CN211957647U - Array substrate, flexible display panel and display device - Google Patents
Array substrate, flexible display panel and display device Download PDFInfo
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- CN211957647U CN211957647U CN202021177126.3U CN202021177126U CN211957647U CN 211957647 U CN211957647 U CN 211957647U CN 202021177126 U CN202021177126 U CN 202021177126U CN 211957647 U CN211957647 U CN 211957647U
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Abstract
The application provides an array substrate, flexible display panel and display device, wherein, array substrate includes: a crimping area; a plurality of first crimp terminals are arranged in the crimp region, the plurality of first crimp terminals being arranged side by side; the crimping area is provided with a median line, the median line is perpendicular to the arrangement direction of the first crimping terminals, and the first crimping terminals are evenly distributed on two opposite sides of the median line and are equal in spacing; each first crimp terminal includes a plurality of segments, the segments are connected in sequence, and an included angle between an extending direction of the segments and an arrangement direction of the first crimp terminals gradually increases or gradually decreases. In the array substrate, the flexible display panel and the display device provided by the application, the crimping terminal is enabled to have a plurality of extension angles by adjusting the shape of the crimping terminal, so that the abnormal problem of expansion and shrinkage is avoided, the correct alignment of the crimping terminal of the array substrate and the COF terminal is ensured, and the crimping yield is further improved.
Description
Technical Field
The application relates to the technical field of flexible display, in particular to an array substrate, a flexible display panel and a display device.
Background
The flexible display device is a display device made of a flexible material and capable of bending and deforming, and due to the excellent display characteristics of flexibility, portability and the like, the flexible display device can be applied to multiple fields such as wearable equipment, mobile equipment, augmented reality and virtual technology equipment, and is considered to be the mainstream of the future display field.
The Module manufacturing process of the conventional flexible display device includes a crimping process, and a terminal of the array substrate is crimped with a terminal of a chip on film (COF for short) through the crimping process.
However, in the actual manufacturing process, it is found that the array substrate has batch expansion and contraction abnormality of the crimping terminals, that is, in the crimping region (i.e., Bonding region) of the array substrate, the terminal pitch on one side is zero relative to COF expansion and contraction, and the terminal pitch on the other side is often beyond the minimum required pitch relative to COF expansion and contraction. In this way, when COF is pressure-bonded, the COF terminals and the array substrate terminals are misaligned, which results in poor pressure-bonding of the COF and the array substrate.
Therefore, how to overcome the expansion and shrinkage abnormality and improve the yield of COF and array substrate by compression is a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides an array substrate, a flexible display panel and a display device to solve the problem of terminal alignment dislocation caused by abnormal expansion and contraction of a flexible display screen in the prior art when crimping.
In order to solve the above technical problem, the utility model provides a pair of array substrate, array substrate includes: a crimping area;
a plurality of first crimp terminals are arranged in the crimp region, the plurality of first crimp terminals being arranged side by side;
the crimping area is provided with a median line, the median line is perpendicular to the arrangement direction of the first crimping terminals, and the first crimping terminals are evenly distributed on two opposite sides of the median line and are equal in spacing;
each first crimp terminal includes a plurality of segments, the segments are connected in sequence, and an included angle between an extending direction of the segments and an arrangement direction of the first crimp terminals gradually increases or gradually decreases.
Optionally, in the array substrate, a first section and an nth section of the first crimp terminal are respectively located at the head end and the tail end of the first crimp terminal, an extending direction of the first section is set according to a first parameter, and an extending direction of the nth section is set according to a third parameter;
the first parameter is a minimum value of the expansion and contraction rate of the array substrate, and the third parameter is a maximum value of the expansion and contraction rate of the array substrate.
Optionally, in the array substrate, the first crimp terminal includes a first section, a second section, and a third section connected in sequence, center lines of the first section, the second section, and the third section are all straight line segments, an extension angle of the first section is set according to a first parameter, an extension angle of the second section is set according to a second parameter, and an extension angle of the third section is set according to a third parameter.
Optionally, in the array substrate, the second parameter is a median of the expansion and contraction rate of the array substrate.
Optionally, in the array substrate, the plurality of first crimp terminals have equal widths and areas, and the first crimp terminals located at two opposite sides of the median line are symmetrically arranged.
Optionally, the array substrate further includes at least one second crimp terminal, where the at least one second crimp terminal is arranged side by side with the plurality of first crimp terminals and is located between two adjacent first crimp terminals;
a center line of one of the at least one second crimp terminal coincides with a median line of the crimp region.
Optionally, in the array substrate, the plurality of first crimp terminals and the at least one second crimp terminal have the same width and area.
Correspondingly, the utility model also provides a flexible display panel, flexible display panel includes as above array substrate.
Correspondingly, the utility model also provides a display device, display device includes as above flexible display panel.
The utility model provides an among array substrate, flexible display panel and display device, through the shape of adjustment crimping terminal, make it have a plurality of extension angles, avoid the abnormal problem of harmomegathus from this, guarantee array substrate's crimping terminal and COF terminal correctly counterpoint, and then promote the crimping yield.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram illustrating a crimping region of an array substrate according to a first embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a crimping region of an array substrate according to a second embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
[ EXAMPLES one ]
Please refer to fig. 1, which is a schematic structural diagram of a crimping region of an array substrate according to an embodiment of the present invention. As shown in fig. 1, the array substrate includes: a crimping region 10; a plurality of first crimp terminals 11 are provided in the crimp region 10, the plurality of first crimp terminals 11 being arranged side by side; the crimp region 10 has a median line (shown by a longitudinal dotted line in the figure) perpendicular to the arrangement direction of the first crimp terminals 11, and the plurality of first crimp terminals 11 are equally distributed on opposite sides of the median line and at equal intervals; each of the first crimp terminals 11 includes a plurality of sections which are connected in sequence, and an angle between an extending direction of the plurality of sections and an arrangement direction of the first crimp terminals 11 is gradually increased or gradually decreased.
Specifically, the array substrate is a flexible transparent substrate and is made of flexible materials such as Polyimide (PI), polyethylene naphthalate (PEN) or polyethylene terephthalate (PET). The array substrate includes a display area (not shown in the figure) and a pressing area 10, the display area includes a plurality of display devices for performing a display function, a plurality of first pressing terminals 11 are disposed in the pressing area 10, and the plurality of first pressing terminals 11 are disposed side by side for connecting COF terminals, so as to transmit a control signal on the COF to the display area.
As shown in fig. 1, the crimp region 10 has a median line (shown by a longitudinal dotted line in the figure) perpendicular to the arrangement direction of the first crimp terminals 11, and the plurality of first crimp terminals 11 are equally distributed on opposite sides of the median line with equal intervals.
Each of the crimp terminals 11 includes a plurality of segments connected in sequence, and the extending directions of the segments and the arrangement direction of the first crimp terminals are all at an angle greater than 0 ° and less than 90 °.
In each crimp terminal 11, a first section (i.e., a first section) and an nth section (i.e., a last section) are respectively located at the head end and the tail end of the first crimp terminal 11, an extending direction of the first section is set according to a first parameter, an extending direction of the nth section is set according to a third parameter, the first parameter refers to a small expansion and contraction rate value of the array substrate, and the third parameter refers to a small expansion and contraction rate value of the array substrate.
In the following, an example will be described in which N is 3, that is, the nth segment is the third segment. With reference to fig. 1, each of the crimp terminals 11 includes a first section 11a, a second section 11b, and a third section 11c connected in sequence, where center lines of the first section 11a, the second section 11b, and the third section 11c are all straight line segments, that is, an extending direction of the first section 11a is set according to a first parameter (i.e., a smaller value of the expansion and contraction rate of the array substrate), an extending direction of the second section 11b is set according to a second parameter (i.e., a smaller value of the expansion and contraction rate of the array substrate), and an extending direction of the third section 11c is set according to a third parameter (i.e., a minimum value of the expansion and contraction rate of the array substrate).
Wherein an angle α between the extending direction of the first section 11a and the arranging direction of the crimp terminals is an extending angle of the first section 11a, an angle θ between the extending direction of the second section 11b and the arranging direction of the crimp terminals is an extending angle of the second section 11b, an angle β between the extending direction of the third section 11c and the arranging direction of the crimp terminals is an extending angle of the third section 11c, and α > θ > β.
Accordingly, the distance between any two adjacent first sections 11a is smaller than the distance between any two adjacent second sections 11b, and the distance between any two adjacent second sections 11b is smaller than the distance between any two adjacent third sections 11 c.
In this embodiment, each of the crimp terminals 11 includes three sections connected in sequence, and the extending directions of the three sections are set according to the smaller expansion/contraction rate value, and the minimum expansion/contraction rate value of the array substrate, respectively. Wherein, the small expansion and contraction rate value and the minimum expansion and contraction rate value are obtained by a plurality of expansion and contraction rate tests.
The specific process of the expansion and contraction rate test comprises the following steps: firstly, preparing a test sample; next, the total length of crimping of the test specimen (i.e., the total length L1 of the crimp region 10 before crimping) was measured for the first time; then, placing the test sample in a constant temperature and humidity environment (the temperature is 23 +/-3 ℃, and the humidity is 59 +/-6% RH) for standing for 21 days; thereafter, a die set crimping process was performed, and the total crimped length of the test sample was measured a second time after the crimping process was completed (i.e., the total length L2 of the crimped region 10 after crimping); finally, the expansion and contraction rate Δ, which is (L2-L1) ÷ L1, can be obtained by calculating the rate of change of the total length of the crimp.
Wherein the total crimp length refers to a width of the crimp region 10, the width of the crimp region 10 is proportional to the number of crimp terminals 11 and a distribution width of the individual crimp terminals 11, the distribution width of the individual crimp terminals 11 is a width W of the crimp terminals 11PA minimum distance G from the crimp terminalPAnd the total length of the pressure contact region 10 is Nx (G)P+WP). Where N denotes the number of crimp terminals 11.
The substrate of the test sample and the array substrate adopt the same flexible base material, a low-temperature polycrystalline silicon thin film transistor (LTPS-TFT), an organic electroluminescent device (OLED) and a flexible packaging layer (TFE) are sequentially formed on the substrate, and a protective film with weak adhesion (the tearing force is less than or equal to 1gf/25mm) is attached to the test sample.
In the multiple expansion and contraction rate test, the maximum value of the obtained expansion and contraction rate is the minimum value of the expansion and contraction rate, the minimum value of the obtained expansion and contraction rate is a small value, and the middle value of the obtained expansion and contraction rate is a small value of the expansion and contraction rate.
In this embodiment, each section constituting the crimp terminal 11 is designed with a corresponding expansion/contraction compensation section according to the material characteristics of the array substrate. The array substrate is made of different materials, and the expansion and contraction rates of the array substrate are different. Accordingly, the extension angles of the sections of the crimp terminal 11 should be changed.
In other embodiments, each crimp terminal 11 may also include four, five or more sequentially connected segments, i.e., N is 4 or another number greater than 5. The extending directions of the first section and the nth section (i.e. the head and the tail) in the crimp terminal 11 are respectively set according to the first parameter (the small value of the expansion and contraction rate) and the third parameter (the minimum value of the expansion and contraction rate) of the array substrate, the extending directions of the other sections except the first section and the nth section are set according to the other parameters of the array substrate, and the other parameters are required to be smaller than the third parameter and larger than the first parameter.
For example, in each of the crimp terminals 11, the extending directions of the first section and the nth section are set according to the small expansion/contraction rate value and the minimum expansion/contraction rate value of the array substrate, the extending angles of the two sections are α and β, respectively, and the extending angles of the other sections are located between α and β. Alternatively, in each of the crimp terminals 11, three sections are respectively set according to the smaller value of the expansion and contraction rate of the array substrate, the smaller value of the expansion and contraction rate, and the minimum value of the expansion and contraction rate, the extension angles of the three sections are respectively α, θ, and β, and the extension angles of the other sections are located between α and θ, or between θ and β.
In the present embodiment, the pitch of the first crimp terminals 11 is designed to be narrow at the top and wide at the bottom, that is, the distance between any two adjacent first crimp terminals 11 is gradually increased from top to bottom. In other embodiments, the pitch of the crimp terminals 11 may also adopt a design of being narrow at the bottom and wide at the top, that is, the distance between any two adjacent first crimp terminals 11 becomes gradually smaller from the top to the bottom, as long as the pitch of the crimp terminals 11 and the terminal pitch of the COF adopt the same design.
Preferably, the first crimp terminals 11 located at opposite sides of the median line are symmetrically arranged. In this way, of the first crimp terminals 11 on the left and right sides of the median line, the extending directions of the two first crimp terminals 11 at the same distance from the median line are symmetrically arranged with respect to the median line, so that the occupied spaces of the two first crimp terminals 11 are the same.
Preferably, the plurality of first crimp terminals 11 are equal in width and area. So, guarantee that the impedance after the crimping equals, avoid the electric current between the crimping terminal or voltage to appear differentiating, and then cause adverse effect to the display effect.
In this embodiment, the first crimp terminal 11 is designed to have a multi-angle combination, and has a plurality of extension angles, wherein the central line is not a straight line, but a broken line, the bending directions of the broken line are consistent, and the bending angles gradually increase or gradually decrease, that is, the extension directions of the plurality of sections of the first crimp terminal 11 are different from each other, and the included angles between the extension directions of the plurality of sections and the arrangement direction of the first crimp terminal 11 gradually increase or gradually decrease. Accordingly, the pitch of the first crimp terminal 11 gradually changes along the direction parallel to the median line.
Compared with the traditional design, the occupied space of the first crimping terminal 11 is relatively large, the expansion and contraction of materials can be compensated, the requirement of crimping alignment can be met even if the expansion or contraction of the limit occurs, and the dislocation of terminal alignment is avoided.
[ example two ]
Please refer to fig. 2, which is a schematic structural diagram of a crimping region of an array substrate according to a second embodiment of the present invention. As shown in fig. 2, the array substrate includes: a crimping zone 20; a plurality of first crimp terminals 11 are provided in the crimp region 20, the plurality of first crimp terminals 11 being arranged side by side; the crimp region 20 has a median line (shown by a longitudinal dotted line in the figure) perpendicular to the arrangement direction of the first crimp terminals 11, and the plurality of first crimp terminals 11 are equally distributed on opposite sides of the median line and at equal intervals; each of the first crimp terminals 11 includes a plurality of sections which are connected in sequence, and an angle between an extending direction of the plurality of sections and an arrangement direction of the first crimp terminals 11 is gradually increased or gradually decreased.
Specifically, the array substrate includes a display area (not shown in the figure) and a pressing area 20, the display area includes a plurality of display devices for performing a display function, a plurality of first pressing terminals 11 are disposed in the pressing area 20, and the plurality of first pressing terminals 11 are disposed side by side for connecting COF terminals, so as to transmit a control signal on the COF to the display area.
As shown in fig. 2, the crimp region 20 has a median line (shown by a longitudinal dotted line in the figure), the median line is perpendicular to the arrangement direction of the first crimp terminals 11, the first crimp terminals 11 are equally distributed on two opposite sides of the median line and are equally spaced, each of the crimp terminals 11 includes a first section 11a, a second section 11b and a third section 11c connected in sequence, the extending direction of the first section 11a is set according to a smaller value of the ratio of expansion and contraction, the extending direction of the third section 11c is set according to a smaller value of the ratio of expansion and contraction, and the extending direction of the third section 11c is set according to a smaller value of the ratio of expansion and contraction.
An angle α between the extending direction of the first section 11a and the arranging direction of the crimp terminals is an extending angle of the first section 11a, an angle θ between the extending direction of the second section 11b and the arranging direction of the crimp terminals is an extending angle of the second section 11b, and an angle β between the extending direction of the third section 11c and the arranging direction of the crimp terminals is an extending angle of the third section 11 c. The included angle alpha is maximum, the included angle beta is minimum, and the included angle theta is centered.
With continued reference to fig. 2, at least one second crimp terminal 12 is further disposed in the crimp region 20, and the at least one second crimp terminal 12 is disposed side by side with the plurality of first crimp terminals 11 and is located between two adjacent first crimp terminals 11; the center line of one of the at least one second crimp terminal 12 coincides with the median line of the crimp region 10.
The present embodiment is different from the first embodiment in that a second crimp terminal 12 is further disposed in the crimping region of the array substrate, and the second crimp terminal 12 is disposed at an intermediate position of the crimping region and adopts a conventional design.
Preferably, the second crimp terminal 12 has the same width and area as the first crimp terminal 11, and the second crimp terminal 12 extends in the same direction and is perpendicular to the arrangement direction of the first crimp terminals 11.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
The above drawings only schematically illustrate the crimping region of the array substrate provided by the present invention. For the sake of clarity, the shapes of the elements and the number of the elements in the above figures are simplified and some elements are omitted, so that those skilled in the art can make changes according to actual needs, and the changes are all within the protection scope of the present invention and will not be described herein.
To sum up, the utility model provides an array substrate, flexible display panel and display device through the shape of adjustment crimping terminal, makes it have a plurality of extension angles, avoids the abnormal problem of harmomegathus from this, guarantees array substrate's crimping terminal and COF terminal's correct alignment, and then promotes the crimping yield.
The foregoing is a more detailed description of the present application in connection with specific preferred embodiments and it is not intended that the present application be limited to these specific details. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (8)
1. An array substrate, comprising: a crimping area;
a plurality of first crimp terminals are arranged in the crimp region, the plurality of first crimp terminals being arranged side by side;
the crimping area is provided with a median line, the median line is perpendicular to the arrangement direction of the first crimping terminals, and the first crimping terminals are evenly distributed on two opposite sides of the median line and are equal in spacing;
each first crimp terminal includes a plurality of segments, the segments are connected in sequence, and an included angle between an extending direction of the segments and an arrangement direction of the first crimp terminals gradually increases or gradually decreases.
2. The array substrate of claim 1, wherein a first section and an Nth section of the first crimp terminal are respectively located at the head end and the tail end of the first crimp terminal, the extending direction of the first section is set according to a first parameter, and the extending direction of the Nth section is set according to a third parameter;
the first parameter is a minimum value of the expansion and contraction rate of the array substrate, and the third parameter is a maximum value of the expansion and contraction rate of the array substrate.
3. The array substrate according to claim 2, wherein the first crimp terminal comprises a first section, a second section and a third section which are connected in sequence, the center lines of the first section, the second section and the third section are all straight line segments, the extension angle of the first section is set according to a first parameter, the extension angle of the second section is set according to a second parameter, and the extension angle of the third section is set according to a third parameter.
4. The array substrate of claim 3, wherein the second parameter is a median of the expansion and contraction rate of the array substrate.
5. The array substrate of claim 1, further comprising at least one second crimp terminal disposed side-by-side with the plurality of first crimp terminals and between two adjacent first crimp terminals;
a center line of one of the at least one second crimp terminal coincides with a median line of the crimp region.
6. The array substrate of claim 5, wherein the plurality of first crimp terminals and the at least one second crimp terminal are equal in width and area.
7. A flexible display panel, comprising: the array substrate of any one of claims 1 to 6.
8. A display device, comprising: the flexible display panel of claim 7.
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| CN202021177126.3U CN211957647U (en) | 2020-06-22 | 2020-06-22 | Array substrate, flexible display panel and display device |
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| CN202021177126.3U CN211957647U (en) | 2020-06-22 | 2020-06-22 | Array substrate, flexible display panel and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113903767A (en) * | 2020-06-22 | 2022-01-07 | 上海和辉光电股份有限公司 | Array substrate, flexible display panel and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113903767A (en) * | 2020-06-22 | 2022-01-07 | 上海和辉光电股份有限公司 | Array substrate, flexible display panel and display device |
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