CN112687212B - Display panel, detection method thereof and display device - Google Patents
Display panel, detection method thereof and display device Download PDFInfo
- Publication number
- CN112687212B CN112687212B CN202011547855.8A CN202011547855A CN112687212B CN 112687212 B CN112687212 B CN 112687212B CN 202011547855 A CN202011547855 A CN 202011547855A CN 112687212 B CN112687212 B CN 112687212B
- Authority
- CN
- China
- Prior art keywords
- crack detection
- detection line
- sub
- line
- crack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 436
- 238000005452 bending Methods 0.000 claims abstract description 145
- 238000004891 communication Methods 0.000 claims description 52
- 238000012360 testing method Methods 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention provides a display panel, a detection method thereof and a display device, which can not only carry out large-range crack detection on the outer side of a second area of the display panel through an arranged crack detection line, but also carry out small-range crack detection on an inner bending angle of the display panel through an inner bending crack detection line, thereby expanding the crack detection range and ensuring the comprehensive detection of peripheral cracks of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a detection method thereof and a display device.
Background
Display devices are widely used in the fields of mobile phones, wearable devices, electronic readers, and the like, and the mainstream Display devices generally include Liquid Crystal Display (LCD) devices and Organic Light Emitting Display (OLED) devices. In the manufacturing process of the display panel of the display device, a plurality of processes are generally performed on a substrate, and then a single display panel is obtained through processes such as cutting or peeling. In the process of manufacturing, cutting or peeling the substrate base plate, the screen body crack is easy to generate in the peripheral area of the display panel, so the crack detection structure is required to be arranged in the peripheral area of the display panel to detect the crack, but the detection range of the conventional crack detection structure is small.
Disclosure of Invention
In view of this, the invention provides a display panel, a detection method thereof and a display device, which effectively solve the technical problems in the prior art, expand the crack detection range and ensure the comprehensive detection of cracks around the display panel.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a display panel, comprising:
the bending structure comprises a first area and a second area positioned on the periphery of the first area, wherein the second area comprises a surrounding sub-area surrounding the first area and a bending sub-area positioned on one side of the surrounding sub-area, and an inward bending angle is formed between the surrounding sub-area and the bending sub-area;
the crack detection line is positioned in the second area and arranged along the outer edge line of the second area, and the crack detection line is electrically connected with the crack test circuit;
the inner bending crack detection line is positioned between the crack detection line and the outer edge line of the second area, the inner bending crack detection line comprises a first sub inner bending crack detection line, a second sub inner bending crack detection line and an inner bending communication line, the first sub inner bending crack detection line and the second sub inner bending crack detection line extend along the outer edge line at the inner bending angle and extend from the surrounding subarea to the bending subarea, the inner bending communication line is connected between the first sub inner bending crack detection line and the second sub inner bending crack detection line, all current loops formed by the first sub inner bending crack detection line and the second sub inner bending crack detection line when the inner bending communication line is conducted are connected with the crack detection line in series, and at least one current loop flows through the bending subarea.
Correspondingly, the invention also provides a detection method of the display panel, the detection method is applied to the display panel, and the detection method comprises the following steps:
and the crack test circuit outputs a detection signal to the crack detection line, and controls the incurve communication line to communicate the first sub-incurve crack detection line with the second sub-incurve crack detection line.
Correspondingly, the invention further provides a display device which comprises the display panel.
Compared with the prior art, the technical scheme provided by the invention at least has the following advantages:
the invention provides a display panel, a detection method thereof and a display device, comprising the following steps: the bending device comprises a first area and a second area located on the periphery of the first area, wherein the second area comprises a surrounding sub-area surrounding the first area and a bending sub-area located on one side of the surrounding sub-area, and an inward bending angle is formed between the surrounding sub-area and the bending sub-area; the crack detection line is positioned in the second area and arranged along the outer edge line of the second area, and the crack detection line is electrically connected with the crack test circuit; the inner bending crack detection line is positioned between the crack detection line and the outer edge line of the second area, the inner bending crack detection line comprises a first sub inner bending crack detection line, a second sub inner bending crack detection line and an inner bending communication line, the first sub inner bending crack detection line and the second sub inner bending crack detection line extend along the outer edge line at the inner bending angle and extend from the surrounding subarea to the bending subarea, the inner bending communication line is connected between the first sub inner bending crack detection line and the second sub inner bending crack detection line, all current loops formed by the first sub inner bending crack detection line and the second sub inner bending crack detection line when the inner bending communication line is conducted are connected with the crack detection line in series, and at least one current loop flows through the bending subarea.
According to the technical scheme provided by the invention, the outer side line of the second area of the display panel can be subjected to large-range crack detection through the arranged crack detection line, and the inner bending angle of the display panel can be subjected to small-range crack detection through the inner bending crack detection line, so that the crack detection range is expanded, and the comprehensive detection of the cracks around the display panel is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6a is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6b is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a crack test circuit according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device 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.
As described in the background, in the manufacturing process of the display panel of the display device, a plurality of processes are generally performed on a substrate, and then a single display panel is obtained by cutting or peeling. In the process of manufacturing, cutting or peeling the substrate base plate, the screen body crack is easy to generate in the peripheral area of the display panel, so the crack detection structure is required to be arranged in the peripheral area of the display panel to detect the crack, but the detection range of the conventional crack detection structure is small.
Based on this, the embodiment of the invention provides a display panel, a detection method thereof and a display device, which effectively solve the technical problems in the prior art, expand the crack detection range and ensure the comprehensive detection of cracks around the display panel.
To achieve the above object, the technical solutions provided by the embodiments of the present invention are described in detail below, specifically with reference to fig. 1 to 11.
Referring to fig. 1, a schematic structural diagram of a display panel according to an embodiment of the present invention is shown, where the display panel includes:
the structure comprises a first area 10 and a second area 20 located on the periphery of the first area 10, wherein the second area 20 comprises a surrounding sub-area 21 surrounding the first area 10 and a bending sub-area 22 located on one side of the surrounding sub-area 21, and an inward bending angle 23 is formed between the surrounding sub-area 21 and the bending sub-area 22.
And the crack detection line 100 is positioned in the second area 20 and arranged along the outer edge line of the second area 20, and the crack detection line 100 is electrically connected with a crack test circuit 200.
An incurved crack detection line between the crack detection line 100 and the outer edge line of the second region 20, the incurved crack detection line includes a first sub-incurved crack detection line 310, a second sub-incurved crack detection line 320 and an incurved communication line 330, the first sub-incurve crack detection line 310 and the second sub-incurve crack detection line 320 extend along the outer edge line at the incurve angle 23 and extend from the hoop sub-region 21 to the bending sub-region 22, the incurve communication line 330 is connected between the first sub-incurve crack detection line 310 and the second sub-incurve crack detection line 320, all the current loops formed by the inflected communication line 330 and the first and second sub-inflected crack detecting lines 310 and 320 when they are conducted are connected in series with the crack detecting line 100, and at least one of the current loops flows through the bending sub-region 22.
It should be noted that, the second region provided in the embodiment of the present invention includes an encircling sub-region and a bending sub-region, and in a plane where the first region is located, and in a direction perpendicular to the encircling sub-region to the bending sub-region, a width between two side lines of the bending sub-region is smaller than a width between two side lines of the encircling sub-region, so that an inward bending angle is formed between the encircling sub-region and the bending sub-region, which is the same as that in the prior art, and therefore, redundant description is not given in the present invention. And the inner bend crack detection circuit provided by the embodiment of the invention is positioned between the crack detection line and the outer edge line of the second area close to the crack detection line, so that the inner bend crack detection circuit is close to the outer edge line of the second area at the inner bend angle, and the crack condition at the inner bend angle can be successfully detected.
It can be understood that, according to the technical scheme provided by the embodiment of the invention, not only can the outer side line of the second area of the display panel be subjected to large-scale crack detection through the arranged crack detection line, but also the inner bending angle of the display panel can be subjected to small-scale crack detection through the inner bending crack detection line, so that the crack detection range is expanded, and the comprehensive detection of the peripheral cracks of the display panel is ensured.
As shown in fig. 2, another structure of a display panel according to an embodiment of the present invention is schematically illustrated, wherein current loops formed by the first sub-inflected crack detection line 310 and the second sub-inflected crack detection line 320 when the inflected communication line 330 is conducted are connected in series with the crack detection line 100, and the current loops flow through the bending sub-region 22. The inflected communication line 330 provided by the embodiment of the present invention may include a short-circuit trace, and the short-circuit trace is connected between the first sub-inflected crack detection line 310 and the second sub-inflected crack detection line 320.
It can be understood that the short circuit trace provided by the embodiment of the present invention is connected to the first sub inward bending crack detection line and the second sub inward bending crack detection line, and a current loop formed by the first sub inward bending crack detection line, the second sub inward bending crack detection line and the short circuit trace flows through the bending sub-region, so that the connection end of the short circuit trace provided by the embodiment of the present invention, the first sub inward bending crack detection line and the second sub inward bending crack detection line is located in the bending sub-region. Preferably, the short-circuit trace provided by the embodiment of the present invention is located in the bending sub-region, and the short-circuit trace is electrically connected to the first sub-inflexion crack detection line and the second sub-inflexion crack detection line at the end of the bending sub-region.
The inner bend communication line provided by the embodiment of the invention can also be in other line structures to realize the communication between the first sub inner bend detection line and the second sub inner bend detection line, and the invention is not particularly limited. As shown in fig. 3, a schematic structural diagram of another display panel provided for an embodiment of the present invention is provided, wherein the inflected communication line 330 provided in the embodiment of the present invention includes at least one switching tube M, a control end of the switching tube M is connected to a control signal S, a first end of the switching tube M is electrically connected to the first sub-inflected crack detection line 310, and a second end of the switching tube M is electrically connected to the second sub-inflected crack detection line 320, wherein a connection end of the at least one switching tube M to the first sub-inflected crack detection line 310 and a connection end of the second sub-inflected crack detection line 320 are located in the bending sub-region 22.
It can be understood that when the inflexion communication line provided by the embodiment of the present invention includes a switching tube, the current loop structure among the first sub-inflexion detection line, the second sub-inflexion detection line, and the inflexion communication line is implemented by controlling the conduction of the switching tube electrically connected with the first sub-inflexion detection line and the second sub-inflexion detection line. In addition, the connecting end of the at least one switching tube and the first sub-inner bending crack detection line and the connecting end of the second sub-inner bending crack detection line are located in the bending sub-region, so that at least one current loop formed by the inner bending communication line and the first sub-inner bending crack detection line and the second sub-inner bending crack detection line can pass through the bending sub-region.
When the incurved connection line provided by the embodiment of the invention comprises a plurality of switching tubes, all the switching tubes can be sequentially controlled to be conducted, and only one switching tube is conducted at the same time, or all the switching tubes can be simultaneously controlled to be conducted, so that crack detection of different sections of the crack detection line, the first sub-incurved crack detection line and the second sub-incurved crack detection line is carried out.
And, the switching tube provided by the embodiment of the invention may be prepared in a region between the first sub-incurve crack detection line and the second sub-incurve crack detection line, or the switching tube may be prepared in a region outside a surrounding region of the first sub-incurve crack detection line and the second sub-incurve crack detection line. Secondly, the control signal for switching on the switching tube provided by the embodiment of the invention can be provided by a crack test circuit, or the control signal for switching on the switching tube can be provided by a control circuit independent from the crack test circuit. In addition, the conduction types of all the switch tubes provided by the embodiment of the invention can be the same, namely all the switch tubes are N-type switch tubes, or all the switch tubes are P-type switch tubes; or, all the switching tubes provided by the embodiment of the present invention include a P-type switching tube and an N-type switching tube.
Referring to fig. 4, a schematic structural diagram of another display panel provided in the embodiment of the present invention is shown, wherein the inflected communication line 330 provided in the embodiment of the present invention may include a plurality of switching tubes, which are a first switching tube M1, a second switching tube M2, and a third switching tube M3.
The connection end of the first switching tube M1 and the first sub incurve crack detection line 310 and the connection end of the second end of the first switching tube M1 and the second sub incurve crack detection line 310 are located at the encircled sub-area 21.
The connection end of the first end of the second switch tube M2 and the first sub-inflection crack detection line 310 and the connection end of the second switch tube M2 and the second sub-inflection crack detection line 320 are located at the inflection sub-region 22 near the inflection angle 23.
The connection end of the first end of the third switch tube M3 and the first sub-incurve crack detection line 310 and the connection end of the second end of the third switch tube M3 and the second sub-incurve crack detection line 320 are located at the bending sub-region 22 away from the incurve corner 23.
Optionally, the control signals respectively accessed by the first switch tube M1, the second switch tube M2, and the third switch tube M3 provided in the embodiment of the present invention may be all provided by the crack test circuit 200, that is, the control ends of the first switch tube M1, the second switch tube M2, and the third switch tube M3 are all electrically connected to the crack test circuit 200.
It can be understood that the inflected communication line provided by the embodiment of the present invention may include a first switch tube, a second switch tube and a third switch tube, and since the connection ends of the second switch tube and the third switch tube with the first sub-inflected crack detection line and the connection ends of the second sub-inflected crack detection line are both located in the bending sub-region, the requirement that at least one current loop formed by the inflected communication line and the first sub-inflected crack detection line and the second sub-inflected crack detection line passes through the bending sub-region is further satisfied. Meanwhile, when the first switching tube, the second switching tube and the third switching tube provided in the embodiment of the present invention are sequentially turned on and only one switching tube is turned on at the same time, or the first switching tube, the second switching tube and the third switching tube are simultaneously turned on, so as to perform crack detection on different sections of the crack detection line, the first sub-inflexion crack detection line and the second sub-inflexion crack detection line.
Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention, wherein the crack detection line provided by the present invention may be a first crack detection line 110, and the first crack detection line 110 extends along an outer edge of the second region 20.
It can be understood that the first crack detection line provided by the embodiment of the invention has the same shape as the outer edge line of the second region, and an opening is arranged at the connection position of the first crack detection line and the incurved crack detection line, so that two ends of the opening are respectively connected with the first sub-incurved crack detection line and the second sub-incurved crack detection line. The first crack detection line provided by the embodiment of the invention is a crack detection line arranged based on a resistance detection principle. When the first crack detection line is adopted for crack detection, the crack test circuit outputs a power supply signal to the first crack detection line, and simultaneously controls the incurve communication line to communicate the first sub incurve crack detection line with the second sub incurve crack detection line; and then, when the resistance of the current series circuit consisting of the crack detection line and the incurved crack detection line is judged to be greater than the preset resistance, the current series circuit is determined to be broken, namely, the periphery of the display panel is provided with cracks.
As shown in fig. 6a, which is a schematic structural diagram of another display panel provided by the embodiment of the present invention, some display panels may include holes 11 in the first region 10, wherein the first crack detection line 110 provided by the embodiment of the present invention may include a section surrounding the holes 11, and the section surrounding the holes 11 included in the first crack detection line 110 may be a single detection line surrounding the holes 11, further extending the crack detection range of the display panel. Or, as shown in fig. 6b, when the first area 10 includes the hole 11, the first crack detection line 110 includes a section surrounding the hole 11, and the section surrounding the hole 11 and included in the first crack detection line 110 may be a dual-line detection line, that is, the first crack detection line 110 includes an outer detection line and an inner detection line, both the outer detection line and the inner detection line are disposed around the hole 11, and the inner detection line is located between the outer detection line and the hole 11.
As shown in fig. 7, which is a schematic structural diagram of another display panel provided in the embodiment of the present invention, the crack detection line provided in the embodiment of the present invention may be a second crack detection line 120; wherein the display panel includes: at least one first data line 10a and at least one second data line 10b located in the first region 10; and the crack test circuit 200 includes: a first control switch circuit 210 having an output terminal electrically connected to the first data line 10a, a second control switch circuit 220 having an output terminal electrically connected to the second data line 10b, and a fixed voltage test terminal Vr having an input terminal electrically connected to the first control switch circuit 210.
The second crack detecting line 120 includes two sub-crack detecting lines connected, the input terminal of the first control switch circuit 210 is electrically connected to one sub-crack detecting line 121, and the input terminal of the second control switch circuit 220 is electrically connected to the other sub-crack detecting line 122.
All the current loops formed by the inflected communication line 330 and the first and second sub-inflected crack detecting lines 310 and 320 when they are conducted are connected in series with any one of the sub-crack detecting lines (e.g., the sub-crack detecting line 121).
It can be understood that the second crack detection lines provided by the embodiment of the invention may include two, and the two second crack detection lines are symmetrically arranged along an axis in the direction from the annular sub-region to the inner bending sub-region. Wherein the second crack detection line comprises two sub-crack detection lines, the first ends of the two sub-crack detection lines being connected and the second ends of the two sub-crack detection lines being connected to the crack test circuit. An opening is formed at the joint of one of the sub-crack detection lines and the inner bending crack detection line, and then two ends of the opening are respectively connected with the first sub-inner bending crack detection line and the second sub-inner bending crack detection line.
The second crack detection line provided by the embodiment of the invention is a crack detection line arranged based on a display anomaly detection principle. When the second crack detection line is adopted for crack detection, a first control switch circuit of the crack detection circuit is conducted with a second control switch circuit, and a sub-crack detection line and a fixed voltage test end are both electrically connected with the input end of the first control switch circuit, so that the fixed voltage test end outputs a voltage signal to the sub-crack detection line connected with the fixed voltage test end, and meanwhile, the inflexion communication line is controlled to communicate the first sub-inflexion crack detection line with the second sub-inflexion crack detection line; judging that pixels connected with a first data line and pixels connected with a second data line display different pictures, determining that a current series circuit formed by a crack detection line and an incurved crack detection line has a fracture, wherein a voltage signal cannot be transmitted to an input end of a second control switch circuit through the current series circuit formed by the crack detection line and the incurved crack detection line, and the access voltage on the second data line is different from the access voltage on the first data line, so that the display pictures of the pixels connected with the first data line and the pixels connected with the second data line are different; and if the pixels connected with the first data line and the pixels connected with the second data line are judged to display the same picture, the current series line formed by the crack detection line and the incurved crack detection line is not broken, wherein a voltage signal can be transmitted to the input end of the second control switch circuit through the crack detection line and the incurved crack detection line, so that the access voltage on the second data line is the same as the access voltage on the first data line, and the display pictures of the pixels connected with the first data line and the pixels connected with the second data line are the same.
In an embodiment of the invention, the fixed voltage test terminal provided by the invention can be a test terminal outputting a high level voltage.
Referring to fig. 8, a schematic structural diagram of a crack testing circuit according to an embodiment of the present invention is provided, where the first control switch circuit includes at least one first control switch M11, the first control switch M11 is electrically connected to the first data lines 10a in a one-to-one correspondence, a first end of the first control switch M11 is electrically connected to the first data lines 10a, a second end of the first control switch M11 is electrically connected to corresponding sub-crack detection lines (e.g., the sub-crack detection line 121) and the fixed voltage testing terminal Vr, and a control end of the first control switch is connected to a first control signal S1.
The second control switch circuit includes at least one second control switch M12, the second control switch M12 is electrically connected to the second data line 10b in a one-to-one correspondence manner, a first end of the second control switch M12 is electrically connected to the second data line 10b, a second end of the second control switch M12 is electrically connected to a corresponding sub-crack detection line (e.g., the sub-crack detection line 122), and a control end of the second control switch M12 is connected to a second control signal S2.
As shown in fig. 8, since the first control switch circuit and the second control switch circuit provided in the embodiment of the present invention can be turned on and off simultaneously, the conduction types of the first control switch tube M11 and the second control switch tube M12 provided in the present invention may be the same, that is, the first control switch tube M11 and the second control switch tube M12 are both P-type switch tubes or both N-type switch tubes, and further the first control signal S1 and the second control signal S2 may be output from the same control end, so as to reduce the number of control ends.
It should be noted that, in other embodiments of the present invention, the conduction types of the first control switch tube and the second control switch tube may also be different, and the present invention is not limited in particular.
As can be understood, when the second crack detection line is used for crack detection, the first control switch tube and the second control switch tube of the crack detection circuit are both conducted, and a sub-crack detection line and the fixed voltage detection end are both electrically connected with the input end of the first control switch circuit, so that the fixed voltage detection end outputs a voltage signal to the sub-crack detection line connected with the fixed voltage detection end, and the inflexion communication line is controlled to communicate the first sub-inflexion crack detection line with the second sub-inflexion crack detection line; and then judging whether the pixel connected with the first data line and the pixel connected with the second data line display the same picture or not to determine whether the second crack detection line, the first sub-incurved crack detection line and the second sub-incurved crack detection line have cracks or not.
In an embodiment of the invention, the crack test circuit provided by the invention may be disposed on the display panel, or the crack test circuit may be disposed on a main board electrically connected to the display panel, which is not limited in particular. When the crack test circuit is arranged on the mainboard, the crack detection line can be electrically connected with the crack test circuit on the mainboard through the flexible circuit board communicated with the display panel and the mainboard.
Correspondingly, an embodiment of the present invention further provides a detection method for a display panel, where the detection method is applied to the display panel provided in any one of the above embodiments, and the detection method includes:
and the crack test circuit outputs a detection signal to the crack detection line, and controls the incurve communication line to communicate the first sub-incurve crack detection line with the second sub-incurve crack detection line.
Referring to fig. 5, when the crack detection line provided by the embodiment of the present invention is the first crack detection line 110, the detection method provided by the present invention includes:
the crack test circuit 200 outputs a power signal to the crack detection line 110, and controls the inflexion communication line 330 to communicate the first sub-inflexion crack detection line 310 with the second sub-inflexion crack detection line 320;
and when the resistance of the current series circuit consisting of the crack detection line 110 and the incurved crack detection line is judged to be greater than the preset resistance, determining that the current series circuit is broken.
It can be appreciated that the first crack detection line provided by the embodiments of the invention is a crack detection line arranged on the basis of the principle of resistance detection. When the first crack detection line is adopted for crack detection, the crack test circuit outputs a power supply signal to the first crack detection line, and simultaneously controls the incurve communication line to communicate the first sub incurve crack detection line with the second sub incurve crack detection line; then, when the resistance of a current series circuit consisting of the crack detection line and the incurved crack detection line is judged to be greater than a preset resistance, the current series circuit is determined to be broken; that is, if the current series line is broken, the resistance of the entire current series line is infinite, which is inevitably greater than the predetermined resistance; and when the current series circuit is not broken, the resistance on the whole current series circuit is a small resistance which can be measured and is smaller than the preset resistance, so that whether the series circuit is broken or not is judged by judging the resistance.
Further referring to fig. 9, when the crack detection line provided by the embodiment of the present invention is the first crack detection line 110, and the inflected communication line includes a plurality of switching tubes, and the switching tubes are the first switching tube M1, the second switching tube M2, and the third switching tube M3, the method for detecting a display panel includes:
the crack test circuit 200 outputs a power signal to the crack detection line 110, and simultaneously controls the first switching tube M1 to be turned on to communicate the first sub-incurved crack detection line 310 and the second sub-incurved crack detection line 320, and controls the second switching tube M2 and the third switching tube M3 to be turned off;
judging whether the resistance of a current series circuit consisting of the crack detection line 110 and the incurved crack detection line is greater than a preset resistance, if so, determining that the current series circuit is broken; if not, carrying out the next step;
controlling the second switching tube M2 to be turned on to communicate the first sub-inflection crack detection line 310 and the second sub-inflection crack detection line 320, and controlling both the first switching tube M1 and the third switching tube M3 to be turned off;
judging whether the resistance of a current series circuit consisting of the crack detection line 110 and the incurved crack detection line is greater than a preset resistance, if so, determining that the current series circuit is broken; if not, carrying out the next step;
controlling the third switching tube M3 to be turned on to communicate the first sub-inflection crack detection line 310 and the second sub-inflection crack detection line 320, and controlling both the first switching tube M1 and the second switching tube M2 to be turned off;
judging whether the resistance of a current series circuit consisting of the crack detection line 110 and the incurved crack detection line is greater than a preset resistance, if so, determining that the current series circuit is broken; if not, determining that the crack detection line 110, the first sub-incurve crack detection line 310 and the second sub-incurve crack detection line 320 have no fracture.
It can be understood that, when the crack detection line provided by the embodiment of the invention is the first crack detection line, and the inflected communication line includes the first switch tube, the second switch tube and the third switch tube, crack detection of different sections of the display panel can be realized by sequentially conducting the first switch tube, the second switch tube and the third switch tube and controlling the conduction of only one switch tube at the same time on the basis of a control timing sequence, so that the specific position of the crack can be conveniently determined.
Referring to fig. 7, when the crack detection line provided by the embodiment of the present invention is the second crack detection line 120, the detection method provided by the embodiment of the present invention includes:
the first control switch circuit 210 and the second control switch circuit 220 of the crack testing circuit 200 are turned on, the fixed voltage testing terminal Vr outputs a voltage signal to the crack detecting line 120, and the inflexion communication line 330 is controlled to communicate the first sub-inflexion crack detecting line 310 with the second sub-inflexion crack detecting line 320;
when it is judged that the pixels connected to the first data line 10a and the pixels connected to the second data line 10b display different images, it is determined that the current serial line composed of the crack detection line 120 and the inflected crack detection line is broken.
The second crack detection line provided by the embodiment of the invention is a crack detection line arranged based on a display anomaly detection principle. When the second crack detection line is adopted for crack detection, a first control switch circuit of the crack detection circuit is conducted with a second control switch circuit, and a sub-crack detection line and a fixed voltage test end are both electrically connected with the input end of the first control switch circuit, so that the fixed voltage test end outputs a voltage signal to the sub-crack detection line connected with the fixed voltage test end, and meanwhile, the inflexion communication line is controlled to communicate the first sub-inflexion crack detection line with the second sub-inflexion crack detection line; judging that pixels connected with a first data line and pixels connected with a second data line display different pictures, determining that a current series circuit formed by a crack detection line and an incurved crack detection line has a fracture, wherein a voltage signal cannot be transmitted to an input end of a second control switch circuit through the current series circuit formed by the crack detection line and the incurved crack detection line, and the access voltage on the second data line is different from the access voltage on the first data line, so that the display pictures of the pixels connected with the first data line and the pixels connected with the second data line are different; and if the pixels connected with the first data line and the pixels connected with the second data line are judged to display the same picture, the current series line formed by the crack detection line and the incurved crack detection line is not broken, wherein a voltage signal can be transmitted to the input end of the second control switch circuit through the crack detection line and the incurved crack detection line, so that the access voltage on the second data line is the same as the access voltage on the first data line, and the display pictures of the pixels connected with the first data line and the pixels connected with the second data line are the same.
Further referring to fig. 10, in order to provide a structural schematic diagram of another display panel according to an embodiment of the present invention, when the crack detection line provided by the embodiment of the present invention is the second crack detection line 120, and the inflected communication line includes a plurality of switching tubes, and the plurality of switching tubes are a first switching tube M1, a second switching tube M2, and a third switching tube M3, the detection method includes: the first control switch circuit 210 and the second control switch circuit 220 of the crack testing circuit 200 are turned on, the fixed voltage testing terminal Vr outputs a voltage signal to the crack detection line 120, and at the same time, the first switch tube M1 is controlled to be turned on to communicate the first sub-inflection crack detection line 310 and the second sub-inflection crack detection line 320, and the second switch tube M2 and the third switch tube M3 are controlled to be turned off;
judging whether the pixel connected with the first data line 10a and the pixel connected with the second data line 10b display the same picture, if not, determining that the current series line formed by the crack detection line 120 and the incurved crack detection line is broken; if yes, carrying out the next step;
controlling the second switching tube M2 to be turned on to communicate the first sub-inflection crack detection line 310 and the second sub-inflection crack detection line 320, and controlling both the first switching tube M1 and the third switching tube M3 to be turned off;
judging whether the pixel connected with the first data line 10a and the pixel connected with the second data line 10b display the same picture, if not, determining that the current series line formed by the crack detection line 120 and the incurved crack detection line is broken; if yes, carrying out the next step;
controlling the third switching tube M3 to be turned on to communicate the first sub-inflection crack detection line 310 and the second sub-inflection crack detection line 320, and controlling both the first switching tube M1 and the second switching tube M2 to be turned off;
judging whether the pixel connected with the first data line 10a and the pixel connected with the second data line 10b display the same picture, if not, determining that the current series line formed by the crack detection line 120 and the incurved crack detection line is broken; if so, it is determined that none of the crack detection line 120, the first sub-recurved crack detection line 310 and the second sub-recurved crack detection line 320 is broken.
It can be understood that, when the crack detection line provided by the embodiment of the invention is the second crack detection line, and the inflected communication line includes the first switch tube, the second switch tube and the third switch tube, crack detection of different sections of the display panel can be realized by sequentially conducting the first switch tube, the second switch tube and the third switch tube and controlling the conduction of only one switch tube at the same time on the basis of a control timing sequence, so that specific positions of cracks can be conveniently determined.
Correspondingly, the embodiment of the invention also provides a display device, and the display device comprises the display panel provided by any one of the embodiments.
As shown in fig. 11, a schematic structural diagram of a display device according to an embodiment of the present invention is provided, where the display device 1000 according to the embodiment of the present invention may be a mobile terminal.
It should be noted that the display device provided in the embodiment of the present invention may also be a notebook, a tablet, a computer, a wearable device, and the like, and the present invention is not limited in particular.
The embodiment of the invention provides a display panel, a detection method thereof and a display device, wherein the display panel comprises the following components: the bending device comprises a first area and a second area located on the periphery of the first area, wherein the second area comprises a surrounding sub-area surrounding the first area and a bending sub-area located on one side of the surrounding sub-area, and an inward bending angle is formed between the surrounding sub-area and the bending sub-area; crack detection lines located in the second region and arranged along outer edges of the second region, the crack detection lines being electrically connected with a crack test circuit; the inner bending crack detection line is positioned between the crack detection line and the outer edge line of the second area, the inner bending crack detection line comprises a first sub inner bending crack detection line, a second sub inner bending crack detection line and an inner bending communication line, the first sub inner bending crack detection line and the second sub inner bending crack detection line extend along the outer edge line at the inner bending angle and extend from the surrounding subarea to the bending subarea, the inner bending communication line is connected between the first sub inner bending crack detection line and the second sub inner bending crack detection line, all current loops formed by the first sub inner bending crack detection line and the second sub inner bending crack detection line when the inner bending communication line is conducted are connected with the crack detection line in series, and at least one current loop flows through the bending subarea.
As can be seen from the above, the technical solution provided in the embodiment of the present invention can not only perform a large-scale crack detection on the outer edge side of the second area of the display panel through the set crack detection line, but also perform a small-scale crack detection on the inner bending angle of the display panel through the inner bending crack detection line, so as to expand the crack detection range and ensure the overall detection of the cracks around the display panel.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A display panel, comprising:
the bending device comprises a first area and a second area located on the periphery of the first area, wherein the second area comprises a surrounding sub-area surrounding the first area and a bending sub-area located on one side of the surrounding sub-area, and an inward bending angle is formed between the surrounding sub-area and the bending sub-area;
the crack detection line is positioned in the second area and arranged along the outer edge line of the second area, and the crack detection line is electrically connected with the crack test circuit;
the inner bending crack detection line is positioned between the crack detection line and the outer edge line of the second area, the inner bending crack detection line comprises a first sub inner bending crack detection line, a second sub inner bending crack detection line and an inner bending communication line, the first sub inner bending crack detection line and the second sub inner bending crack detection line extend along the outer edge line at the inner bending angle and extend from the surrounding subarea to the bending subarea, the inner bending communication line is connected between the first sub inner bending crack detection line and the second sub inner bending crack detection line, all current loops formed by the first sub inner bending crack detection line and the second sub inner bending crack detection line when the inner bending communication line is conducted are connected with the crack detection line in series, and at least one current loop flows through the bending subarea.
2. The display panel of claim 1, wherein the inturned communication line comprises a shorting trace connected between the first and second sub-inturned crack detection lines;
and/or the inner bending communication line comprises at least one switching tube, a control end of the switching tube is connected with a control signal, a first end of the switching tube is electrically connected with the first sub inner bending crack detection line, a second end of the switching tube is electrically connected with the second sub inner bending crack detection line, and a connecting end of the at least one switching tube and the first sub inner bending crack detection line and a connecting end of the second sub inner bending crack detection line are located in the bending sub-region.
3. The display panel according to claim 2, wherein the inflected communication line includes a plurality of switching tubes, the plurality of switching tubes being a first switching tube, a second switching tube, and a third switching tube;
the first end of the first switch tube and the connecting end of the first sub-incurve crack detection line, and the second end of the first switch tube and the connecting end of the second sub-incurve crack detection line are located in the surrounding sub-region;
the first end of the second switch tube and the connecting end of the first sub-inner bending crack detection line, and the second end of the second switch tube and the connecting end of the second sub-inner bending crack detection line are positioned at the bending sub-area close to the inner bending angle;
the first end of the third switch tube and the connecting end of the first sub-inner bending crack detection line, and the second end of the third switch tube and the connecting end of the second sub-inner bending crack detection line are located at the bending sub-area and far away from the inner bending angle.
4. The display panel according to claim 1, wherein the crack detection line is a first crack detection line extending along an outer edge of the second area.
5. The display panel according to claim 1, wherein the crack detection line is a second crack detection line; wherein the display panel includes: at least one first data line and at least one second data line located in the first region; and the crack test circuit includes: the output end of the first control switch circuit is electrically connected with the first data line, the output end of the second control switch circuit is electrically connected with the second data line, and the fixed voltage test end is electrically connected with the input end of the first control switch circuit;
the second crack detection line comprises two connected sub-crack detection lines, the input end of the first control switch circuit is electrically connected with one sub-crack detection line, and the input end of the second control switch circuit is electrically connected with the other sub-crack detection line;
when the inner bending communication line is conducted, all current loops formed by the inner bending communication line and the first sub inner bending crack detection line and the second sub inner bending crack detection line are connected with any one of the sub crack detection lines in series.
6. The display panel according to claim 5, wherein the first control switch circuit comprises at least one first control switch tube, the first control switch tube is electrically connected to the first data line in a one-to-one correspondence, a first end of the first control switch tube is electrically connected to the first data line, a second end of the first control switch tube is electrically connected to the corresponding sub-crack detection line and the fixed voltage test end, and a control end of the first control switch tube is connected to a first control signal;
the second control switch circuit comprises at least one second control switch tube, the second control switch tube is electrically connected with the second data line in a one-to-one correspondence mode, the first end of the second control switch tube is electrically connected with the second data line, the second end of the second control switch tube is electrically connected with the corresponding sub-crack detection line, and the control end of the second control switch tube is connected with a second control signal.
7. A method for inspecting a display panel, the method being applied to the display panel according to any one of claims 1 to 6, the method comprising:
and the crack test circuit outputs a detection signal to the crack detection line, and controls the incurve communication line to communicate the first sub-incurve crack detection line with the second sub-incurve crack detection line.
8. The method of inspecting a display panel according to claim 7, wherein when the crack detection line is a first crack detection line, the first crack detection line extends along an outer edge line of the second region, the method of inspecting includes:
the crack test circuit outputs a power supply signal to the crack detection line, and controls the incurve communication line to communicate the first sub-incurve crack detection line with the second sub-incurve crack detection line;
and when the resistance of the current series circuit consisting of the crack detection line and the incurved crack detection line is judged to be greater than a preset resistance, determining that the current series circuit is broken.
9. The method of claim 7, wherein when the crack detection line is a first crack detection line, the first crack detection line extends along an outer edge line of the second region, the inflected communication line includes a plurality of switching tubes, and the plurality of switching tubes are a first switching tube, a second switching tube, and a third switching tube, the method comprises:
the crack testing circuit outputs a power supply signal to the crack detection line, controls the first switching tube to be conducted so as to enable the first sub-inward-bending crack detection line and the second sub-inward-bending crack detection line to be communicated, and controls the second switching tube and the third switching tube to be turned off;
judging whether the resistance of a current series circuit consisting of the crack detection line and the incurved crack detection line is greater than a preset resistance, if so, determining that the current series circuit is broken; if not, carrying out the next step;
controlling the second switching tube to be conducted so as to enable the first sub-incurve crack detection line and the second sub-incurve crack detection line to be communicated, and controlling the first switching tube and the third switching tube to be turned off;
judging whether the resistance of a current series circuit consisting of the crack detection line and the incurved crack detection line is greater than a preset resistance, if so, determining that the current series circuit is broken; if not, carrying out the next step;
controlling the third switching tube to be conducted so as to enable the first sub-incurve crack detection line and the second sub-incurve crack detection line to be communicated, and controlling the first switching tube and the second switching tube to be turned off;
judging whether the resistance of a current series circuit consisting of the crack detection line and the incurved crack detection line is greater than a preset resistance, if so, determining that the current series circuit is broken; and if not, determining that the crack detection line, the first sub-incurve crack detection line and the second sub-incurve crack detection line have no fracture.
10. The inspection method for a display panel according to claim 7, wherein when the crack detection line is a second crack detection line, the display panel includes: at least one first data line and at least one second data line located in the first region; and the crack test circuit includes: the output end of the first control switch circuit is electrically connected with the first data line, the output end of the second control switch circuit is electrically connected with the second data line, and the fixed voltage test end is electrically connected with the input end of the first control switch circuit;
the second crack detection line comprises two connected sub-crack detection lines, the input end of the first control switch circuit is electrically connected with one sub-crack detection line, and the input end of the second control switch circuit is electrically connected with the other sub-crack detection line;
when the inner bend communication line is conducted, all current loops formed by the inner bend communication line and the first sub inner bend crack detection line and the second sub inner bend crack detection line are connected with any one of the sub crack detection lines in series;
the detection method comprises the following steps:
the first control switch circuit and the second control switch circuit of the crack testing circuit are conducted, the fixed voltage testing end outputs a voltage signal to the crack detection line, and meanwhile the incurve communication line is controlled to communicate the first sub-incurve crack detection line and the second sub-incurve crack detection line;
and determining that the current series line formed by the crack detection line and the incurved crack detection line is broken when the pixels connected with the first data line and the pixels connected with the second data line are judged to be different in display picture.
11. The inspection method for a display panel according to claim 7, wherein when the crack detection line is a second crack detection line, the display panel includes: at least one first data line and at least one second data line located in the first region; and the crack test circuit includes: the output end of the first control switch circuit is electrically connected with the first data line, the output end of the second control switch circuit is electrically connected with the second data line, and the fixed voltage test end is electrically connected with the input end of the first control switch circuit;
the second crack detection line comprises two connected sub-crack detection lines, the input end of the first control switch circuit is electrically connected with one sub-crack detection line, and the input end of the second control switch circuit is electrically connected with the other sub-crack detection line;
when the incurved communicating line is conducted, all current loops formed by the incurved communicating line and the first sub incurved crack detection line and the second sub incurved crack detection line are connected with any one of the sub crack detection lines in series;
when the inward-bending communication line comprises a plurality of switching tubes, and the switching tubes are a first switching tube, a second switching tube and a third switching tube, the detection method comprises the following steps: the first control switch circuit and the second control switch circuit of the crack testing circuit are conducted, the fixed voltage testing end outputs a voltage signal to the crack detection line, the first switch tube is controlled to be conducted to enable the first sub-incurved crack detection line and the second sub-incurved crack detection line to be communicated, and the second switch tube and the third switch tube are controlled to be turned off;
judging whether the pixels connected with the first data line and the pixels connected with the second data line display the same picture or not, and if not, determining that the current series line formed by the crack detection line and the incurved crack detection line is broken; if yes, carrying out the next step;
controlling the second switching tube to be conducted so as to enable the first sub-incurve crack detection line and the second sub-incurve crack detection line to be communicated, and controlling the first switching tube and the third switching tube to be turned off;
judging whether the pixels connected with the first data line and the pixels connected with the second data line display the same picture or not, and if not, determining that the current series line formed by the crack detection line and the incurved crack detection line is broken; if yes, carrying out the next step;
controlling the third switching tube to be conducted so as to enable the first sub-incurve crack detection line and the second sub-incurve crack detection line to be communicated, and controlling the first switching tube and the second switching tube to be turned off;
judging whether the pixels connected with the first data line and the pixels connected with the second data line display the same picture or not, and if not, determining that the current series line formed by the crack detection line and the incurved crack detection line is broken; and if so, determining that the crack detection line, the first sub-incurve crack detection line and the second sub-incurve crack detection line have no fracture.
12. A display device characterized in that it comprises a display panel according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547855.8A CN112687212B (en) | 2020-12-24 | 2020-12-24 | Display panel, detection method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547855.8A CN112687212B (en) | 2020-12-24 | 2020-12-24 | Display panel, detection method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112687212A CN112687212A (en) | 2021-04-20 |
| CN112687212B true CN112687212B (en) | 2022-05-17 |
Family
ID=75451938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011547855.8A Active CN112687212B (en) | 2020-12-24 | 2020-12-24 | Display panel, detection method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112687212B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180064596A (en) * | 2016-12-05 | 2018-06-15 | 삼성디스플레이 주식회사 | Display device |
| CN109540979A (en) * | 2018-11-19 | 2019-03-29 | 维沃移动通信有限公司 | A kind of display module and crack detecting method |
| 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 |
| CN209560899U (en) * | 2018-11-19 | 2019-10-29 | 昆山国显光电有限公司 | Flexible display apparatus |
| CN111398355A (en) * | 2020-03-25 | 2020-07-10 | 武汉华星光电半导体显示技术有限公司 | Display panel detection circuit and display device |
| CN111696461A (en) * | 2020-06-30 | 2020-09-22 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111833786A (en) * | 2020-07-29 | 2020-10-27 | 云谷（固安）科技有限公司 | Display panel, crack detection method thereof and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102372208B1 (en) * | 2017-08-21 | 2022-03-08 | 삼성디스플레이 주식회사 | Display device |
-
2020
- 2020-12-24 CN CN202011547855.8A patent/CN112687212B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180064596A (en) * | 2016-12-05 | 2018-06-15 | 삼성디스플레이 주식회사 | Display device |
| CN109540979A (en) * | 2018-11-19 | 2019-03-29 | 维沃移动通信有限公司 | A kind of display module and crack detecting method |
| CN209560899U (en) * | 2018-11-19 | 2019-10-29 | 昆山国显光电有限公司 | Flexible display apparatus |
| 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 |
| CN111398355A (en) * | 2020-03-25 | 2020-07-10 | 武汉华星光电半导体显示技术有限公司 | Display panel detection circuit and display device |
| CN111696461A (en) * | 2020-06-30 | 2020-09-22 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111833786A (en) * | 2020-07-29 | 2020-10-27 | 云谷（固安）科技有限公司 | Display panel, crack detection method thereof and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112687212A (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10509510B2 (en) | Touch display panel having pressure detecting function, display device and driving method | |
| US10506718B2 (en) | Display panel, detection method thereof, flexible printed circuit and display device | |
| US20220122499A1 (en) | Display panel, detection method and display device | |
| US20180108314A1 (en) | Array substrate, method for detecting the same and display device | |
| CN103926767B (en) | Liquid crystal display and detection method thereof | |
| KR20170100661A (en) | Display panel having touch function and fault detection method | |
| US20230080422A1 (en) | Display panel with narrow lower border and electronic device | |
| CN204287637U (en) | Array substrate, display panel and display device | |
| US11361690B2 (en) | Display substrate and method for detecting the same, and display device | |
| CN101201469B (en) | Liquid crystal display board and repairing method thereof | |
| US20160042683A1 (en) | Display panel | |
| CN106293203A (en) | Touch electrode structure, its open circuit short circuit test method, touch screen and display device | |
| CN107219701A (en) | Array base palte and display device | |
| CN111211113B (en) | Display substrate, manufacturing method thereof, detection method thereof and display device | |
| CN112687212B (en) | Display panel, detection method thereof and display device | |
| CN100452130C (en) | Short-circuit detecting device and picture element unit and display panel using the device | |
| US12089479B2 (en) | Display device and method for manufacturing the same, and electronic apparatus | |
| CN107123655B (en) | A kind of array substrate and preparation method thereof, detection method and display device | |
| CN104966491A (en) | Organic light emitting display panel and manufacturing method therefor | |
| CN201740952U (en) | Pixel array substrate | |
| CN107369402A (en) | Display panel, detection method thereof and display device | |
| CN114879393B (en) | Display panel and terminal equipment | |
| US9135846B2 (en) | Method for detecting liquid crystal display panel and detecting system | |
| CN109031721A (en) | Liquid crystal panel motherboard and detection device and detection method, liquid crystal display panel preparation method | |
| CN106773372B (en) | Common electrode structure, liquid crystal display panel and manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |