surface back to the elastic element, and a fillet guide is formed at the joint of the elastic surface and one side wall of the movable part, so that the end part of the flexible display positioned in the fixed groove can be prevented from being broken due to bending. The outer surface of the reel adjacent to the inner wall has a rounded corner. When the flexible display is bent, the flexible display contacting the rounded guide corner can be uniformly stressed, thereby avoiding the risk of breaking the flexible display due to the excessive concentration of stress on the end of the flexible display.
Although the present invention has been described with reference to the above embodiments, 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 (13)
1. An electronic device, comprising:
a flexible display, the flexible display comprising:
a drive substrate;
a display layer on the driving substrate; and
a front protective layer covering the display layer, and
a reel to which an end of the flexible display is fixed, the reel including:
a fixing groove concavely arranged on the outer surface of the scroll, wherein the end part of the flexible display is positioned in the fixing groove, the flexible display is also provided with a body part positioned outside the fixing groove, and the thickness of the end part is smaller than that of the body part;
the accommodating groove is concavely arranged on the outer surface of the scroll; and
at least one flexible assembly disposed in the receiving cavity, wherein when the flexible assembly abuts against the flexible display, the flexible assembly is pressed into the receiving cavity, and the flexible assembly includes:
the first end of the elastic piece is positioned on the bottom wall of the accommodating groove; and
and the movable piece is positioned on the second end of the elastic piece far away from the first end and is used for abutting against the flexible display.
2. The electronic device of claim 1, wherein the retaining groove has an inner wall and the spool has a rounded corner adjacent the outer surface of the inner wall.
3. The electronic device according to claim 2, wherein the movable member has an elastic surface facing away from the elastic member, and a rounded corner is formed at a connection of the elastic surface and a side wall of the movable member.
4. The electronic device according to claim 1, wherein the number of the telescopic assemblies is plural, and the plurality of telescopic assemblies are arranged symmetrically with respect to a center of the reel.
5. An electronic device, comprising:
a flexible display, the flexible display comprising:
a drive substrate;
a display layer on the driving substrate; and
the front protective layer covers the display layer, and the length of the front protective layer is smaller than that of the driving substrate;
a reel, an end of the flexible display being fixed to the reel, wherein the reel has at least one recess, the reel further comprises at least one retractable assembly and at least one accommodating groove, the accommodating groove is recessed in an outer surface of the reel, when the retractable assembly abuts against the flexible display, the retractable assembly is pressed into the accommodating groove, the retractable assembly comprises:
the first end of the elastic piece is positioned on the bottom wall of the accommodating groove; and
the movable piece is positioned on a second end, far away from the first end, of the elastic piece and used for abutting against the flexible display; and
an adhesive layer between the end of the flexible display and the recess of the spool.
6. The electronic device of claim 5, wherein the adhesive layer has opposing top and bottom surfaces, the top and bottom surfaces of the adhesive layer contacting the recess of the reel and a top surface of the drive substrate, respectively.
7. The electronic device of claim 5, wherein the retraction assembly is adjacent to the recess.
8. The electronic device of claim 5, wherein the number of the telescopic assemblies is multiple, and the plurality of telescopic assemblies are arranged symmetrically with respect to the center of the reel.
9. The electronic device according to claim 5, wherein the number of the recesses is plural, and the plural recesses are arranged symmetrically with respect to a center of the reel.
10. The electronic device according to claim 5, wherein the movable member has an elastic surface facing away from the elastic member, and the elastic surface is configured to abut against the flexible display.
11. An electronic device, comprising:
a flexible display, the flexible display comprising:
a drive substrate;
a display layer on the driving substrate; and
a front protective layer covering the display layer, and
a reel to which an end of the flexible display is fixed, the reel including:
a fixing groove concavely arranged on the outer surface of the scroll, wherein the end part of the flexible display is positioned in the fixing groove, the flexible display is also provided with a body part positioned outside the fixing groove, and the length of the front protective layer is less than that of the driving substrate; and
a plurality of recesses, wherein the fixing groove is located in a first one of the plurality of recesses, the plurality of recesses are recessed in an outer surface of the reel, and the first one of the plurality of recesses contacts the flexible display when the reel starts to wind the flexible display.
12. The electronic device of claim 11, wherein the plurality of recesses are arranged symmetrically with respect to a center of the spool.
13. The electronic device of claim 11, wherein a thickness of the end portion of the flexible display is less than a thickness of the body portion.
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| CN101008760A (en) * | 2006-01-23 | 2007-08-01 | 精工爱普生株式会社 | Electrophoretic display sheet, electrophoretic display device, and electronic apparatus |
| TW201227639A (en) * | 2010-12-29 | 2012-07-01 | Ind Tech Res Inst | Flexible display apparatus and fabrication method of flexible display apparatus |
| CN108877530A (en) * | 2018-04-30 | 2018-11-23 | 友达光电股份有限公司 | Flexible display |
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