CN113012613B - Display panel and crack detection method thereof, display device and computing equipment - Google Patents
Display panel and crack detection method thereof, display device and computing equipment Download PDFInfo
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Abstract
The embodiment of the invention provides a display panel, a crack detection method of the display panel, a display device and computing equipment. The display panel has a display area and a non-display area, and further includes: a crack detection line disposed in the non-display area, the crack detection line having a first end and a second end, the first end of the crack detection line for receiving a detection signal; an auxiliary detection line having a first end and a second end, the first end of the auxiliary detection line for receiving the detection signal; a crack detection unit connected to the second ends of the crack detection lines and the auxiliary detection line, for receiving a first test signal output from the second end of the crack detection line and a second test signal output from the second end of the auxiliary detection line; the crack detection unit processes the first test signal and the second test signal to generate a crack detection signal, and judges whether the display panel has cracks or not according to the waveform of the crack detection signal.
Description
Technical Field
The invention belongs to the technical field of display panels, and particularly relates to a display panel, a crack detection method of the display panel, a display device and computing equipment.
Background
With the continuous development of display technology, the display panel is applied more and more widely in various fields. At present, in a mainstream display panel, a plurality of patterns of a display substrate are formed on a mother board in a manufacturing process, and then the mother board is cut to finally obtain a discrete display substrate. Cracks may be generated at the edge of the display substrate in the cutting process, and as the service life of the display panel increases, the cracks may extend into the display panel, which may affect the service life of the display panel.
Therefore, crack detection is performed after the display substrate is cut and formed, and there are two common methods for detecting cracks of the display panel: the first method is to arrange a circle of crack detection lines on the edge of the display panel, then detect the resistance of the crack detection lines by using the resistance detection of the driving chip, and judge whether cracks exist or not by the resistance of the crack detection lines. The second design is to perform write control of data signals on the display panel, and detect cracks in the panel by screen detection.
However, the above two detection methods have the characteristic of low sensitivity, and especially for an organic light-Emitting Diode (OLED) flexible screen, both the false detection rate and the missing detection rate of the screen body micro-cracks are relatively large.
Disclosure of Invention
The embodiment of the invention provides a display panel, a crack detection method of the display panel, a display device and computing equipment, which can improve the sensitivity of a crack detection line and reduce the false detection rate and the missing detection rate of screen body microcracks.
In a first aspect, an embodiment of the present invention provides a display panel, which has a display area and a non-display area, and further includes:
a crack detection line disposed in the non-display area, the crack detection line having a first end and a second end, the first end of the crack detection line for receiving a detection signal;
an auxiliary detection line having a first end and a second end, the first end of the auxiliary detection line for receiving the detection signal;
a crack detection unit connected to the second end of the crack detecting line and the second end of the auxiliary detecting line, for receiving a first test signal output from the second end of the crack detecting line and a second test signal output from the second end of the auxiliary detecting line;
the crack detection unit processes the first test signal and the second test signal to generate a crack detection signal, and judges whether the display panel has cracks or not according to the waveform of the crack detection signal.
In a second aspect, an embodiment of the present invention provides a crack detection method for a display panel, for performing crack detection on the display panel of the first aspect, where the crack detection method includes:
inputting detection signals to a first end of the crack detection line and a first end of the auxiliary detection line through a signal processing unit;
receiving, by the crack detection unit, a first test signal output from the crack detection line from a second end of the crack detection line, and a second test signal output from the auxiliary test line from a second end of the auxiliary detection line;
processing, by the crack detection unit, the first test signal and the second test signal to generate a crack detection signal;
and judging whether the display panel has cracks or not according to the crack detection signal.
In a third aspect, embodiments of the present invention provide a display device, which includes the display panel according to the first aspect of the present invention.
In a fourth aspect, an embodiment of the present invention provides a computing device, where the device includes: a processor, and a memory storing computer program instructions; the processor reads and executes the computer program instructions to implement the crack detection method of the display panel according to the second aspect of the invention.
According to the display panel and the crack detection method, the display device and the computing equipment of the display panel, the crack detection line and the auxiliary detection line are arranged, the detection signals are respectively sent to the crack detection line and the auxiliary detection line, then the crack detection signals are generated by processing the signals received from the crack detection line and the auxiliary detection line, and whether cracks exist in the display panel is judged through the waveform of the crack detection signals, so that whether cracks exist in the display panel is judged through the waveform detection, the display panel has higher sensitivity, and the false detection rate and the missing detection rate of screen body microcracks are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the 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 an exclusive-or circuit of a display panel according to an embodiment of the present invention;
FIG. 3 is a diagram of an example of a crack detection signal for a display panel according to an embodiment of the present invention;
FIG. 4 is another exemplary graph of a crack detection signal for a display panel provided by an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a crack detection method for a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computing device according to an embodiment of the present invention.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
In order to solve the problem of the prior art, embodiments of the present invention provide a display panel, a crack detection method thereof, a display device, and a computing device. The following first describes a display panel provided in an embodiment of the present invention.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 1, a display panel 100 according to an embodiment of the present invention has a display area 101 and a non-display area 102 surrounding the display area 101. The display region 101 is used to provide structures such as pixels, a driving circuit, data signal lines, scanning signal lines, and the like. The non-display area is used for setting structures such as a scanning circuit, a test circuit, a display control circuit and the like.
As shown in fig. 1, in the embodiment of the present invention, the display panel 100 includes a crack detection line 103, an auxiliary detection line 104, and a crack detection unit 105.
The crack detection line 103 is disposed in the non-display area 102. The crack detection line is for example a metal line, which can carry a current and a detection signal. The crack detection line 103 has a first end 11 and a second end 12, the first end 11 of the crack detection line 103 being adapted to receive a detection signal.
In some embodiments of the invention, as shown in FIG. 1, the crack detection line 103 at least partially surrounds the display area 101. Illustratively, the crack detection lines 103 are disposed at an edge region of the display panel 100, for example, and at least partially surround the display area 101. Whether the non-display area 102 cracks or not can be detected through the crack detection line 103, and whether the display panel 100 cracks or not can be judged. Illustratively, in some embodiments of the present invention, in order to increase the crack detection rate and improve the crack detection effect, especially the detection of micro cracks, the crack detection lines 103 may be arranged as curved or zigzag tracks. The crack detection line 103 is a curved or zigzag routing, so that the equivalent length of the crack detection line and the contact area of the crack detection line and the panel are increased, and the crack detection of the panel is facilitated.
In some embodiments of the present invention, the non-display region 102 further includes a bending region, such as a portion of the display panel 100 that needs to be bent backward or a bending portion of the foldable display panel. Crack detection lines 103 are arranged in the bending zones. The crack detection line 103 may detect whether a crack occurs in the bending region, and then determine whether the bending region of the display panel 100 is damaged.
The auxiliary sensing line 104 is, for example, a metal line, and can transmit a current and a sensing signal. The auxiliary detection line 104 has a first end 21 and a second end 22, and the first end 21 of the auxiliary detection line 104 is used for receiving the detection signal.
The crack detection unit 105 is connected to the second end 12 of the crack detection line 103 and the second end 22 of the auxiliary detection line 104, and is configured to receive a first test signal output from the second end 12 of the crack detection line 103 and a second test signal output from the second end 22 of the auxiliary detection line 104. In other words, the detection signals are transmitted to the two signal receiving ends a and B of the crack detection unit 105 through the crack detection line 103 and the auxiliary detection line 104, respectively.
In the embodiment of the present invention, the crack detection unit 105 processes the first test signal and the second test signal to generate a crack detection signal, and determines whether the display panel 100 has a crack or not by a waveform of the crack detection signal. The crack detection unit 105 may generate a crack detection signal by performing various operations, such as an exclusive or operation, an and or operation, and the like, on the first test signal and the second test signal after receiving the first test signal and the second test signal, and then determine whether the display panel 100 has a crack by a waveform of the crack detection signal. For example, when the crack detection signal is the first preset waveform, it indicates that no crack has occurred in the display panel 100; when the crack detection signal is the second preset waveform, it indicates that the display panel 100 has cracks. The crack determination method of the display panel 100 will be further described later and will not be described in detail herein.
As shown in fig. 1, in the embodiment of the present invention, the display panel 100 further includes a signal processing unit 106. The signal processing unit 106 is connected to the first end of the crack detection line 103 and the first end of the auxiliary detection line 104, and is configured to send detection signals to the first end of the crack detection line 103 and the first end of the auxiliary detection line 104. In other words, the signal processing unit 105 is configured to generate detection signals and send the detection signals to the first end 11 of the crack detection line 103 and the first end 21 of the auxiliary detection line 104, respectively.
As shown in fig. 1, in some embodiments of the present invention, the signal processing unit 106 is disposed on a substrate of the display panel 100.
As shown in fig. 1, in the embodiment of the present invention, the signal processing unit 106 is connected to the crack detection unit 105, and is configured to receive a crack detection signal from the signal output terminal C of the crack detection unit 105 and determine whether a crack exists in the display panel 100 according to a waveform of the crack detection signal. In other words, in some embodiments of the present invention, the processing unit 106 is not only used for generating the detection signal, but also used for determining whether the display panel 100 has a crack according to the waveform of the crack detection signal.
It should be understood that, although in the embodiment of the present invention, the detection signal is generated by the signal processing unit 106, and whether or not the display panel 100 has a crack is determined according to the waveform of the crack detection signal, the present invention is not limited in this manner. For example, in some embodiments of the present invention, the detection signals may be generated and transmitted to the first end 11 of the crack detection line 103 and the first end 21 of the auxiliary detection line 104 by the crack detection unit 105, and then the presence or absence of a crack in the display panel 100 may be determined by the signal processing unit 106 according to the waveform of the crack detection signal. Alternatively, in some embodiments of the present invention, the detection signal may be generated by the signal processing unit 106, and then the crack detection signal may be generated by the crack detection unit 105, and whether the crack exists in the display panel 100 may be determined according to a waveform of the crack detection signal. In other words, the generation of the detection signal and the determination of whether the display panel 100 has a crack are not limited to the manner accomplished by the signal processing unit 106, but may be accomplished by various other manners. The idea of the present invention is to simultaneously transmit detection signals to the first ends 11 of the crack detection lines 103 and the first ends 21 of the auxiliary detection lines 104, then process the signals received at the second ends 12 of the crack detection lines 103 and the second ends 22 of the auxiliary detection lines 104 to obtain crack detection signals, and then determine whether cracks exist in the display panel 100 according to the waveforms of the crack detection signals. As for the generation of the detection signal, and specifically which module determines whether the display panel 100 has a crack, different processing manners may be selected according to needs, and the embodiments of the present invention only give some examples.
Illustratively, in some embodiments of the present invention, the signal processing unit 106 includes a display driving chip. The display driving chip (IC) has signal generation capability and waveform detection capability, so that the display driving chip is directly utilized to generate the detection signal, and whether the display panel 100 has cracks is determined according to the waveform of the crack detection signal, so that no additional hardware is required, and the complexity and cost of the display panel 100 are reduced.
It should be understood that although in some embodiments of the present invention the signal processing unit 106 is implemented as a display driving chip, in other embodiments, the signal processing unit 106 may be implemented as an external chip (e.g., a processing chip, such as a CPU, SOC, or other processing chip, that an electronic device using the display panel provided in the present embodiment has) or other structure, such as a signal processing unit separately provided, rather than a unit commonly owned by the display panel itself, such as a display driving chip. The external chip herein refers to being external with respect to the display panel 100, i.e., the chip does not belong to a constituent part of the display panel 100.
As shown in fig. 1, in some embodiments of the invention, the display panel 100 further comprises a detection resistor 107, and the detection resistor 107 is equal to the equivalent resistance of the crack detection line 103. That is, the detection resistance 107 is determined based on the magnitude of the equivalent resistance of the crack detection line 103. Illustratively, for example, in some embodiments of the invention, the sum of the equivalent resistances of the detection resistance 107 and the auxiliary detection line 104 is substantially the same as the magnitude of the equivalent resistance of the crack detection line 103, so that the transmission of the detection signal from the first end 11 to the second end 12 of the crack detection line 103 may have a similar effect as the transmission from the first end 21 to the second end 22 of the auxiliary detection line 104. In other words, if the display panel 100 has no cracks, the same signal will be received at the second end 12 of the crack detection line 103 and the second end 22 of the auxiliary detection line 104, whereas different signals are received. In other words, the detection resistor 107 may be set to compare with the transmission of the detection signal on the crack detection line 103, and then the received signal may be compared to determine whether a crack exists.
As shown in fig. 1, in some embodiments of the present invention, the sensing resistor 107 is disposed on the auxiliary sensing line 104. Alternatively, both ends of the detection resistor 107 are connected to the auxiliary detection line 104, and are connected to the crack detection unit 105 and the signal processing unit 106 through the auxiliary detection line, respectively.
As shown in fig. 1, in some embodiments of the present invention, the display panel 100 further includes a flexible circuit board 108. The flexible circuit board 108 is connected to a substrate of the display panel 100. The flexible circuit board is used to connect circuit signals of the display panel 100 to the outside. As shown in fig. 1, in some embodiments of the invention, the crack detection unit 105 and the detection resistor 107 are disposed on a flexible circuit board 108. The detection resistor 107 has one end connected to the signal processing unit 106 through the auxiliary detection line 104 and the other end connected to the crack detection unit 105 through the auxiliary detection line 104.
It should be understood that although the signal processing unit 106 is disposed on the substrate of the display panel 100 in the embodiment of the present invention, the signal processing unit 106 may be disposed on a flexible circuit board in other embodiments. In this case, the auxiliary sensing line 104 may also be disposed on the flexible circuit board 108.
In some embodiments of the invention, the crack detection unit 105 comprises an exclusive or circuit for exclusive or-ing the first test signal and the second test signal to generate the crack detection signal. The exclusive-or circuit may employ various suitable circuit configurations or arithmetic chips. Fig. 2 shows an example of an exclusive-or circuit, and the principle of crack detection of the display panel 100 according to the embodiment of the present invention will be described with reference to fig. 2 to 4.
Fig. 2 is a schematic structural diagram of an exclusive-or circuit of a display panel according to an embodiment of the present invention; FIG. 3 is a diagram of an example of a crack detection signal for a display panel according to an embodiment of the present invention; fig. 4 is another exemplary diagram of a crack detection signal of a display panel according to an embodiment of the present invention.
As shown in fig. 2, the exclusive-or circuit in the embodiment of the present invention receives the first test signal and the second test signal through the signal receiving terminals a and B of the crack detection unit 105, and then performs an exclusive-or operation on the first test signal and the second test signal to generate the crack detection signal Y4. Exemplarily, in the embodiment of the present invention, the xor circuit performs xor operation on the first test signal and the second test signal 4 times, specifically: firstly, carrying out first exclusive-or operation on a first test signal and a second test signal received by signal receiving ends A and B to obtain a signal Y1; performing a first exclusive-or operation on the first test signal and Y1 to obtain a signal Y2; and then, carrying out the first exclusive-or operation on the second test signal and Y2 to obtain a signal Y3, and then carrying out the first exclusive-or operation on Y2 and Y3 to obtain a signal Y4. It should be understood that fig. 2 is only an example of an exclusive-or circuit, and the exclusive-or circuit according to the embodiment of the present invention is not limited to the structure shown in fig. 2, and may be of various suitable circuit structures.
In some embodiments of the present invention, the detection signal sent by the signal processing unit 105 is an ac signal. As shown in fig. 3 and 4, when the first test signal and the second test signal received by the signal receiving terminals a and B of the crack detection unit 105 are the same signal, Y4 is a low level signal; when the first test signal and the second test signal received by the signal receiving terminals a and B of the crack detection unit 105 are the same signal, Y4 is a pulse signal.
In other words, when the display panel 100 is not cracked, the signals reaching the signal receiving terminals a and B are identical, and the exclusive or circuit 104 outputs Y4 ═ a ≦ B, and at this time, Y4 is a completely low signal. When the display panel 100 has a micro crack or a complete crack, the auxiliary detection line 104 normally transmits a signal, and thus the signal reaching the signal receiving terminal B is the same as the detection signal. Since the resistance of the crack detection line 103 becomes infinite or infinite, and the signal reaching the signal receiving terminal a is delayed or low relative to the signal reaching the signal receiving terminal B, no matter whether the display panel 100 is a micro crack or a complete crack, the output Y4 through the xor circuit unit is a.a.b., and an AC pulse signal should be used. The signal processing unit 106 detects the waveform of Y4, and if it is a low level signal, no crack occurs in the display panel 100; if it is an AC pulse signal, the display panel 100 is cracked.
Further, in some embodiments of the present invention, the signal processing unit 106 may estimate the resistance value variation after the crack of the display panel 100 occurs by estimating the width of the pulse width of the crack detection signal Y4, so as to estimate the crack degree of the display panel 100. Specifically, if the pulse width of the crack detection signal Y4 is larger, the amount of change in the resistance value after the crack of the display panel 100 is larger, and accordingly, the crack degree of the display panel 100 is more serious. Conversely, if the pulse width of the crack detection signal Y4 is smaller, the resistance value change amount after the crack of the display panel 100 is smaller, and accordingly, the crack degree of the display panel 100 is smaller.
Fig. 5 is a schematic flowchart of a crack detection method for a display panel according to an embodiment of the present invention.
A crack detection method 200 of a display panel according to an embodiment of the present invention is used for performing crack detection on the display panel 100 according to the embodiment of the present invention, as shown in fig. 5, the crack detection method 200 includes:
s201, detecting signals are input to the first end of the crack detecting line and the first end of the auxiliary detecting line through the signal processing unit.
Illustratively, in some embodiments of the present invention, the signal processing unit includes a display driving chip.
S202, receiving, by the crack detection unit, a first test signal output from the crack detection line from the second end of the crack detection line, and receiving a second test signal output from the auxiliary test line from the second end of the auxiliary detection line.
S203, processing the first test signal and the second test signal by the crack detection unit to generate a crack detection signal.
Illustratively, in some embodiments of the invention, the crack detection unit comprises an exclusive or circuit for exclusive or-ing the first test signal and the second test signal for generating the crack detection signal.
The structure and principle of the exclusive-or circuit are described in the foregoing description, and will not be described in detail herein.
And S204, judging whether the display panel has cracks or not according to the waveform of the crack detection signal.
Illustratively, in some embodiments of the present invention, the presence or absence of a crack in the display panel is determined according to the crack detection signal by a signal processing unit, such as a display driving chip. That is, the crack detection signal is transmitted to a signal processing unit, and the signal processing unit determines whether the display panel has a crack according to a waveform of the crack detection signal.
Exemplarily, in some embodiments of the present invention, as shown in fig. 3 and 4, the detection signal is an ac signal, and whether a crack exists in the display panel is determined according to a waveform of the crack detection signal, specifically:
if the crack detection signal is a low level signal, the display panel has no crack;
and if the crack detection signal is a pulse signal, the display panel has cracks.
Illustratively, in some embodiments of the present invention, when determining that there is a crack in the display panel, the crack detection method 200 further includes the following steps:
judging the resistance variation of the crack detection line according to the width of the pulse signal;
and judging the crack degree of the display panel according to the resistance variation of the crack detection line.
The specific method and principle for judging the crack degree of the display panel refer to the foregoing description, and are not repeated herein.
Fig. 6 is a schematic diagram illustrating a hardware structure of a computing device 600 according to an embodiment of the present invention.
The computing device 600 may include a processor 601 and a memory 602 that stores computer program instructions.
Specifically, the processor 601 may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present invention.
In one example, the Memory 602 may be a Read Only Memory (ROM). In one example, the ROM can be a mask-programmed ROM, a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), an Electrically Alterable ROM (EAROM), or a flash Memory or a combination of two or more of these.
The memory 602 may include Read Only Memory (ROM), Random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors), it is operable to perform operations described with reference to the methods according to an aspect of the present disclosure.
The processor 601 reads and executes the computer program instructions stored in the memory 602 to implement the methods/steps S201 to SS205 in the embodiment shown in fig. 5, and achieve the corresponding technical effects achieved by the embodiment shown in fig. 5 executing the methods/steps thereof, which are not described herein again for brevity.
In one example, computing device 600 may also include a communication interface 603 and a bus 610. As shown in fig. 6, the processor 601, the memory 602, and the communication interface 603 are connected via a bus 610 to complete communication therebetween.
The communication interface 603 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
In addition, in combination with the crack detection method of the display panel in the above embodiments, the embodiments of the present invention may be implemented by providing a computer storage medium. The computer storage medium having computer program instructions stored thereon; the computer program instructions, when executed by a processor, implement a crack detection method of a display panel of any of the above embodiments.
In addition, the embodiment of the invention also provides a display device which comprises the display panel provided by the embodiment of the invention and has similar advantages.
According to the display panel and the crack detection method, the display device and the computing equipment of the display panel, the crack detection line and the auxiliary detection line are arranged, the detection signals are respectively sent to the crack detection line and the auxiliary detection line, then the crack detection signals are generated by processing the signals received from the crack detection line and the auxiliary detection line, and whether the crack exists in the display panel is judged through the waveform of the crack detection signals, so that whether the crack exists in the display panel is judged through the waveform detection, the display panel has higher sensitivity, and the false detection rate and the missing detection rate of the screen body crack are reduced.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (13)
1. A display panel having a display area and a non-display area, comprising:
a crack detection line disposed in the non-display area, the crack detection line having a first end and a second end, the first end of the crack detection line for receiving a detection signal;
an auxiliary detection line having a first end and a second end, the first end of the auxiliary detection line for receiving the detection signal;
a crack detection unit connected to the second end of the crack detecting line and the second end of the auxiliary detecting line, for receiving a first test signal output from the second end of the crack detecting line and a second test signal output from the second end of the auxiliary detecting line;
the crack detection unit processes the first test signal and the second test signal to generate a crack detection signal, and judges whether the display panel has cracks or not according to the waveform of the crack detection signal;
the crack detection unit comprises an exclusive-OR circuit for performing exclusive-OR operation on the first test signal and the second test signal to generate the crack detection signal; the crack detection device also comprises a detection resistor, wherein the detection resistor is equal to the equivalent resistance of the crack detection line.
2. The display panel of claim 1, further comprising a signal processing unit connected with the first ends of the crack detection lines and the first ends of the auxiliary detection lines.
3. The display panel according to claim 2, wherein the signal processing unit is connected to the crack detection unit, and is configured to receive the crack detection signal and determine whether the display panel has a crack according to a waveform of the crack detection signal.
4. The display panel according to claim 2, wherein the signal processing unit includes a display driving chip.
5. The display panel according to claim 1, wherein the detection resistor is provided on the auxiliary detection line.
6. The display panel according to claim 5, further comprising:
the flexible circuit board is connected with a substrate of the display panel, the crack detection unit and the detection resistor are arranged on the flexible circuit board, one end of the detection resistor is connected with the auxiliary detection line, and the other end of the detection resistor is connected with the crack detection unit.
7. The display panel according to claim 1, wherein the detection signal is an alternating current signal.
8. The display panel of claim 1, wherein the crack detection line at least partially surrounds the display area.
9. The display panel according to claim 1, wherein the non-display region includes a bending region provided with the crack detection line.
10. A crack detection method of a display panel for crack detection of the display panel according to any one of claims 1 to 9, the crack detection method comprising:
inputting detection signals to a first end of the crack detection line and a first end of the auxiliary detection line through a signal processing unit;
receiving, by the crack detection unit, a first test signal output from the crack detection line from a second end of the crack detection line, and a second test signal output from the auxiliary detection line from a second end of the auxiliary detection line;
processing, by the crack detection unit, the first test signal and the second test signal to generate a crack detection signal;
judging whether the display panel has cracks or not according to the waveform of the crack detection signal;
the crack detection unit comprises an exclusive-or circuit, and is used for carrying out exclusive-or operation on the first test signal and the second test signal to generate the crack detection signal;
judging whether the display panel has cracks according to the waveform of the crack detection signal, specifically: if the crack detection signal is a low level signal, the display panel has no crack; if the crack detection signal is a pulse signal, the display panel has cracks;
when the display panel is judged to have cracks, the crack detection method further comprises the following steps:
judging the resistance variation of the crack detection line according to the width of the pulse signal;
and judging the crack degree of the display panel according to the resistance variation of the crack detection line.
11. The crack detection method of claim 10, wherein the signal processing unit comprises a display driver chip.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
13. A computing device, the device comprising: a processor, and a memory storing computer program instructions; the processor reads and executes the computer program instructions to implement the crack detection method of the display panel according to any one of claims 10-11.
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| KR102270632B1 (en) * | 2015-03-04 | 2021-06-30 | 삼성디스플레이 주식회사 | Display panel, display device and mtehod for driving display panel |
| KR102518922B1 (en) * | 2016-01-21 | 2023-04-07 | 삼성디스플레이 주식회사 | Display device and method of driving the same |
| CN106023865A (en) * | 2016-06-24 | 2016-10-12 | 上海与德科技有限公司 | Screen module, electronic equipment and micro-crack detection method for screen module |
| KR102531042B1 (en) * | 2018-04-05 | 2023-05-15 | 삼성전자 주식회사 | Display device including electrical wireing for detecting crack generated in adjacent area of opening formed on display and electronic device including the display device |
| CN110333268A (en) * | 2019-07-11 | 2019-10-15 | 京东方科技集团股份有限公司 | A kind of display panel, display device and crack detecting method |
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