CN113345321A - Flexible display - Google Patents

Flexible display Download PDF

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Publication number
CN113345321A
CN113345321A CN202010135901.7A CN202010135901A CN113345321A CN 113345321 A CN113345321 A CN 113345321A CN 202010135901 A CN202010135901 A CN 202010135901A CN 113345321 A CN113345321 A CN 113345321A
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China
Prior art keywords
flexible
circuit board
substrate
display
area
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CN202010135901.7A
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Chinese (zh)
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陈谚宗
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Hannstar Display Nanjing Corp
Hannstar Display Corp
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Hannstar Display Nanjing Corp
Hannstar Display Corp
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Priority to CN202010135901.7A priority Critical patent/CN113345321A/en
Publication of CN113345321A publication Critical patent/CN113345321A/en
Pending legal-status Critical Current

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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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention discloses a flexible display, which comprises a first flexible substrate, a first display area, a first substrate binding area and a first flexible circuit board. The first flexible substrate has a first outer surface and a first inner surface opposite to the first outer surface. The first display area is located on the first outer surface of the first flexible substrate. The first substrate binding region is located on a first outer surface of the first flexible substrate, wherein the first substrate binding region has a first center line. The first flexible circuit board is positioned on the first outer surface of the first flexible substrate and is connected with the first flexible substrate through the first substrate binding area; a first distance is arranged between a lower boundary of the first display area and the first central line, a second distance is arranged between a lower boundary of the first flexible substrate and the first central line, and the second distance is equal to or larger than the first distance.

Description

Flexible display
Technical Field
The present invention relates to a flexible display, and more particularly, to a flexible display with improved support of a substrate bonding region.
Background
Recently, the types of displays are more and more diversified, wherein flexible displays have become one of the major development lines in the market. Generally, a flexible display device may include a flexible substrate, and a display region, a substrate bonding region and a flexible circuit board disposed on the flexible substrate, wherein the flexible circuit board is connected to the flexible substrate through the substrate bonding region. However, since the conventional flexible printed circuit board has a drooping portion that hangs down beyond the lower boundary of the flexible substrate, the drooping portion may cause the flexible printed circuit board to be separated from the substrate bonding region due to the gravity effect, so that the flexible printed circuit board cannot be effectively electrically connected to the flexible substrate, thereby causing the damage of the flexible display. Therefore, there is still a need to develop a flexible display that can improve the above disadvantages.
Disclosure of Invention
The invention relates to a flexible display. According to the invention, the distance between the lower boundary of the first flexible substrate and the first central line of the first substrate binding area is equal to or greater than the distance between the lower boundary of the first display area and the first central line of the first substrate binding area, and the part of the first flexible circuit board beyond the lower boundary of the first flexible substrate is not too large, namely, the first flexible substrate can provide larger supporting force for the first flexible circuit board, so that the first flexible circuit board can be prevented from being separated from the first substrate binding area, and the physical and electrical connection among the first flexible circuit board, the first substrate binding area and the first flexible substrate can be ensured, so that the flexible display can be prevented from being damaged.
According to an aspect of the present invention, a flexible display is provided. The flexible display comprises a first flexible substrate, a first display area, a first substrate binding area and a first flexible circuit board. The first flexible substrate has a first outer surface and a first inner surface opposite to the first outer surface. The first display area is located on the first outer surface of the first flexible substrate. The first substrate binding region is located on a first outer surface of the first flexible substrate, wherein the first substrate binding region has a first center line. The first flexible circuit board is positioned on the first outer surface of the first flexible substrate and is connected with the first flexible substrate through the first substrate binding area; a first distance is arranged between a lower boundary of the first display area and the first central line, a second distance is arranged between a lower boundary of the first flexible substrate and the first central line, and the second distance is equal to or larger than the first distance.
In order to better appreciate the above and other aspects of the present invention, the following detailed description of the embodiments is provided in conjunction with the accompanying drawings.
Drawings
FIG. 1A is a schematic top view of a flexible display according to an embodiment of the invention.
Fig. 1B is a bottom view of a flexible display according to an embodiment of the invention.
FIG. 1C is a cross-sectional view of a flexible display according to an embodiment of the invention.
FIG. 2A is a schematic top view of a flexible display according to another embodiment of the invention.
Fig. 2B is a bottom view of a flexible display according to another embodiment of the invention.
FIG. 2C is a cross-sectional view of a flexible display according to another embodiment of the invention.
FIG. 3A is a schematic top view of a flexible display according to another embodiment of the invention.
Fig. 3B is a bottom view of a flexible display according to another embodiment of the invention.
FIG. 3C is a cross-sectional view of a flexible display according to another embodiment of the invention.
FIG. 4A is a schematic top view of a flexible display according to another embodiment of the invention.
Fig. 4B is a bottom view of a flexible display according to another embodiment of the invention.
FIG. 4C is a cross-sectional view of a flexible display according to another embodiment of the invention.
FIG. 5A is a schematic top view of a flexible display according to another embodiment of the invention.
Fig. 5B is a bottom view of a flexible display according to another embodiment of the invention.
FIG. 6A is a schematic top view of a flexible display according to another embodiment of the invention.
FIG. 6B is a cross-sectional view of a flexible display according to another embodiment of the invention.
FIG. 6C is a schematic top view of a flexible display according to another embodiment of the invention.
FIG. 7A is a partial top view of a flexible display according to an embodiment of the invention.
Fig. 7B is a partial bottom view of the first flexible substrate according to an embodiment of the invention.
FIG. 8A is a perspective view of a flexible display according to another embodiment of the invention.
FIG. 8B is a perspective view of a flexible display according to another embodiment of the invention.
FIG. 9A is a schematic diagram illustrating an application of a flexible display according to another embodiment of the invention.
FIG. 9B is a schematic diagram illustrating an application of a flexible display according to another embodiment of the invention.
FIG. 10A is an exploded view of a flexible display according to an embodiment of the invention.
FIG. 10B is an exploded view of a flexible display according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the drawings are simplified to illustrate only some embodiments, but not all embodiments, of the invention, and that elements and combinations relating to the invention are shown only to provide a clear description of the basic structure or method of operation of the invention, which may be more complex in actual implementation and arrangement. In addition, for convenience of explanation, the detailed proportions of the elements shown in the various drawings of the present invention can be adjusted according to design requirements.
Fig. 1A is a top view of a flexible display 10 according to an embodiment of the invention. Fig. 1B shows a bottom view of the flexible display 10 according to an embodiment of the invention. FIG. 1C is a cross-sectional view of the flexible display 10 according to one embodiment of the invention.
Please refer to fig. 1A, 1B and 1C. In the present embodiment, the flexible display 10 is a double-sided flexible display. However, the invention is not limited thereto, and the flexible display may be a single-sided flexible display, for example, including only the first flexible substrate 110 or the second flexible substrate 120. Further, the flexible display 10 includes a first flexible substrate 110, a first display area AA1, a first chip 115, a first substrate bonding area BA1, a first flexible circuit board 113, a second flexible substrate 120, a second display area AA2, a second chip 125, a second substrate bonding area BA2, and a second flexible circuit board 123. In the present embodiment, the first flexible substrate 110 is exemplarily illustrated as a substrate extending along a first direction (e.g., an X-axis direction) and a second direction (e.g., a Y-axis direction), the second flexible substrate 120 is illustrated as a substrate extending along a first direction (e.g., an X-axis direction) and a second direction (e.g., a Y-axis direction), and the first flexible substrate 110 is stacked above the second flexible substrate 120 along a third direction (e.g., a Z-axis direction), but the present invention is not limited thereto and can be adjusted according to the use requirement of the observer. The first direction (e.g., the X-axis direction), the second direction (e.g., the Y-axis direction), and the third direction (e.g., the Z-axis direction) may be staggered with respect to each other.
The first flexible substrate 110 has a first outer surface 110a and a first inner surface 110b opposite to the first outer surface 110 a. The first display area AA1 is located on the first outer surface 110a of the first flexible substrate 110. The first substrate bonding area BA1 is located on the first outer surface 110a of the first flexible substrate 110, wherein the first substrate bonding area BA1 has a first center line L1. The first wafer 115 is disposed on the first outer surface 110a of the first flexible substrate 110 and is disposed between the first display area AA1 and the first substrate bonding area BA 1. The first flexible wiring board 113 is located on the first outer surface 110a of the first flexible substrate 110, and is connected to the first flexible substrate 110 through the first substrate bonding area BA 1. In other words, the first substrate bonding area BA1 is disposed between the first flexible printed circuit board 113 and the first flexible substrate 110, and the first substrate bonding area BA1 is physically and electrically connected to the first flexible printed circuit board 113 and the first flexible substrate 110. The first flexible substrate 110 has an upper boundary 110U and a lower boundary 110L, the first flexible circuit board 113 protrudes from the lower boundary 110L of the first flexible substrate 110, and the second substrate 120 protrudes from the upper boundary 110U of the first flexible substrate 110.
The second flexible substrate 120 has a second outer surface 120a and a second inner surface 120b opposite to the second outer surface 120a, wherein the second inner surface 120b is attached to the first inner surface 110b, so that the first outer surface 110a and the second outer surface 120a are disposed away from each other. The second display area AA2 is located on the second outer surface 120a of the second flexible substrate 120. The second substrate bonding area BA2 is located on the second outer surface 120a of the second flexible substrate 120, wherein the second substrate bonding area BA2 has a second center line L2. The second wafer 125 is disposed on the second outer surface 120a of the second flexible substrate 120 and is disposed between the second display area AA2 and the second substrate bonding area BA 2. The second flexible wiring board 123 is located on the second outer surface 120a of the second flexible substrate 120, and is connected to the second flexible substrate 120 through the second substrate bonding area BA 2. In other words, the second substrate bonding area BA2 is disposed between the second flexible circuit board 123 and the second flexible substrate 120, and the second substrate bonding area BA2 is physically and electrically connected to the second flexible circuit board 123 and the second flexible substrate 120. The second flexible substrate 120 has an upper boundary 120U and a lower boundary 120L, the second flexible circuit board 123 protrudes from the lower boundary 120L of the second flexible substrate 120, and the first substrate 110 protrudes from the upper boundary 120U of the second flexible substrate 120.
In some embodiments, a lower boundary AA1L of the first display area AA1 and the first central line L1Has a first distance D therebetween1A lower boundary 110L and a first center line L of the first flexible substrate 1101Has a second distance D therebetween2And a second distance D2Is equal to or greater than the first distance D1. Compared with the second distance D2Less than the first distance D1In other words, the first flexible circuit board 110 according to an embodiment of the invention can provide a better supporting force for the first flexible circuit board 113 (i.e., the portion of the first flexible circuit board 113 protruding from the first flexible circuit board 110 is smaller), so that the risk of the first flexible circuit board 113 separating from the first substrate bonding area BA1 can be reduced.
In some embodiments, a lower boundary AA2L of the second display area AA2 and the second central line L2Has a third distance D therebetween3A lower boundary 120L of the second flexible substrate 120 andsecond center line L2Has a fourth distance D therebetween4And a fourth distance D4Is equal to or greater than the third distance D3. Compared with the fourth distance D4Less than a third distance D3In other words, the second flexible circuit board 120 according to an embodiment of the invention can provide better supporting force for the second flexible circuit board 123 (i.e., the portion of the second flexible circuit board 123 protruding from the second flexible circuit board 120 is smaller), so that the risk of the second flexible circuit board 123 separating from the second substrate bonding area BA2 can be reduced.
In some embodiments, an adhesive layer TL is disposed between the first flexible substrate 110 and the second flexible substrate 120, and the adhesive layer TL includes a material capable of being repeatedly adhered.
In some embodiments, the first display area AA1 has an upper boundary AA1U, and the upper boundary AA1U of the first display area AA1 is opposite to the lower boundary AA1L of the first display area AA 1. The second display region has an upper boundary AA2U, an upper boundary AA2U of the second display region AA2 is opposite to a lower boundary AA2L of the second display region AA2, wherein the upper boundary AA1U of the first display region AA1 corresponds to the lower boundary AA2L of the second display region AA2, and the lower boundary AA1L of the first display region AA1 corresponds to the upper boundary AA2U of the second display region AA2 (as shown in fig. 1C). That is, the lower boundary AA2L of the second display area AA2 is closer to the upper boundary AA1U of the first display area AA1 than to the upper boundary AA 2U; the lower boundary AA2L of the second display area AA2 is farther from the lower boundary AA1L of the first display area AA1 than the upper boundary AA 2U.
In some embodiments, the first flexible wiring board 113 and the second flexible wiring board 123 may be disposed on two opposite sides (e.g., disposed on the upper side and the lower side, respectively) of the flexible display 10. The first flexible wiring board 113 and the second flexible wiring board 123 may be offset from each other in a third direction (for example, a Z-axis direction).
In some embodiments, the first die 115 and the second die 125 may be disposed on the first flexible circuit board 113 and the second flexible circuit board 123, respectively.
In some embodiments, the material of the first flexible substrate 110 or the second flexible substrate 120 may be formed of any suitable flexible material, such as Polyimide (PI), Polycarbonate (PC), polyethylene terephthalate (PET), or other suitable materials.
Fig. 2A is a top view of a flexible display 20 according to another embodiment of the invention. Fig. 2B shows a bottom view of the flexible display 20 according to another embodiment of the invention. FIG. 2C is a cross-sectional view of the flexible display 20 according to another embodiment of the invention. The flexible display 20 has a similar structure to the flexible display 10, except that the relative orientation of the second flexible substrate 220 to the first flexible substrate 110 is different, the description of the other same parts will not be repeated, and the same or/and similar elements are given the same or/and similar reference numerals.
Please refer to fig. 2A-2C. In the present embodiment, the flexible display 20 is a double-sided flexible display. However, the invention is not limited thereto, and the flexible display may be a single-sided flexible display, for example, including only the first flexible substrate 110 or the second flexible substrate 220. Further, the flexible display 20 includes a first flexible substrate 110, a first display area AA1, a first chip 115, a first substrate bonding area BA1, a first flexible circuit board 113, a second flexible substrate 220, a second chip 225, a second display area AA2, a second substrate bonding area BA2, and a second flexible circuit board 223.
The second flexible substrate 220 has a second outer surface 220a and a second inner surface 220b opposite to the second outer surface 220a, wherein the second inner surface 220b is attached to the first inner surface 110b, so that the first outer surface 110a and the second outer surface 120a are disposed away from each other. The second display area AA2 is located on the second outer surface 220a of the second flexible substrate 220. The second substrate bonding area BA2 is located on the second outer surface 220a of the second flexible substrate 220, wherein the second substrate bonding area BA2 has a second center line L2. The second wafer 225 is disposed on the second outer surface 220a of the second flexible substrate 220 and is disposed between the second display area AA2 and the second substrate bonding area BA 2. The second flexible wiring board 223 is located on the second outer surface 220a of the second flexible substrate 220 and is connected to the second flexible substrate 220 through the second substrate bonding area BA 2. In other words, the second substrate bonding area BA2 is disposed between the second flexible printed circuit board 223 and the second flexible printed circuit board 223The second substrate bonding area BA2 is physically and electrically connected between the second flexible printed circuit board 223 and the second flexible printed circuit board 220.
The first flexible substrate 110 has an upper boundary 110U and a lower boundary 110L; the second flexible substrate 220 has an upper boundary 220U and a lower boundary 220L. The first flexible wiring board 113 protrudes from the lower boundary 110L of the first flexible substrate 110. The second flexible wiring board 223 protrudes from the lower boundary 220L of the second flexible substrate 220. In the embodiment, the lower boundary 110L of the first flexible substrate 110 may be aligned with the lower boundary 220L of the second flexible substrate 220 along a third direction (e.g., a Z-axis direction), and the upper boundary 110U of the first flexible substrate 110 may be aligned with the upper boundary 220U of the second flexible substrate 220 along the third direction (e.g., a Z-axis direction), which is not limited by the invention.
In some embodiments, a lower boundary AA2L of the second display area AA2 and the second central line L2Has a third distance D therebetween3A lower boundary 220L and a second center line L of the second flexible substrate 2202Has a fourth distance D therebetween4And a fourth distance D4Is equal to or greater than the third distance D3. Compared with the fourth distance D4Less than a third distance D3In other words, the second flexible printed circuit 220 according to an embodiment of the invention can provide better supporting force for the second flexible printed circuit 223, and can reduce the risk of the second flexible printed circuit 223 separating from the second substrate bonding area BA 2.
In some embodiments, an adhesive layer TL is disposed between the first flexible substrate 110 and the second flexible substrate 220, and the adhesive layer TL includes a material that can be repeatedly adhered, so that there are more diversified styles in use, and the time for repairing and repairing problems is saved.
In some embodiments, the first display area AA1 has an upper boundary AA1U, the upper boundary AA1U of the first display area AA1 is opposite to the lower boundary AA1L of the first display area AA1, the second display area AA2 has an upper boundary AA2U, the upper boundary AA2U of the second display area AA2 is opposite to the lower boundary AA2L of the second display area AA2, wherein the upper boundary AA1U of the first display area corresponds to the upper boundary AA2U of the second display area AA2, and the lower boundary AA1L of the first display area AA1 corresponds to the lower boundary AA2L of the second display area AA2 (as shown in fig. 2C). That is, the lower boundary AA2L of the second display area AA2 is closer to the lower boundary AA1L of the first display area AA1 than the upper boundary AA 2U; the lower boundary AA2L of the second display area AA2 is farther from the upper boundary AA1U of the first display area AA1 than the upper boundary AA 2U.
In some embodiments, the first flexible wiring board 113 and the second flexible wiring board 223 may be disposed on the same side (e.g., both disposed on the lower side) of the flexible display 20. The first flexible wiring board 113 and the second flexible wiring board 223 have a projective overlapping relationship in a third direction (for example, a Z-axis direction).
Fig. 3A is a top view of a flexible display 30 according to another embodiment of the invention. Fig. 3B shows a bottom view of the flexible display 30 according to another embodiment of the invention. FIG. 3C is a cross-sectional view of a flexible display 30 according to another embodiment of the invention.
Please refer to fig. 3A-3C. In the present embodiment, the flexible display 30 is a double-sided flexible display. Further, the flexible display 30 includes a first flexible substrate 210, a first display area AA1, a first chip 215, a first substrate bonding area BA1, a first flexible circuit board 213, a second flexible substrate 320, a second display area AA2, a second chip 315, a second substrate bonding area BA2, and a second flexible circuit board 323.
The first flexible substrate 210 has a first outer surface 210a and a first inner surface 210b opposite to the first outer surface 210 a. The first display area AA1 is located on the first outer surface 210a of the first flexible substrate 210. The first flexible wiring board 213 is located on the first outer surface 210a of the first flexible substrate 210, and is connected to the first flexible substrate 210 through the first substrate bonding area BA 1. The first flexible substrate 210 has an upper boundary 210U and a lower boundary 210L opposite to the upper boundary 210U, and the first flexible circuit board 213 protrudes from the lower boundary 210L of the first flexible substrate 210.
The second flexible substrate 320 has a second outer surface 320a and a second inner surface 320b opposite to the second outer surface 320a, wherein the second inner surface 320b is attached to the first inner surface 210b, so that the first outer surface 210a and the second outer surface 320a are disposed away from each other. The second display area AA2 is located on the second outer surface 320a of the second flexible substrate 320. The second substrate bonding area BA2 is located on the second outer surface 320a of the second flexible substrate 320. The second flexible wiring board 323 is located on the second outer surface 320a of the second flexible substrate 320, and is connected to the second flexible substrate 320 through the second substrate bonding area BA 2. In other words, the second substrate bonding area BA2 is disposed between the second flexible printed circuit 323 and the second flexible substrate 320, and the second substrate bonding area BA2 is physically and electrically connected to the second flexible printed circuit 323 and the second flexible substrate 320. The second flexible substrate 320 has an upper boundary 320U and a lower boundary 320L opposite to the upper boundary 320U, and the second flexible circuit board 323 protrudes from the lower boundary 320L of the second flexible substrate 320.
In some embodiments, the upper boundary 210U of the first flexible substrate 210 is aligned with the lower boundary 320L of the second flexible substrate 320 along a third direction (e.g., Z-axis direction), and the lower boundary 210L of the first flexible substrate 210 is aligned with the upper boundary 320U of the second flexible substrate 320 along the third direction (e.g., Z-axis direction), which is not limited by the disclosure.
In some embodiments, the first display area AA1 has an upper boundary AA1U and a lower boundary AA1L opposite to the upper boundary AA 1U. The second display area AA2 has an upper boundary AA2U and a lower boundary AA2L opposite to the upper boundary AA 2U. A fifth distance D is formed between the upper boundary 210U of the first flexible substrate 210 and the upper boundary AA1U of the first display area AA15A sixth distance D is formed between the upper boundary 320U of the second flexible substrate 320 and the upper boundary AA2U of the second display area AA26And a fifth distance D5Is equal to the sixth distance D6. In some embodiments, the fifth distance D5May be greater than the third distance D3(the lower boundary AA2L of the second display area AA2 and the second center line L of the second substrate bonding area BA22Distance therebetween), and a fifth distance D5Not exceeding a third distance D32 times of the total weight of the composition; a sixth distance D6Greater than the first distance D1(the lower boundary AA1L of the first display area AA1 and the first center line L of the first substrate bonding area BA11Distance therebetween), and a sixth distance D6Not exceeding the first distance D12 times of the total weight of the powder. Compared with the fifth distance D5Less than a third distance D3Or a sixth distance D6Less than the first distance D1In other words, the area between the upper boundary 210U of the first flexible substrate 210 and the upper boundary AA1U of the first display area AA1 may be larger, which may increase the supporting force of the second flexible circuit board 323 and reduce the risk of the second flexible circuit board 323 separating from the second substrate bonding area BA2, or the area between the upper boundary 320U of the second flexible substrate 320 and the upper boundary AA2U of the second display area AA2 may be larger, which may increase the supporting force of the first flexible circuit board 213 and reduce the risk of the first flexible circuit board 213 separating from the first substrate bonding area BA 1.
In some embodiments, the first flexible substrate 210 and the second flexible substrate 320 may be respectively a unitary structure.
Fig. 4A shows a top view of a flexible display 40 according to another embodiment of the invention. Fig. 4B shows a bottom view of the flexible display 40 according to another embodiment of the invention. FIG. 4C is a cross-sectional view of a flexible display 40 according to another embodiment of the invention.
Please refer to fig. 4A-4C. In the present embodiment, the flexible display 40 is a double-sided flexible display. Further, the flexible display 40 includes a first flexible substrate 330, a first display area AA1, a first chip 315, a first substrate bonding area BA1, a first flexible circuit board 313, a second flexible substrate 420, a second display area AA2, a second chip 425, a second substrate bonding area BA2, and a second flexible circuit board 423.
The first flexible substrate 310 has a first outer surface 310a and a first inner surface 310b opposite to the first outer surface 310 a. The first display area AA1 is located on the first outer surface 310a of the first flexible substrate 310. The first flexible wiring board 313 is located on the first outer surface 310a of the first flexible substrate 310 and is connected to the first flexible substrate 310 through the first substrate bonding area BA 1. The first flexible substrate 310 has an upper boundary 310U and a lower boundary 310L opposite to the upper boundary 310U, and the first flexible circuit board 313 protrudes from the lower boundary 310L of the first flexible substrate 310.
The second flexible substrate 420 has a second outer surface 420a and a second inner surface 420b opposite to the second outer surface 420a, wherein the second inner surface 420b is attached to the first inner surface 310b, such that the first outer surface 310a and the second outer surface 420a are disposed away from each other. The second display area AA2 is located on the second outer surface 420a of the second flexible substrate 420. The second substrate bonding area BA2 is located on the second outer surface 420a of the second flexible substrate 420. The second flexible wiring board 423 is located on the second outer surface 420a of the second flexible substrate 420, and is connected to the second flexible substrate 420 through the second substrate bonding area BA 2. In other words, the second substrate bonding area BA2 is disposed between the second flexible circuit board 423 and the second flexible substrate 420, and the second substrate bonding area BA2 is physically and electrically connected to the second flexible circuit board 423 and the second flexible substrate 420. The second flexible substrate 420 has an upper boundary 420U and a lower boundary 420L opposite to the upper boundary 420U, and the second flexible circuit board 423 protrudes from the lower boundary 420L of the second flexible substrate 420.
In some embodiments, the first flexible substrate 310 includes a first body portion 311 and a first extension portion 312, the first extension portion 312 is connected to the first body portion 311, and the first extension portion 312 at least partially overlaps the second substrate binding area BA2 in a projection (for example, along the Z-axis direction). The second flexible substrate 420 includes a second body portion 421 and a second extending portion 422, the second extending portion 422 is connected to the second body portion 421, and at least a portion of the second extending portion 422 is projected to overlap the first substrate binding area BA1 (for example, along the Z-axis direction). In some embodiments, the first body portion 311 and a first extension portion 312 overlap each other in a third direction (e.g., a Z-axis direction). In some embodiments, the first body portion 311 and the first extension portion 312 do not overlap with each other in the third direction (e.g., the Z-axis direction).
In some embodiments, the first display area AA1 has an upper boundary AA1U and a lower boundary AA1L opposite to the upper boundary AA 1U. The second display area AA2 has an upper boundary AA2U and a lower boundary AA2L opposite to the upper boundary AA 2U. A fifth distance D is formed between the upper boundary 310U of the first flexible substrate 310 and the upper boundary AA1U of the first display area AA15Upper side of the second flexible substrate 420The boundary 420U has a sixth distance D from the upper boundary AA2U of the second display area AA26And a fifth distance D5Is equal to the sixth distance D6. And a fifth distance D5Not exceeding a third distance D3(the lower boundary AA2L of the second display area AA2 and the second center line L of the second substrate bonding area BA22Distance therebetween) of the two-dimensional image; a sixth distance D6Not exceeding the first distance D1(the lower boundary AA1L of the first display area AA1 and the first center line L of the first substrate bonding area BA11Distance between) of the two.
Compared to the first flexible substrate without the extension portion and/or the second flexible substrate without the extension portion, the first extension portion 312 of the present invention can provide better supporting force for the second flexible circuit board 423, so as to reduce the risk of the second flexible circuit board 423 separating from the second substrate bonding area BA2, and the second extension portion 422 can provide better supporting force for the first flexible circuit board 313, so as to reduce the risk of the first flexible circuit board 313 separating from the first substrate bonding area BA 1.
Fig. 5A shows a top view of a flexible display 40 according to another embodiment of the invention. Fig. 5B shows a bottom view of the flexible display 50 according to another embodiment of the invention.
Please refer to fig. 5A and 5B. In the present embodiment, the flexible display 50 is a double-sided flexible display. Further, the flexible display 50 includes a first flexible substrate 410, a first display area AA1, a first chip 415, a first substrate bonding area BA1, a first flexible circuit board 413, a second flexible substrate 520, a second display area AA2, a second chip 515, a second substrate bonding area BA2, and a second flexible circuit board 523.
The first flexible substrate 410 has a first outer surface 410a and a first inner surface (not labeled) opposite to the first outer surface 410 a. The first display area AA1 is located at the first outer surface 410a of the first flexible substrate 410. The first flexible wiring board 413 is located on the first outer surface 410a of the first flexible substrate 410 and is connected to the first flexible substrate 410 through the first substrate bonding area BA 1. The first flexible substrate 410 has an upper boundary 410U and a lower boundary 410L opposite to the upper boundary 410U, and the first flexible circuit board 413 protrudes from the lower boundary 410L of the first flexible substrate 410.
In some embodiments, the first die 415 is disposed on the first outer surface 410a, the first die 415 has an upper boundary 415U and a lower boundary 415L, the first substrate bonding area BA1 has an upper boundary BA1U and a lower boundary BA1L, wherein a seventh distance D is provided between the upper boundary 415U of the first die 415 and the lower boundary AA1L of the first display area AA1AAnd an eighth distance D is formed between the lower boundary 415L of the first wafer 415 and the upper boundary BA1U of the first substrate bonding area BA1BA seventh distance DAGreater than eighth distance DB。
The second flexible substrate 520 has a second outer surface 520a and a second inner surface (not labeled) opposite to the second outer surface 520a, wherein the second inner surface is attached to the first inner surface (not labeled) such that the first outer surface 410a and the second outer surface 520a are disposed away from each other. The second display area AA2 is located on the second outer surface 520a of the second flexible substrate 520. The second substrate bonding area BA2 is located on the second outer surface 520a of the second flexible substrate 520. The second flexible printed circuit board 523 is disposed on the second outer surface 520a of the second flexible substrate 520 and connected to the second flexible substrate 520 through the second substrate bonding area BA 2. In other words, the second substrate bonding area BA2 is disposed between the second flexible printed circuit board 523 and the second flexible printed circuit board 520, and the second substrate bonding area BA2 is physically and electrically connected to the second flexible printed circuit board 523 and the second flexible printed circuit board 520. The second flexible substrate 520 has an upper boundary 520U and a lower boundary 520L opposite to the upper boundary 520U, and the second flexible circuit board 523 protrudes from the lower boundary 520L of the second flexible substrate 520.
In some embodiments, the second wafer 515 is disposed on the second outer surface 520a, the second wafer 515 has an upper boundary 515U and a lower boundary 515L, the second substrate bonding area BA2 has an upper boundary BA2U and a lower boundary BA2L, wherein a distance D is formed between the upper boundary 515U of the second wafer 515 and the lower boundary AA2L of the second display area AA2CAnd a distance D is formed between the lower boundary 515L of the second wafer 515 and the upper boundary BA2U of the second substrate bonding area BA2DDistance DCGreater than the distance DD。
Compared to the seventh distance being less than the eighth distance, since the first chip 415 and the first substrate bonding area BA1 of the embodiment of the invention can be farther away from the first display area AA1, when the first flexible substrate 410 is curled or bent, the influence of stress on the first flexible circuit board 413 can be reduced, and the risk of the first flexible circuit board 413 separating from the first substrate bonding area BA1 can be reduced.
FIG. 6A is a schematic top view of a flexible display 60A according to another embodiment of the invention. FIG. 6B is a cross-sectional view of a flexible display 60A according to yet another embodiment of the invention.
Referring to fig. 6A to 6B, the flexible display 60A may be a double-sided flexible display or a single-sided flexible display. Further, the flexible display 60A includes a first flexible substrate 510, a first display area AA1, a first chip 515, a first substrate bonding area BA1, and a first flexible circuit board 513.
The first flexible substrate 510 has a first outer surface 510a and a first inner surface (not labeled) opposite to the first outer surface 510 a. The first display area AA1 is located at the first outer surface 510a of the first flexible substrate 510. The first flexible wiring board 513 is located on the first outer surface 510a of the first flexible substrate 510, and is connected to the first flexible substrate 510 through the first substrate bonding area BA 1. The first wafer 515 is located on the first outer surface 510a of the first flexible substrate 510, and is located between the first display area AA1 and the first flexible wiring board 513.
The first flexible substrate 510 has an upper boundary 510U and a lower boundary 510L opposite to the upper boundary 510U. The first display area AA1 has an upper boundary AA1U and a lower boundary AA1L opposite to the upper boundary AA 1U. The first flexible wiring board 513 has an upper boundary 513U and a lower boundary 513L opposite to the upper boundary 513U. In the present embodiment, a distance between the lower boundary 513L of the first flexible wiring board 513 and the lower boundary AA1L of the first display area AA1 may be equal to a distance between the lower boundary 510L of the first flexible substrate 510 and the lower boundary AA1L of the first display area AA 1. That is, the lower boundary 513L of the first flexible wiring board 513 may be aligned with the lower boundary 510L of the first flexible substrate 510 along the third direction (e.g., the Z-axis direction). However, the invention is not limited thereto, and the lower boundary 513L of the first flexible printed circuit 513 may not be aligned with the lower boundary 510L of the first flexible substrate 510 along the third direction (for example, the Z-axis direction).
FIG. 6C is a top view of a flexible display 60B according to yet another embodiment of the invention.
Referring to fig. 6C, the flexible display 60B may be a dual-sided flexible display or a single-sided flexible display. Further, the flexible display 60B includes a first flexible substrate 610, a first display area AA1, a first chip 615, a first substrate bonding area BA1, and a first flexible circuit board 613.
The first flexible substrate 610 has a first outer surface 610a and a first inner surface (not labeled) opposite to the first outer surface 610 a. The first display area AA1 is located on the first outer surface 610a of the first flexible substrate 610. The first flexible wiring board 613 is disposed on the first outer surface 610a of the first flexible substrate 610 and connected to the first flexible substrate 610 through the first substrate bonding area BA 1. The first die 615 is located on the first flexible wiring board 613. In other words, the first chip 615 overlaps the first flexible wiring board 613 in the third direction (e.g., the X-axis direction).
The first flexible substrate 610 has an upper boundary 610U and a lower boundary 610L opposite to the upper boundary 610U. The first display area AA1 has an upper boundary AA1U and a lower boundary AA1L opposite to the upper boundary AA 1U. The first flexible circuit board 613 has an upper boundary 613U and a lower boundary 613L opposite to the upper boundary 613U. In the present embodiment, a distance between the lower boundary 613L of the first flexible wiring board 613 and the lower boundary AA1L of the first display area AA1 may be equal to a distance between the lower boundary 610L of the first flexible substrate 610 and the lower boundary AA1L of the first display area AA 1. That is, the lower boundary 613L of the first flexible wiring board 613 may be aligned with the lower boundary 610L of the first flexible substrate 610 in a third direction (e.g., a Z-axis direction). However, the invention is not limited thereto, and the lower boundary 613L of the first flexible printed circuit board 613 may not be aligned with the lower boundary 610L of the first flexible substrate 610 along a third direction (for example, the Z-axis direction).
Fig. 7A is a partial top view of a flexible display according to an embodiment of the invention, particularly illustrating a position diagram of the first substrate bonding area BA 1. The first substrate bonding area BA1 on the first flexible substrate 110 is illustrated in the embodiment, but the invention is not limited thereto, and can be applied to the first substrate bonding area BA1 of the first flexible substrate or the second substrate bonding area BA2 of the second flexible substrate in any embodiment according to the requirement.
Referring to fig. 7A, the first substrate bonding area BA1 has a lower boundary BA1L, and a distance D between the lower boundary BA1L of the first substrate bonding area BA1 and the lower boundary BA1L of the first flexible substrate BA1EMay be greater than 0.3mm or less than or equal to 9 mm. The first substrate bonding area BA1 is, for example, an outer lead bonding area, and includes a plurality of outer leads.
Fig. 7B illustrates a partial bottom view of the first flexible substrate 110' according to an embodiment of the invention.
Referring to fig. 7B, the first flexible substrate 110' includes a first body portion 111 and a first extending portion 112, the first extending portion 112 is connected to the first body portion 111, the first body portion 111 has a lower boundary 111L, the first extending portion 112 has a lower boundary 112L, and a ninth distance D is formed between the lower boundary 112L of the first extending portion 112 and a lower boundary AA1L of the first display area AA1GAnd a tenth distance D is formed between the lower boundary 111L of the first body part 111 and the lower boundary AA1L of the first display area AA1FA ninth distance DGGreater than a tenth distance DF。
In some embodiments, the first extension portion 112 may partially overlap the first flexible printed circuit 113 in a third direction (e.g., a Z-axis direction). The first flexible circuit board 113 has a first width W in the second direction (e.g., X-axis direction)1The first extension portion 112 has a second width W in the second direction (e.g. X-axis direction)2Second width W2May be greater than the first width W1. In the present embodiment, the second width W of the first extension portion 112 in the second direction (for example, the X-axis direction)2May be the same as the width of the first body portion 111 in the second direction (for example, the X-axis direction), but the invention is not limited thereto.
Compared to the structure without the extension portion, the first extension portion 112 of the present embodiment can provide better supporting force for the first flexible circuit board 113, and the risk of the first flexible circuit board 113 separating from the first substrate bonding area BA1 can be reduced.
Fig. 8A is a perspective view of a flexible display 10' according to another embodiment of the invention. The flexible display 10' is similar to the flexible display 10 shown in fig. 1A to 1C, except that it further includes a first flexible printed circuit board 117 and a second flexible printed circuit board 127, wherein the same or similar elements are represented by the same or similar reference numerals, and the other repetition points will not be described in detail. For convenience of understanding, the first flexible substrate 110 and the second flexible substrate 120 are illustrated as being separated from each other, but in reality, the first flexible substrate 110 and the second flexible substrate 120 may be attached to each other (as shown in fig. 1C).
Referring to fig. 8A, the flexible display 10' further includes a first flexible printed circuit board 117 and a second flexible printed circuit board 127, the first flexible printed circuit board 117 is connected to the first inner surface 110b of the first flexible substrate 110, and the second flexible printed circuit board 127 is connected to the second inner surface 120b of the second flexible substrate 120. The first flexible printed circuit board 117 has a first circuit board binding area BB1 thereon, the first flexible circuit board 113 is electrically connected to the first flexible printed circuit board 117 through the first circuit board binding area BB1, and at least a portion of the projection of the first flexible printed circuit board 117 overlaps the first flexible substrate 110, the first flexible circuit board 113 and the first substrate binding area BA 1. The second flexible printed circuit board 127 has a second circuit board binding area BB2, the second flexible printed circuit board 123 is connected to the second flexible printed circuit board 127 through the second circuit board binding area BB2, and at least a portion of the projection of the second flexible printed circuit board 127 overlaps the second flexible substrate 120, the second flexible printed circuit board 123 and the second substrate binding area BA 2.
Compared to the case where the first flexible printed circuit board does not overlap the first substrate bonding area and the second flexible printed circuit board does not overlap the second substrate bonding area, since the first flexible printed circuit board 117 overlaps the first substrate bonding area BA1 and the second flexible printed circuit board 127 overlaps the second substrate bonding area BA2, the first flexible printed circuit board 117 and the second flexible printed circuit board 127 can provide better supporting force for the first flexible printed circuit board 113 and the second flexible printed circuit board 123, and the risk that the first flexible printed circuit board 113 and the second flexible printed circuit board 123 are separated from the first substrate bonding area BA1 and the second substrate bonding area BA2 can be reduced.
Fig. 8B is a perspective view of a flexible display 20' according to another embodiment of the invention. The flexible display 20 'is similar to the flexible display 20 shown in fig. 2A to 2C, except that it further includes a first flexible printed circuit board 217, and the first flexible printed circuit board 113 and the second flexible printed circuit board 223' have different lengths, wherein the same or similar elements are represented by the same or similar reference numerals, and the other repeated points will not be described in detail. For convenience of understanding, the first flexible substrate 110 and the second flexible substrate 220 are illustrated as being separated from each other, but in reality, the first flexible substrate 110 and the second flexible substrate 220 may be attached to each other (as shown in fig. 2C).
Referring to fig. 8B, the flexible display 20' further includes a first flexible printed circuit board 217, wherein the first flexible printed circuit board 217 is connected to the first inner surface 110B of the first flexible substrate 110 and the second inner surface 220B of the second flexible substrate 220. The first flexible printed circuit board 217 has a first circuit board binding region BB1 and a second circuit board binding region BB2, the first flexible circuit board 113 and the second flexible circuit board 223' are connected to the first flexible printed circuit board 217 through the first circuit board binding region BB1 and the second circuit board binding region BB2, respectively, and at least a part of the projection of the first flexible printed circuit board 217 overlaps the first flexible substrate 110, the first substrate binding region BA1, the second flexible substrate 220 and the second substrate binding region BA 2.
In some embodiments, the length L of the first flexible wiring board 113AIs not equal to the length L of the second flexible circuit board 223B. For example, the length L of the second flexible wiring board 223BIs longer than the length L of the first flexible circuit board 113AHowever, the invention is not limited thereto.
Compared with the case that the first flexible printed circuit board is not overlapped with the first substrate bonding area and the second substrate bonding area, since the first flexible printed circuit board 217 is overlapped with the first substrate bonding area BA1 and the second substrate bonding area BA2, the first flexible printed circuit board 217 can provide better supporting force for the first flexible circuit board 113 and the second flexible circuit board 223 ', and the risk that the first flexible circuit board 113 and the second flexible circuit board 223' are separated from the first substrate bonding area BA1 and the second substrate bonding area BA2 can be reduced.
FIG. 9A is a schematic diagram showing an application of a flexible display 10I according to another embodiment of the invention. The flexible display 10I can be applied to the flexible display 10 shown in fig. 1A to 1C, the flexible display 10' shown in fig. 8A, and other suitable flexible displays.
Referring to fig. 9A, the first flexible substrate 110 and the second flexible substrate 120 of the flexible display 10I can be bonded by the bonding layer TL, and the bonding layer TL includes a material capable of being repeatedly bonded, so that the first flexible substrate 110 and the second flexible substrate 120 can be separated from each other (can be bonded to each other after being separated), and respectively received in the first receiving mechanism X1And a second storage mechanism X2Among them. For example, the first storage mechanism X can be used1The first control switch T1 is used to fold the first flexible substrate 110 and the first flexible circuit board 113 (in some embodiments, the first flexible printed circuit board) to the first storage mechanism X1In or by the first storing means X1And (7) sending out. Similarly, by the second storage mechanism X2The second control switch T2 is used to fold the second flexible substrate 120 and the second flexible circuit board 123 (in some embodiments, the second flexible printed circuit board) into the second storage mechanism X2In or by a second storing means X1And (7) sending out.
FIG. 9B is a schematic diagram showing an application of the flexible display 20I according to another embodiment of the invention. The flexible display 20I can be applied to the flexible display 20 shown in fig. 2A to 2C, the flexible display 20' shown in fig. 8B, and other suitable flexible displays.
Referring to fig. 9B, the first flexible substrate 110 and the second flexible substrate 220 of the flexible display 20I can be bonded by the bonding layer TL, and the bonding layer TL includes a material capable of being repeatedly bonded, so that the first flexible substrate 110 and the second flexible substrate 220 can be separated from each other (after separation, the first flexible substrate 110 and the second flexible substrate 220 can still be separated from each otherAttached to each other) and stored in the first storage mechanism X3Among them. For example, the first storage mechanism X can be used3The first control switch T3 above folds the first flexible substrate 110, the first flexible printed circuit board 113 (in some embodiments, further includes a first flexible printed circuit board), the second flexible substrate 220, and the second flexible printed circuit board 223 (in some embodiments, further includes a second flexible printed circuit board) to the first storage mechanism X3In or by the first storing means X3And (7) sending out.
Fig. 10A is an exploded view of a flexible display 70 according to an embodiment of the invention. The flexible display 70 is similar to the flexible display 10 shown in fig. 1A to 1C, but includes a first flexible printed circuit board 717, and the shapes of the first flexible wiring board 713 and the second flexible wiring board 723 are different.
Referring to fig. 10A, the flexible display 70 includes a first flexible substrate 710, a first display area AA1, a first chip 715, a first substrate bonding area BA1, a first flexible circuit board 713, a second flexible substrate 720, a second display area AA2, a second chip (not shown), a second substrate bonding area BA2, a second flexible circuit board 723, and a first flexible printed circuit board 717.
The first flexible substrate 710 has a first outer surface 710a and a first inner surface 710b opposite to the first outer surface 710 a. The first display area AA1 is located on the first outer surface 710a of the first flexible substrate 710. The first substrate bonding area BA1 is located at the first outer surface 710a of the first flexible substrate 710. The first wafer 715 is located on the first outer surface 710a of the first flexible substrate 710 and is disposed between the first display area AA1 and the first substrate bonding area BA 1. The first flexible wiring board 713 is located on the first outer surface 710a of the first flexible substrate 710 and is connected to the first flexible substrate 710 through the first substrate bonding area BA 1.
The second flexible substrate 720 has a second outer surface 720a and a second inner surface 720b opposite to the second outer surface 720a, wherein the second inner surface 720b is attached to the first inner surface 710b, so that the first outer surface 710a and the second outer surface 720a are disposed away from each other. In some embodiments, the second inner surface 720b and the first inner surface 710b can be attached by an adhesive layer (not shown). The second display area AA2 is located on the second outer surface 720a of the second flexible substrate 720. The second substrate bonding area BA2 is located on the second outer surface 720a of the second flexible substrate 720. The second chip (not shown) is disposed on the second outer surface 720a of the second flexible substrate 720 and between the second display area AA2 and the second substrate bonding area BA 2. The second flexible wiring board 723 is located on the second outer surface 720a of the second flexible substrate 120, and is connected to the second flexible substrate 720 through a second substrate bonding area BA 2.
In some embodiments, the first flexible printed circuit 717 is located between the first flexible wiring board 713 and the second flexible wiring board 723, and the first flexible printed circuit 717 has a first surface 717a and a second surface 717b opposite to the first surface 717 a. The first flexible printed circuit 717 further has a central axis 717C, and the central axis 717C divides the first flexible printed circuit 717 into two regions opposite to each other. The first flexible printed circuit board 717 has a first circuit board binding area BB1 on the first surface 717a and a second circuit board binding area BB2 on the second surface 717b, and the first flexible circuit board 713 and the second flexible circuit board 723 are connected to the first flexible printed circuit board 717 through the first circuit board binding area BB1 and the second circuit board binding area BB2, respectively. When perpendicularly projected onto the first surface 717a of the first flexible printed circuit board 717, the first circuit board binding area BB1 and the second circuit board binding area BB2 are arranged along a first direction (e.g., X-axis direction) on both sides of the central axis 717C, wherein the first direction is parallel to an extending direction of a lower boundary 710L of the first flexible substrate 710.
In some embodiments, the first flexible circuit board 710 includes a first section 7131, a second section 7132 and a third section 7133 that are connected to each other, the second section 7132 is located between the first section 7131 and the third section 7133, the second flexible circuit board 723 includes a fourth section 7231, a fifth section 7232 and a sixth section 7233 that are connected to each other, and the fifth section 7232 is located between the fourth section 7231 and the sixth section 7233. Also, the direction in the second section 7132 extending from the first section 7131 to the third section 7133 is different from the direction in the fifth section 7232 extending from the fourth section 7231 to the sixth section 7233. For example, the direction in the second section 7132 extending from the first section 7131 to the third section 7133 is opposite (i.e., 180 ° different) to the direction in the fifth section 7232 extending from the fourth section 7231 to the sixth section 7233.
In some embodiments, in the extending direction perpendicular to the lower boundary 710L of the first flexible substrate 710, the distance D between an upper boundary BB1U of the first circuit board binding region BB1 and an upper boundary 717U of the first flexible printed circuit board 717HNot less than 6 mm.
Fig. 10B is an exploded view of the flexible display 80 according to an embodiment of the invention. The flexible display 80 is similar to the flexible display 20 shown in fig. 2A to 2C in the exploded view, and is different in that it further includes a first flexible printed circuit board 817 and the lengths of the first flexible printed circuit board 813 and the second flexible printed circuit board 823 are different.
Referring to fig. 10B, the flexible display 80 includes a first flexible substrate 810, a first display area AA1, a first chip 815, a first substrate bonding area BA1, a first flexible circuit board 813, a second flexible substrate 820, a second display area AA2, a second chip (not shown), a second substrate bonding area BA2, a second flexible circuit board 823, and a first flexible printed circuit board 817.
The first flexible substrate 810 has a first outer surface 810a and a first inner surface 810b opposite to the first outer surface 810 a. The first display area AA1 is located at the first outer surface 810a of the first flexible substrate 810. The first substrate bonding area BA1 is located at the first outer surface 810a of the first flexible substrate 810. The first wafer 815 is disposed on the first outer surface 810a of the first flexible substrate 810 and is disposed between the first display area AA1 and the first substrate bonding area BA 1. The first flexible wiring board 813 is located on the first outer surface 810a of the first flexible substrate 810, and is connected to the first flexible substrate 810 through a first substrate bonding area BA 1.
The second flexible substrate 820 has a second outer surface 820a and a second inner surface 820b opposite to the second outer surface 820a, wherein the second inner surface 820b is attached to the first inner surface 810b, so that the first outer surface 810a and the second outer surface 820a are away from each other. In some embodiments, the second inner surface 820b and the first inner surface 810b can be attached using an adhesive layer (not shown). The second display area AA2 is located on the second outer surface 820a of the second flexible substrate 820. The second substrate bonding area BA2 is located on the second outer surface 820a of the second flexible substrate 820. The second wafer (not shown) is disposed on the second outer surface 820a of the second flexible substrate 820 and between the second display area AA2 and the second substrate bonding area BA 2. The second flexible wiring board 823 is located on the second outer surface 820a of the second flexible substrate 820, and is connected to the second flexible substrate 820 through the second substrate bonding area BA 2.
In some embodiments, the first flexible printed circuit board 817 is located between the first flexible circuit board 813 and the second flexible circuit board 823, and the first flexible printed circuit board 817 has a first surface 817a and a second surface 817b opposite to the first surface 817 a. The first flexible printed circuit 817 further has a central axis 817C, and the central axis 817C divides the first flexible printed circuit 817 into two regions facing each other. The first flexible printed circuit board 817 has a first circuit board binding region BB1 located on the first surface 817a and a second circuit board binding region BB2 located on the second surface 817b, and the first flexible circuit board 813 and the second flexible circuit board 823 are connected to the first flexible printed circuit board 817 through the first circuit board binding region BB1 and the second circuit board binding region BB2, respectively. When perpendicularly projected onto the first surface 817a of the first flexible printed circuit board 817, the first circuit board binding region BB1 and the second circuit board binding region BB2 are arranged along a second direction (e.g., Y-axis direction) on two sides of the central axis 817C, wherein the second direction is perpendicular to an extending direction of a lower boundary 810L of the first flexible substrate 810.
In some embodiments, the length L of the first flexible wiring board 813CMay be different from the length L of the second flexible wiring board 823D. For example, the length L of the first flexible wiring board 813CCan be less than the length L of the second flexible circuit board 823DHowever, the invention is not limited thereto.
In some embodiments, the extension at a lower boundary 810L perpendicular to the first flexible substrate 810Distance D between first circuit board binding region BB1 and second circuit board binding region BB2 in the extending directionINot less than 6 mm.
According to an embodiment of the present invention, a flexible display is provided. The flexible display comprises a first flexible substrate, a first display area, a first substrate binding area and a first flexible circuit board. The first flexible substrate has a first outer surface and a first inner surface opposite to the first outer surface. The first display area is located on the first outer surface of the first flexible substrate. The first substrate binding region is located on a first outer surface of the first flexible substrate, wherein the first substrate binding region has a first center line. The first flexible circuit board is positioned on the first outer surface of the first flexible substrate and is connected with the first flexible substrate through the first substrate binding area; a first distance is arranged between a lower boundary of the first display area and the first central line, a second distance is arranged between a lower boundary of the first flexible substrate and the first central line, and the second distance is equal to or larger than the first distance.
Compared with the case that the distance between the lower boundary of the first flexible substrate and the first central line of the first substrate binding area is smaller than the distance between the lower boundary of the first display area and the first central line of the first substrate binding area, the distance between the lower boundary of the first flexible substrate and the first central line of the first substrate binding area is equal to or larger than the distance between the lower boundary of the first display area and the first central line of the first substrate binding area, and the first flexible substrate can provide larger supporting force for the first flexible circuit board, so that the risk that the first flexible circuit board is separated from the first substrate binding area can be reduced, the physical and electrical connection among the first flexible circuit board, the first substrate binding area and the first flexible substrate can be ensured, the damage of the flexible display is avoided, and the service life of the flexible display can be prolonged.
In summary, although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. Various modifications and alterations may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims (20)

1. A flexible display, characterized in that the flexible display comprises:
the first flexible substrate is provided with a first outer surface and a first inner surface opposite to the first outer surface;
a first display area located on the first outer surface of the first flexible substrate;
a first substrate bonding area located on the first outer surface of the first flexible substrate, wherein the first substrate bonding area has a first centerline;
the first flexible circuit board is positioned on the first outer surface of the first flexible substrate and is connected with the first flexible substrate through the first substrate binding area;
wherein a first distance is arranged between a lower boundary of the first display area and the first central line, a second distance is arranged between a lower boundary of the first flexible substrate and the first central line, and the second distance is equal to or greater than the first distance.
2. The flexible display of claim 1, wherein the flexible display further comprises:
a second flexible substrate having a second outer surface and a second inner surface opposite to the second outer surface, wherein the second inner surface is attached to the first inner surface such that the first outer surface and the second outer surface are disposed away from each other;
the second display area is positioned on the second outer surface of the second flexible substrate;
a second substrate bonding area located on the second outer surface of the second flexible substrate, wherein the second substrate bonding area has a second centerline;
the second flexible circuit board is positioned on the second outer surface of the second flexible substrate and is connected with the second flexible substrate through the second substrate binding area;
wherein a third distance is provided between a lower boundary of the second display region and the second center line, a fourth distance is provided between a lower boundary of the second flexible substrate and the second center line, and the fourth distance is equal to or greater than the third distance.
3. The flexible display of claim 2, wherein an adhesive layer is disposed between the first flexible substrate and the second flexible substrate, and wherein the adhesive layer comprises a repositionable material.
4. The flexible display of claim 2, wherein the first display area has an upper boundary, the upper boundary of the first display area being opposite the lower boundary of the first display area, the second display area having an upper boundary, the upper boundary of the second display area being opposite the lower boundary of the second display area, wherein the upper boundary of the first display area corresponds to the lower boundary of the second display area, and the lower boundary of the first display area corresponds to the upper boundary of the second display area.
5. The flexible display of claim 2, wherein the first display area has an upper boundary, the upper boundary of the first display area being opposite the lower boundary of the first display area, the second display area having an upper boundary, the upper boundary of the second display area being opposite the lower boundary of the second display area, wherein the upper boundary of the first display area corresponds to the upper boundary of the second display area, and the lower boundary of the first display area corresponds to the lower boundary of the second display area.
6. The flexible display of claim 2, wherein the second display area has an upper boundary, the upper boundary of the second display area being opposite the lower boundary of the second display area, the first flexible substrate has an upper boundary, the upper boundary of the first flexible substrate being opposite the lower boundary of the first flexible substrate, the second flexible substrate has an upper boundary, the upper boundary of the second flexible substrate being opposite the lower boundary of the second flexible substrate,
wherein a fifth distance is provided between the upper boundary of the first flexible substrate and the upper boundary of the first display area, a sixth distance is provided between the upper boundary of the second flexible substrate and the upper boundary of the second display area, and the fifth distance is equal to the sixth distance, and the sixth distance is not more than 2 times the first distance.
7. The flexible display of claim 6, wherein the first flexible substrate comprises a first body portion and a first extension portion, the first extension portion is connected to the first body portion, and at least a portion of the first extension portion is projected to overlap the second substrate bonding area.
8. The flexible display of claim 6, wherein the second flexible substrate comprises a second body portion and a second extension portion, the second extension portion is connected to the second body portion, and at least a portion of the second extension portion is projected to overlap the first substrate bonding area.
9. The flexible display of claim 1, wherein the flexible display further comprises a first die disposed on the first outer surface and having an upper boundary and a lower boundary, wherein the upper boundary of the first die has a seventh distance from the lower boundary of the first display area, and the lower boundary of the first die has an eighth distance from the upper boundary of the first substrate bonding area, and wherein the seventh distance is greater than the eighth distance.
10. The flexible display of claim 1, wherein the first substrate bonding area has a lower boundary, and a distance between the lower boundary of the first substrate bonding area and the lower boundary of the first flexible substrate is greater than 0.3mm or less than or equal to 9 mm.
11. The flexible display of claim 1, wherein the first flexible substrate comprises a first body portion and a first extension portion, the first extension portion is connected to the first body portion, the first body portion has a lower boundary, the first extension portion has a lower boundary, a ninth distance is provided between the lower boundary of the first extension portion and the lower boundary of the first display area, and a tenth distance is provided between the lower boundary of the first body portion and the lower boundary of the first display area, the ninth distance is greater than the tenth distance.
12. The flexible display of claim 1, further comprising a first flexible printed circuit board connected to the first inner surface;
the first flexible printed circuit board is provided with a first circuit board binding area, the first flexible circuit board is connected with the first flexible printed circuit board through the first circuit board binding area, and at least part of projection of the first flexible printed circuit board is overlapped with the first substrate binding area.
13. The flexible display of claim 2, further comprising a first flexible printed circuit board connecting the first inner surface and the second inner surface;
the first flexible printed circuit board is provided with a first circuit board binding area and a second circuit board binding area, the first flexible circuit board and the second flexible circuit board are connected to the first flexible printed circuit board through the first circuit board binding area and the second circuit board binding area respectively, and at least part of projection of the first flexible printed circuit board is overlapped with the first substrate binding area and the second substrate binding area.
14. The flexible display of claim 13, wherein the length of the first flexible wiring board is not equal to the length of the second flexible wiring board.
15. The flexible display of claim 2, further comprising a first flexible printed circuit board disposed between the first flexible circuit board and the second flexible circuit board, the first flexible printed circuit board having a first surface and a second surface opposite to the first surface;
the first flexible printed circuit board is further provided with a central axis, and the central axis divides the first flexible printed circuit board into two opposite areas.
16. The flexible display of claim 15, wherein the first flexible printed circuit board has a first circuit board bonding area and a second circuit board bonding area thereon, and the first flexible circuit board and the second flexible circuit board are connected to the first flexible printed circuit board through the first circuit board bonding area and the second circuit board bonding area, respectively;
when the first flexible substrate is vertically projected on the first surface, the first circuit board bonding area and the second circuit board bonding area are arranged on two sides of the central axis along a first direction, wherein the first direction is parallel to the extending direction of a lower boundary of the first flexible substrate.
17. The flexible display of claim 15, wherein the first flexible printed circuit board has a first circuit board bonding area and a second circuit board bonding area thereon, and the first flexible circuit board and the second flexible circuit board are connected to the first flexible printed circuit board through the first circuit board bonding area and the second circuit board bonding area, respectively;
when the first flexible substrate is vertically projected on the first surface, the first circuit board bonding area and the second circuit board bonding area are arranged along a second direction and on two sides of the central axis, wherein the second direction is an extending direction perpendicular to a lower boundary of the first flexible substrate.
18. The flexible display of claim 15, wherein the first flexible circuit board comprises a first portion, a second portion, and a third portion connected to each other, the second portion being located between the first portion and the third portion, the second flexible circuit board comprising a fourth portion, a fifth portion, and a sixth portion connected to each other, the fifth portion being located between the fourth portion and the sixth portion;
wherein a direction in the second portion extending from the first portion to the third portion is different from a direction in the fifth portion extending from the fourth portion to the sixth portion.
19. The flexible display of claim 15, wherein the first flexible printed circuit board has a first circuit board bonding area and a second circuit board bonding area thereon, and the first flexible circuit board and the second flexible circuit board are connected to the first flexible printed circuit board through the first circuit board bonding area and the second circuit board bonding area, respectively;
in an extending direction perpendicular to a lower boundary of the first flexible substrate, a distance between an upper boundary of the first circuit board bonding area and an upper boundary of the first flexible printed circuit board is not less than 6 mm.
20. The flexible display of claim 15, wherein the first flexible printed circuit board has a first circuit board bonding area and a second circuit board bonding area thereon, and the first flexible circuit board and the second flexible circuit board are connected to the first flexible printed circuit board through the first circuit board bonding area and the second circuit board bonding area, respectively;
a distance between the first circuit board bonding area and the second circuit board bonding area is not less than 6mm in an extending direction perpendicular to a lower boundary of the first flexible substrate.
CN202010135901.7A 2020-03-02 2020-03-02 Flexible display Pending CN113345321A (en)

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