CN111292626B - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN111292626B CN111292626B CN202010140445.5A CN202010140445A CN111292626B CN 111292626 B CN111292626 B CN 111292626B CN 202010140445 A CN202010140445 A CN 202010140445A CN 111292626 B CN111292626 B CN 111292626B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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Abstract
The embodiment of the invention provides a flexible display panel, wherein a data line for providing a data signal for a bent display area and a data line for providing a data signal for central display are in short circuit through a switch transistor, so that the data line for providing the data signal for the bent display area can not be completely connected to a driving chip at one end of the flexible display panel, but can be in short circuit with the data line for providing the data signal for the central display area, and the data signal can be provided for the bent display area by bypassing an R-corner frame at the other end of the flexible display panel, thereby reducing the number of the data lines bypassing the R-corner at one end of the display panel and reducing the width of the frame. The technical problem that a narrow frame cannot be achieved in a four-side bending display screen in the prior art is solved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a flexible display panel and a display device.
[ background of the invention ]
With the development of display technology, display panels are constantly changing from large to thin, from narrow frames to no frames, from unbendable to bendable, and from curved to four-sided. In the technology of the four-sided curved display screen, when a data line for providing a data signal voltage (Vdata) to the display area a of the four-sided curved display screen is manufactured, the data line 1 needs to be wound at the R-corner frame to provide a data signal to the display area of the four-sided curved display screen, as shown in fig. 1, the number of the data lines that need to be wound around the R-corner is related to the width (or pixel number) of the display area, and when the display area a is wider, the number of the data lines 1 that need to be wound at the R-corner is also greater, the width of the frame width B is also greater, and thus, a narrow frame cannot be realized.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a flexible display panel, in which a data line for providing a data signal to a bend display area and a data line for providing a data signal to a center display are shorted by a switch transistor, so that the data line for providing the data signal to the bend display area may not be fully connected to a driving chip at one end of the flexible display panel, but may be shorted to the data line for providing the data signal to the center display area, and the data signal may be provided to the bend display area by bypassing an R-corner frame at the other end of the flexible display panel, thereby reducing the number of data lines bypassing the R-corner at one end of the flexible display panel and reducing the width of the frame. The technical problem that narrow frames cannot be achieved in four-side bending display screens in the prior art is solved.
According to an aspect of the present invention, an embodiment of the present invention provides a flexible display panel, including:
the flexible display panel comprises an array substrate, wherein the flexible display panel comprises a display area and a non-display area surrounding the display area, the display area comprises a bent display area and a central display area, the non-display area comprises a first non-display area and a second non-display area, and the first non-display area and the second non-display area are respectively positioned at two ends of the array substrate along a first direction;
the driving chip is arranged in the first non-display area;
a plurality of first driving circuits arranged on the array substrate and distributed in a first array in the central display area, wherein the column direction in the first array is the first direction;
a plurality of second driving circuits arranged on the array substrate and distributed in a second array in the bending display area, wherein the row direction in the second array is the first direction;
at least one group of data line groups arranged on the array substrate, wherein each data line group comprises a first data line positioned in the central display area and a second data line positioned in the bent display area, the first end of each first data line is electrically connected with the driving chip, the second end of each first data line is electrically connected with a row of first driving circuits, and the second end of each second data line is electrically connected with a row of second driving circuits; and
and at least one switching transistor disposed in the non-display region, a control terminal of the switching transistor receiving a first scan control signal, a first terminal of the switching transistor being electrically connected to a second terminal of the first data line in a group of the data line groups, and a second terminal of the switching transistor being electrically connected to a first terminal of the second data line in a group of the data line groups.
Optionally, the number of the data line groups is equal to the number of columns of the plurality of second driving circuits; the number of the switching transistors is equal to the number of columns of the plurality of second driving circuits;
wherein the switching transistors are disposed in the first non-display region and the second non-display region, respectively.
Optionally, the bending display area includes a first bending display area and a second bending display area, and the first bending display area and the second bending display area are respectively located at two ends of the array substrate along the second direction;
at least two of the switching transistors include: at least one first switching transistor and at least one second switching transistor,
a first end of the first switch transistor is electrically connected with a second end of the first data line in a group of data line groups, and a second end of the first switch transistor is electrically connected with a first end of the second data line in the group of data line groups, wherein the first end of the second data line is electrically connected with a column of the second driving circuits in the first bending display area;
a first end of the second switch transistor is electrically connected with a second end of the first data line in a group of data lines, and a second end of the second switch transistor is electrically connected with a first end of the second data line in the group of data lines, which is electrically connected with a row of the second driving circuits in the second bending display area;
wherein the number of the first switching transistors is equal to the number of the second switching transistors.
Optionally, in the first bending display area, a second end of one of the second data lines in two adjacent second data lines is electrically connected to a second end of the first switching transistor disposed in the first non-display area;
a second terminal of the second data line of the other of the two adjacent second data lines is electrically connected to a second terminal of the first switching transistor disposed in the second non-display region.
Optionally, in the second bending display area, a second end of one of the second data lines in two adjacent second data lines is electrically connected to a second end of the second switching transistor disposed in the first non-display area;
a second terminal of the second data line of the other of the two adjacent second data lines is electrically connected to a second terminal of the second switching transistor disposed in the second non-display region.
Optionally, the flexible display panel further includes:
and in the central display area, at least one third data line is arranged on the array substrate, the first end of the third data line is electrically connected with the driving chip, and the second end of the third data line is electrically connected with a row of the first driving circuits.
Optionally, at least one of the third data lines is located between two adjacent first data lines.
Optionally, all the third data lines are located between two adjacent first data lines closest to each other in the second direction of the array substrate.
Optionally, the number of the data line groups is less than the number of columns of the plurality of second driving circuits; the number of the switch transistors is less than the number of columns of the second driving circuits; the flexible display panel further includes:
at least one fourth data line arranged on the array substrate in the bending display area, wherein a first end of the fourth data line is electrically connected with the driving chip, and a second end of the fourth data line is electrically connected with a row of the second driving circuits;
wherein at least one of the switching transistors is disposed in the second non-display region.
Optionally, the bending display area includes a first bending display area and a second bending display area, and the first bending display area and the second bending display area are respectively located at two ends of the array substrate along a second direction;
in the first bending display area, the number of the second data lines is more than one,
at least one fourth data line is positioned between two adjacent second data lines.
Optionally, the bending display area includes a first bending display area and a second bending display area, and the first bending display area and the second bending display area are respectively located at two ends of the array substrate along a second direction;
in the first bending display area, all the fourth data lines are positioned between the second data line closest to the central display area and the central display area.
Optionally, the bending display area includes a first bending display area and a second bending display area, and the first bending display area and the second bending display area are respectively located at two ends of the array substrate along the second direction;
in the first bending display area, the absolute value of the difference between the number of the fourth data lines and the number of the second data lines is less than or equal to one.
Optionally, all of the switching transistors are disposed in the second non-display region.
Optionally, the switch transistors disposed in the second non-display area are respectively distributed at two ends of the array substrate along the second direction;
and the number of the switching transistors which are arranged in the second non-display area and distributed at two ends of the array substrate along the second direction is equal.
In another aspect, an embodiment of the present invention provides a display device, including:
the structure of the flexible display panel adopts the structure of the flexible display panel; and
a controller providing a first scan control signal to the switching transistor;
wherein, in a first period of time, the controller applies a first scan control signal having a first voltage amplitude to the gate of the switching transistor to turn off the switching transistor;
the controller applies a first scan control signal having a second voltage magnitude to the gate of the switching transistor to turn on the switching transistor in a second period.
Optionally, the number of the first time periods is greater than or equal to one, the number of the second time periods is greater than or equal to one, at least one of the first time periods and at least one of the second time periods are arranged in a crossed manner, and the sum of all the first time periods and all the second time periods is equal to one frame of image display time.
Optionally, the number of the first time periods is equal to the number of the second time periods.
Optionally, the first time is equal to the sum of display times of N frames of continuous pictures, and the second time is equal to the sum of display times of M frames of continuous pictures, where N is an integer greater than one, and M is an integer greater than one.
Optionally, N is greater than M.
The data lines for providing data signals for the bent display area and the data lines for providing data signals for the central display are in short circuit through the switch transistor, so that the data lines for providing the data signals for the bent display area can not be completely connected to the driving chip positioned at one end of the flexible display panel, but can be in short circuit with the data lines for providing the data signals for the central display area, and the data signals can be provided for the bent display area by bypassing the R-angle frame at the other end of the flexible display panel, thereby reducing the number of the data lines bypassing the R-angle at one end of the display panel and reducing the width of the frame.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible display panel in the prior art;
fig. 2 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a flexible display panel according to another embodiment of the invention;
fig. 4 is a schematic structural diagram of a D region of a flexible display panel according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a flexible display panel according to another embodiment of the invention;
fig. 6 is a schematic structural diagram of an F region in a flexible display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an F region in a flexible display panel according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of an F region in a flexible display panel according to another embodiment of the present invention;
fig. 9 is a timing control diagram illustrating a first scan control signal applied to a control terminal of a switching transistor by a controller in a display device according to an embodiment of the present invention;
fig. 10 is a timing control diagram of a first scan control signal applied to a control terminal of a switching transistor by a controller in a display device according to another embodiment of the present invention;
fig. 11 is a timing control diagram of a first scan control signal applied to a control terminal of a switching transistor by a controller in a display device according to another embodiment of the present invention.
[ detailed description ] embodiments
In order to better understand the technical scheme of the invention, the following detailed description of the embodiments of the invention is made with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely a relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, fourth, etc. may be used to describe the data lines in the embodiments of the present invention, the data lines should not be limited to these terms. These terms are only used to distinguish the data lines from each other.
Fig. 2 to 6 are schematic structural diagrams of a flexible display panel according to an embodiment of the present invention, as shown in fig. 2 to 6, the flexible display panel includes an array substrate, the flexible display panel includes a display area and a non-display area surrounding the display area, the display area includes a bending display area 32 and a central display area 31, the non-display area includes a first non-display area 41 and a second non-display area 42, and the first non-display area 41 and the second non-display area 42 are respectively located at two ends of the array substrate along a first direction; a driving chip 6 disposed in the first non-display area 41, wherein the driving chip 6 provides driving signals, such as data signal voltages, for the bending display area 32 and the central display area 31; in the central display area 31, a column direction in a first array of the plurality of first driving circuits 71 disposed on the array substrate and distributed in a first array is the first direction; a plurality of second driving circuits 72 disposed on the array substrate and distributed in a second array in the bending display area 32, wherein the column direction of the second array is the first direction; at least one group of data line groups 5 arranged on the array substrate, wherein the data line groups 5 comprise a first data line 51 positioned in the central display area 31 and a second data line 52 positioned in the bending display area 32, a first end of the first data line 51 is electrically connected with the driving chip 6, a second end of the first data line 51 is electrically connected with a row of first driving circuits 71, and a second end of the second data line 52 is electrically connected with a row of second driving circuits 72; and at least one switching transistor M disposed in the non-display region, a control terminal of the switching transistor M receiving the first Scan control signal Scan1, a first terminal of the switching transistor M being electrically connected to a second terminal of the first data line 51 in the set of data line groups 5, and a second terminal of the switching transistor M being electrically connected to a first terminal of the second data line 52 in the set of data line groups 5.
By shorting the second data line 52 for providing the data signal to the bent display region 32 and the first data line 51 for providing the data signal to the center display through a switching transistor M, the second data line 52 for providing the data signal to the bent display region 32 may not be fully connected to the driving chip 6 at one end of the flexible display panel, but may be shorted to the first data line 51 for providing the data signal to the center display region 31, and the data signal may be provided to the bent display region 32 by bypassing the R-corner frame at the second non-display region 42 of the flexible display panel, thereby reducing the number of data lines bypassing the R-corner at the first non-display region 41 of the display panel and reducing the width of the frame.
In an embodiment of the invention, the number of the data line groups 5 may be determined according to the number of the columns of the second driving circuits 72 of the bending display area 32, for example, when the number of the data line groups 5 may be equal to the number of the columns of the second driving circuits 72 of the bending display area 32, that is, the data lines for providing the data signals to the second driving circuits 72 of the entire bending display area 32 are all the second data lines 52, as shown in fig. 2 to fig. 4. When the number of the data line groups 5 is equal to the number of the columns of the second driving circuits 72 of the bending display area 32, the number of the switching transistors M is also equal to the number of the columns of the second driving circuits 72 of the bending display area 32, and the switching transistors M are respectively disposed in the first non-display area 41 and the second non-display area 42, that is, the second data lines 52 respectively bypass the R corner in the first non-display area 41 and the R corner in the second non-display area 42 to provide data signals for the bending display area 32, so that the frame width at the R corner in the first non-display area 41 is reduced, and a narrow frame is facilitated to be implemented.
Preferably, as shown in fig. 3, the bending display area 32 includes a first bending display area 321 and a second bending display area 322, and the first bending display area 321 and the second bending display area 322 are respectively located at two ends of the array substrate along the second direction; the at least two switching transistors M include: at least one first switching transistor M1 and at least one second switching transistor M2, wherein a first end of the first switching transistor M1 is electrically connected to a second end of the first data line 51 in the group of data lines 5, and a second end of the first switching transistor M1 is electrically connected to a first end of the second data line 52 in the group of data lines 5, which is electrically connected to the second driving circuit 72 in the first bending display area 321; a first terminal of the second switching transistor M2 is electrically connected to a second terminal of the first data line 51 in the group of data lines 5, and a second terminal of the second switching transistor M2 is electrically connected to a first terminal of a second data line 52 in the group of data lines 5, the second data line being electrically connected to the second driving circuit 72 in a column of the second bending display area 322; wherein the number of first switching transistors M1 is equal to the number of second switching transistors M2. Since the bending display area 32 surrounds the central display area 31, the bending display area 32 includes the first bending display area 321 and the second bending display area 322 in the second direction of the array substrate, in the embodiment of the invention, the second data lines 52 providing data lines for the first bending display area 321 and the second bending display area 322 are respectively short-circuited with the corresponding first data lines 51 providing data signals for the central display area 31 through the first switch transistors M1 and the second switch transistors M2, and the number of the first switch transistors M1 is equal to the number of the second switch transistors M2, so that the frame width of the flexible display panel in the second direction has a small difference.
To better explain the positional relationship between the second data lines 52 and the first data lines 51 in the first bending area and the distribution of the second data lines 52, the first bending display area 321 and the related partial area of the first non-display area 41, the partial area of the second non-display area 42, and the partial area of the central display area 31 are uniformly divided into a D area, as shown in fig. 3.
Preferably, in the D region, when the number of the second data lines 52 providing the data signals to the first bending region is N, N first data lines 51 (i.e. data lines providing the data signals to the central display region 31) should be respectively combined with the data lines 5 of the N second data lines 52 one by one to form N groups of data line groups 5, and then the N first data lines 51 are the N data lines closest to the first bending display region 321 providing the data signals to the central display region 31. For example, as shown in fig. 3, the first bending display area 321 includes three rows of the second driving circuits 72, so that there are three second data lines 52 for providing data signals to the first bending display area 321, and accordingly, there are three first data lines 51 and three data lines 5 of the second data lines 52, and then the three first data lines 51 are the three data lines closest to the first bending display area 321 for providing data signals to the central display area 31, so that the length of the traces in the second data lines 52 in the non-display area is reduced as much as possible, the difference between the load on the second data lines 52 and the load on the first data lines 51 corresponding to the second data lines 52 is reduced, the difference between the display luminance of the sub-pixels in the first bending display area 321 and the central display area 31 is reduced, and the uniformity of the flexible display panel is improved.
Even though the N first data lines 51 are the N data lines closest to the first bending display area 321 for providing the data signals to the central display area 31, when the difference between the lengths of the second data lines 52 in the first bending display area 321 in the non-display area is too large, the difference between the display brightness of each column of sub-pixels in the first bending display area 321 in the first direction is large. Therefore, as shown in fig. 4, in order to make the display luminance difference of each column of sub-pixels in the first bending display area 321 smaller; the direction from the center display area 31 to the central display area 31 in the first bending display area 321 is a third direction, the direction from the center display area 31 to the first bending display area 321 in the first bending display area is also the third direction, the first second data lines 52 in the N second data lines 52 along the third direction form a group of data line groups 5 with the first data lines 51 and data line groups 5 in the N first data lines 51 along the third direction, the second data lines 52 in the N second data lines 52 along the third direction form a group of data line groups 5 with the second first data lines 51 and data line groups 5 in the N first data lines 51 along the third direction, the third data lines 52 in the N second data lines 52 along the third direction form a group of data line groups 5 with the third data line groups 51 and data lines 51 and data line groups 5 in the N first data lines 51 and data line groups 51 and data lines 52 along the third direction. Specifically, as shown in fig. 4, three second data lines 52 are disposed in the first bending display area 321, and a first data line 52 (i.e., the second data line 52 farthest from the central display area 31 in the first bending display area 321) of the three second data lines 52 along the third direction and a first data line 51 (i.e., the first data line 51 closest to the first bending display area 321 in the central display area 31) of the three first data lines 51 along the third direction form a group of data line groups 5; a second data line 52 of the three second data lines 52 along the third direction and a data line group 5 of the second data line 51 of the three first data lines 51 along the third direction form a group of data line groups 5; a third data line 52 (i.e. the second data line 52 closest to the central display area 31 in the first bending display area 321) of the three second data lines 52 and a third data line 51 (i.e. the first data line 51 farthest from the first bending display area 321 in the central display area 31) of the three first data lines 51 in the third direction form a set of data line group 5; in this way, the difference between the distances in the second direction between the first data line 51 and the second data line 52 in each group of data line groups 5 is small, that is, the difference between the routing lengths of the first data line 51 in the non-display area in each group of data line groups is small, so that the display brightness difference of each column of sub-pixels in the first bending display area 321 is small, the brightness difference of each column of sub-pixels in the first bending display area 321 is reduced, and the display brightness difference in the first bending display area 321 is reduced.
The inventors found in further studies that, in the region D, when the second data line 52 supplies the data signal to the corresponding second driving circuit 72 after passing through the R-corner winding in the second non-display region 42, since the second data line 52 is electrically connected to the first data line 51 through the switching transistor M located in the second non-display region 42, when the second data line 52 supplies the data signal to the corresponding column of second driving circuits 72, the data voltage that the second data line 52 initially receives has undergone a second voltage drop, the first voltage drop being the voltage drop of the first data line 51 in the first non-display region 41, and the second voltage drop being the voltage drop of the first data line 51 in the central display region 31. However, when the first data line 51 provides a data signal to the corresponding second driving circuit 72 after passing through the R-corner winding in the first non-display area 41, since the second data line 52 is electrically connected to the first data line 51 through the switching transistor M located in the first non-display area 41, when the second data line 52 provides a data signal to the corresponding column of second driving circuits 72, the data voltage initially received by the second data line 52 only passes through the voltage drop of the first data line 51 in the first non-display area 41, that is, only one voltage drop exists. Therefore, the display luminance of the sub-pixels in a column connected to the second data line 52 passing through the R-angle winding in the second non-display area 42 is different from the display luminance of the sub-pixels in a column connected to the second data line 52 passing through the R-angle winding in the first non-display area 41 (for example, the luminance of the sub-pixels connected to the R-angle winding in the second non-display area 42 is lower), and when two adjacent second data lines 52 pass through the R-angle winding in the second non-display area 42, the width of the first bent display area 321 in the second direction is larger, so that vertical stripes are easily formed, and the display uniformity is reduced. Therefore, as shown in fig. 2 to 4, in the first bending display area 321, the second end of one second data line 52 of two adjacent second data lines 52 is electrically connected to the second end of the first switching transistor M1 disposed in the first non-display area 41; the second end of the other second data line 52 of the two adjacent second data lines 52 is electrically connected to the second end of the first switching transistor M1 disposed in the second non-display area 42, that is, in the first bent display area 321, the one second data line 52 of the two adjacent second data lines 52 is wound from the R corner in the first non-display area 41, and the other second data line 52 of the two adjacent second data lines 52 is wound from the R corner in the second non-display area 42, so that the width of the first bent display area 321 with small continuous display brightness in the second direction is reduced, and the display uniformity is improved.
Preferably, in the D region, when the number of the first switching transistors M1 in the first non-display area 41 or the second non-display area 42 is greater than two, as shown in fig. 3 and 4, the two first switching transistors M1 in the first non-display area 41 are sequentially aligned in the first direction, as shown in fig. 3, or sequentially aligned in the second direction, as shown in fig. 4, and in the manufacturing process of the flexible display panel, the difficulty of the manufacturing process is reduced.
Similarly, the M second data lines 52 in the second bending display area 322 and the M first data lines 51 in the central display area 31 are correspondingly combined to form M groups of data line sets 5 one by one, and the N groups of data line sets 5 are correspondingly combined to form N groups of data line sets 5 one by one between the N second data lines 52 in the first bending display area 321 and the N first data lines 51 in the central display area 31.
It should be understood that the width of the bending region in the flexible display panel in the second direction is much smaller than the width of the central display area 31 in the second direction, and therefore, in addition to the first data line 51, at least one third data line 53 disposed on the array substrate is further included in the central display area 31, a first end of the third data line 53 is electrically connected to the driving chip 6, and a second end of the third data line 53 is electrically connected to a column of the first driving circuit 71, that is, the third data line 53 exists alone, and does not combine with any data line group 5 of the second data line 52 to form a data line group 5.
Regarding the position of the third data line 53 in the central display area 31, that is, the positional relationship between the third data line 53 and the second data line 52, in relation to the number of the third data line 53 and the second data line 52, there may be the following three ways:
(1) A third data line 53 is arranged between every two adjacent second data lines 52;
(2) At least two third data lines 53 are disposed between two adjacent second data lines 52;
(3) All the third data lines 53 are located between two adjacent first data lines 51 that are nearest to each other in the second direction of the array substrate, that is, all the third data lines 53 are located between two adjacent second data lines 52 that are nearest to each other in the second direction, as shown in fig. 2 to 3.
The above description only lists several ways of the arrangement of the position relationship between the third data line 53 and the second data line 52, and does not represent all the arrangement ways, and therefore, the embodiment of the present invention does not limit the position relationship between the third data line 53 and the second data line 52.
In further research, the inventor found that when the data lines for providing data signals to the second driving circuits 72 of the entire bending display area 32 are all the second data lines 52, that is, the number of the data line groups 5 may be equal to the number of the columns of the second driving circuits 72 of the bending display area 32, since the first data lines 51 and the second data lines 52 are shorted by the switching transistors M, the same display signals are simultaneously transmitted to a column of sub-pixels in the central display area 31 and a column of pixels in a column of the bending display area 32, that is, a frame displayed by the sub-pixels in the bending display area 32 is the same as a frame displayed by the column of sub-pixels in the central display area 31, although the width of the bending display area 32 in the second direction is small and the display frame in the bending display area 32 is not important, even though the same frame as that is displayed in the central display area 31, the influence on the user is not normal, which is also the abnormal display mode.
Therefore, in an embodiment of the invention, as shown in fig. 5-8, the number of the data line groups 5 is smaller than the number of the columns of the plurality of second driving circuits 72; the number of the switching transistors M is smaller than the number of columns of the plurality of second driving circuits 72; that is, not all of the data lines in the bend display area 32 are shorted with the data lines in the central display area 31. The flexible display panel further includes: at least one fourth data line 54 disposed on the array substrate in the bending display area 32, wherein a first end of the fourth data line 54 is electrically connected to the driving chip 6, and a second end of the fourth data line 54 is electrically connected to a row of the second driving circuits 72; wherein at least one switching transistor M is disposed in the second non-display region 42. That is, in the embodiment of the present invention, the data line for providing the data signal to the bending display area 32 includes not only the second data line 52 short-circuited with the first data line 51, but also the fourth data line 54 directly electrically connected to the driving chip 6, so that the picture of a part of columns of sub-pixels in the bending display area 32 is normally displayed, and the quality of the display picture in the bending display area 32 is increased, and in addition, at least the switching transistor M is disposed in the second non-display area 42, that is, at least one second data line 52 provides the data signal to the second driving circuit 72 in the bending display area 32 through the R-corner winding in the second non-display area 42, and therefore, the frame width of the flexible display panel can be reduced, and a narrow frame can be realized.
Optionally, the switch transistors M in the second non-display area 42 are respectively distributed at two ends of the array substrate along the second direction; the number of the switching transistors M disposed in the second non-display area 42 and distributed at two ends of the array substrate along the second direction is equal.
Similarly, in order to better explain the positional relationship between the second data line 52, the fourth data line 54, and the first data line 51 in the first bending region and the distribution of the second data line 52 and the fourth data line 54, the first bending display region 321, and the partial region of the first non-display region 41, the partial region of the second non-display region 42, and the partial region of the central display region 31 related thereto are collectively divided into an F region, and the switching transistor M located in the F region is referred to as a first switching transistor M1, as shown in fig. 5.
In the F region, the distribution relationship between the fourth data lines 54 and the second data lines 52 is distributed according to the number of the fourth data lines 54 and the second data lines 52.
In the F region, in the first bending display region 321, when the number of the fourth data lines 54 and the number of the second data lines 52 are both one, the fourth data lines 54 are directly connected to the driving chip 6, and wind around the R corner in the first non-display region 41 to provide data signals for the row of the second driving circuits 72 in the first bending display region 321; the second data line 52 is short-circuited to one first data line 51 through the first switching transistor M1 located in the second non-display region 42, and the second data line 52 provides a data signal for another row of the second driving circuits 72 in the first bending display region 321 after passing through the R-corner winding in the second non-display region 42. At this time, in order to reduce the trace length of the second data line 52 in the non-display area, the distance between the second data line 52 and the central display area 31 in the second direction is smaller than the distance between the fourth data line 54 and the central display area 31 in the second direction, that is, the second data line 52 is closest to the central display area 31, which can reduce the trace length of the second data line 52 in the non-display area, and reduce the difference between the load on the second data line 52 and the load on the first data line 51 corresponding to the second data line 52, so that the difference between the display brightness of the sub-pixels in the first bending display area 321 and the central display area 31 is reduced, and the uniformity of the flexible display panel is improved.
In the F region, in the first bending display region 321, when the number of the second data lines 52 is greater than one, at least one fourth data line 54 is located between two adjacent second data lines 52, as shown in fig. 7, in this case, in the first bending display region 321, there is at least one column of sub-pixels (the sub-pixels are inputted with data signals by the fourth data lines 54) between two adjacent columns of sub-pixels (the two columns of sub-pixels are respectively inputted with data signals by the two adjacent second data lines 52) in the first bending display region 321, and therefore, the display quality in the bending display region 32 is further improved.
Preferably, in the F area and in the first bending display area 321, when the number of the fourth data lines 54 is also greater than one, the fourth data lines 54 in the first bending display area 321 may be located between the second data line 52 closest to the central display area 31 and the central display area 31, so as to reduce the routing length of the fourth data lines 54 in the non-display area, reduce the difference between the load on the fourth data lines 54 and the load on the data lines (for example, the third data line 53 or the first data line 51) providing the data signals in the central display area 31, reduce the difference between the display luminance of the sub-pixels in the first bending display area 321 and the central display area 31, and improve the uniformity of the flexible display panel.
The fourth data lines 54 in the first bending display area 321 may also be located between the second data lines 52 farthest from the central display area 31 and the non-display area. In any case, the trace length of the second data line 52 in the first bending display area 321 in the non-display area is relatively reduced, and the difference between the load on the second data line 52 and the load on the first data line 51 corresponding to the second data line 52 is reduced, so that the display brightness difference between the sub-pixels of the first bending display area 321 and the central display area 31 is reduced, and the uniformity of the flexible display panel is improved.
The fourth data lines 54 in the first bending display area 321 may also be spaced apart from the second data lines 52 (i.e., the second data lines 52 are disposed between two adjacent fourth data lines 54), as shown in fig. 8. That is, the first bending display area 321 is arranged at intervals of multiple rows of sub-pixels capable of displaying a normal picture, so that the picture quality in the first bending display area 321 is improved.
All the fourth data lines 54 in the first bending display area 321 may also be disposed between two adjacent second data lines 52.
In the F region, in the first bend display region 321, an absolute value of a difference between the number of the fourth data lines 54 and the number of the second data lines 52 is less than or equal to one. I.e. the number of fourth data lines 54 is either equal to the number of second data lines 52 or the absolute value of the difference is equal to one. That is, when the number of columns of the second driving circuits 72 in the first bending display area 321 is an even number of columns, the number of the fourth data lines 54 is equal to the number of the second data lines 52, and when the number of columns of the second driving circuits 72 in the first bending display area 321 is an odd number of columns, the absolute value of the difference between the number of the fourth data lines 54 and the number of the second data lines 52 is equal to one. In this case, the fourth data line 54 and the third data line 53 can be equally divided as much as possible, so that the width of the frame can be reduced and the quality of the display screen in the first bend display area 321 can be improved.
Optionally, all the second data lines 52 are electrically connected to the row of second driving circuits 72 in the first bending display area 321 after passing through the R-corner winding in the second non-display area 42, as shown in fig. 6, that is, all the first switching transistors M1 are located in the second non-display area 42, that is, the number of the fourth data lines 54 bypassing the R-corner in the first non-display area 41 is balanced with the number of the second data lines 52 bypassing the R-corner in the second non-display area 42 to the maximum extent, so that the width of the frame can be reduced to the maximum extent.
It should be understood that when the number of the fourth data lines 54 is equal to the number of the second data lines 52, or the number of the fourth data lines 54 is one more than the number of the second data lines 52, all the second data lines 52 must bypass the R corner in the second non-display region 42 to maximally reduce the width of the bezel. However, when the number of the fourth data lines 54 is one less than the number of the second data lines 52, the width of the bezel can be reduced to the maximum extent when there is one second data line 52 bypassing the R corner in the first non-display region 41, as shown in fig. 7.
Similarly, the number and the position distribution manner between the second data lines 52 and the fourth data lines 54 in the second bending display area 322 are the same as those between the second data lines 52 and the fourth data lines 54 in the first bending display area 321, and are not repeated herein.
In addition, in further research by the inventor, when the driving chip 6 provides data signals to the central display area 31 and the bending display area 32 in the flexible display panel, the length of the data line providing the data signal to the central display area 31 in the non-display area is far greater than the length of the data line providing the data signal to the bending display area 32 in the non-display area, and the square resistance of the metal wire in the non-display area is greater than that of the metal wire in the display area due to the different arrangement of the metal wire in the non-display area and the display area, so that the attenuation of Vdata after the data line transmission is greater than that of the data line in the non-display area, and therefore, the brightness of the bending display area 32 is different from that of the central display area 31, so that the brightness of the central display area 31 in the bending display area 32 is not uniform.
Therefore, as another aspect of the present invention, an embodiment of the present invention provides a display device, including a flexible display panel and a controller, wherein a structure of the flexible display panel adopts a structure of the flexible display panel as described above; the controller provides a first scanning control signal Scan1 for the switching transistor; as shown in fig. 9-11, during the first time period T1, the controller applies the first Scan control signal Scan1 with the first voltage amplitude to the gate of the switching transistor M, so that the switching transistor M is turned off, that is, the driving chip 6 provides the data signal voltage Vdata1 to the first data line 51 in each group of data lines, at this time, because the switching transistor M is turned off, the second data line 52 in each group of data lines is disconnected from the first data line 51, that is, no data voltage is transmitted on the second data line 52, that is, during the first time period T1, the central display area 31 displays data, and the bending display area 32 does not display data.
In the second period T2, the controller applies the first Scan control signal Scan1 having the second voltage amplitude to the gate of the switching transistor M to turn on the switching transistor M. At this time, since the switching transistor M is turned on, the second data line 52 in each group of data lines is electrically connected to the first data line 51, that is, the driving chip 6 provides the data signal voltage Vdata2 to the first data line 51 and the second data line 52 in each group of data lines, that is, in the second time period T2, the central display region 31 and the bending display region 32 both display. In the prior art, the data lines in the bending display area 32 and the data lines in the central display area 31 simultaneously obtain data voltages from the driving chip 6, and the initial data voltages obtained between the data lines in the bending display area 32 and the data lines in the central display area 31 are the same and can not be changed, so that the difference between the data voltages finally reaching the sub-pixels is large due to different voltage losses in the voltage transmission process, and the display brightness of the central display area 31 is different from that of the bending display area 32. In the embodiment of the present invention, since the input initial voltage is Vdata2 when the bending display region 32 displays, and the input initial voltage is Vdata1 when the central display region 31 displays for the first time, the difference between the data voltages finally reaching the sub-pixels of the central display region 31 and the sub-pixels of the bending display region 32 can be reduced by adjusting the voltage values of Vdata1 and Vdata2, so that the luminance difference between the central display region 31 and the bending display region 32 is reduced, and the display uniformity of the flexible display panel is improved.
It should be understood that the magnitude between the first voltage amplitude and the second voltage amplitude may be selected according to the type of the switching transistor M, for example, when the type of the switching transistor M is P-type, i.e., at a low level, the switching transistor M is turned on, and when the type of the switching transistor M is at a high level, the switching transistor M is turned off, the first time period T1 is at a high level, and the second time period T2 is at a low level, i.e., the first voltage amplitude is at a high level and the second voltage amplitude is at a low level.
In an embodiment of the present invention, the sum of the first time period T1 and the second time period T2 is equal to one frame of the display time, i.e. T1+ T2= T One frame . Since the bending display area 32 is not displayed at the first time T1, in order to reduce the non-display time of the bending display area 32, the first time period T1 and the second time period T2 are set within the time of one frame of display screen, and since the refresh frequency is higher, the time of each frame of display screen is smaller, even if the bending display area 32 is not displayed within the first time period T1, the non-display time of the bending display area 32 is smaller, and the use of a user is not affected under the condition that the display brightness difference between the central display area 31 and the bending display area 32 can be reduced.
Optionally, the number of the first time periods T1 may be one, and the number of the second time periods T2 is one, as shown in fig. 9.
Optionally, the number of the first time periods T1 may also be greater than one, and the number of the second time periods T2 may also be greater than one, as shown in fig. 10. That is to say, within one frame of display time, the plurality of first time periods T1 and the plurality of second time periods T2 are set at intervals, and within one frame of display time, the time that the bending display area 32 does not display is divided into the plurality of time periods, so that the influence on the user due to the fact that the bending display area 32 does not display can be further reduced.
Optionally, when both the number of the first time periods T1 and the number of the second time periods T2 are greater than one, the number of the first time periods T1 is equal to the number of the second time periods T2, in this case, in one frame of the display image, the display and display stages in the bending display area 32 are equal, and while the display brightness difference between the central display area 31 and the bending display area 32 is reduced, the display time of the bending display area 32 can be made longer, and the influence on the user when the bending display area 32 is not displayed is reduced as much as possible.
In the prior art, the display content in the bending display area 32 is usually simple information such as time, notification, signal, power, volume adjustment, etc., and the refresh frequency requirement of the display is low. Therefore, in another embodiment of the present invention, as shown in fig. 11, the first time T1 is equal to the sum of the display times of N frames of consecutive pictures, and the second time is equal to the sum of the display times of M frames of consecutive pictures, where N is an integer greater than one, and M is an integer greater than one, for example, the first time T1 is equal to the sum of the display times of 90 frames of consecutive pictures, and the second time period is equal to the sum of the display times of 10 frames of consecutive pictures. That is, after the central display area 31 displays N frames of continuous pictures, the bending display area 32 displays M frames of continuous pictures, because the durations of the first time period T1 and the second time period T2 are both greater than or equal to T In the case of one frame, the frame is, therefore, when the controller controls the switching of the whole T1 phase and the T2 phase, the control is easier.
Optionally, N is greater than M, and when N is greater than M, it is easier to control the switching between the first time period T1 and the second time period T2, but the overall refresh frequency of the central display area 31 is greater than the overall refresh frequency of the bending display area 32, and then the refresh frequency of the bending display area 32 is lower than the refresh frequency of the central display area 31, so that the user experience is not affected when the switching between the first time period T1 and the second time period T2 is easier to implement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (18)
1. A flexible display panel, comprising:
the flexible display panel comprises an array substrate, wherein the flexible display panel comprises a display area and a non-display area surrounding the display area, the display area comprises a bent display area and a central display area, the non-display area comprises a first non-display area and a second non-display area, and the first non-display area and the second non-display area are respectively positioned at two ends of the array substrate along a first direction;
the driving chip is arranged in the first non-display area;
a plurality of first driving circuits arranged on the array substrate and distributed in a first array in the central display area, wherein the column direction in the first array is the first direction;
a plurality of second driving circuits arranged on the array substrate and distributed in a second array in the bending display area, wherein the row direction in the second array is the first direction; the bending display area comprises a first bending display area, and the first bending display area is positioned at one end of the array substrate along a second direction;
at least one group of data line groups arranged on the array substrate, wherein each data line group comprises a first data line positioned in the central display area and a second data line positioned in the bent display area, the first end of each first data line is electrically connected with the driving chip, the second end of each first data line is electrically connected with a row of first driving circuits, and the second end of each second data line is electrically connected with a row of second driving circuits; and
at least one switching transistor disposed in the non-display area, a control terminal of the switching transistor receiving a first scan control signal, a first terminal of the switching transistor being electrically connected to a second terminal of the first data line in a group of the data line groups, a second terminal of the switching transistor being electrically connected to a first terminal of the second data line in a group of the data line groups;
wherein the switching transistor includes: a first switching transistor disposed in the first non-display region and the second non-display region, respectively;
in the first bending display area, a second end of one of the second data lines in two adjacent second data lines is electrically connected with a second end of the first switch transistor arranged in the first non-display area, and a second end of the other of the second data lines in two adjacent second data lines is electrically connected with a second end of the first switch transistor arranged in the second non-display area.
2. The flexible display panel according to claim 1, wherein the number of the data line groups is equal to the number of columns of the plurality of second driving circuits; the number of the switching transistors is equal to the number of columns of the plurality of second driving circuits.
3. The flexible display panel according to claim 2, wherein the bend display region further comprises a second bend display region located at the other end of the array substrate along the second direction;
the switching transistor further includes: a second switching transistor disposed in the first non-display region and the second non-display region, respectively;
a first end of the first switch transistor is electrically connected with a second end of the first data line in a group of data line groups, and a second end of the first switch transistor is electrically connected with a first end of the second data line in the data line groups, wherein the first end of the second data line is electrically connected with a column of the second driving circuits in the first bending display area;
a first end of the second switch transistor is electrically connected with a second end of the first data line in a group of data lines, and a second end of the second switch transistor is electrically connected with a first end of the second data line in the group of data lines, which is electrically connected with a row of the second driving circuits in the second bending display area;
wherein the number of the first switching transistors is equal to the number of the second switching transistors.
4. The flexible display panel of claim 3,
in the second bending display area, a second end of one second data line in two adjacent second data lines is electrically connected with a second end of the second switch transistor arranged in the first non-display area;
a second terminal of the second data line of the other of the two adjacent second data lines is electrically connected to a second terminal of the second switching transistor disposed in the second non-display region.
5. The flexible display panel of claim 1, further comprising:
and in the central display area, at least one third data line is arranged on the array substrate, the first end of the third data line is electrically connected with the driving chip, and the second end of the third data line is electrically connected with a row of the first driving circuits.
6. The flexible display panel according to claim 5, wherein at least one of the third data lines is located between two adjacent first data lines.
7. The flexible display panel according to claim 5, wherein all the third data lines are located between two adjacent first data lines closest to each other in the second direction of the array substrate.
8. The flexible display panel of claim 1, wherein the number of data line groups is less than the number of columns of the plurality of second driving circuits; the number of the switch transistors is less than the number of columns of the second driving circuits; the flexible display panel further includes:
at least one fourth data line arranged on the array substrate in the bending display area, wherein a first end of the fourth data line is electrically connected with the driving chip, and a second end of the fourth data line is electrically connected with a row of the second driving circuits;
wherein at least one of the switching transistors is disposed in the second non-display region.
9. The flexible display panel according to claim 8, wherein the bending display regions include a first bending display region and a second bending display region, and the first bending display region and the second bending display region are respectively located at two ends of the array substrate along a second direction;
in the first bending display area, the number of the second data lines is more than one,
at least one fourth data line is positioned between two adjacent second data lines.
10. The flexible display panel according to claim 8, wherein the bending display regions comprise a first bending display region and a second bending display region, and the first bending display region and the second bending display region are respectively located at two ends of the array substrate along a second direction;
in the first bending display area, all the fourth data lines are positioned between the second data line closest to the central display area and the central display area.
11. The flexible display panel according to claim 8, wherein the bending display regions include a first bending display region and a second bending display region, and the first bending display region and the second bending display region are respectively located at two ends of the array substrate along a second direction;
in the first bending display area, the absolute value of the difference between the number of the fourth data lines and the number of the second data lines is less than or equal to one.
12. The flexible display panel according to claim 11, wherein all the switching transistors are provided in the second non-display region.
13. The flexible display panel according to claim 12, wherein the switching transistors disposed in the second non-display region are respectively distributed at two ends of the array substrate along the second direction;
the number of the switching transistors which are arranged in the second non-display area and distributed at two ends of the array substrate along the second direction is equal.
14. A display device, comprising:
a flexible display panel having a structure of the flexible display panel according to any one of claims 1 to 13; and
a controller providing a first scan control signal to the switching transistor;
wherein the controller applies a first scan control signal having a first voltage amplitude to the gate of the switching transistor to turn off the switching transistor for a first period;
the controller applies a first scan control signal having a second voltage amplitude to the gate of the switching transistor to turn on the switching transistor for a second period.
15. The display device according to claim 14, wherein the number of the first periods is greater than or equal to one, the number of the second periods is greater than or equal to one, at least one of the first periods is arranged to intersect with at least one of the second periods, and a sum of all of the first periods and all of the second periods is equal to one frame display time.
16. The display device according to claim 15, wherein the number of the first periods is equal to the number of the second periods.
17. The display device according to claim 14, wherein the first time is equal to a sum of display times of N frames of consecutive pictures, and the second time is equal to a sum of display times of M frames of consecutive pictures, where N is an integer greater than one, and M is an integer greater than one.
18. The display device according to claim 17, wherein N is greater than M.
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| CN111768713B (en) * | 2020-07-31 | 2022-01-14 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113257121B (en) * | 2021-03-29 | 2023-04-07 | 北海惠科光电技术有限公司 | Display device, manufacturing method thereof and splicing display device |
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| CN109952555B (en) * | 2017-08-31 | 2021-07-20 | 华为技术有限公司 | Display screen and mobile terminal |
| KR102626514B1 (en) * | 2017-10-31 | 2024-01-17 | 엘지디스플레이 주식회사 | Display apparatus |
| CN108681177B (en) * | 2018-06-21 | 2023-09-01 | 上海天马微电子有限公司 | Array substrate, electronic paper display panel, driving method of electronic paper display panel and display device |
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