CN111739453B - Display panel and display device - Google Patents
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- CN111739453B CN111739453B CN202010599113.3A CN202010599113A CN111739453B CN 111739453 B CN111739453 B CN 111739453B CN 202010599113 A CN202010599113 A CN 202010599113A CN 111739453 B CN111739453 B CN 111739453B
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Abstract
The invention discloses a display panel and a display device, and relates to the technical field of display, wherein the display panel comprises a display area and a non-display area, the non-display area comprises a binding area, and the binding area comprises a plurality of signal input ends; the display panel further comprises at least one crack detection circuit located in the non-display area, one crack detection circuit comprising a plurality of crack detection cells, at least one dummy cell, and at least one first signal line; the crack detection unit and the virtual unit are electrically connected with the first signal wire, and the first signal wire is also electrically connected with the signal input end; the dummy cell is located between the crack detection cell and a signal input terminal in an extending direction of the first signal line. Therefore, the virtual unit is introduced between the crack detection unit and the signal input end, so that the influence of static electricity on the crack detection unit is avoided, and the reliability of the crack detection process is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the continuous development of display technology, display devices are applied more and more widely in various fields. In general, in the process of manufacturing a display panel, a plurality of patterns of the display panel are formed on a mother substrate, and the mother substrate is cut to finally obtain a discrete display panel, but cracks may be generated at the edge of the display panel in a cutting process, and the cracks may extend into the display panel with the increase of service time, thereby affecting the service life of the display panel.
In most of the conventional methods for detecting cracks, a metal wire for detecting cracks is formed at the edge of a display panel, and the metal wire is electrically connected to a crack detection circuit, so that whether cracks exist in the display panel is detected by the crack detection circuit. However, in the production process of the display panel, static electricity is easily accumulated in the wirings in the crack detection circuit, and the static electricity easily causes the crack detection circuit electrically connected to the metal wire to fail, so that the crack cannot be normally detected.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, in which a dummy unit is introduced between a crack detection unit and a signal input terminal to prevent static electricity from affecting the crack detection unit, thereby facilitating improvement of reliability of a crack detection process.
In a first aspect, the present application provides a display panel, the display panel comprising a display area and a non-display area, the non-display area comprising a bonding area, the bonding area comprising a plurality of signal input terminals;
the display panel further comprises at least one crack detection circuit located in the non-display area, one crack detection circuit comprising a plurality of crack detection cells, at least one dummy cell, and at least one first signal line; the crack detection unit and the virtual unit are electrically connected with the first signal wire, and the first signal wire is also electrically connected with the signal input end; the dummy cell is located between the crack detection cell and a signal input terminal in an extending direction of the first signal line.
In a second aspect, the present application provides a display device including the display panel provided by the present application.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
in the display panel and the display device provided by the invention, at least one crack detection circuit is arranged in a non-display area of the display panel, the crack detection circuit comprises a plurality of crack detection units, at least one virtual unit and at least one first signal wire, the first signal wire is respectively and electrically connected with the signal input end, the crack detection unit and the virtual unit, particularly, the virtual unit is positioned between the crack detection unit and the signal input end in the extending direction of the first signal wire, and therefore, the first signal wire is equivalent to be firstly connected with the virtual unit and then connected with the crack detection unit. When static electricity is accumulated on the first signal wiring, the static electricity is transmitted to the virtual unit through the first signal wiring, and the introduction of the virtual unit reduces the possibility that the static electricity is transmitted to the crack detection unit, so that the possibility that the crack detection unit fails due to the static electricity is greatly reduced, the possibility that the crack detection unit cannot normally detect the crack is further reduced, and the reliability of the crack detection process in the display panel and the display device is improved.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a top view of a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a crack detection circuit in a display panel according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram illustrating another crack detection circuit in a display panel according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram illustrating another crack detection circuit in a display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram illustrating another crack detection circuit in a display panel according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram illustrating another crack detection circuit in a display panel according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram illustrating another crack detection circuit in a display panel according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram illustrating another crack detection circuit in a display panel according to an embodiment of the present disclosure;
FIG. 9 is a schematic diagram illustrating a structure of a bonding area in a display panel according to an embodiment of the present application;
FIG. 10 is a schematic diagram illustrating another structure of a bonding area in a display panel according to an embodiment of the present application;
FIG. 11 is a diagram illustrating a relationship between crack detection circuits and sub-pixels in a display panel;
fig. 12 is a schematic view of a display device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a top view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a crack detection circuit in the display panel according to the embodiment of the present invention, and referring to fig. 1 and fig. 2, the present invention provides a display panel 100, the display panel 100 includes a display area 10 and a non-display area 20, the non-display area 20 includes a binding area 21, and the binding area 21 includes a plurality of signal input terminals 60;
the display panel 100 further includes at least one crack detection circuit located in the non-display area 20, one crack detection circuit including a plurality of crack detection cells 30, at least one dummy cell 40, and at least one first signal line 50; the crack detection unit 30 and the dummy unit 40 are both electrically connected to the first signal line 50, and the first signal line 50 is also electrically connected to the signal input terminal 60; the dummy cell 40 is located between the crack detection unit 30 and the signal input terminal 60 in the extending direction of the first signal line 50.
The display panel 100 may be a liquid crystal display panel or an organic light emitting diode display panel. With the continuous development of display technologies, flexible display panels are used more and more widely, the flexible display panels themselves may be bent, and the bending stress may cause cracks to form on the display panels, so the display panel 100 provided in this application is also particularly suitable for flexible display panels. Note that fig. 1 only illustrates the entire top-view structure of the display panel 100, and does not represent actual sizes of the display area 10 and the non-display area 20. Fig. 2 also illustrates only the partial crack detection units 30 and the partial dummy units 40 included in the crack detection circuit, and does not represent the actual number of crack detection units 30 and dummy units 40.
Specifically, with continuing reference to fig. 1 and fig. 2, in the display panel 100 provided by the present application, a plurality of signal input terminals 60 are disposed in the bonding area 21, and at least one crack detection circuit is disposed in the non-display area 20, the crack detection circuit includes a plurality of crack detection units 30, at least one dummy unit 40, and at least one first signal line 50, the first signal line 50 is electrically connected to the signal input terminals 60, the crack detection units 30, and the dummy unit 40, in particular, in the extending direction of the first signal line 50, the dummy unit 40 is located between the crack detection units 30 and the signal input terminals 60, which is equivalent to that the first signal line is connected to the dummy unit 40 first and then to the crack detection unit 30. When static electricity is accumulated on the first signal wiring, the static electricity is transmitted to the dummy unit 40 through the first signal wiring 50, and the introduction of the dummy unit 40 reduces the possibility that the static electricity is transmitted to the crack detection unit 30, so that the possibility that the crack detection unit 30 fails due to the static electricity is greatly reduced, the possibility that the crack detection unit 30 cannot normally detect the crack is further reduced, and the reliability of the crack detection process of the display panel 100 is improved.
In an alternative embodiment of the present invention, please continue to refer to fig. 3, fig. 3 is another schematic structural diagram of the crack detection circuit in the display panel 100 according to the embodiment of the present application, and referring to fig. 3, the display panel 100 according to the embodiment of the present application further includes a plurality of data lines 70 arranged along a first direction X and extending along a second direction Y, where the first direction X intersects with the second direction Y;
the crack detection circuit further includes a control signal line SW, a level signal line V1, and a detection signal line T disposed around the display area 10;
the crack detection unit 30 includes a plurality of first switch units 31, a control end of each of the first switch units 31 is connected to the same control signal line SW, a first end of each of the first switch units 31 is electrically connected to a different data line 70, a second end of at least a part of the first switch units 31 is connected to the level signal line V1, and a second end of at least a part of the first switch units 31 is connected to the detection signal line T.
Referring to fig. 1 and 3, the display panel 100 is provided with a display area 10 as a non-display area 20 surrounding the display area 10, and the detection signal line T mentioned in the present application is disposed around the display area 10, which means that the detection signal line T is disposed in the non-display area 20 of the display panel 100 and extends along the non-display area 20, so as to detect whether there is a crack in the display panel 100 through the detection signal line T, and the detection operation is simple and reliable. Referring to fig. 3, the crack detection unit 30 of the present application includes a plurality of first switch units 31, a control terminal of each first switch unit 31 is connected to the same control signal line SW, a first terminal of each first switch unit 31 is electrically connected to a different data line 70, a second terminal of a part of the first switch units 31 is electrically connected to the detection signal line T, and a second terminal of another part of the switch units is electrically connected to the level signal line V1. In the crack detection process, the control signal line SW inputs an alternating current signal to each first switch unit 31, when no crack occurs in the display panel 100, the detection signal line T is complete, and no disconnection occurs, at this time, each first switch unit 31 is in a closed state, and the display panel 100 is in a black state as a whole; when the display panel 100 has a crack, the detection signal line T is broken, which causes a change in the signal at the second end of the first switch unit 31 electrically connected to the detection signal line T, for example, after the detection signal line T is broken, the voltage on the detection signal line is 0, which causes a change in the voltage difference between the control end and the second end of the first switch unit 31, and further causes the first switch unit 31 to be turned on, so that a signal is transmitted to the data line 70 through the first switch unit 31, and the sub-pixel electrically connected to the data line 70 is turned on, thereby causing a bright line in the display panel 100. That is, during crack detection, if the display panel 100 assumes a black state, it represents that there is no crack on the display panel 100; if a bright line appears on the display panel 100, it represents that there is a crack on the display panel 100.
Alternatively, the first switch unit 31 may be a P-type transistor, and the crack detection process will be described below by taking the first switch unit as a P-type transistor, where the voltages on the detection signal line T and the level signal line V1 are both high level signals. In the crack detection stage, the control signal line SW inputs an ac signal to the gate of each P-type transistor, and the amplitude of the high level signal in the ac signal is smaller than the amplitude of the high level signal on the detection signal line T and the level signal line V1, that is, the voltage of the gate of the P-type transistor is smaller than the voltage of the electrode of the P-type transistor electrically connected to the detection signal line T or the level signal line V1, so that the P-type transistor is in an off state, and when the P-type transistor is off, no signal is transmitted to the data line 70, so that the display panel 100 assumes a black state. When a crack occurs on the display panel 100, the detection signal line T is broken, the voltage on the detection signal line T is reduced, so that the voltage of one electrode of the P-type transistor electrically connected with the detection signal line T is lower than the gate voltage, at this time, the corresponding P-type transistor is turned on, a lower voltage signal on the detection signal line T is transmitted to the data line 70 through the P-type transistor, and the sub-pixel electrically connected with the data line 70 is lighted, so that a bright line occurs on the display panel 100, and the existence of the bright line indicates that the crack exists on the display panel 100. In some other embodiments of the present application, the first switching unit 31 may also be embodied as an N-type transistor, which is not specifically limited by the present application.
In an alternative embodiment of the present invention, referring to fig. 1 and fig. 3, the first signal line 50 is at least one of the control signal line SW, the level signal line V1 and the detection signal line T.
Specifically, when the first signal line 50 is the control signal line SW, it indicates that the control signal line SW is electrically connected to the dummy cell 40 first and then electrically connected to the crack detection unit 30, and if there is static electricity accumulated on the control signal line SW, the static electricity will act on the dummy cell 40 closest to the control signal line SW without affecting the crack detection unit 30. Similarly, when the first signal line 50 is the level signal line V1, indicating that the level signal line V1 is electrically connected to the dummy cell 40 first and then to the crack detection unit 30, if there is a static electricity accumulation on the level signal line V1, the static electricity will act on the dummy cell 40 closest to the level signal line V1 without affecting the crack detection unit 30. Similarly, when the first signal line 50 is the detection signal line T, it indicates that the detection signal line T is electrically connected to the dummy cell 40 first and then electrically connected to the crack detection unit 30, and if there is static electricity accumulated on the detection signal line T, the static electricity will act on the dummy cell 40 closest to the detection signal line T, and will not affect the crack detection unit 30. Preferably, the control signal line SW, the level signal line V1 and the detection signal line T in the present application may be electrically connected to the dummy unit 40 first and then electrically connected to the crack detection unit 30, so that any one of the control signal line SW, the level signal line V1 and the detection signal line T has static electricity accumulation, and the static electricity can only act on the dummy unit 40 without affecting the crack detection unit 30, thereby effectively avoiding the influence of the static electricity on the crack detection process, and facilitating to improve the reliability of the crack detection process.
In an alternative embodiment of the present invention, fig. 4 is a schematic diagram illustrating another structure of the crack detection circuit in the display panel 100 according to the embodiment of the present application, where the dummy unit 40 includes a second switch unit 42, a control end of the second switch unit 42 is connected to the control signal line SW, a first end of the second switch unit 42 is connected to the level signal line V1, and a second end of the second switch unit is floating.
Specifically, fig. 4 shows an embodiment of the dummy cell 40, in which the dummy cell 40 includes a second switch unit 42, a control terminal of the second switch unit 42 is connected to the control signal line SW, a first terminal is connected to the level signal line V1, and a second terminal is floating. Alternatively, the level signal line V1 and the detection signal line T are electrically connected, and both are equipotential. When static electricity is accumulated on the level signal line V1, the detection signal line T, or the control signal line SW, since the level signal line V1 and the control signal line SW are electrically connected to the dummy cell 40 first, the static electricity will be transmitted to the second switch unit 42 in the dummy cell 40 and act on the second switch unit 42, and since the second end of the second switch unit 42 is floating, even if the static electricity acts on the second switch unit 42, no influence will be caused on other circuits on the display panel 100, and no influence will be caused on the crack detection unit 30, thereby preventing the crack detection unit 30 from failing due to the existence of the static electricity, and facilitating to improve the reliability of crack detection. It should be noted that fig. 4 only shows a case where two second switches are included in one crack detection circuit, and actually, the number of the second switch units 42 may be set according to the space of the display panel 100, and if there is enough space on the display panel 100 to set the dummy unit 40, more second switch units 42 may be set on the display panel 100 to further reduce the influence of static electricity on the crack detection unit 30.
In an alternative embodiment of the invention, fig. 5 is a schematic structural diagram of a crack detection circuit in a display panel 100 according to an embodiment of the present application, and a second end of the dummy unit 40 is connected to the metal trace 43. In this way, the metal trace 43 is equivalent to connect the floating end of the dummy cell 40 to the metal trace 43, and the metal trace 43 is equivalent to a resistor, so that the load of the dummy cell 40 is increased, and if static electricity acts on the dummy cell 40, the static electricity will be conducted to the metal trace 43, which is beneficial to enhancing the antistatic capability of the dummy cell 40.
In an alternative embodiment of the present invention, fig. 6 is a schematic diagram illustrating another structure of the crack detection circuit in the display panel 100 according to the embodiment of the present invention, where the dummy unit 40 includes a first capacitor 44, a first pole of the first capacitor 44 is connected to the level signal line V1, and a second pole of the first capacitor 44 is connected to the detection signal line T.
Specifically, fig. 6 shows another embodiment of the dummy cell 40 in the crack detection circuit, in which the dummy cell 40 is embodied as a capacitor 44, two poles of the capacitor 44 are respectively connected to the level signal line V1 and the detection signal line T, and when static electricity is applied to the dummy cell 40, static electricity charges are stored in the first capacitor 44, thereby also being beneficial to avoiding the static electricity from being transmitted to the crack detection unit 30 to affect the crack detection process. It should be noted that the size of the first capacitor 44 can be set according to the actual space on the display panel 100, and the larger the first capacitor 44 is accommodated, the more the electrostatic charges can be stored, which is more beneficial to improving the antistatic capability of the dummy unit 40. It should be noted that fig. 6 only shows a case where two first capacitors 44 are included in one crack detection circuit, in practice, the number of first capacitors 44 may be set according to the space of the display panel 100, and if there is enough space on the display panel 100 to dispose the dummy unit 40, more first capacitors 44 may be disposed on the display panel 100 to further reduce the influence of static electricity on the crack detection unit 30.
In an alternative embodiment of the present invention, fig. 7 is a schematic diagram illustrating another structure of the crack detection circuit in the display panel 100 according to the embodiment of the present application, where the dummy unit 40 includes static electricity discharge units, one of the static electricity discharge units includes a first transistor 41 and a second transistor 42, a control terminal and a first terminal of the first transistor 41 are both connected to the level signal line V1, a second terminal of the first transistor 41 is connected to the detection signal line T or the control signal line SW, a control terminal and a first terminal of the second transistor 42 are both connected to the second terminal of the first transistor 41, and a second terminal of the second transistor 42 is connected to a first fixed voltage signal V2, where polarities of the first fixed voltage signal V2 and the level signal line V1 are opposite.
In particular, fig. 7 shows another embodiment of a dummy cell 40 in a crack detection circuit, the dummy cell 40 in this embodiment being embodied as an electrostatic discharge cell. One electrostatic discharge unit includes two transistors, namely a first transistor 41 and a second transistor 42, wherein a control terminal and a first pole of the first transistor 41 are connected to the level signal line V1, a second pole of the first transistor 41, a control terminal and a first pole of the second transistor 42 are connected to the detection signal line T or the control signal line SW, a second pole of the second transistor 42 is connected to the first fixed voltage signal V2, and optionally, the first fixed voltage signal V2 is a low level signal. When static electricity is accumulated in the detection signal line T, the control signal line SW or the level signal line V1, after the static electricity acts on the first transistor 41 and the second transistor 42, the first transistor 41 and the second transistor 42 are turned on, and the static electricity is conducted to the second pole of the second transistor 42, so that the static electricity is discharged through the static electricity discharging unit, that is, the static electricity is discharged in the dummy unit 40 and is not conducted to the crack detection unit 30, thereby preventing the crack detection unit 30 from being affected by the static electricity to fail, and thus being beneficial to improving the reliability of crack detection of the display panel 100. The structure of the electrostatic discharge unit included in the dummy unit 40 in the present application may be other structures as long as the electrostatic discharge unit can release static electricity, and the present application is not particularly limited thereto.
In an alternative embodiment of the present invention, please continue to refer to fig. 7, the signal input terminal 60 includes a control signal input terminal S1, a level signal input terminal S2, and a detection signal input terminal S3, the control signal input terminal S1 is electrically connected to the control signal line SW, the level signal input terminal S2 is electrically connected to the level signal line V1, and the detection signal input terminal S3 is electrically connected to the detection signal line T.
Specifically, with continued reference to fig. 7, the control signal input terminal S1 is electrically connected to a control signal line SW in the crack detection circuit, and is used for sending a control signal to the control signal line SW, where the control signal is, for example, an ac signal. The level signal input terminal S2 is electrically connected to a level signal line V1 in the crack detection circuit, the detection signal input terminal S3 is electrically connected to a detection signal line T in the crack detection circuit, and when the first switch unit 31 in the crack detection unit 30 is a P-type transistor, the level signal input terminal S2 is configured to transmit a high level signal to the level signal line V1, and the detection signal input terminal S3 is configured to transmit a high level signal to the detection signal line T; when the first switching unit 31 in the crack detecting unit 30 is an N-type transistor, the level signal input terminal S2 is used to transmit a low level signal to the level signal line V1, and the detection signal input terminal S3 is used to transmit a low level signal to the detection signal line T; so that the first switching unit 31 in the crack detection unit 30 maintains an off state when there is no crack in the display panel 100 and so that the first switching unit 31 in the crack detection unit 30 is turned on when there is a crack in the display panel 100.
In an alternative embodiment of the present invention, fig. 8 is a schematic diagram illustrating another structure of the crack detection circuit in the display panel 100 according to the embodiment of the present application, and the level signal input terminal S2 is multiplexed with the detection signal input terminal S3.
Specifically, fig. 8 shows a scheme in which the level signal line V1 and the detection signal line T are connected to the same signal input terminal in the crack detection circuit, that is, the level signal input terminal S2 and the detection signal input terminal S3 are multiplexed to the same signal input terminal, so that the detection signal line T and the level signal line V1 receive the same level signal, which is beneficial to reducing the number of signal input terminals in the display panel 100. When the level signal line V1 and the detection signal line T are connected to the same signal input terminal, the detection signal line T and the level signal line V1 may be shorted together to form a loop, for example, a double-winding structure as shown in fig. 8 may be formed.
In an alternative embodiment of the present invention, please refer to fig. 8, the non-display area 20 further includes a first frame area 22 disposed adjacent to the binding area 21; the crack detection unit 30 and the virtual unit 40 are located in the bonding area 21; the dummy cell 40 is located on a side of the crack detection cell 30 away from the first bezel area 22.
Specifically, fig. 8 shows a case where the display panel 100 includes two crack detection circuits, in the present application, both the crack detection unit 30 and the dummy unit 40 in the crack detection circuit are disposed in the bonding region 21, and the originally idle region in the bonding region 21 is reasonably utilized, so as to avoid a risk that the frame width of the display panel 100 is increased after the crack detection circuit is introduced into the display panel 100. In addition, in the crack detection circuit, the present application places the dummy cell 40 on the side of the crack detection cell 30 away from the first frame region 22, that is, the dummy cell 40 is disposed inside the bind area 21, which is advantageous for increasing the winding length of the sensing signal line T, the level signal line V1 and the control signal line SW, when static electricity is applied to the detection signal line T, the level signal line V1 or the control signal line SW, because the wires have certain resistance, longer wires can consume a part of static electricity to achieve the purpose of voltage division, thereby advantageously reducing the amount of static electricity transferred to the dummy cell 40, and thus advantageously avoiding the possibility of the static electricity being excessively transferred to the crack detection unit 30, therefore, it is more beneficial to avoid the influence of static electricity on the crack detection unit 30, and thus it is more beneficial to improve the reliability of the crack detection process of the display panel 100. Optionally, in order to further reduce the frame, a different-layer wiring manner may be adopted, and the design may be performed according to actual requirements.
It should be noted that, in some alternative embodiments of the present application, the dummy cell 40 may also be located on a side of the crack detection unit 30 close to the first frame region 22, that is, the dummy cell 40 is located outside the crack detection unit 30, when static electricity is accumulated on the detection signal line T, the control signal line SW or the level signal line V1, the static electricity may also be applied to the dummy cell 40 first, and will not affect the crack detection unit 30, so that it is also beneficial to improve the reliability of the crack detection process of the display panel 100.
In an alternative embodiment of the present invention, fig. 9 is a schematic structural diagram of a bonding area 21 in a display panel 100 provided in the embodiment of the present application, where the bonding area 21 includes a plurality of first conductive pad groups P1 and a plurality of second conductive pad groups P2, and along the second direction Y, the second conductive pad group P2 is located on a side of the first conductive pad group P1 close to the display area, the crack detection unit 30 and the dummy unit 40 are located between the first conductive pad group P1 and the second conductive pad group P2, and the signal input terminal 60 is located in the first conductive pad group P1.
Specifically, in the embodiment shown in fig. 9, the first conductive pad group P1 and the second conductive pad group P2 are conductive pad groups for binding the control chip, and in the prior art, along the second direction Y, a part of space between the first conductive pad group P1 and the second conductive pad group P2 is not utilized, and in the present application, the crack detection unit 30 and the dummy unit 40 in the crack detection circuit are disposed between the first conductive pad group P1 and the second conductive pad group P2 in the binding region 21, so that the space in the binding region 21 is reasonably utilized, and the introduction of the crack detection unit 30 and the dummy unit 40 is prevented from increasing the bezel width of the display panel 100. Optionally, in this application, the signal input terminal 60 corresponding to the crack detection circuit may be located in the first conductive pad group P1, and in order not to affect the normal arrangement of other conductive pads in the first conductive pad group P1, the signal input terminal 60 corresponding to the crack detection circuit may be disposed on two sides of the first conductive pad group P1, which is equivalent to adding the signal input terminal 60 on the periphery of the original conductive pad in the first conductive pad group P1, so as to facilitate simplifying the manufacturing process of the display panel 100 after introducing the crack detection circuit into the display panel 100.
Optionally, fig. 10 is a schematic view of another structure of the bonding region 21 in the display panel 100 provided in the embodiment of the present application, in which the display panel 100 is a COF (chip on film or chip on FPC), the bonding region 21 includes a plurality of conductive pads P3, the conductive pads PA of the bonding region 21 are used for bonding an FPC, and the control chip is bonded on the FPC but not on the panel.
At this time, the crack detection unit 30 and the dummy unit 40 in the crack detection circuit are located at the side of the conductive pads close to the display area 10, and the crack detection unit 30 and the dummy unit 40 can be also disposed by using the space of the bonding area 21, thereby implementing the crack detection function of the display panel 100.
In an alternative embodiment of the present invention, fig. 11 is a diagram illustrating a correspondence relationship between the crack detection circuit and the sub-pixels in the display panel 100, wherein the display area 10 of the display panel 100 includes at least three sub-pixels with different colors, and the sub-pixels are electrically connected to the data lines 70; the sub-pixels corresponding to the data lines 70 connected to the crack detection unit 30 have the same color.
Specifically, fig. 11 shows a case where three different color sub-pixels of red, green and blue are included in the display panel 100, that is, a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B are included, wherein the colors of the sub-pixels included in the same pixel column are the same, and the sub-pixels in the same pixel column are electrically connected to the same data line 70. In the present application, the data lines 70 corresponding to the sub-pixels of the same color (for example, green color) are electrically connected to the crack detection units 30 in the crack detection circuit, respectively, when a crack exists on the display panel 100, the crack detection unit 30 electrically connected to the detection signal line T is turned on, and the sub-pixel electrically connected to the data line 70 corresponding to the turned-on crack detection unit 30 emits light, thereby forming a bright line, wherein when the color of the sub-pixel corresponding to the data line 70 connected to the crack detection unit 30 is set to be the same, the color of the bright line is embodied as the color corresponding to the sub-pixel, and when the color of the sub-pixel is green, the color of the bright line is green; when the color of the sub-pixel is red, the color of the bright line is red; when the color of the sub-pixel is blue, the color of the bright line is blue. The bright lines can remind cracks existing in the display panel 100, and in the actual application process, the colors of the bright lines can be set according to actual requirements, which is not specifically limited in the present application.
Based on the same inventive concept, the present application further provides a display device, and fig. 12 is a schematic diagram of the display device provided in the embodiment of the present application, where the display device 200 includes the display panel provided in any one of the embodiments described above in the present application.
It should be noted that, for the embodiments of the display device 200 provided in the embodiments of the present application, reference may be made to the embodiments of the display panel described above, and repeated descriptions are omitted. The display device 200 provided by the present application may be: any product or component with practical functions such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
In summary, the display panel and the display device provided by the invention at least achieve the following beneficial effects:
in the display panel and the display device provided by the invention, at least one crack detection circuit is arranged in a non-display area of the display panel, the crack detection circuit comprises a plurality of crack detection units, at least one virtual unit and at least one first signal wire, the first signal wire is respectively and electrically connected with the signal input end, the crack detection unit and the virtual unit, particularly, the virtual unit is positioned between the crack detection unit and the signal input end in the extending direction of the first signal wire, and therefore, the first signal wire is equivalent to be firstly connected with the virtual unit and then connected with the crack detection unit. When static electricity is accumulated on the first signal wiring, the static electricity is transmitted to the virtual unit through the first signal wiring, and the introduction of the virtual unit reduces the possibility that the static electricity is transmitted to the crack detection unit, so that the possibility that the crack detection unit fails due to the static electricity is greatly reduced, the possibility that the crack detection unit cannot normally detect the crack is further reduced, and the reliability of the crack detection process in the display panel and the display device is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A display panel, comprising a display area and a non-display area, wherein the non-display area comprises a bonding area, and the bonding area comprises a plurality of signal input terminals;
the display panel further comprises a plurality of data lines which are arranged along a first direction and extend along a second direction, and the first direction and the second direction are intersected;
the display panel further comprises at least one crack detection circuit located in the non-display area, one crack detection circuit comprising a plurality of crack detection cells, at least one dummy cell, and at least one first signal line; the crack detection unit and the virtual unit are electrically connected with the first signal wire, and the first signal wire is also electrically connected with the signal input end; the dummy unit is located between the crack detection unit and a signal input terminal in an extending direction of the first signal line;
the binding region comprises a plurality of first conductive pad groups and a plurality of second conductive pad groups, the second conductive pad groups are positioned on one side of the first conductive pad groups close to the display region along a second direction, and the crack detection unit and the virtual unit are positioned between the first conductive pad groups and the second conductive pad groups; along the first direction, the signal input ends are positioned on two sides in the first conductive pad group;
the non-display area further comprises a first frame area which is arranged adjacent to the binding area; the crack detection unit and the virtual unit are positioned in the binding area;
the crack detection unit is included between the virtual unit and the first frame region.
2. The display panel according to claim 1,
the crack detection circuit further comprises a control signal line, a level signal line and a detection signal line, wherein the detection signal line is arranged around the display area;
the crack detection unit comprises a plurality of first switch units, the control end of each first switch unit is connected with the same control signal line, the first end of each first switch unit is electrically connected with different data lines, the second end of at least part of the first switch units is connected with the level signal line, and the second end of at least part of the first switch units is connected with the detection signal line.
3. The display panel according to claim 2, wherein the first signal line is at least one of the control signal line, the level signal line, and the detection signal line.
4. The display panel according to claim 2, wherein the dummy cell includes a second switch cell, a control terminal of the second switch cell is connected to the control signal line, a first terminal is connected to the level signal line, and a second terminal is floating.
5. The display panel of claim 4, wherein the second end of the dummy cell is connected to a metal trace.
6. The display panel according to claim 2, wherein the dummy cell comprises a first capacitor, a first pole of the first capacitor is connected to the level signal line, and a second pole of the first capacitor is connected to the detection signal line.
7. The display panel according to claim 2, wherein the dummy cells include electrostatic discharge cells, one of the electrostatic discharge cells includes a first transistor and a second transistor, a control terminal and a first pole of the first transistor are connected to the level signal line, a second pole of the first transistor is connected to the detection signal line or the control signal line, a control terminal and a first pole of the second transistor are connected to a second pole of the first transistor, and a second pole of the second transistor is connected to a first fixed voltage signal, wherein polarities of signals of the first fixed voltage signal and the level signal line are opposite.
8. The display panel according to claim 2, wherein the signal input terminal includes a control signal input terminal, a level signal input terminal, and a detection signal input terminal, the control signal input terminal is electrically connected to the control signal line, the level signal input terminal is electrically connected to the level signal line, and the detection signal input terminal is electrically connected to the detection signal line.
9. The display panel of claim 8, wherein the level signal input terminal multiplexes the detection signal input terminals.
10. The display panel according to claim 2, wherein the display region includes at least three different color sub-pixels electrically connected to the data lines; and the color of the sub-pixel corresponding to the data line connected with the crack detection unit is the same.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.
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| CN202010599113.3A CN111739453B (en) | 2020-06-28 | 2020-06-28 | Display panel and display device |
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| CN202010599113.3A CN111739453B (en) | 2020-06-28 | 2020-06-28 | Display panel and display device |
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| CN117037650A (en) * | 2020-11-27 | 2023-11-10 | 武汉天马微电子有限公司 | Display panel, detection method thereof and display device |
| CN112378960A (en) * | 2020-12-14 | 2021-02-19 | 霸州市云谷电子科技有限公司 | Display substrate, display screen and crack detection method |
| CN113205758A (en) * | 2021-04-29 | 2021-08-03 | 京东方科技集团股份有限公司 | Display module, crack detection method and display device |
| CN113450652B (en) * | 2021-06-29 | 2022-12-09 | 京东方科技集团股份有限公司 | Panel crack detection assembly, display panel and display device |
| GB2622336A (en) * | 2021-11-29 | 2024-03-13 | Boe Technology Group Co Ltd | Display panel and display device |
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