CN112684931A - Display panel and display device - Google Patents
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- CN112684931A CN112684931A CN202011587827.9A CN202011587827A CN112684931A CN 112684931 A CN112684931 A CN 112684931A CN 202011587827 A CN202011587827 A CN 202011587827A CN 112684931 A CN112684931 A CN 112684931A
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Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises: the common electrode layer comprises a plurality of common electrodes which are arranged in an array and are mutually insulated; a control circuit; a drive circuit; the common signal line layer comprises a plurality of common signal lines extending between the control circuit and the drive circuit, the common signal lines are used for transmitting common voltage signals to the common electrodes, 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 extending direction of the first common signal lines; 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 common electrode through the through 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 common electrode through the through hole, and the first signal line segment and the second signal line segment of the same first common signal line are respectively electrically connected with different common electrodes, so that the potential recovery capability of the common 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 more and more widely applied to display devices of various sizes, and as a display panel of a novel human-computer interaction input mode, a touch screen is simpler, more direct and more convenient to input compared with the traditional modes of a display, a keyboard and a mouse.
In the prior art, the common electrode serving as the touch electrode is electrically connected due to process limitations, so that the common electrode has a risk of visible patterns.
Therefore, a new display panel and a new display device are needed.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, wherein the number of via holes corresponding to at least part of common electrodes is increased by arranging a first signal line segment and a second signal line segment, so that the potential recovery capability of the common electrodes is improved.
In a first aspect, an embodiment of the present invention provides a display panel, including: the common electrode layer comprises a plurality of common electrodes which are arranged in an array and are mutually insulated; the control circuit is used for providing a common voltage signal for 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; the common signal line layer is insulated from the common electrode layer and is arranged in a stacked mode, the common signal line layer comprises a plurality of common signal lines extending between the control circuit and the drive circuit, the common signal lines are used for transmitting the common voltage signals to the common electrodes, the common signal lines comprise first common signal lines, the first common signal lines comprise first signal line segments and second signal line segments in the extending direction of the first common signal lines, and the first signal line segments and the second signal line segments of the same first common signal lines are 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 common electrode through a through 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 common electrode through the through hole, and the first signal line segment and the second signal line segment of the same first common signal line are respectively and electrically connected with different common electrodes.
In a second aspect, an embodiment of the present invention provides a display device, including: the display panel is the display panel in any one of the embodiments.
Compared with the related art, the display panel provided by the embodiment of the invention comprises a common electrode layer, a control circuit, a driving circuit and a common signal line layer, wherein the common signal line layer comprises a common signal line used for transmitting a common signal to a common electrode, a first common signal line of the common 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 common electrode, the second signal line segment is used for electrically connecting the driving circuit and the common electrode, and the first signal line segment and the second signal line segment can both transmit a common voltage signal to the common electrode so as to realize the light-emitting display function of the display panel. Because the first signal line segment and the second signal line segment are electrically connected with each common electrode through the through holes, the number of the through holes corresponding to at least part of common electrodes can be increased by setting the first signal line segment and the second signal line segment, namely, the signal quantity of common voltage signals received by the common electrodes in unit time is increased, and the potential recovery capability of the common electrodes is improved.
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 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 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 display panel according to an embodiment of the present invention;
FIG. 2 is a diagram of the structure of the film 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 diagram of a display panel according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display panel according to still another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
fig. 11 is a timing diagram for driving a display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display panel according to still another embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present 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 present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
For better understanding of the present invention, the following description is made in detail with reference to fig. 1 to 12 for a display panel and a display device according to an embodiment of the present invention.
Referring to fig. 1 to 2, fig. 1 is a display panel according to an embodiment of the present invention, including: the common electrode layer 1 comprises a plurality of common electrodes 10, and the common electrodes 10 are arranged in an array and are insulated from each other; a control circuit 2 for providing 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 the common electrode layer 1 and stacked, 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 being used to transmit 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 its extending direction, 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, the other end is electrically connected to the common electrode 10 through the via 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 with only one common electrode 10 through the via hole 5, but the number of the common signal lines that can be electrically connected with each common electrode 10 and the number of the via holes 5 corresponding to each common signal line are limited by the shape, arrangement and aperture ratio of the common electrode 10. The number of the via holes 5 affects the transmission speed of the common voltage signal, and since the number of the via holes 5 corresponding to each common electrode 10 is limited, the signal transmission speed for each common electrode 10 is slow, and particularly, under the high-frequency condition, the common electrode 10 has a short recovery time and the potential of the common electrode 10 cannot be recovered in time due to the high refresh frequency of the common voltage signal, so that the common electrode 10 has the risks that the potential cannot be recovered and the pattern is visible.
In the display panel provided in the embodiment of the present invention, because the first signal line segment 411 and the second signal line segment 412 are both required to be electrically connected to each common electrode 10 through the via hole 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 amount of the common voltage signal received by the common electrode 10 in a unit time is increased, the potential recovery capability of at least part of the common electrodes 10 is improved, the uniformity of the potential recovery of the common electrode 10 of the display panel is further improved, and the problem that the potential of the common electrode 10 cannot be recovered or a pattern is visible is prevented from being generated.
In order to facilitate wiring and avoid interference with other components, the control circuit 2 and the driving circuit 3 may be respectively disposed on both sides of the common electrode layer 1, 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 and stacked with the common electrode layer 1, which means that the common signal line layer 4 is insulated from the common electrode layer 1, and is not directly and integrally contacted and electrically connected, 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 from each other through an 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 may be disposed between the first signal line segment 411 and the second signal line segment 412 for insulation, the first common signal line 41 may 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 the first signal line segment and the second signal line segment 412 which are not electrically connected to each other may be directly formed, which makes the process 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, i.e. affected by the relative positions of the first signal line segment 411 and the second signal line segment 412, 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. Specifically, the first signal line segment 411 and the second signal line segment 412 may respectively transmit the common voltage signal V1 to two common electrodes 10 adjacent in the extending direction of the first signal line segment and the second signal line segment.
Referring to fig. 3, in some alternative embodiments, each common signal line is a first common signal line 41. Specifically, each common signal line comprises a first signal line segment 411 and a second signal line segment 412, and 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, the potential recovery uniformity of the common electrode 10 of the display panel is further improved, and the problem that the potential cannot be recovered or the graph is visible generated by each common electrode 10 is improved.
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 where the common signal lines electrically connected to the common electrodes 10 are the 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 to 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 more than or equal to 3, n is more than or equal to 1, and m and n are integers.
It should be noted that the common electrodes 10 are arranged in an m-row n-column array, that is, a matrix type arrangement, and m common electrodes 10 are included in one column of the common electrodes 10. In at least one column of the common electrodes 10, the common signal lines electrically connected to the common electrodes 10 are all the first common signal lines 41, in the column of the common electrodes 10, in a direction from the control circuit 2 to the driving circuit 3, the 1 st common electrode 10 is electrically connected to 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 column of the common electrodes 10, and the 1 st common electrode 10 is electrically connected to at least two first signal line segments 411, because the first signal line segments 411 are electrically connected to the control circuit 2, the electrical connection between the 1 st common electrode 10 and the first signal line segments 411 can effectively reduce the signal transmission distance, and ensure the signal transmission quality.
Similarly, the mth common electrode 10 is the one common electrode 10 closest to the driving circuit 3, the mth common electrode 10 is electrically connected to 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 of signals from the driving circuit 3 to the mth common electrode 10 can be reduced. And 2 to (m-1) common electrodes 10 located between the 1 st and the 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, in addition to the first common signal line 41, the common signal line further includes a second common signal line 42, one end of the second common signal line 42 is electrically connected to the control circuit 2, the other end of the second common signal line 42 is electrically connected to the driving circuit 3, the second common signal line 42 is electrically connected to the common electrodes 10 through the via holes 5, and each second common signal line 42 is electrically connected to one common electrode 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 of the second common signal line are electrically connected with the control circuit 2 and the driving circuit 3 respectively, and are electrically connected with the common electrode 10 through the via 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, and the driving capability of the common electrode 10 is improved. It should be noted that each second common signal line 42 can only be electrically connected to one common electrode 10, but cannot be electrically connected to two common electrodes 10 at the same time, so as to ensure that the common voltage signal V1 is normally transmitted, and each common electrode 10 can be electrically connected to a plurality of second common signal lines 42 or the first common signal line 41, and is not particularly limited, and can be selected according to the size and shape of the common electrode 10. Specifically, as shown in fig. 4, a column of common electrodes 10 is electrically connected to one first common signal line 41 and three second common signal lines 42; as shown in fig. 5, the common electrodes 10 of one column are electrically connected to the two first common signal lines 41; as shown in fig. 6, the common electrode 10 of one column and the 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 the third common signal line is electrically connected to one of the control circuit 2 and the driving circuit 3, and the other end of the third common signal line is electrically connected to the common electrode 10 through the via hole 5.
Referring to fig. 5 or fig. 7, in order to avoid the excessive stacking density of the local vias 5, which results in the display, in some alternative embodiments, the vias 5 corresponding to the first signal line segments 411 and the second signal line segments 412 electrically connected to the same common electrode 10 are arranged in a staggered manner in 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 arranged in a staggered manner, so that the via holes 5 are distributed more uniformly, and it is avoided that when the number of the via holes 5 is large, the local via hole 5 packing density is too high, which results in visible display. Similarly, when the common electrode 10 and the second common signal line 42 are also electrically connected by the via holes 5, the arrangement positions of the respective via holes 5 corresponding to the common electrode 10 in the extending direction perpendicular to the first common signal line 41 may also be staggered.
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 block-shaped, and the orthographic projection area of each common electrode 10 on the common signal line layer 4 is equal; 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 a first line break d; in the common electrode 10 of one column electrically connected to the first common signal line 41, in a direction directed from the control circuit 2 to the drive circuit 3: when m is an even number, the total number of the first broken lines d between the 1 st to m/2 th common electrodes 10 is A1, the total number of the first broken lines d between the (m/2+1) th to m th common electrodes 10 is A2, A2 is more than A1; when m is an odd number, the total number of d at the first disconnection between the 1 st to ((m-1)/2+1) th common electrodes 10 is A1, the total number of d at the first disconnection between the ((m-1)/2+1) th to m-th common electrodes 10 is A2, and A2 > A1.
It should be noted that, for convenience of arrangement, the common electrode 10 is in a block shape, and may specifically be in a rectangular block shape or a diamond shape. The forward projection areas of the 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 disconnection point d, and the first signal line segment 411 and the second signal line segment 412 are not electrically connected at the first disconnection point d and are in a disconnected 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 point d.
A column of common electrodes 10 electrically connected to the first common signal line 41, specifically, at least one common electrode 10 in the column of common electrodes 10 is electrically connected to the first common signal line 41, and in the column of common electrodes 10, in a direction from the control circuit 2 to the driving circuit 3: when m is an even number, the total number of d at the first disconnection between the 1 st to m/2 th common electrodes 10 is A1, and the total number of d at the first disconnection between the (m/2+1) th to m th common electrodes 10 is A2, A2 > A1. For example, as shown in fig. 7, when m is equal to 4, the total number of the first line breaks d between the 1 st and 2 nd common electrodes 10 is a1, the total number of the first line breaks d between the 3 rd and 4 th common electrodes 10 is a2, a2 > a1, that is, the number of the first line breaks d near the driving circuit 3 is larger.
When m is an odd number, the total number of the first disconnection points d between the 1 st to ((m-1)/2+1) th common electrodes 10 is a1, which is greater than the total number a2 of the first disconnection points d between the ((m-1)/2+1) th to m-th common electrodes 10, for example, as shown in fig. 8, when m is 3, the total number of the first disconnection points d between the 1 st to (m-1)/2+1) th common electrodes 10, that is, the first disconnection points d between the 1 st and 2 nd common electrodes 10 is a1, and the total number of the first disconnection points d between the 2 nd and 3 rd common electrodes 10 is a2, a2 > a 1. Similarly, when m takes other values, the magnitude relationship of a1 and a2 is the same, so as to ensure that the number of d is greater near the first line break of the driving 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 line is broken preferentially at the first broken line d close to the driving circuit 3, so that the common electrode 10 below the first broken line d can quickly receive signals in the direction pointing to the driving circuit 3 from the control circuit 2, and the uniformity of the signals received by the common electrode 10 is ensured.
In addition, in the direction 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 to the common electrode 10 below the first disconnection point d is relatively small, and the signal can be rapidly transmitted to the common electrode 10 below the first disconnection point d, so that on the basis of ensuring that the risk of visibility of the graph of the common electrode 10 is reduced, the quality of the signal received by the common electrode 10 below the first disconnection point d is improved, the difference of signal transmission among the common electrodes 10 is further reduced, and the uniformity of the signal received by each common electrode 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, the shaped common electrode 11 is disposed around at least a portion of the regular common electrode 12, and an orthographic area of the shaped common electrode 11 on the common signal line layer 4 is smaller than an orthographic area of the regular common electrode 12 on the common signal line layer 4; in a column of common electrodes including the irregular common electrode 11 and electrically connected to the first common signal line 41, the number of via holes 5 electrically connected between one irregular common electrode 11 and the common signal line is smaller than the number of via holes 5 electrically connected between one regular common electrode 12 and the common signal line.
It should be noted that, influenced by the shape of the display panel, the common electrode 10 includes an irregular common electrode 11 and a regular common electrode 12, and the irregular common electrode 11 is usually disposed at a corner position of the display panel and matches with the shape of the display panel. Specifically, the irregular common electrode 11 is at least arranged around part of the regular common electrode 12, and an orthographic projection area of the irregular common electrode 11 on the common signal line layer 4 is smaller than an orthographic projection area of the regular common electrode 12 on the common signal line layer 4, the regular common electrode 12 may specifically adopt a shape of a rectangle or the like, and the irregular common electrode 11 may specifically adopt a shape of a quarter circle or other fan-shaped or the like.
In order to ensure the display uniformity of the display panel, in a column of common electrodes including the special-shaped common electrode 11 and electrically connected to the first common signal line 41, specifically, the column of common electrodes 10 includes the special-shaped common electrode 11, and at least one common electrode 10 is electrically connected to the first common signal line 41. The number of the via holes 5 electrically connected between one special-shaped common electrode 11 and the common signal line is smaller than the number of the via 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 via holes 5 is, the faster the signal transmission speed is, the stronger the potential recovery capability of the common electrode 10 is, and as the orthographic area of the special-shaped common electrode 11 on the common signal line layer 4 is smaller than the orthographic area of the regular common electrode 12 on the common signal line layer 4, the lower the number of holes punched is required for the special-shaped common electrode 11 to achieve the same potential recovery capability as the regular common electrode 12, and the uniformity and consistency of the potential recovery of each common electrode 10 of the display panel are ensured.
Referring to fig. 10, in order to improve the touch performance uniformity at each position of the display panel, in some optional embodiments, at least a part of the common electrode columns further include a transition common electrode 13 located between the irregular common electrode 11 and the regular common electrode 12; in a column of common electrodes which comprises the special-shaped common electrode 11, the transition common electrode 13 and the first common signal line 41 and is electrically connected with the first common signal line, 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 transitional common electrode 13 is disposed between the irregular common electrode 11 and the regular common electrode 12, and one or more transitional common electrodes 13 may be specifically disposed according to the shape and size of the display panel, and is not particularly limited. 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 greater the number of the via holes 5, the faster the signal transmission speed, and the stronger the potential recovery capability of the common electrode 10, so that 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, and the first common signal line 41 needs to be disconnected preferentially at a position close to the special-shaped common electrode 11, thereby reducing the signal transmission distance between the driving circuit 3 and the common electrode 10, improving the signal transmission quality, ensuring the driving capability of the special-shaped common electrode 11, and reducing the common voltage signal transmission difference.
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 is understood that the insulating layer 6 is used to separate the common electrode 10 of the common electrode layer 1 and the respective common signal lines of the common signal line layer 4 from each other, and the via hole 5 is provided in the insulating layer 6 for electrically connecting the common signal line and 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 reused as a touch electrode, and in the display stage, the common signal line inputs a common voltage signal V1 to the common electrode 10; in the touch phase, the common signal line inputs a touch voltage signal V2 to the common electrode 10.
It should be noted that the common electrode 10 is time-division multiplexed as a touch electrode, and the light emitting display and the touch function 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 a 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 a touch voltage signal V2 to the common electrode 10 to enable the common electrode 10 to serve as a touch electrode to realize a touch function.
Optionally, in the touch stage, each common electrode 10 receives the touch voltage signal V2 through the common electrode line. It should be noted that, in the touch phase, the touch voltage signal V2 is usually sent to the common electrode 10 only through 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, the second signal line segment 412 of the common signal line, the second common signal line 42, or a third common signal line electrically connected to the driving circuit, as 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 is understood that the thin film transistor is used for controlling the control circuit 2 to send the common voltage signal V1 to the common electrode 10, and optionally, the driving circuit 3 may control not only sending the common voltage signal V1 or the touch voltage signal V2 to the common electrode 10 itself, but also controlling the transmission of the common voltage signal V1 of the control circuit 2.
To further improve 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 with the common electrode 10 through at least two vias 5.
It is understood that the potential recovery capability of the common electrode 10 can be improved by increasing the number of the via holes 5, and the number of the via holes 5 can be selected according to the size area of the common electrode 10.
Referring to fig. 12, optionally, 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 number of the electrically connected common signal lines is increased to increase the signal transmission speed, thereby improving the potential recovery capability of the common electrode 10 of the display panel and improving the uniformity of the display and touch performance of each position of the display panel.
An embodiment of the present invention further provides a display device, including: the display panel is the display panel in any one of the embodiments. Therefore, the display device provided in the embodiment of the present invention has the technical effects of the technical solutions in any of the embodiments, and the explanations of the structures and terms that are the same as or correspond to the embodiments are not repeated herein. The display device provided by the embodiment of the invention can be a mobile phone and can also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
As will be apparent to those skilled in the art, 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, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
It should also be noted that the exemplary embodiments mentioned in this patent 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, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Claims (15)
1. A display panel, comprising:
the common electrode layer comprises a plurality of common electrodes which are arranged in an array and are mutually insulated;
the control circuit is used for providing a common voltage signal for 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;
the common signal line layer is insulated from the common electrode layer and is arranged in a stacked mode, the common signal line layer comprises a plurality of common signal lines extending between the control circuit and the drive circuit, the common signal lines are used for transmitting the common voltage signals to the common electrodes, the common signal lines comprise first common signal lines, the first common signal lines comprise first signal line segments and second signal line segments in the extending direction of the first common signal lines, and the first signal line segments and the second signal line segments of the same first common signal lines are 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 common electrode through a through 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 common electrode through the through hole, and the first signal line segment and the second signal line segment of the same first common signal line are respectively and electrically connected with different common 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 comprises m rows and n columns of the common electrodes, and in a column of the common electrodes in which the common signal lines electrically connected to the common electrodes are first common signal lines, the 1 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 mth public electrode is electrically connected with at least two second signal line segments;
the 2 nd to (m-1) th common electrodes are electrically connected with at least one first signal line segment and at least one second signal line segment; wherein m is more than or equal to 3, n is more than or equal to 1, and m and n are integers.
4. The display panel according to claim 1, wherein the common signal line further includes a second common signal line, one end of the second common signal line is electrically connected to the control circuit, the other end of the second common signal line is electrically connected to the driving circuit, the second common signal line is 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 vias corresponding to the first signal line segment and the second signal line segment electrically connected to the same common electrode are arranged alternately in a direction perpendicular to an extending direction of the first common signal line.
6. The display panel according to claim 1, wherein the display panel comprises m rows and n columns of the common electrodes arranged in an array, the common electrodes are in a block shape, and the orthographic projection area of each common electrode on the common signal line layer is equal;
the position of the first common signal line, at which the first signal line segment and the second signal line segment 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 pointing from the control circuit to the drive circuit:
when m is an even number, the total number of the first line breaks between the 1 st to m/2 th common electrodes is A1, the total number of the first line breaks between the (m/2+1) th to m th common electrodes is A2, A2 > A1;
when m is an odd number, the total number of the first disconnection between the common electrodes of 1 st to ((m-1)/2+1) th numbers is A1, and the total number of the first disconnection between the common electrodes of ((m-1/2) +1) th to m numbers is A2, A2 > A1.
7. The display panel according to claim 1, wherein the common electrode comprises 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, an area of an orthographic projection of the shaped common electrode on the common signal line layer being smaller than an area of an orthographic projection of the regular common electrode on the common signal line layer;
in a row of common electrodes including the irregular common electrode and electrically connected to the first common signal line, the number of via holes electrically connected between one of the irregular common electrodes and the common signal line is smaller than the number of via holes electrically connected between one of the regular common electrodes and the common signal line.
8. The display panel according to claim 7, wherein at least part of the common electrode columns further comprise a transition common electrode between the irregular common electrode and the regular common electrode;
in a row of common electrodes which comprise the special-shaped common electrodes, the transition common electrodes and the first common signal line and are electrically connected with the first common signal line, the number of via holes electrically connected between one transition common electrode and the common signal line is greater than or equal to the number of via 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 wherein the via hole is provided in the insulating layer.
10. The display panel according to claim 1, wherein the common electrode is reused as a touch electrode, and the common signal line inputs a common voltage signal to the common electrode in a display phase; in a touch control stage, the common signal line inputs a touch control voltage signal to the common electrode.
11. The display panel according to claim 10, wherein during the touch phase, each of the common electrodes receives the touch voltage signal via the common electrode line.
12. The display panel according to claim 1, wherein the control circuit comprises a plurality of thin film transistors electrically connected to the common electrode through the common signal line.
13. The display panel according to claim 1, wherein the first signal line segment is electrically connected to the common electrode through at least two of the via holes; and/or the second signal line segment is electrically connected with the common electrode through at least two via holes.
14. The display panel according to 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 via holes, 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 via holes.
15. A display device, comprising: a display panel according to any one of claims 1 to 14.
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| CN112684931B (en) | 2023-10-24 |
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