CN113487970A - Display panel, crack detection method thereof and mobile terminal - Google Patents
Display panel, crack detection method thereof and mobile terminal Download PDFInfo
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- CN113487970A CN113487970A CN202110822988.XA CN202110822988A CN113487970A CN 113487970 A CN113487970 A CN 113487970A CN 202110822988 A CN202110822988 A CN 202110822988A CN 113487970 A CN113487970 A CN 113487970A
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- 239000010409 thin film Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000523 sample Substances 0.000 claims description 19
- 230000002159 abnormal effect Effects 0.000 claims description 4
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The embodiment of the invention discloses a display panel, a crack detection method thereof and a mobile terminal; the display panel comprises a detection wiring, a plurality of scanning lines, a first thin film transistor and a first terminal, wherein the first thin film transistor and the first terminal are arranged in the non-display area; according to the embodiment of the invention, the first thin film transistor connected with the detection scanning line and the first terminal is arranged, so that the pixels and the detection wires in the display area can be conducted with the detection wires through the first thin film transistor, the brightness change of the corresponding pixels is detected, the crack detection is carried out on the display panel, the crack detection process is simplified, and the cost is saved.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel, a crack detection method thereof and a mobile terminal.
Background
In recent years, the quality of the display panel is more and more emphasized, when the display panel is manufactured, the display panel is cut by a manufacturing process, cracks can be generated on the display panel by cutting the display panel, and the display area cannot be displayed, so that the finished product of the display panel has a crack detection link, and a crack detection method for detecting voltage by using a voltmeter through an external comparator is complex and has high cost.
Therefore, a display panel, a crack detection method thereof, and a mobile terminal are needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the invention provides a display panel, a crack detection method thereof and a mobile terminal, which can solve the technical problems that the conventional crack detection method for detecting voltage by a voltmeter through an external comparator is complex and high in cost.
The embodiment of the invention provides a display panel, which comprises a display area and a non-display area positioned at the periphery of the display area; wherein the display panel includes:
the detection wiring is arranged in the non-display area;
a plurality of scanning lines arranged in the display area;
the first thin film transistor is arranged in the non-display area and comprises a first grid electrode, a first source electrode and a first drain electrode, the first source electrode is electrically connected with a detection scanning line in the scanning lines, the first grid electrode is electrically connected with a first electric signal source, and the first electric signal source is used for providing voltage for driving the first grid electrode to be in a working state;
a first terminal electrically connected to the first drain electrode;
when the display panel is used for crack detection, the first terminal is electrically connected with the detection wiring; when the display panel is used for displaying, the first terminal and the detection wiring are arranged in an insulating mode.
In an embodiment, the display panel further includes a first conductive line connecting the first terminal and the first drain, and the first conductive line and the detection scan line are disposed in different layers.
In an embodiment, the display panel further includes a second terminal and a third terminal electrically connected to two ends of the detection trace, the first terminal and the second terminal are disposed in an insulated manner and located at a first end portion of the display panel, and the third terminal is located at a second end portion of the display panel opposite to the first end portion.
In one embodiment, the display panel further includes a fourth terminal at the second end portion, the fourth terminal being disposed to be insulated from the third terminal; the first end of the detection scanning line is electrically connected with the first terminal, and the second end of the detection scanning line is electrically connected with the fourth terminal.
In one embodiment, the detection scan line is a first scan line close to the first terminal.
In an embodiment, the display panel further includes at least one segment unit located on the detection trace, the segment unit disconnects the detection trace, the segment unit includes two segment terminals, when the display panel is used for crack detection, the two corresponding segment terminals are electrically connected, and when the display panel is used for display, the two corresponding segment terminals are arranged in an insulating manner.
In an embodiment, the display panel further includes a second thin film transistor connected to two corresponding segment terminals, the second thin film transistor includes a second gate, a second source and a second drain, the second source is electrically connected to one of the segment terminals, the second drain is electrically connected to another corresponding segment terminal, the second gate is electrically connected to a second electrical signal source, and the second electrical signal source is configured to provide a voltage for driving the second gate to operate.
The embodiment of the invention also provides a crack detection method of a display panel, which comprises the following steps:
providing a display panel, wherein the display panel comprises a display area and a non-display area positioned at the periphery of the display area; the display panel includes: the detection wiring is arranged in the non-display area; a plurality of scanning lines arranged in the display area; the first thin film transistor is arranged in the non-display area and comprises a first grid electrode, a first source electrode and a first drain electrode, the first source electrode is electrically connected with a detection scanning line in the scanning lines, the first grid electrode is electrically connected with a first electric signal source, and the first electric signal source is used for providing voltage for driving the first grid electrode to be in a working state; a first terminal electrically connected to the first drain electrode;
electrically connecting the first terminal with the detection trace;
inputting a voltage signal for electrically connecting the first source and the first drain to the first gate by using the first electric signal source, so that the detection scanning line is electrically connected to the first terminal;
inputting a detection signal at one end of the detection wiring far away from the first terminal to obtain first brightness of sub-pixels corresponding to the detection scanning lines in the display panel;
when the first brightness is larger than zero, the display panel is a normal display panel, and when the first brightness is equal to zero, the display panel is an abnormal display panel.
In an embodiment, the display panel further includes a second terminal and a third terminal electrically connected to two ends of the detection trace, the first terminal and the second terminal are disposed in an insulating manner and located at a first end portion of the display panel, the third terminal is located at a second end portion of the display panel opposite to the first end portion, and the step of electrically connecting the first terminal and the detection trace includes:
providing a detection jig comprising a first probe and a second probe, wherein the first probe and the second probe are connected with each other;
electrically connecting the first probe to the first terminal and electrically connecting the second probe to the second terminal.
The embodiment of the invention also provides a mobile terminal, which comprises the display panel and a terminal main body, wherein the terminal main body and the display panel are combined into a whole.
According to the embodiment of the invention, the first thin film transistor connected with the detection scanning line and the first terminal is arranged, so that the pixels and the detection wires in the display area can be conducted with the detection wires through the first thin film transistor, the brightness change of the corresponding pixels is detected, the crack detection is carried out on the display panel, the crack detection process is simplified, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic top view illustrating a first structure of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a portion of a second structure of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic top view illustrating a third structure of a display panel according to an embodiment of the invention;
FIG. 4 is a schematic top view illustrating a fourth structure of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic top view illustrating a fifth structure of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic top view illustrating a sixth structure of a display panel according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a method for detecting cracks in a display panel according to an embodiment of the present invention;
FIG. 8 is a first flowchart illustrating a crack detection method for a display panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In recent years, the quality of the display panel is more and more emphasized, when the display panel is manufactured, the display panel is cut by a manufacturing process, cracks can be generated on the display panel by cutting the display panel, and the display area cannot be displayed, so that the finished product of the display panel has a crack detection link, and a crack detection method for detecting voltage by using a voltmeter through an external comparator is complex and has high cost.
Referring to fig. 1 to 6, an embodiment of the invention provides a display panel 100, including a display area a and a non-display area B located at a periphery of the display area a; wherein the display panel 100 includes:
the detection wiring 200 is arranged in the non-display area B;
a plurality of scan lines 300 disposed in the display area a;
a first thin film transistor 400 disposed in the non-display region B, wherein the first thin film transistor 400 includes a first gate 410, a first source 420 and a first drain 430, the first source 420 is electrically connected to a detection scan line 310 of the plurality of scan lines 300, the first gate 410 is electrically connected to a first electrical signal source 500, and the first electrical signal source 500 is configured to provide a voltage for driving the first gate 410 to operate;
a first terminal 610 electrically connected to the first drain electrode 430;
when the display panel 100 is used for crack detection, the first terminal 610 is electrically connected to the detection trace 200; when the display panel 100 is used for displaying, the first terminal 610 is insulated from the detection trace 200.
According to the embodiment of the invention, the first thin film transistor connected with the detection scanning line and the first terminal is arranged, so that the pixels and the detection wires in the display area can be conducted with the detection wires through the first thin film transistor, the brightness change of the corresponding pixels is detected, the crack detection is carried out on the display panel, the crack detection process is simplified, and the cost is saved.
The technical solution of the present invention will now be described with reference to specific embodiments.
In this embodiment, if the first terminal 610 is welded to the detection scan line 310, when the display panel 100 is used for normal display, there may be voltage fluctuation, and since the detection scan line 310 is also one scan line 300 of the display area a of the display panel 100, voltage movement may affect a change of a pixel corresponding to the detection scan line 310, and affect normal display, by providing the first thin film transistor 400, a high voltage signal or a low voltage signal is provided to the first gate 410 by using the first electric signal source 500, so as to implement conduction or disconnection between the first source 420 and the first drain 430, implement conduction or disconnection between the first terminal 610 and the detection scan line 310, and ensure that normal display in the display area a of the display panel 100 is not affected, please refer to fig. 1 and fig. 2.
In this embodiment, referring to fig. 1, in order to avoid that the normal display in the display area a of the display panel 100 is not affected, the display panel 100 further includes a first conductive line 710 connecting the first terminal 610 and the first drain 430, and the first conductive line 710 and the detection scan line 310 are disposed in different layers. When the display area a displays normally, the first conducting wire 710 and the detection scanning line 310 arranged in different layers can reduce the risk of misconduction between the first conducting wire 710 and the detection scanning line 310, and ensure that normal display in the display area a of the display panel 100 is not affected.
In this embodiment, referring to fig. 1, the display panel 100 further includes a second conductive line 720 connecting the first thin film transistor 400 and the detection scan line 310.
In this embodiment, when the display panel 100 is used for crack detection, an external electrical signal is required, a point location is required to be connected, the display panel 100 further includes a second terminal 620 and a third terminal 630 electrically connected to two ends of the detection trace 200, the first terminal 610 and the second terminal 620 are arranged in an insulating manner and located at the first end portion 110 of the display panel 100, and the third terminal 630 is located at the second end portion 120 of the display panel 100 opposite to the first end portion 110. The second terminal 620 and the third terminal 630 are disposed at two opposite sides, and the detection trace 200 is disposed around the edge of the display panel 100, so as to facilitate the corresponding connection of the first terminal 610, the second terminal 620 and the third terminal 630, please refer to fig. 1.
In this embodiment, the display panel 100 further includes a fourth terminal 640 located at the second end portion 120, and the fourth terminal 640 is insulated from the third terminal 630; a first end of the detection scan line 310 is electrically connected to the first terminal 610, and a second end of the detection scan line 310 is electrically connected to the fourth terminal 640. The fourth terminal 640 can perform bilateral detection, facilitate pin connection during detection, and prevent the fixture from being mismatched and unable to be detected, please refer to fig. 3.
In this embodiment, the fourth terminal 640 may be electrically connected to the detection scan line 310 through a third thin film transistor 650, and the structure of the third thin film transistor 650 may refer to the structure of the first thin film transistor 400, which is not described herein again, and refer to fig. 3.
In this embodiment, when the display panel 100 is used for crack detection, in order to avoid the influence of excessively complicated or lengthy circuits on the detection effect, the display panel 100 includes a plurality of scan lines 300, and the detection scan line 310 is the first scan line 300 close to the first terminal 610. The crack detection of the display panel 100 can be realized only by performing the correlation detection on the scanning lines 300 in the bottom row and detecting whether the pixels in the bottom row of the display panel 100 are lighted, so that the time and labor are saved, the complicated circuit design of the display panel 100 is avoided, and please refer to fig. 1.
In this embodiment, when the display panel 100 is used for crack detection, which part has a crack cannot be determined at present, so that a crack generation area needs to be determined, the display panel 100 further includes at least one segment unit 800 located on the detection trace 200, the segment unit 800 disconnects the detection trace, the segment unit 800 includes two segment terminals 810, when the display panel 100 is used for crack detection, the two corresponding segment terminals 810 are electrically connected, and when the display panel 100 is used for display, the two corresponding segment terminals 810 are arranged in an insulating manner, please refer to fig. 4.
The detection trace 200 is segmented, when a pixel corresponding to the scanning detection trace 200 is not lit, two corresponding segmented terminals 810 can be disconnected, an electric signal is separately provided for the segmented terminals 810 close to one side of the first terminal 610, if the pixel corresponding to the scanning detection trace 200 is lit, it indicates that the line corresponding to the segmented terminal 810 far away from one side of the first terminal 610 is damaged, and if the pixel corresponding to the scanning detection trace 200 is not lit, it indicates that the line corresponding to the segmented terminal 810 close to one side of the first terminal 610 is damaged. Can be repaired or replaced independently, so as to reduce the time cost, please refer to fig. 4.
In this embodiment, the segmentation unit 800 may be located near a top corner region of the display panel 100, which is beneficial to reduce the standing position of the display area a and is beneficial to detect the specific position of crack generation, please refer to fig. 5.
In this embodiment, when the display panel 100 is used for crack detection, two corresponding segment terminals 810 may be connected by pins or probes of a jig, and for specific operations, reference may be made to the description in the crack detection method of the display panel 100, which is not described herein again.
In this embodiment, the display panel 100 further includes a second thin film transistor 820 connected to two corresponding segment terminals 810, the second thin film transistor 820 includes a second gate, a second source and a second drain, the second source is electrically connected to one segment terminal 810, the second drain is electrically connected to the other corresponding segment terminal 810, the second gate is electrically connected to a second electrical signal source, and the second electrical signal source is configured to provide a voltage for driving the second gate to operate, please refer to fig. 6. The second thin film transistor 820 is used for switching, so that the cost of a jig for an external circuit can be reduced, and the detection efficiency is improved.
In this embodiment, the non-display area B includes a bonding area located at one end of the display panel 100, the first terminal 610 is located in the bonding area, and the detection trace 200 is located outside the bonding area and at the periphery of the display panel 100.
In this embodiment, when the crack detection is performed on the display panel 100, the gate on array (goa) is turned off, that is, the gate signal is turned off, the data signal is periodically turned on, and the source signal of the pixel normally operates.
In this embodiment, the first electrical signal source 500 or/and the second electrical signal source is connected to an enable signal line. The enabling signal line is synchronous with the time sequence, so that the detection scanning line 310 can be started during crack detection without influencing the display effect, the normal operation of crack detection is ensured, the normal display of the display panel 100 is not influenced, and a signal source is not required to be newly introduced.
According to the embodiment of the invention, the first thin film transistor connected with the detection scanning line and the first terminal is arranged, so that the pixels and the detection wires in the display area can be conducted with the detection wires through the first thin film transistor, the brightness change of the corresponding pixels is detected, the crack detection is carried out on the display panel, the crack detection process is simplified, and the cost is saved.
Referring to fig. 7, an embodiment of the invention further provides a crack detection method for a display panel 100, including:
s100, providing a display panel 100, wherein the display panel 100 comprises a display area A and a non-display area B positioned at the periphery of the display area A; the display panel 100 includes: the detection wiring 200 is arranged in the non-display area B; a plurality of scan lines 300 disposed in the display area a; a first thin film transistor 400 disposed in the non-display region B, wherein the first thin film transistor 400 includes a first gate 410, a first source 420 and a first drain 430, the first source 420 is electrically connected to a detection scan line 310 of the plurality of scan lines 300, the first gate 410 is electrically connected to a first electrical signal source 500, and the first electrical signal source 500 is configured to provide a voltage for driving the first gate 410 to operate; a first terminal 610 electrically connected to the first drain electrode 430;
s200, electrically connecting the first terminal 610 with the detection trace 200;
s300, inputting a voltage signal to the first gate 410 to electrically conduct the first source 420 and the first drain 430 by using the first electrical signal source 500, so that the detection scan line 310 is electrically conducted with the first terminal 610;
s400, inputting a detection signal at an end of the detection trace 200 away from the first terminal 610 to obtain a first brightness of a sub-pixel in the display panel 100 corresponding to the detection scan line 310;
when the first luminance is greater than zero, the display panel 100 is a normal display panel, and when the first luminance is equal to zero, the display panel 100 is an abnormal display panel.
According to the embodiment of the invention, the first thin film transistor connected with the detection scanning line and the first terminal is arranged, so that the pixels and the detection wires in the display area can be conducted with the detection wires through the first thin film transistor, the brightness change of the corresponding pixels is detected, the crack detection is carried out on the display panel, the crack detection process is simplified, and the cost is saved.
The technical solution of the present invention will now be described with reference to specific embodiments.
The crack detection method of the display panel 100 includes:
s100, a display panel 100 is provided.
In this embodiment, the display panel 100 includes a display area a and a non-display area B located at the periphery of the display area a; the display panel 100 includes: the detection wiring 200 is arranged in the non-display area B; a plurality of scan lines 300 disposed in the display area a; a first thin film transistor 400 disposed in the non-display region B, wherein the first thin film transistor 400 includes a first gate 410, a first source 420 and a first drain 430, the first source 420 is electrically connected to a detection scan line 310 of the plurality of scan lines 300, the first gate 410 is electrically connected to a first electrical signal source 500, and the first electrical signal source 500 is configured to provide a voltage for driving the first gate 410 to operate; a first terminal 610 electrically connected to the first drain 430, as shown in fig. 1 and 2.
In this embodiment, if the first terminal 610 is welded to the detection scan line 310, when the display panel 100 is used for normal display, there may be voltage fluctuation, and since the detection scan line 310 is also one scan line 300 of the display area a of the display panel 100, voltage movement may affect a change of a pixel corresponding to the detection scan line 310, and affect normal display, by providing the first thin film transistor 400, a high voltage signal or a low voltage signal is provided to the first gate 410 by using the first electric signal source 500, so as to implement conduction or disconnection between the first source 420 and the first drain 430, and implement conduction or disconnection between the first terminal 610 and the detection scan line 310, and ensure that normal display in the display area a of the display panel 100 is not affected, please refer to fig. 1.
In this embodiment, the non-display area B includes a bonding area located at one end of the display panel 100, the first terminal 610 is located in the bonding area, and the detection trace 200 is located outside the bonding area and at the periphery of the display panel 100.
In this embodiment, when the crack detection is performed on the display panel 100, the gate on array (goa) is turned off, that is, the gate signal is turned off, the data signal is periodically turned on, and the source signal of the pixel normally operates.
S200, electrically connecting the first terminal 610 with the detection trace 200.
In this embodiment, the display panel 100 further includes a second terminal 620 and a third terminal 630 electrically connected to two ends of the detection trace 200, the first terminal 610 and the second terminal 620 are disposed in an insulated manner and located at the first end portion 110 of the display panel 100, and the third terminal 630 is located at the second end portion 120 of the display panel 100 opposite to the first end portion 110.
In this embodiment, step S200 includes:
s210, providing a detection fixture 900 including a first probe 910 and a second probe 920, wherein the first probe 910 and the second probe 920 are connected to each other, please refer to fig. 8.
S220, electrically connecting the first probe 910 with the first terminal 610, and electrically connecting the second probe 920 with the second terminal 620, please refer to fig. 8.
S300, inputting a voltage signal to the first gate 410 to electrically conduct the first source 420 and the first drain 430 by using the first electric signal source 500, so as to electrically conduct the detection scan line 310 and the first terminal 610, please refer to fig. 8.
In this embodiment, the first electrical signal source 500 or/and the second electrical signal source is connected to an enable signal line. The enabling signal line is synchronous with the time sequence, so that the detection scanning line 310 can be started during crack detection without influencing the display effect, the normal operation of crack detection is ensured, the normal display of the display panel 100 is not influenced, and a signal source is not required to be newly introduced.
S400, inputting a detection signal at an end of the detection trace 200 away from the first terminal 610 to obtain a first brightness of a sub-pixel in the display panel 100 corresponding to the detection scan line 310.
In this embodiment, when the first luminance is greater than zero, the display panel 100 is a normal display panel, and when the first luminance is equal to zero, the display panel 100 is an abnormal display panel.
In this embodiment, please refer to any of the above specific structures of the display panel 100 for other specific structures of the display panel 100, which are not described herein again.
According to the embodiment of the invention, the first thin film transistor connected with the detection scanning line and the first terminal is arranged, so that the pixels and the detection wires in the display area can be conducted with the detection wires through the first thin film transistor, the brightness change of the corresponding pixels is detected, the crack detection is carried out on the display panel, the crack detection process is simplified, and the cost is saved.
Referring to fig. 9, an embodiment of the present invention further provides a mobile terminal 10, including any one of the display panels 100 and the terminal body 20, where the terminal body 20 and the display panel 100 are combined into a whole.
Please refer to any one of the embodiments of the display panel 100 and fig. 1 to 6, which will not be described herein.
In this embodiment, the terminal main body 20 may include a middle frame, a frame adhesive, and the like, and the mobile terminal 10 may be a mobile display terminal such as a display device, a mobile phone, a tablet, and the like, which is not limited herein.
The embodiment of the invention discloses a display panel, a crack detection method thereof and a mobile terminal; the display panel comprises a detection wiring, a plurality of scanning lines, a first thin film transistor and a first terminal, wherein the first thin film transistor and the first terminal are arranged in the non-display area; according to the embodiment of the invention, the first thin film transistor connected with the detection scanning line and the first terminal is arranged, so that the pixels and the detection wires in the display area can be conducted with the detection wires through the first thin film transistor, the brightness change of the corresponding pixels is detected, the crack detection is carried out on the display panel, the crack detection process is simplified, and the cost is saved.
The display panel, the crack detection method thereof, and the mobile terminal provided by the embodiment of the present invention are described in detail above, and a specific example is applied in the description to explain the principle and the embodiment of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A display panel is characterized by comprising a display area and a non-display area positioned at the periphery of the display area; wherein the display panel includes:
the detection wiring is arranged in the non-display area;
a plurality of scanning lines arranged in the display area;
the first thin film transistor is arranged in the non-display area and comprises a first grid electrode, a first source electrode and a first drain electrode, the first source electrode is electrically connected with a detection scanning line in the scanning lines, the first grid electrode is electrically connected with a first electric signal source, and the first electric signal source is used for providing voltage for driving the first grid electrode to be in a working state;
a first terminal electrically connected to the first drain electrode;
when the display panel is used for crack detection, the first terminal is electrically connected with the detection wiring; when the display panel is used for displaying, the first terminal and the detection wiring are arranged in an insulating mode.
2. The display panel according to claim 1, wherein the display panel further comprises a first wire connecting the first terminal and the first drain electrode, and the first wire is disposed in a different layer from the detection scan line.
3. The display panel of claim 1, wherein the display panel further comprises a second terminal and a third terminal electrically connected to two ends of the detection trace, the first terminal and the second terminal are disposed in an insulated manner and located at a first end of the display panel, and the third terminal is located at a second end of the display panel opposite to the first end.
4. The display panel according to claim 3, wherein the display panel further comprises a fourth terminal at the second end portion, the fourth terminal being provided insulated from the third terminal;
the first end of the detection scanning line is electrically connected with the first terminal, and the second end of the detection scanning line is electrically connected with the fourth terminal.
5. The display panel according to claim 1, wherein the detection scan line is a first scan line close to the first terminal.
6. The display panel according to claim 1, wherein the display panel further comprises at least one segment unit located on the detection trace, the segment unit disconnects the detection trace, the segment unit comprises two segment terminals, when the display panel is used for crack detection, the two corresponding segment terminals are electrically connected, and when the display panel is used for display, the two corresponding segment terminals are arranged in an insulating manner.
7. The display panel according to claim 6, wherein the display panel further comprises a second thin film transistor connected to two corresponding segment terminals, the second thin film transistor comprises a second gate, a second source and a second drain, the second source is electrically connected to one of the segment terminals, the second drain is electrically connected to the other corresponding segment terminal, the second gate is electrically connected to a second electrical signal source, and the second electrical signal source is configured to provide a voltage for driving the second gate to operate.
8. A crack detection method of a display panel is characterized by comprising the following steps:
providing a display panel, wherein the display panel comprises a display area and a non-display area positioned at the periphery of the display area; the display panel includes: the detection wiring is arranged in the non-display area; a plurality of scanning lines arranged in the display area; the first thin film transistor is arranged in the non-display area and comprises a first grid electrode, a first source electrode and a first drain electrode, the first source electrode is electrically connected with a detection scanning line in the scanning lines, the first grid electrode is electrically connected with a first electric signal source, and the first electric signal source is used for providing voltage for driving the first grid electrode to be in a working state; a first terminal electrically connected to the first drain electrode;
electrically connecting the first terminal with the detection trace;
inputting a voltage signal for electrically connecting the first source and the first drain to the first gate by using the first electric signal source, so that the detection scanning line is electrically connected to the first terminal;
inputting a detection signal at one end of the detection wiring far away from the first terminal to obtain first brightness of sub-pixels corresponding to the detection scanning lines in the display panel;
when the first brightness is larger than zero, the display panel is a normal display panel, and when the first brightness is equal to zero, the display panel is an abnormal display panel.
9. The method according to claim 8, wherein the display panel further comprises a second terminal and a third terminal electrically connected to two ends of the detection trace, the first terminal and the second terminal are insulated and located at a first end of the display panel, the third terminal is located at a second end of the display panel opposite to the first end, and the step of electrically connecting the first terminal and the detection trace comprises:
providing a detection jig comprising a first probe and a second probe, wherein the first probe and the second probe are connected with each other;
electrically connecting the first probe to the first terminal and electrically connecting the second probe to the second terminal.
10. A mobile terminal comprising the display panel according to any one of claims 1 to 7 and a terminal body, the terminal body being integrated with the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110822988.XA CN113487970A (en) | 2021-07-21 | 2021-07-21 | Display panel, crack detection method thereof and mobile terminal |
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