CN112684931B - Display panel and display device - Google Patents
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- CN112684931B CN112684931B CN202011587827.9A CN202011587827A CN112684931B CN 112684931 B CN112684931 B CN 112684931B CN 202011587827 A CN202011587827 A CN 202011587827A CN 112684931 B CN112684931 B CN 112684931B
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Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises: the public electrode layer comprises a plurality of public electrodes which are arranged in an array and are insulated from each other; a control circuit; a driving circuit; the common signal line layer comprises a plurality of common signal lines which are positioned between the control circuit and the driving circuit and are used for transmitting common voltage signals to the common electrode, the common signal lines comprise first common signal lines, and the first common signal lines comprise first signal line segments and second signal line segments in the self extending direction; one end of the first signal line segment is electrically connected with the control circuit, and the other end of the first signal line segment is electrically connected with the public electrode through the via hole; one end of the second signal line segment is electrically connected with the driving circuit, the other end of the second signal line segment is electrically connected with the public electrode through the via hole, and the first signal line segment and the second signal line segment of the same first public signal line are respectively electrically connected with different public electrodes, so that the potential recovery capability of the public electrode is improved.
Description
Technical Field
The invention belongs to the technical field of electronic products, and particularly relates to a display panel and a display device.
Background
In recent years, touch technology is increasingly applied to display devices with various sizes, and a touch display panel is used as a display panel of a novel man-machine interaction input mode, so that compared with the traditional modes of display, keyboard and mouse input, the touch screen input is simpler, more direct and more convenient.
In the prior art, the common electrode electrical connection as the touch electrode has the risk of the common electrode pattern being visible due to process limitations.
Therefore, a new display panel and display device are needed.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which increase the number of through holes corresponding to at least part of common electrodes by arranging a first signal line segment and a second signal line segment, thereby improving the potential recovery capability of the common electrodes.
In a first aspect, an embodiment of the present invention provides a display panel, including: the public electrode layer comprises a plurality of public electrodes which are arranged in an array and are insulated from each other; a control circuit for providing a common voltage signal to the common electrode; the driving circuit is used for providing a common voltage signal for the common electrode and controlling the on-off of the control circuit; a common signal line layer insulated from and laminated with the common electrode layer, the common signal line layer including a plurality of common signal lines extending between the control circuit and the driving circuit, the common signal lines for transmitting the common voltage signal to the common electrode, the common signal lines including a first common signal line including a first signal line segment and a second signal line segment in a direction of extending itself, the first signal line segment and the second signal line segment of the same first common signal line being insulated from each other; one end of the first signal line segment is electrically connected with the control circuit, and the other end of the first signal line segment is electrically connected with the public electrode through a via hole; one end of the second signal line segment is electrically connected with the driving circuit, the other end of the second signal line segment is electrically connected with the public electrode through the via hole, and the first signal line segment and the second signal line segment of the same first public signal line are respectively electrically connected with different public electrodes.
In a second aspect, an embodiment of the present invention provides a display apparatus, including: and the display panel is the display panel in any embodiment.
Compared with the related art, the display panel provided by the embodiment of the invention comprises the public electrode layer, the control circuit, the driving circuit and the public signal line layer, wherein the public signal line layer comprises a public signal line for transmitting public signals to the public electrode, the first public signal line of the public signal line comprises a first signal line segment and a second signal line segment, the first signal line segment is used for electrically connecting the control circuit and the public electrode, the second signal line segment is used for electrically connecting the driving circuit and the public electrode, and the first signal line segment and the second signal line segment can both transmit public voltage signals to the public electrode so as to realize the luminous display function of the display panel. Because the first signal line segment and the second signal line segment are electrically connected with each public electrode through the through holes, the number of the through holes corresponding to at least part of the public electrodes can be increased by arranging the first signal line segment and the second signal line segment, namely, the signal quantity of the public voltage signals received by the public electrodes in unit time is increased, and the potential recovery capability of the public electrodes is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic structural view of a display panel according to an embodiment of the present invention;
FIG. 2 is a diagram of the structure of the membrane layer at A-A in FIG. 1;
fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
fig. 4 is a schematic structural view of a display panel according to still another embodiment of the present invention;
fig. 5 is a schematic structural view of a display panel according to still another embodiment of the present invention;
fig. 6 is a schematic structural view of a display panel according to still another embodiment of the present invention;
fig. 7 is a schematic structural view of a display panel according to still another embodiment of the present invention;
fig. 8 is a schematic structural view of a display panel according to still another embodiment of the present invention;
fig. 9 is a schematic structural view of a display panel according to still another embodiment of the present invention;
fig. 10 is a schematic structural view of a display panel according to still another embodiment of the present invention;
FIG. 11 is a timing diagram of driving a display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural view of a display panel according to still another embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
For a better understanding of the present invention, a display panel and a display device according to embodiments of the present invention are described in detail below with reference to fig. 1 to 12.
Referring to fig. 1 to 2, fig. 1 is a display panel according to an embodiment of the invention, including: the common electrode layer 1 comprises a plurality of common electrodes 10, and the plurality of common electrodes 10 are arranged in an array and are insulated from each other; a control circuit 2 for supplying a common voltage signal to the common electrode 10; the driving circuit 3 is used for providing a common voltage signal for the common electrode 10 and controlling the on-off of the control circuit 2; a common signal line layer 4 insulated from and laminated with the common electrode layer 1, the common signal line layer 4 including a plurality of common signal lines extending between the control circuit 2 and the driving circuit 3, the common signal lines for transmitting a common voltage signal to the common electrode 10, the common signal lines including a first common signal line 41, the first common signal line 41 including a first signal line segment 411 and a second signal line segment 412 in a direction of extending itself, the first signal line segment 411 and the second signal line segment 412 of the same first common signal line 41 being insulated from each other; one end of the first signal line segment 411 is electrically connected with the control circuit 2, and the other end is electrically connected with the common electrode 10 through the via hole 5; one end of the second signal line segment 412 is electrically connected to the driving circuit 3, and the other end is electrically connected to the common electrode 10 through the via hole 5, and the first signal line segment 411 and the second signal line segment 412 of the same first common signal line 41 are electrically connected to different common electrodes 10, respectively.
The display panel provided by the embodiment of the invention comprises a common electrode layer 1, a control circuit 2, a driving circuit 3 and a common signal line layer 4, wherein the common signal line layer 4 comprises a common signal line for transmitting a common signal to a common electrode 10, a first common signal line 41 of the common signal line comprises a first signal line segment 411 and a second signal line segment 412, the first signal line segment 411 is used for electrically connecting the control circuit 2 and the common electrode 10, the second signal line segment 412 is used for electrically connecting the driving circuit 3 and the common electrode 10, and the first signal line segment 411 and the second signal line segment 412 can both transmit a common voltage signal to the common electrode 10 so as to realize the luminous display function of the display panel.
In the related art, each common signal line can be electrically connected to only one common electrode 10 through the via holes 5, but is affected by the shape, arrangement and aperture ratio of the common electrodes 10, and the number of common signal lines to which each common electrode 10 can be electrically connected and the number of via holes 5 corresponding to each common signal line are limited. The number of the vias 5 affects the transmission speed of the common voltage signal, and since the number of the vias 5 corresponding to each common electrode 10 is limited, the signal transmission speed for each common electrode 10 is slower, especially in the case of high frequency, the refresh frequency of the common voltage signal is high, so that the recovery time of the common electrode 10 is short, the potential of the common electrode 10 cannot be recovered in time, and the common electrode 10 has the risk that the potential cannot be recovered and the pattern is visible.
In the display panel provided by the embodiment of the invention, since the first signal line segment 411 and the second signal line segment 412 are electrically connected with each common electrode 10 through the via holes 5, the number of the via holes 5 corresponding to at least part of the common electrodes 10 can be increased by setting the first signal line segment 411 and the second signal line segment 412, that is, the signal quantity of the common voltage signal received by the common electrodes 10 in unit time is increased, the potential recovery capability of at least part of the common electrodes 10 is improved, the potential recovery uniformity of the common electrodes 10 of the display panel is further improved, and the problem that the potential cannot be recovered or the pattern is visible is prevented from being generated by the common electrodes 10.
In order to facilitate wiring and avoid interference with other components, the control circuit 2 and the driving circuit 3 may be provided on both sides of the common electrode layer 1, respectively, and are not particularly limited as long as they can be electrically connected to the common electrode 10.
Specifically, the common signal line layer 4 is insulated from the common electrode layer 1 and is stacked, that is, the common signal line layer 4 and the common electrode layer 1 are insulated from each other, and are not directly and integrally connected electrically, but the common signal line of the common signal line layer 4 is electrically connected with the common electrode 10 of the common electrode layer 1 through a via hole, the common signal line layer 4 and the common electrode layer 1 are stacked up and down, as shown in fig. 2, the common signal line layer 4 is arranged above the common signal line layer 4, and the common signal line layer 4 and the common electrode layer 1 are separated and insulated by the insulating layer 6.
It can be understood that the first common signal line 41 includes a first signal line segment 411 and a second signal line segment 412 in the extending direction thereof, the first signal line segment 411 and the second signal line segment 412 of the same first common signal line 41 are insulated from each other, specifically, an insulating material can be disposed between the first signal line segment 411 and the second signal line segment 412 for insulation, the first common signal line 41 can be broken at a certain position after the first common signal line 41 is formed to form the first signal line segment 411 and the second signal line segment 412, or a signal line segment and the second signal line segment 412 which are not electrically connected with each other can be directly formed, so that the process is simpler. The first signal line segment 411 and the second signal line segment 412 of the same first common signal line 41 are electrically connected to different common electrodes 10, respectively, that is, the first signal line segment 411 and the second signal line segment 412 of the same first common signal line 41 do not provide the common voltage signal V1 to the same common electrode 10, due to the relative positions of the first signal line segment 411 and the second signal line segment 412. Specifically, the first signal line segment 411 and the second signal line segment 412 may transmit the common voltage signal V1 to two common electrodes 10 adjacent in the self-extending direction, respectively.
Referring to fig. 3, in some alternative embodiments, each common signal line is a first common signal line 41. Specifically, since each common signal line includes the first signal line segment 411 and the second signal line segment 412, the common electrode 10 is electrically connected with the first signal line segment 411 and/or the second signal line segment 412 through the via hole 5, that is, the signal quantity of the common voltage signal received by the common electrode 10 in unit time is increased, the potential recovery capability of each common electrode 10 is improved, further, the potential recovery uniformity of the common electrode 10 of the display panel is improved, and the problem that the potential cannot be recovered or the pattern is visible due to each common electrode 10 is solved.
As shown in fig. 3, in some alternative embodiments, the display panel includes m rows and n columns of common electrodes 10 arranged in an array, and in a column of common electrodes 10 in which common signal lines electrically connected to the common electrodes 10 are first common signal lines 41, the 1 st common electrode 10 is electrically connected to at least two first signal line segments 411 in a direction from the control circuit 2 to the driving circuit 3; the mth common electrode 10 is electrically connected with at least two second signal line segments 412; the 2 nd to (m-1) th common electrodes 10 are electrically connected to at least one first signal line segment 411 and at least one second signal line segment 412; wherein m is greater than or equal to 3, n is greater than or equal to 1, and m and n are integers.
Note that the common electrodes 10 are arranged in an array of m rows and n columns, that is, in a matrix arrangement, and m common electrodes 10 are included in one column of common electrodes 10. In at least one row of common electrodes 10, the common signal lines corresponding to the common electrodes 10 are all first common signal lines 41, in the row of common electrodes 10, in the direction from the control circuit 2 to the driving circuit 3, the 1 st common electrode 10 is electrically connected with at least two first signal lines, the 1 st common electrode 10 is the common electrode 10 closest to the control circuit 2 in the row of common electrodes 10, the 1 st common electrode 10 is electrically connected with at least two first signal line segments 411, and as the first signal line segments 411 are electrically connected with the control circuit 2, the 1 st common electrode 10 and the first signal line segments 411 are electrically connected, the signal transmission distance can be effectively reduced, and the signal transmission quality is ensured.
Similarly, the mth common electrode 10 is the common electrode 10 closest to the driving circuit 3, the mth common electrode 10 is electrically connected with at least two second signal line segments 412, and the second signal line segments 412 are electrically connected to the driving circuit 3, so that the transmission distance between the driving circuit 3 and the mth common electrode 10 can be reduced. And 2 to (m-1) common electrodes 10 located between the 1 st and m-th are electrically connected to at least one first signal line segment 411 and at least one second signal line segment 412.
Referring to fig. 4 to 6, in some alternative embodiments, the common signal lines include a second common signal line 42 in addition to the first common signal line 41, one end of the second common signal line 42 is electrically connected to the control circuit 2, the other end is electrically connected to the driving circuit 3, the second common signal line 42 is electrically connected to the common electrode 10 through the via hole 5, and each of the second common signal lines 42 is electrically connected to one of the common electrodes 10.
It can be understood that, compared with the first common signal line 41, the second common signal line 42 is a whole segment, and both ends thereof are electrically connected to the control circuit 2 and the driving circuit 3, respectively, and are electrically connected to the common electrode 10 through the via hole 5, so as to transmit the common voltage signal V1 of the control circuit 2 and the driving circuit 3 to the common electrode 10 together, thereby improving the driving capability of the common electrode 10. It should be noted that, each of the second common signal lines 42 may be electrically connected to only one common electrode 10, but not both of the common electrodes 10 at the same time, so as to ensure normal transmission of the common voltage signal V1, and each of the common electrodes 10 may be electrically connected to a plurality of the second common signal lines 42 or the first common signal lines 41, and is not particularly limited, and may be selected according to the size and shape of the common electrode 10. Specifically, as shown in fig. 4, one column of common electrodes 10 is electrically connected to one first common signal line 41, and three second common signal lines 42 are electrically connected; as shown in fig. 5, one column of common electrodes 10 is electrically connected to two first common signal lines 41; as shown in fig. 6, one column of the common electrode 10 and three first common signal lines 41 are electrically connected.
Optionally, the common signal line further includes a third common signal line (not shown in the figure), one end of which is electrically connected to one of the control circuit 2 and the driving circuit 3, and the other end of which is electrically connected to the common electrode 10 through the via hole 5.
Referring to fig. 5 or fig. 7, in order to avoid that the local via 5 has too high a packing density, it can be seen that, in some alternative embodiments, the via 5 corresponding to each of the first signal line segment 411 and the second signal line segment 412 electrically connected to the same common electrode 10 is staggered along the extending direction perpendicular to the first common signal line 41.
It should be noted that, the via holes 5 corresponding to the first signal line segment 411 and the second signal line segment 412 electrically connected to the same common electrode 10 are staggered, so that the via holes 5 are distributed more uniformly, and the situation that the local via holes 5 have too high stacking density and are displayed visually is avoided when the number of the via holes 5 is large. Similarly, when the common electrode 10 and the second common signal line 42 are also electrically connected through the via holes 5, the arrangement positions of the respective via holes 5 corresponding to the common electrode 10 may also be staggered in the extending direction perpendicular to the first common signal line 41.
Referring to fig. 7 and 8, in order to reduce the signal transmission distance and improve the signal transmission quality, in some alternative embodiments, the display panel includes m rows and n columns of common electrodes 10 arranged in an array, the common electrodes 10 are in a block shape, and the orthographic projection areas of the common electrodes 10 on the common signal line layer 4 are equal; the position of the first signal line segment 411 and the second signal line segment 412 of the first common signal line 41, which are insulated from each other, is the first broken line position d; in the column of common electrodes 10 electrically connected to the first common signal line 41, in a direction directed from the control circuit 2 to the driving circuit 3: when m is an even number, the total number of d at the first broken lines between the 1 st to m/2 th common electrodes 10 is A1, and the total number of d at the first broken lines between the (m/2+1) th to m common electrodes 10 is A2, A2 > A1; when m is an odd number, the total number of d at the first break lines between the 1 st to the ((m-1)/2+1) th common electrodes 10 is A1, and the total number of d at the first break lines between the ((m-1)/2+1) th to m common electrodes 10 is A2, A2 > A1.
For convenience of arrangement, the common electrode 10 may be in a block shape, specifically, a rectangular block or a diamond shape. The orthographic projection areas of the respective common electrodes 10 on the common signal line layer 4 are equal, that is, the size and shape of each common electrode 10 are the same. The position where the first signal line segment 411 and the second signal line segment 412 of the first common signal line 41 are insulated from each other is set as a first broken line position d, and the first signal line segment 411 and the second signal line segment 412 are not electrically connected at the first broken line position d in a broken state, that is, a certain interval is provided between the first signal line segment 411 and the second signal line segment 412, and the first signal line segment 411 and the second signal line segment 412 are separated by the interval. Each of the first common signal lines 41 has a first disconnection d.
A row of common electrodes 10 electrically connected to the first common signal line 41, specifically, at least one common electrode 10 and the first common signal line 41 are electrically connected in the row of common electrodes 10, and in the row of common electrodes 10, in a direction directed from the control circuit 2 to the driving circuit 3: when m is an even number, the total number of d at the first breaks between the 1 st to m/2 th common electrodes 10 is A1, and the total number of d at the first breaks between the (m/2+1) th to m common electrodes 10 is A2, A2 > A1. For example, as shown in fig. 7, when m is equal to 4, the total number of d at the first break between the 1 st and 2 nd common electrodes 10 is A1, the total number of d at the first break between the 3 rd and 4 th common electrodes 10 is A2, and A2 > A1, i.e., the number of d at the first break near the driving circuit 3 is greater.
When m is an odd number, the total number of d at the first break between the 1 st to the ((m-1)/2+1) th common electrodes 10 is A1 greater than the total number of d at the first break between the ((m-1)/2+1) th to m common electrodes 10 A2, for example, when m=3, the total number of d at the first break between the 1 st to (m-1)/2+1) th common electrodes 10, i.e., the 1 st and 2 nd common electrodes 10 is A1, and the total number of d at the first break between the 2 nd and 3 rd common electrodes 10 is A2, A2 > A1, as shown in fig. 8. Similarly, when m takes other values, the magnitude relationship of A1 and A2 is the same to ensure that the number of d is greater at the first break near the drive circuit 3. The common signal line is electrically connected to the common electrode 10 through the via hole 5, and since the driving capability of the driving circuit 3 is stronger than that of the control circuit 2, the signal of the driving circuit 3 can be more quickly transmitted to the common electrode 10 electrically connected thereto. Therefore, the first broken line d close to the driving circuit 3 is preferentially broken, so that the common electrode 10 below the first broken line d can quickly receive signals in the direction from the control circuit 2 to the driving circuit 3, and the uniformity of the received signals of the common electrode 10 is ensured.
In addition, in the direction of pointing to the driving circuit 3 from the control circuit 2 due to the disconnection at the position close to the driving circuit 3, the length of the second signal line segment 412 connected with the common electrode 10 below the first disconnection d is relatively small, and the signal can be quickly transmitted to the common electrode 10 below the first disconnection d, so that on the basis of ensuring the reduction of the graphic visibility risk of the common electrode 10, the signal transmission difference between the common electrodes 10 is further reduced by improving the quality of the signal received by the common electrode 10 below the first disconnection d, and the uniformity of the signal received by the common electrodes 10 of the display panel is improved.
Referring to fig. 9, in some alternative embodiments, the common electrode 10 includes a shaped common electrode 11 and a regular common electrode 12, where the shaped common electrode 11 is disposed at least around a portion of the regular common electrode 12, and the orthographic projection area of the shaped common electrode 11 on the common signal line layer 4 is smaller than the orthographic projection area of the regular common electrode 12 on the common signal line layer 4; in a column of common electrodes including the shaped common electrode 11 and electrically connected to the first common signal line 41, the number of vias 5 electrically connected between one shaped common electrode 11 and the common signal line is smaller than the number of vias 5 electrically connected between one regular common electrode 12 and the common signal line.
The common electrode 10 includes a shaped common electrode 11 and a regular common electrode 12, and the shaped common electrode 11 is generally disposed at a corner of the display panel to match the shape of the display panel. Specifically, the special-shaped common electrode 11 is at least arranged around part of the regular common electrode 12, and the orthographic projection area of the special-shaped common electrode 11 on the common signal line layer 4 is smaller than the orthographic projection area of the regular common electrode 12 on the common signal line layer 4, the regular common electrode 12 can specifically be in a rectangular shape or the like, and the special-shaped common electrode 11 can specifically be in a quarter circle shape or other fan shape or the like.
In order to ensure display uniformity of the display panel, among a column of common electrodes including the shaped common electrode 11 and electrically connected to the first common signal line 41, specifically, the shaped common electrode 11 is included in the column of common electrodes 10, and at least one common electrode 10 is electrically connected to the first common signal line 41. The number of the through holes 5 electrically connected between one special-shaped common electrode 11 and the common signal line is smaller than that of the through holes 5 electrically connected between one regular common electrode 12 and the common signal line, and it can be understood that the larger the number of the through holes 5 is, the faster the signal transmission speed is, the stronger the potential recovery capability of the common electrode 10 is, and the front projection area of the special-shaped common electrode 11 on the common signal line layer 4 is smaller than that of the regular common electrode 12 on the common signal line layer 4, so that the special-shaped common electrode 11 needs to achieve the same potential recovery capability as that of the regular common electrode 12, the fewer holes are required, and the potential recovery uniformity and consistency of each common electrode 10 of the display panel are ensured.
Referring to fig. 10, in order to improve uniformity of touch performance at various positions of the display panel, in some alternative embodiments, at least part of the common electrode columns further include a transition common electrode 13 between the special-shaped common electrode 11 and the regular common electrode 12; in a column of common electrodes including the shaped common electrode 11, the transition common electrode 13, and electrically connected to the first common signal line 41, the number of the via holes 5 electrically connected between one transition common electrode 13 and the common signal line is greater than or equal to the number of the via holes 5 electrically connected between one regular common electrode 12 and the common signal line.
The transition common electrode 13 is provided between the irregular common electrode 11 and the regular common electrode 12, and one or more transition common electrodes 13 may be provided according to the shape and size of the display panel, and is not particularly limited. The number of the through holes 5 electrically connected between one transition common electrode 13 and the common signal line is larger than or equal to the number of the through holes 5 electrically connected between one regular common electrode 12 and the common signal line, the larger the number of the through holes 5 is, the faster the signal transmission speed is, the stronger the potential restoration capability of the common electrode 10 is, the number of the through holes 5 electrically connected between one transition common electrode 13 and the common signal line is larger than or equal to the number of the through holes 5 electrically connected between one regular common electrode 12 and the common signal line, the first common signal line 41 needs to be disconnected at a position close to the special-shaped common electrode 11 preferentially, the signal transmission distance between the driving circuit 3 and the common electrode 10 is reduced, the signal transmission quality is improved, the driving capability of the special-shaped common electrode 11 is ensured, and the common voltage signal transmission difference is reduced.
In some alternative embodiments, an insulating layer 6 is provided between the common electrode layer 1 and the common signal line layer 4, and the via 5 is provided on the insulating layer 6.
It will be appreciated that the insulating layer 6 is used to separate the common electrode 10 of the common electrode layer 1 from the common signal lines of the common signal line layer 4, avoiding mutual influence, and that the via holes 5 are provided in the insulating layer 6 for electrically connecting the common signal lines with the common electrode 10. Alternatively, the insulating layer 6 may be made of an inorganic material such as silicon nitride or silicon oxide.
Referring to fig. 11, in order to reduce the thickness of the display panel, in some alternative embodiments, the common electrode 10 is multiplexed into a touch electrode, and in the display stage, a common signal line inputs a common voltage signal V1 to the common electrode 10; in the touch stage, the common signal line inputs the touch voltage signal V2 to the common electrode 10.
It should be noted that, the common electrode 10 is multiplexed into a touch electrode in a time-sharing manner, and the light-emitting display and touch functions are respectively realized by receiving different electrical signals in the display stage and the touch stage. Specifically, in the display stage, the common signal line inputs the common voltage signal V1 to the common electrode 10 to drive the common electrode 10 to realize display, and in the touch stage, the common signal line inputs the touch voltage signal V2 to the common electrode 10 to enable the common electrode 10 to realize a touch function as a touch electrode.
Optionally, in the touch stage, each common electrode 10 receives the touch voltage signal V2 through the common electrode line. In the touch stage, the touch voltage signal V2 is generally only sent to the common electrode 10 by the driving circuit 3, and in order to ensure that each common electrode 10 can receive the touch voltage signal V2, the common electrode 10 needs to be electrically connected to a common signal line electrically connected to the driving circuit 3, for example, a second signal line segment 412 of the common signal line, a second common signal line 42, or a third common signal line electrically connected to the driving circuit, so long as the touch voltage signal V2 can be transmitted to the common electrode 10.
In some alternative embodiments, the control circuit 2 includes a plurality of thin film transistors electrically connected to the common electrode 10 through a common signal line.
It will be appreciated that the thin film transistor is used to control the control circuit 2 to send the common voltage signal V1 to the common electrode 10, and alternatively, the driving circuit 3 may control not only itself to send the common voltage signal V1 or the touch voltage signal V2 to the common electrode 10, but also control the transmission of the common voltage signal V1 by the control circuit 2.
To further enhance the potential recovery capability of the common electrode 10, in some alternative embodiments, the first signal line segment 411 is electrically connected to the common electrode 10 through at least two vias 5; and/or, the second signal line segment 412 is electrically connected to the common electrode 10 through at least two vias 5.
It will be appreciated that the potential recovery capability of the common electrode 10 may be improved by increasing the number of vias 5, which may be selected according to the size area of the common electrode 10.
Referring to fig. 12, alternatively, at least two first signal line segments 411 are electrically connected to one common electrode 10 through at least four vias 5, and at least two second signal line segments 412 are electrically connected to one common electrode 10 through at least four vias 5. That is, each common electrode 10 may be electrically connected to at least two first signal line segments 411 and/or two second signal line segments 412, and the signal transmission speed is increased by increasing the number of electrically connected common signal lines, so as to improve the potential recovery capability of the common electrode 10 of the display panel, and improve the uniformity of display and touch performance at each position of the display panel.
The embodiment of the invention also provides a display device, which comprises: and a display panel, wherein the display panel is the display panel in any embodiment. Therefore, the display device provided in the embodiment of the present invention has the technical effects of the technical solution in any of the above embodiments, and the explanation of the same or corresponding structure and terms as those of the above embodiments is not repeated herein. The display device provided by the embodiment of the invention can be a mobile phone or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interactive terminal, etc., which are not particularly limited in this embodiment of the invention.
In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.
It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
Claims (15)
1. A display panel, comprising:
the public electrode layer comprises a plurality of public electrodes which are arranged in an array and are insulated from each other;
a control circuit for providing a common voltage signal to the common electrode;
the driving circuit is used for providing a common voltage signal for the common electrode and controlling the on-off of the control circuit;
a common signal line layer insulated from and laminated with the common electrode layer, the common signal line layer including a plurality of common signal lines extending between the control circuit and the driving circuit, the common signal lines for transmitting the common voltage signal to the common electrode, the common signal lines including a first common signal line including a first signal line segment and a second signal line segment in a direction of extending itself, the first signal line segment and the second signal line segment of the same first common signal line being insulated from each other;
one end of the first signal line segment is electrically connected with the control circuit, and the other end of the first signal line segment is electrically connected with the public electrode through a via hole; one end of the second signal line segment is electrically connected with the driving circuit, the other end of the second signal line segment is electrically connected with the public electrode through the via hole, and the first signal line segment and the second signal line segment of the same first public signal line are respectively electrically connected with different public electrodes.
2. The display panel according to claim 1, wherein each of the common signal lines is the first common signal line.
3. The display panel according to claim 1, wherein the display panel includes the common electrodes arranged in an array of m rows and n columns, and in a column of common electrodes in which the common signal lines electrically connected to the common electrodes are first common signal lines, a1 st common electrode is electrically connected to at least two first signal line segments in a direction from the control circuit to the driving circuit;
the m-th public electrode is electrically connected with at least two second signal line segments;
the (m-1) th common electrode is electrically connected with at least one first signal line segment and at least one second signal line segment; wherein m is greater than or equal to 3, n is greater than or equal to 1, and m and n are integers.
4. The display panel according to claim 1, wherein the common signal lines further include second common signal lines, one ends of the second common signal lines are electrically connected to the control circuit, the other ends are electrically connected to the driving circuit, the second common signal lines are electrically connected to the common electrodes through vias, and each of the second common signal lines is electrically connected to one of the common electrodes.
5. The display panel according to claim 1, wherein the via holes to which the first signal line segments and the second signal line segments electrically connected to the same common electrode are each corresponding are staggered in an extending direction perpendicular to the first common signal line.
6. The display panel according to claim 1, wherein the display panel includes the common electrodes arranged in an array of m rows and n columns, the common electrodes are in a block shape, and orthographic projection areas of the respective common electrodes on the common signal line layer are equal;
the position of the first common signal line segment and the second signal line segment, which are insulated from each other, is a first broken line position; in a column of common electrodes electrically connected to the first common signal line, in a direction directed from the control circuit to the driving circuit:
when m is even, the total number of the first broken lines between the 1~m/2 th public electrodes is A1, and the total number of the first broken lines between the (m/2+1) -m public electrodes is A2, wherein A2 is more than A1;
when m is an odd number, the total number of the first broken lines between the 1 st to ((m-1)/2+1) th public electrodes is A1, and the total number of the first broken lines between the ((m-1/2) +1) th public electrodes is A2, wherein A2 is more than A1.
7. The display panel according to claim 1, wherein the common electrode includes a shaped common electrode and a regular common electrode, the shaped common electrode being disposed at least around a part of the regular common electrode, a forward projection area of the shaped common electrode on the common signal line layer being smaller than a forward projection area of the regular common electrode on the common signal line layer;
in a column of common electrodes including the special-shaped common electrodes and electrically connected with the first common signal line, the number of through holes electrically connected between one special-shaped common electrode and the common signal line is smaller than that of through holes electrically connected between one regular common electrode and the common signal line.
8. The display panel of claim 7, wherein at least a portion of the common electrode columns further comprise a transition common electrode between the shaped common electrode and the regular common electrode;
in a column of common electrodes including the special-shaped common electrode, the transition common electrode and electrically connected with the first common signal line, the number of through holes electrically connected between one transition common electrode and the common signal line is larger than or equal to that of through holes electrically connected between one regular common electrode and the common signal line.
9. The display panel according to claim 1, wherein an insulating layer is provided between the common electrode layer and the common signal line layer, and the via hole is provided in the insulating layer.
10. The display panel according to claim 1, wherein the common electrode is multiplexed as a touch electrode, and the common signal line inputs a common voltage signal to the common electrode in a display stage; in the touch stage, the common signal line inputs a touch voltage signal to the common electrode.
11. The display panel of claim 10, wherein each of the common electrodes receives the touch voltage signal through the common electrode line during the touch phase.
12. The display panel according to claim 1, wherein the control circuit includes a plurality of thin film transistors, and wherein the plurality of thin film transistors are electrically connected to the common electrode through the common signal line.
13. The display panel of claim 1, wherein the first signal line segment is electrically connected to the common electrode through at least two of the vias; and/or the second signal line segment is electrically connected with the public electrode through at least two through holes.
14. The display panel of claim 1, wherein at least two of the first signal line segments are electrically connected to one of the common electrodes through at least four of the vias, and at least two of the second signal line segments are electrically connected to one of the common electrodes through at least four of the vias.
15. A display device, comprising: a display panel according to any one of claims 1 to 14.
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| CN114063358A (en) * | 2020-08-07 | 2022-02-18 | 深超光电（深圳）有限公司 | Thin film transistor array substrate and display panel |
| CN113434058A (en) * | 2021-06-30 | 2021-09-24 | 厦门天马微电子有限公司 | Touch display panel and touch display device |
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