CN109142447B - Display panel, crack detection method thereof and display device - Google Patents
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Abstract
The invention discloses a display panel, a crack detection method thereof and a display device, wherein the display panel comprises: the display device comprises a display area and a non-display area arranged around the display area; the non-display area comprises a grid drive circuit and a crack detection circuit; the crack detection circuit comprises at least one detection unit; the detection unit comprises an input signal line, an output signal line, a plurality of control signal lines extending along the third direction and a plurality of detection subunits arranged along the second direction, and each detection subunit comprises a control end, an input end and an output end; the control end of the detection subunit is electrically connected with a control signal line, the input end is electrically connected with the input signal line, and the output end is electrically connected with the output signal line. Compared with the prior art, when the input signal is provided for the detection subunit, the position of the crack in the non-display area can be judged by acquiring the output signal of the output signal line, so that the detection efficiency and the detection rate of the crack are improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a crack detection method thereof and a display device.
Background
In the production process of display devices, in order to achieve higher light transmittance, a light and thin substrate such as a glass substrate or a plastic substrate is generally used to fabricate a display screen. The display screen needs to be cut into required size through cutting process at the anterior segment of module technology, receives cutting process's influence, and some crackles are very easily formed to the edge region of display screen, and in the use of carrying out follow-up technology and final product, the crackle is probably to the inside extension of display screen, influences the normal demonstration of display screen.
The existing crack observation methods mainly depend on the visual observation of field observers, and for small-size cracks, the observation needs to be carried out by matching with a microscope, but the methods are quite time-consuming and labor-consuming, and the detection rate is low.
Through the display screen behind the module technology, the microscope can't observe its marginal area's crackle, and this just makes the crackle survey must go on at the anterior segment of module technology, and whether the marginal area of display screen forms the extension condition of crackle and crackle in the use of difficult definite follow-up technology and final products.
Disclosure of Invention
In view of the above, the invention provides a display panel, a crack detection method thereof and a display device.
The present invention provides a display panel, comprising: the display device comprises a display area and a non-display area arranged around the display area; the display area comprises a plurality of scanning lines extending along a first direction; the non-display area comprises a grid drive circuit and a crack detection circuit; the grid driving circuit comprises a plurality of cascaded shift registers, and the output end of each shift register is electrically connected with one scanning line; the crack detection circuit comprises at least one detection unit;
the detection unit comprises an input signal line, an output signal line, a plurality of control signal lines extending along the third direction and a plurality of detection subunits arranged along the second direction, and each detection subunit comprises a control end, an input end and an output end; a control signal line is electrically connected with the output end of a shift register; the control end of the detection subunit is electrically connected with a control signal line, the input end of the detection subunit is electrically connected with an input signal line, and the output end of the detection subunit is electrically connected with an output signal line; the first direction and the second direction intersect.
The invention provides a display device which comprises a display panel provided by the invention.
The invention also provides a crack detection method, which is applied to the display panel provided by the invention and comprises at least one detection stage, wherein each detection stage comprises the following steps:
controlling the shift register to provide control signals for the control end of the detection subunit step by step so as to conduct the detection subunit step by step;
providing an input signal for an input end of the detection subunit through an input signal line;
acquiring output signals of the output end of the detection subunit step by step through an output signal line;
judging whether the output signal and the input signal of the detection subunit acquired step by step are the same, if so, judging that the line where the detection subunit is located is a normal line; if not, detecting that the line in which the subunit is positioned is an abnormal line;
and determining the crack position of the display panel according to the normal line and the abnormal line.
Compared with the prior art, the display panel, the crack detection method thereof and the display device provided by the invention at least realize the following beneficial effects:
the crack detection circuit is arranged in the non-display area of the display panel, the control end of each detection subunit in the crack detection circuit is provided with a control signal by a control signal line, and the control signal line is electrically connected with the output end of the shift register, so that whether the detection subunits are conducted or not can be controlled step by the shift register. When providing input signal for detecting the subunit, can judge the position that is located the non-display area crackle through the output signal who obtains the output signal line, improved detection efficiency and the relevance ratio of crackle to can also not receive the extension condition of module technology restriction real-time detection crackle, be favorable to further improving the yield of product, ensure display panel's normal demonstration. The number of the detection units in the crack detection circuit can be set according to actual conditions, and the narrow frame of the display panel is favorably realized.
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 schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged view of region M of FIG. 1;
FIG. 3 is an enlarged schematic view of the detecting unit in FIG. 2;
fig. 4 is a connection diagram of a gate driving circuit according to an embodiment of the invention;
FIG. 5 is a schematic view of another enlarged structure of the region M in FIG. 1;
FIG. 6 is a schematic cross-sectional view of the detecting unit in FIG. 5;
FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic partial cross-sectional view of the display panel shown in FIG. 7;
fig. 9 is a schematic plan view illustrating a display panel according to another embodiment of the present invention;
fig. 10 is a schematic plan view illustrating a display panel according to another embodiment of the present invention;
fig. 11 is a schematic plan view illustrating a display panel according to another embodiment of the present invention;
fig. 12 is a schematic plan view illustrating a display panel according to another embodiment of the present invention;
fig. 13 is a schematic plan view illustrating a display panel according to another embodiment of the present invention;
FIG. 14 is a flow chart of a crack detection method provided by an embodiment of the invention;
FIG. 15 is a timing diagram illustrating the comparison of input signals and output signals according to an embodiment of the present invention;
FIG. 16 is a timing diagram illustrating an alternative input signal to output signal comparison provided by an embodiment of the present invention;
FIG. 17 is a schematic view of a further enlarged structure of region M of FIG. 1;
FIG. 18 is a schematic view of a further enlarged structure of region M of FIG. 1;
FIG. 19 is a schematic view of a further enlarged structure of region M of FIG. 1;
FIG. 20 is a flow chart of another crack detection method provided by embodiments of the present invention;
fig. 21 is a schematic structural diagram of a display device according to an embodiment of the present invention.
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.
Referring to fig. 1, fig. 2 and fig. 3, the present invention provides a display panel, including: a display area AA and a non-display area BB arranged around the display area; the display area AA includes a plurality of scan lines GL extending in the first direction x; the non-display area BB includes the gate drive circuit 10 and the crack detection circuit 20; the gate driving circuit 10 includes a plurality of cascaded shift registers 11, and an output terminal of the shift register 11 is electrically connected to one scanning line GL; the crack detection circuit 20 comprises at least one detection unit 21;
the detection unit 21 comprises an input signal line 22, an output signal line 23, a plurality of control signal lines 24 extending along the third direction z, and a plurality of detection subunits 25 arranged along the second direction y, wherein the detection subunits 25 comprise a control terminal C, an input terminal I and an output terminal O; a control signal line 24 electrically connected to an output terminal of the shift register 11; the control end C of the detection subunit 25 is electrically connected with a control signal line 24, the input end I of the detection subunit 25 is electrically connected with the input signal line 22, and the output end O of the detection subunit 25 is electrically connected with the output signal line 23; the first direction x and the second direction y intersect.
It should be noted that the plurality of control signal lines 24 extend along the third direction z, where the third direction z may intersect with at least one of the first direction x and the second direction y, which is not specifically limited in this disclosure.
The control terminal C, the input terminal I, and the output terminal O of the detection subunit 25 are electrically connected to the control signal line 24, the input signal line 22, and the output signal line 23, respectively, but the input signal line 22 and the control signal line 24, and the output signal line 23 and the control signal line 24 should be insulated from each other.
The plurality of shift registers 11 are cascaded, and the output end of the shift register 11 is electrically connected with one scanning line GL, so that the scanning function of the display area AA is realized. Specifically, referring to fig. 4, the trigger signal input end of the first stage shift register 11 is configured to receive the start signal STV, and from the second stage shift register 11, the trigger signal input end of the next stage shift register 11 is electrically connected to the output end of the previous stage shift register 11 to output a scanning signal to the scanning line GL step by step to drive the display area AA to display an image, where the scanning signal may be a forward scanning signal or a reverse scanning signal, which is not limited in this embodiment of the invention.
Since one control signal line 24 is also electrically connected to the output terminal of a corresponding one of the shift registers 11 in the crack detection circuit 20 located in the non-display area BB, the shift register 11 outputs a scanning signal to the scanning lines GL step by step and also outputs a control signal to the control signal line 24 step by step to turn on the detection subunit 25 step by step.
An input end I and an output end O of the detection subunit 25 are respectively and electrically connected with the input signal line 22 and the output signal line 23, wherein the input signal line 22 can provide an input signal for the detection subunit 25, in the step-by-step conduction process of the detection subunit 25, each detection subunit 25 can output a corresponding output signal through the output signal line 23, whether a line where each detection subunit 25 is located is a normal line can be judged through the output signal, and if the line is a normal line, the line is located in a crack-free area; if the line is an abnormal line, the line is in a crack region. Therefore, the crack position in the non-display area BB can be determined by analyzing whether the crack detection circuit 20 detects the line in which the sub-unit 25 is normal or not.
In the display panel provided by this embodiment, the crack detection circuit is disposed in the non-display area of the display panel, the control end of each detection subunit in the crack detection circuit is provided with the control signal by the control signal line, and the control signal line is electrically connected to the output end of the shift register, so that whether the detection subunit is turned on or not can be controlled step by the shift register. When providing input signal for detecting the subunit, can judge the position that is located the non-display area crackle through the output signal who obtains the output signal line, improved detection efficiency and the relevance ratio of crackle to can also not receive the extension condition of module technology restriction real-time detection crackle, be favorable to further improving the yield of product, ensure display panel's normal demonstration. The number of the detection units in the crack detection circuit can be set according to actual conditions, and the narrow frame of the display panel is favorably realized.
In some alternative embodiments, please continue to refer to fig. 2, the scan lines GL extend to the non-display area BB to form an extension portion G1, and the extension portion G1 is multiplexed as the control signal line 24. At this time, the control signal line 24 and the scanning line GL are located in the same film layer, so that the control signal line 24 and the scanning line GL can be patterned together without adding another film layer, which is beneficial to reducing the process difficulty and realizing the lightness and thinness of the display panel.
Of course, the control signal lines 24 may be located on different layers from the scan lines GL without considering the process difficulty and the size of the display panel.
In some alternative embodiments, referring to fig. 5 and 6, the detecting sub-unit 25 includes a thin film transistor T disposed on the substrate 40, a gate T3 of the thin film transistor T is electrically connected to a control signal line 24, a first pole T1 of the thin film transistor T is electrically connected to the input signal line 22, and a second pole T2 of the thin film transistor T is electrically connected to the output signal line 23.
In the present embodiment, only one detection subunit 25 including one thin film transistor T is described as an example, and the thin film transistor T can provide the detection subunit 25 with a switching characteristic. Referring to fig. 3, the gate T3 of the tft T serves as the control terminal C of the detecting sub-unit 25, and the first pole T1 of the tft T serves as the input terminal I or the output terminal O of the detecting sub-unit 25. Wherein, when the first pole T1 is used as the input terminal I, the second pole T2 is used as the output terminal O; alternatively, when the first pole T1 is used as the output terminal O, the second pole T2 is used as the input terminal I.
The first and second electrodes T1 and T2 of the thin film transistor T are electrically connected to the active layer T4, thereby enabling it to exhibit superior switching characteristics. When the line on which the thin film transistor T is located is in the crack-free region, the output signal of the output signal line 23 is the same as the input signal supplied from the input signal line 22; when the circuit on which the thin film transistor T is located is in the crack region, the output signal of the output signal line 23 will differ from the input signal provided by the input signal line 22, and the existence of the crack, even the approximate position of the crack, can be determined according to the difference, which is beneficial to improving the detection efficiency and ensuring the yield of the product.
Alternatively, the detecting subunit 25 may also be a combination of a plurality of thin film transistors T, a combination of a thin film transistor T and other elements, and the like, which is not particularly limited in this embodiment.
The thin film transistor T is generally divided into an N-type transistor and a P-type transistor, where the N-type transistor is turned on under the control of a high level signal and turned off under the control of a low level signal; the P-type transistor is turned on under the control of the low level signal and turned off under the control of the high level signal, which is not specifically limited in the present invention, and the description is given only by taking each thin film transistor T as an N-type transistor as an example, and will not be described in detail later.
According to the type of the thin film transistor T and a signal of the gate T3 thereof, the first pole T1 may be used as a source thereof, and the second pole T2 may be used as a drain thereof; alternatively, the first pole T1 may be used as its drain, and the second pole T2 may be used as its source, which is not limited in this embodiment.
Alternatively, as shown in fig. 5, the pitch between the tfts T is 50-100 μm. In this embodiment, the distance between the thin film transistors T is a distance between two adjacent thin film transistors T in the first direction x and/or the second direction y, and when the distance is 50 to 100 μm, the accuracy of determining the shape and position of the crack can be further improved according to the input signal and the output signal, so as to improve the detection efficiency.
The number of the thin film transistors T may be set according to an actual detection situation, and the embodiment does not specifically limit this.
In some alternative embodiments, please refer to fig. 7 and 8, the display area AA further includes a plurality of data lines DL extending along the second direction y; the input signal line 22 and the output signal line 23 are located in the same film layer as the data line DL. It should be noted that, in order to more intuitively illustrate the technical solution of the present embodiment, only one detection unit 21 is illustrated in the planar structure shown in fig. 7, but of course, in the case that the width of the non-display area BB is large, the number of the detection units 21 may be multiple as shown in fig. 5, and the present embodiment does not specifically limit this.
In general, in the display area AA, a switching element is disposed at an intersection of the data line DL and the scan line GL, a control terminal and an input terminal of the switching element are respectively connected to the scan line GL and the data line DL, the switching element may be a thin film transistor T ', and source and drain electrodes of the data line DL and the thin film transistor T' are located in the same film layer. In this embodiment, the input signal line 22 and the output signal line 23 are disposed on the same film layer as the data line DL, and since the thin film transistor T and the thin film transistor T' have the same structure, the input signal line 22 and the output signal line 23 can be patterned together with the data line DL, the first electrode T1, and the second electrode T2, without adding additional film layers, which is beneficial to reducing the process difficulty and realizing the lightness and thinness of the display panel.
Of course, when the number of the display panel films is large, at least one of the input signal lines 22 and the output signal lines 23 may be located on a different film from the first pole T1 (or the second pole T2), so as to flexibly adjust the arrangement of the signal lines according to actual conditions and improve the utilization rate of other film layers of the display panel. For example, referring to fig. 6, the input signal line 22 and the output signal line 23 are both located at different layers from the first pole T1 (or the second pole T2), the input signal line 22 can be electrically connected to the first pole T1 through the via 50, and the output signal line 23 can be electrically connected to the second pole T2 through the via 50.
In some optional embodiments, please refer to fig. 9, there are two crack detection circuits 20, and the two crack detection circuits 20 are located at two opposite sides of the display area AA, so as to detect whether there are cracks and crack extension conditions in the non-display areas located at two sides of the display area AA in real time, improve the yield of the product, and ensure the normal display of the display panel. The number of detection units 21 in each side crack detection circuit 20 may be the same or may also be different; one or more gate driving circuits 10 may be provided, and this embodiment does not specifically limit this.
Optionally, there are two crack detection circuits 20, the two crack detection circuits 20 are located on two opposite sides of the display area AA, there are two gate driving circuits 10, each gate driving circuit 10 is located between the crack detection circuit 20 and the display area AA, and the gate driving circuits 10 provide scanning signals for two ends of the scanning lines GL on one hand and provide control signals for the control signal lines 24 on the other hand to turn on the detection subunits 25 in the crack detection circuits 20. The gate driving circuit 10 may have a plurality of connection methods between the shift register 11 and the scanning lines GL, so as to meet a plurality of driving requirements of the display panel and ensure the detection efficiency and the detection rate of cracks, for example, as shown in fig. 9, both ends of each scanning line GL are electrically connected to the shift register 11; as shown in fig. 10, the shift register 11 on one side of the display area AA is electrically connected to one end of the m-th scan line GL, and the shift register 11 on the other side of the display area AA is electrically connected to one end of the n-th scan line GL, where m is an odd number and n is an even number.
Optionally, referring to fig. 11, there are two crack detection circuits 20, the two crack detection circuits 20 are located at two opposite sides of the display area AA, only one gate driving circuit 10 is provided, the gate driving circuit 10 is located between one crack detection circuit 20 and the display area AA, and the shift register 11 in the gate driving circuit 10 provides a unidirectional scanning signal for the scanning line GL on one hand and still provides a control signal line 24 on the other hand to turn on the detection subunit 25 in the crack detection circuit 20.
In some alternative embodiments, please refer to fig. 12, the display panel further includes a bending region Z, and the crack detection circuit 20 is located in the bending region Z. The display panel is bent through the bending area Z, once cracks appear in a non-display area located in the bending area Z, the cracks tend to extend towards a certain direction along with the increase of the bending operation times, and the crack detection circuit 20 is arranged in the bending area Z, so that the positions and the extension conditions of the cracks can be detected in real time, the crack generation prevention or the display panel design scheme and the process conditions can be found out in favor of timely adjusting, the crack diffusion is delayed, and the yield of products is improved.
In this embodiment, the number of the bending zones Z may be one, or a plurality of bending zones Z may be provided according to actual needs.
In some alternative embodiments, as shown in fig. 13, the non-display area BB further includes a bonding area 30, the bonding area 30 includes a plurality of conductive pads 31, and the input signal line 22 and the output signal line 23 are electrically connected to the conductive pads 31, respectively. Therefore, the detection subunit 25 can be provided with input signals through the driving chip of the binding region 30, and output signals of the detection subunit 25 are received, and when the detection subunit 25 is conducted step by step under the action of the shift register 11, the position of a BB crack in the non-display region can be determined according to the obtained output signals, so that the detection efficiency and the detection rate of the crack are effectively improved.
Of course, the input signal line 22 and the output signal line 23 may also be electrically connected to a signal transceiver outside the display panel, and the position of the non-display area BB crack is determined directly by analyzing the transmitted and received signals of the signal transceiver without changing the setting of the bonding area 30, which is beneficial to simplifying the manufacturing process of the display panel, but this embodiment does not specifically limit this.
Referring to fig. 1-3 and fig. 14 in combination, the present invention provides a crack detection method applied to the display panel provided by the present invention, including at least one detection stage, each detection stage including:
s141, controlling the shift register 11 to provide control signals for the control end C of the detection subunit 25 step by step so as to turn on the detection subunit 25 step by step;
s142, providing an input signal for an input end I of the detection subunit 25 through the input signal line 22;
s143, acquiring the output signal of the output end O of the detection subunit 25 step by step through the output signal line 23;
s144, judging whether the output signal and the input signal of the detection subunit 25 acquired step by step are the same, if so, judging that the circuit in which the detection subunit 25 is positioned is a normal circuit; if not, detecting that the line in which the subunit 25 is located is an abnormal line;
and S145, determining the crack position of the display panel according to the normal line and the abnormal line.
In the crack detection method provided in this embodiment, at least one detection stage may be set according to actual needs, which is not specifically limited in this embodiment, and only one detection stage is set as an example for description.
Specifically, the shift register 11 outputs the scanning signal to the scanning line GL step by step, and also outputs the control signal to the control signal line 24 step by step to turn on the detecting sub-unit 25 step by step. In the process of conducting the detection subunits 25 step by step, the input signal line 22 provides an input signal for the detection subunits 25, and whether the line where each detection subunit 25 is located is a normal line can be judged by obtaining the output signal of the output signal line 23, and if the line is a normal line, the line is in a crack-free area; if the line is an abnormal line, the line is in a crack region. Therefore, the position of the BB crack in the non-display area can be judged by analyzing whether the lines of all the detection subunits 25 of the crack detection circuit 20 are normal or not, the detection efficiency and the detection rate of the crack are improved, the extending condition of the crack can be detected in real time without being limited by a module process, the yield of products is further improved, and the normal display of the display panel is ensured.
In some optional embodiments, the input signal is one of a square wave, a simple harmonic wave, and a sawtooth wave. In this embodiment, a detecting subunit includes a thin film transistor, and the input signal is a square wave, for example, the following is described: referring to fig. 5 and fig. 15, when the shift register 11 outputs a scan signal to the first scan line GL, the on-time of the first thin film transistor T in the detection unit 21 is T1, and when the shift register 11 outputs a scan signal to the second scan line GL, the on-time of the second thin film transistor T in the detection unit 21 is T2 …, and so on, and when the lines on which each thin film transistor T in the detection unit 21 is located are all normal lines, the output signal out is a square wave identical to the input signal in.
When the route of the thin film transistor T in the detection unit 21 is an abnormal line, please refer to fig. 16, the output signal out is a low-potential signal during the on-time of the thin film transistor T.
Referring to fig. 17, the control signal line 24 is located in the region where the crack L is located, the thin film transistor T on the line passing through the crack L cannot be turned on, and the output signal line 23 outputs a low-potential signal.
Referring to fig. 18, the input signal line 22 is located in the region where the crack L is located, the thin film transistor T on which the line passes through the crack L cannot receive the signal, and the output signal line 23 outputs a low-potential signal.
Referring to fig. 19, the output signal line 23 is located in the region where the crack L is located, the thin film transistor T on which the line passes through the crack L cannot output a signal at this time, and the output signal line 23 outputs a low potential signal.
Of course, the circuit on which the thin film transistor T is located may be an abnormal circuit, and the present embodiment is described by taking the above three cases as an example.
In some optional embodiments, please refer to fig. 5 and 20 in combination, the crack detection method provided by the present invention includes at least two detection stages, and a zero clearing stage is disposed between two adjacent detection stages, and the zero clearing stage includes:
the input of the detection subunit 25 is supplied with a first constant voltage signal via an input signal line 22 and the output of the detection subunit 25 is supplied with a second constant voltage signal via an output signal line 23.
In this embodiment, it is still exemplified that one detecting subunit 25 includes one thin film transistor T, and the input signal is a square wave: in the detection phase, the signal output condition of the output signal line 23 is as described above; in the zero clearing stage, the first constant voltage signal and the second constant voltage signal are respectively provided for the input signal line 22 and the output signal line 23, so that the input signal and the output signal of the previous detection stage are prevented from influencing the input signal and the output signal of the next detection stage, and the detection precision is improved.
The crack detection circuit only works when cracks need to be detected, and the time interval between two adjacent detection stages can be set according to actual detection needs, which is not particularly limited in this embodiment.
Optionally, the first constant voltage signal and the second constant voltage signal have the same voltage amplitude. For example, the first constant voltage signal and the second constant voltage signal are both zero potential signals, that is, the initial input/output signal in the later detection stage is a zero potential signal, so that the output signal obtained from the output signal line 23 can be compared with the input signal more intuitively, and whether the line where the detection subunit 25 is located is a normal line or not can be judged, which is beneficial to improving the detection efficiency.
The invention also provides a display device which comprises the display panel provided by the invention.
Referring to fig. 21, a display device 200 of the present embodiment includes the display panel 100 according to any one of the above embodiments of the present invention. Fig. 21 illustrates the display device 200 by taking a mobile phone as an example. It is understood that the display device 200 provided in the embodiment of the present invention may also be a tablet, a computer, a television, a vehicle-mounted display, or other display devices with a display function, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
According to the embodiment, the display panel, the crack detection method thereof and the display device provided by the invention at least realize the following beneficial effects:
the crack detection circuit is arranged in the non-display area of the display panel, the control end of each detection subunit in the crack detection circuit is provided with a control signal by a control signal line, and the control signal line is electrically connected with the output end of the shift register, so that whether the detection subunits are conducted or not can be controlled step by the shift register. When providing input signal for detecting the subunit, can judge the position that is located the non-display area crackle through the output signal who obtains the output signal line, improved detection efficiency and the relevance ratio of crackle to can also not receive the extension condition of module technology restriction real-time detection crackle, be favorable to further improving the yield of product, ensure display panel's normal demonstration. The number of the detection units in the crack detection circuit can be set according to actual conditions, and the narrow frame of the display panel is favorably realized.
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 (12)
1. A display panel, comprising: the display device comprises a display area and a non-display area arranged around the display area; the display area comprises a plurality of scanning lines extending along a first direction;
the non-display area comprises a grid drive circuit and a crack detection circuit; the grid driving circuit comprises a plurality of cascaded shift registers, and the output end of each shift register is electrically connected with one scanning line; the crack detection circuit comprises at least one detection unit;
the detection unit comprises an input signal line, an output signal line, a plurality of control signal lines extending along a third direction and a plurality of detection subunits arranged along a second direction, wherein each detection subunit comprises a control end, an input end and an output end;
one of the control signal lines is electrically connected with an output end of one of the shift registers;
the control end of the detection subunit is electrically connected with one control signal line, the input end of the detection subunit is electrically connected with the input signal line, and the output end of the detection subunit is electrically connected with the output signal line; the scanning lines extend to the non-display area to form extension parts which are multiplexed as the control signal lines;
the first direction and the second direction intersect.
2. The display panel according to claim 1,
the detection subunit comprises a thin film transistor arranged on the substrate, the grid electrode of the thin film transistor is electrically connected with one control signal line, the first pole of the thin film transistor is electrically connected with the input signal line, and the second pole of the thin film transistor is electrically connected with the output signal line.
3. The display panel according to claim 2,
the distance between the thin film transistors is 50-100 mu m.
4. The display panel according to claim 1,
the display panel comprises a display area, two crack detection circuits and a control circuit, wherein the two crack detection circuits are positioned on two opposite sides of the display area.
5. The display panel according to claim 1,
the display panel further comprises a bending area, and the crack detection circuit is located in the bending area.
6. The display panel according to claim 1,
the display area also comprises a plurality of data lines extending along a second direction;
the input signal line and the output signal line are located on the same film layer as the data line.
7. The display panel according to claim 1,
the non-display area further comprises a binding area, the binding area comprises a plurality of conductive bonding pads, and the input signal line and the output signal line are electrically connected with the conductive bonding pads respectively.
8. A display device characterized by comprising the display panel according to any one of claims 1 to 7.
9. Crack detection method applied to the display panel according to any of claims 1 to 7, characterized in that it comprises at least one detection phase, each of said detection phases comprising:
controlling the shift register to provide control signals for the control end of the detection subunit step by step so as to conduct the detection subunit step by step, wherein the output end of the shift register is also electrically connected with a scanning line, the scanning line extends to the non-display area to form an extension part, and the extension part is multiplexed into a control signal line for providing control signals for the control end of the detection subunit;
providing an input signal to the input terminal of the detection subunit through the input signal line;
acquiring the output signal of the output end of the detection subunit step by step through the output signal line;
judging whether the output signal and the input signal of the detection subunit acquired step by step are the same, if so, determining that the line of the detection subunit is a normal line; if not, the line where the detection subunit is located is an abnormal line;
and determining the crack position of the display panel according to the normal line and the abnormal line.
10. The method of claim 9,
the input signal is one of a square wave, a simple harmonic wave and a sawtooth wave.
11. The method of claim 9,
the method comprises at least two detection stages, wherein a zero clearing stage is arranged between two adjacent detection stages, and the zero clearing stage comprises the following steps:
the input end of the detection subunit is provided with a first constant voltage signal through the input signal line, and the output end of the detection subunit is provided with a second constant voltage signal through the output signal line.
12. The method of claim 11,
the first constant voltage signal and the second constant voltage signal have the same voltage amplitude.
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Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752421B (en) * | 2019-01-31 | 2021-08-24 | 厦门天马微电子有限公司 | Display panel and display device |
| CN109817131A (en) * | 2019-02-19 | 2019-05-28 | 京东方科技集团股份有限公司 | Crack detection circuit, method and display device |
| CN110168364B (en) * | 2019-03-27 | 2021-02-05 | 京东方科技集团股份有限公司 | Biological detection chip, biological detection device and detection method thereof |
| CN110211493A (en) * | 2019-04-12 | 2019-09-06 | 上海天马微电子有限公司 | Flexible display panel and flexible display device |
| CN110164344B (en) * | 2019-06-06 | 2022-09-16 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN110333268A (en) * | 2019-07-11 | 2019-10-15 | 京东方科技集团股份有限公司 | A kind of display panel, display device and crack detecting method |
| CN110838273B (en) * | 2019-11-21 | 2022-06-10 | 武汉天马微电子有限公司 | Crack detection method for display panel |
| CN110853558B (en) * | 2019-12-19 | 2023-05-12 | 京东方科技集团股份有限公司 | Flexible display screen, detection method thereof and display device |
| CN111044578B (en) * | 2019-12-31 | 2022-10-28 | 厦门天马微电子有限公司 | Display panel, crack position positioning method thereof and display device |
| CN111223408B (en) * | 2020-02-11 | 2022-03-25 | 京东方科技集团股份有限公司 | Display panel, edge damage detection method, preparation method and display device |
| CN111192543B (en) * | 2020-02-28 | 2022-05-17 | 武汉天马微电子有限公司 | Display panel, display device and crack detection method |
| CN111696459B (en) * | 2020-05-26 | 2023-10-20 | 京东方科技集团股份有限公司 | Detection module, crack detection method, display panel and display device |
| CN111739453B (en) * | 2020-06-28 | 2022-05-17 | 武汉天马微电子有限公司 | Display panel and display device |
| KR20220003735A (en) * | 2020-07-02 | 2022-01-11 | 엘지디스플레이 주식회사 | Display device, and driving circuit |
| CN114255680B (en) * | 2020-09-24 | 2024-05-17 | 华为技术有限公司 | Display device, detection method thereof, storage medium, display driving chip and device |
| CN112259587B (en) * | 2020-10-21 | 2024-02-20 | 京东方科技集团股份有限公司 | Display panel, manufacturing method, detection method and display device |
| CN114945968A (en) * | 2020-10-27 | 2022-08-26 | 京东方科技集团股份有限公司 | Display substrate, detection method thereof and display device |
| CN112885845A (en) * | 2021-01-15 | 2021-06-01 | 京东方科技集团股份有限公司 | Crack detection method, display substrate and display device |
| CN113112940B (en) * | 2021-04-15 | 2023-12-05 | 京东方科技集团股份有限公司 | Display panel |
| KR20220166403A (en) * | 2021-06-09 | 2022-12-19 | 삼성디스플레이 주식회사 | Display apparatus |
| CN115116389A (en) * | 2022-06-27 | 2022-09-27 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN115620652A (en) * | 2022-10-26 | 2023-01-17 | 上海天马微电子有限公司 | Electronic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535620A (en) * | 2015-01-16 | 2015-04-22 | 友达光电(厦门)有限公司 | Display panel and crack detection method thereof |
| CN105679215A (en) * | 2014-11-19 | 2016-06-15 | 昆山国显光电有限公司 | Display screen and crack detection method thereof |
| CN105955536A (en) * | 2016-05-16 | 2016-09-21 | 厦门天马微电子有限公司 | Array substrate, touch display device and driving method thereof |
| CN106448522A (en) * | 2016-10-20 | 2017-02-22 | 京东方科技集团股份有限公司 | Detection circuit, gate drive circuit and display panel |
| CN106657829A (en) * | 2016-12-09 | 2017-05-10 | 南京邮电大学 | Reading circuit and reading method for high-density single-photon avalanche diode (SPAD) array-level analog signals |
| CN107680481A (en) * | 2016-08-01 | 2018-02-09 | 三星显示有限公司 | Display device |
| CN108417561A (en) * | 2018-03-06 | 2018-08-17 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102343654B1 (en) * | 2015-03-31 | 2021-12-27 | 삼성디스플레이 주식회사 | Display device |
| CN105425486B (en) * | 2015-12-11 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of array substrate and display panel |
| CN106681074B (en) * | 2017-02-24 | 2019-10-25 | 深圳市华星光电半导体显示技术有限公司 | Array substrate and liquid crystal display panel |
-
2018
- 2018-08-30 CN CN201811003362.0A patent/CN109142447B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679215A (en) * | 2014-11-19 | 2016-06-15 | 昆山国显光电有限公司 | Display screen and crack detection method thereof |
| CN104535620A (en) * | 2015-01-16 | 2015-04-22 | 友达光电(厦门)有限公司 | Display panel and crack detection method thereof |
| CN105955536A (en) * | 2016-05-16 | 2016-09-21 | 厦门天马微电子有限公司 | Array substrate, touch display device and driving method thereof |
| CN107680481A (en) * | 2016-08-01 | 2018-02-09 | 三星显示有限公司 | Display device |
| CN106448522A (en) * | 2016-10-20 | 2017-02-22 | 京东方科技集团股份有限公司 | Detection circuit, gate drive circuit and display panel |
| CN106657829A (en) * | 2016-12-09 | 2017-05-10 | 南京邮电大学 | Reading circuit and reading method for high-density single-photon avalanche diode (SPAD) array-level analog signals |
| CN108417561A (en) * | 2018-03-06 | 2018-08-17 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
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| Publication number | Publication date |
|---|---|
| CN109142447A (en) | 2019-01-04 |
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