CN111398355B - Display panel detection circuit and display device - Google Patents
Display panel detection circuit and display device Download PDFInfo
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- CN111398355B CN111398355B CN202010217931.2A CN202010217931A CN111398355B CN 111398355 B CN111398355 B CN 111398355B CN 202010217931 A CN202010217931 A CN 202010217931A CN 111398355 B CN111398355 B CN 111398355B
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- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The disclosure provides a display panel detection circuit and a display device. The display panel detection circuit comprises a first circuit unit and a second circuit unit. The first circuit units are arranged on two sides of the display panel bending area and used for detecting whether cracks appear on circuits on two sides of the bending area. The second line unit is arranged in the middle area of the bending area and used for detecting whether the line in the middle area of the bending area cracks or not. The problem that whether cracks occur in the middle area of the bending area cannot be detected or not is solved by adding the second circuit unit.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel detection circuit and a display device.
Background
The conventional Panel Crack Detection (PCD) method generally has 3 sets of PCD designs, as shown in fig. 1, including two sets of PCD for detecting a Panel, i.e., Panel PCD, and one set of PCD for detecting a Bending area (Bending area), i.e., Bending PCD. In the middle period, a group of Panel PCD2 is directly connected to an output and input port (IC output Pin) of an IC, and the IC detects a transmitting and receiving signal to detect whether the Panel has cracks. The other group of Panel PCD1 is connected to the IC output Pin to detect whether the Panel has cracks through IC detection transmitting and receiving signals, and is also connected to the binding terminal (FPC binding Pad) of the flexible circuit board, and can input a high signal through a needle on the terminal of the FPC binding Pad in a lighting test (cell test, CT) stage, and then confirm whether the Panel has cracks through whether bright lines appear when the Panel displays dark pictures. In addition, a set of special bonding PCD design for detecting whether cracks appear in the Bending area can detect through an IC signal receiving and transmitting or a dark picture method in a lighting test stage, but the bonding PCD design can only detect whether cracks appear at the left end and the right end of the Bending area, and cannot detect whether cracks appear in the middle area of the Bending area.
Therefore, the problem that whether cracks occur in the middle area of the bending area cannot be detected in the conventional PCD circuit design exists.
Disclosure of Invention
The disclosure provides a display panel detection circuit and a display device, which are used for solving the technical problem that whether cracks appear in the middle area of a bending area cannot be detected in the existing PCD circuit design.
In order to solve the above problems, the technical solution provided by the present disclosure is as follows:
the embodiment of the disclosure provides a display panel detection circuit, which comprises a terminal module and a line module. The terminal module includes a first terminal unit including a first output port and a first input port, and a second terminal unit including at least three terminals. The circuit module comprises a first circuit unit and a second circuit unit. The first line unit comprises a first connecting line, a second connecting line and a first detection line, one end of the first detection line is connected with one end of the first connecting line, the other end of the first detection line is connected with one end of the second connecting line, the other end of the first connecting line is simultaneously connected with the first output port and the first terminal of the second terminal unit, the other end of the second connecting line is simultaneously connected with the first input port and the second terminal of the second terminal unit, and the other end of the second connecting line is further connected with a first signal line. The second line unit comprises a third connecting line, a fourth connecting line and a second detection line, one end of the second detection line is connected with one end of the third connecting line, the other end of the second detection line is connected with one end of the fourth connecting line, the other end of the third connecting line is connected with a third terminal of the second terminal unit, and the other end of the fourth connecting line is connected with the first signal line and the first input port. The first detection lines cross over the bending area of the display panel and are arranged on two sides of the bending area of the display panel, and the second detection lines cross over the bending area of the display panel and are arranged in the middle area of the bending area.
In the display panel detection circuit provided by the embodiment of the present disclosure, the first terminal unit further includes a second output port, a second input port, a third output port, a third input port, a fourth output port, and a fourth input port.
In the display panel detection circuit provided by the embodiment of the present disclosure, the other end of the third connection line is also simultaneously connected to the second output port, and the other end of the fourth connection line is also simultaneously connected to the second input port.
In the detection circuit for a display panel provided by the embodiment of the present disclosure, the circuit module further includes a third circuit unit, the third circuit unit includes a fifth connection line, a sixth connection line and a third detection line, one end of the third detection line is connected to one end of the fifth connection line, the other end of the third detection line is connected to one end of the sixth connection line, the other end of the fifth connection line is connected to the third output port, and the other end of the sixth connection line is connected to the third input port.
In the detection circuit for a display panel provided by the embodiment of the present disclosure, the line module further includes a fourth line unit, the fourth line unit includes a seventh connection line, an eighth connection line, and a fourth detection line, one end of the fourth detection line is connected to one end of the seventh connection line, the other end of the fourth detection line is connected to one end of the eighth connection line, the other end of the seventh connection line is simultaneously connected to the fourth output port, the fourth terminal of the second terminal unit, and the third signal line, and the other end of the eighth connection line is simultaneously connected to the fourth input port, the fifth terminal of the second terminal unit, and the second signal line.
In the detection circuit for a display panel provided by the embodiment of the present disclosure, the detection display module further includes a detection display module, where the detection display module includes a first detection display unit, a second detection display unit, and a third detection display unit, the first detection display unit includes at least a first data line and a second data line, and a first switch tube corresponding to the first data line and a second switch tube corresponding to the second data line, control ends of the first switch tube and the second switch tube are both connected to a first control signal, an input end of the first switch tube is connected to the first signal line, and an output end of the first switch tube is connected to the first data line; the input end of the second switch tube is connected with a second control signal, and the output end of the second switch tube is connected with the second data line.
In the display panel detection circuit provided by the embodiment of the disclosure, the second detection display unit includes at least a third data line and a fourth data line, and a third switch tube corresponding to the third data line and a fourth switch tube corresponding to the fourth data line, control ends of the third switch tube and the fourth switch tube are both connected with the first control signal, an input end of the third switch tube is connected with the second signal line, and an output end of the third switch tube is connected with the third data line; the input end of the fourth switch tube is connected with the second control signal, and the output end of the fourth switch tube is connected with the fourth data line.
In the display panel detection circuit provided by the embodiment of the present disclosure, the third detection display unit includes at least a fifth data line and a sixth data line, a fifth switching tube corresponding to the fifth data line, and a sixth switching tube corresponding to the sixth data line, control ends of the fifth switching tube and the sixth switching tube are both connected to the first control signal, an input end of the fifth switching tube is connected to the third signal line, and an output end of the fifth switching tube is connected to the fifth data line; the input end of the sixth switching tube is connected with the second control signal, and the output end of the sixth switching tube is connected with the sixth data line.
In the display panel detection circuit provided by the embodiment of the present disclosure, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all thin film transistors.
The embodiment of the disclosure further provides a display device, which includes the display panel detection circuit of one of the foregoing embodiments.
The beneficial effects of this revelation do: in the display panel detection circuit and the display device provided by the disclosure, a group of second circuit units is additionally arranged in the middle area of the bending area of the display panel to detect whether the circuit in the middle area of the bending area has cracks. The second line unit is connected with the first terminal unit and the second terminal unit simultaneously, namely the detection can be controlled by the first terminal unit, and the detection can also be controlled by the second terminal unit, so that the reliability of line crack detection in the middle area of the bending area is improved. The problem of whether crackle appears in current PCD circuit design existence unable detection bending zone middle zone is solved.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a crack detection circuit of a display panel in the prior art;
FIG. 2 is a schematic diagram illustrating a first structure of a display panel detection circuit according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a detection principle of a display panel detection circuit according to an embodiment of the disclosure;
fig. 4 is a schematic diagram of a second structure of a display panel detection circuit according to an embodiment of the disclosure.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the disclosure may be practiced. Directional phrases used in this disclosure, such as [ upper ], [ lower ], [ front ], [ back ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for the purpose of illustration and understanding of the present disclosure, and are not used to limit the present disclosure. In the drawings, elements having similar structures are denoted by the same reference numerals.
In one embodiment, as shown in fig. 2, a display panel detection circuit 100 is provided, which includes a terminal module 1 and a line module 2. The terminal module 1 comprises a first terminal unit 10 and a second terminal unit 20, the first terminal unit 10 comprising a first output port 12 and a first input port 11, the second terminal unit 20 comprising at least three terminals. The line module 2 includes a first line unit 30 and a second line unit 40, the first line unit 30 includes a first connection line 31, a second connection line 32 and a first detection line 33, one end of the first detection line 33 is connected to one end of the first connection line 31, the other end of the first detection line 33 is connected to one end of the second connection line 32, the other end of the first connection line 31 is simultaneously connected to the first output port 12 and the first terminal 21 of the second terminal unit 20, the other end of the second connection line 32 is simultaneously connected to the first input port 11 and the second terminal 22 of the second terminal unit 20, and the other end of the second connection line 32 is further connected to a first signal line ODD 1. The second line unit 40 includes a third connection line 41, a fourth connection line 42, and a second detection line 43, one end of the second detection line 43 is connected to one end of the third connection line 41, the other end of the second detection line 43 is connected to one end of the fourth connection line 42, the other end of the third connection line 41 is connected to the third terminal 23 of the second terminal unit 20, and the other end of the fourth connection line 42 is connected to the first signal line ODD1 and the first input port 11. The first detection lines 33 cross over the display panel bending area BA and are disposed at two sides of the display panel bending area BA, and the second detection lines 43 cross over the display panel bending area BA and are disposed at a middle area of the bending area BA.
Specifically, the first terminal unit 10 is used to connect an IC packaged on the display panel. The first terminal unit 10 includes multiple sets of output and input ports, such as a first output port 12, a first input port 11, a second output port 14, a second input port 13, a third output port 16, a third input port 15, a fourth output port 18, and a fourth input port 17 in fig. 2. The first terminal unit 10 is used to detect whether cracks occur by transmitting and receiving signals.
Specifically, as shown in fig. 2, the first line unit 30 is configured to detect whether a line on two sides of the bending area BA has a crack, when the crack is detected, the first output port 12 of the first terminal unit 10 outputs a signal, and when the line on two sides of the bending area BA has a crack, the first input port 11 does not receive the signal output by the first output port 12, and a bright line appears on the display panel; when the lines on both sides of the bending area BA are not cracked, the first input port 11 receives the signal output by the first output port 12, and no bright line appears on the display panel.
Specifically, the second terminal unit 20 is a plurality of terminal pads disposed on a flexible circuit board of the display panel, and is used for detecting a crack of the panel by inserting an input signal into the terminal in the lighting test stage. I.e. the second terminal unit 20 may be used for PCD testing during the lighting test phase.
Specifically, as shown in fig. 2, the first line unit 30 may further detect whether a crack occurs in the line on both sides of the bending area BA by using a signal of the second terminal unit 20, when the crack is detected, a high potential is input to the first terminal 21 of the second terminal unit 20 by pricking, and when the crack occurs on both sides of the bending area BA, the high potential does not reach the first signal line ODD 1; when no crack occurs on both sides of the bending area BA, a high potential reaches the first signal line ODD 1.
Further, as shown in fig. 2, the line module 2 further includes a third line unit 50, the third line unit 50 includes a fifth connection line 51, a sixth connection line 52 and a third detection line 53, one end of the third detection line 53 is connected to one end of the fifth connection line 51, the other end of the third detection line 53 is connected to one end of the sixth connection line 52, the other end of the fifth connection line 51 is connected to the third output port 16, and the other end of the sixth connection line 52 is connected to the third input port 15.
Further, as shown in fig. 2, the line module 2 further includes a fourth line unit 60, the fourth line unit 60 includes a seventh connection line 61, an eighth connection line 62 and a fourth detection line 63, one end of the fourth detection line 63 is connected to one end of the seventh connection line 61, the other end of the fourth detection line 63 is connected to one end of the eighth connection line 62, the other end of the seventh connection line 61 is simultaneously connected to the fourth output port 18, the fourth terminal 24 of the second terminal unit 20 and the third signal line ODD3, and the other end of the eighth connection line 62 is simultaneously connected to the fourth input port 17, the fifth terminal 25 of the second terminal unit 20 and the second signal line ODD 2.
Further, as shown in fig. 3, the display panel inspection circuit further includes an inspection display module, the inspection display module includes a first inspection display unit 70, a second inspection display unit 80 and a third inspection display unit 90, the first inspection display unit 70 includes at least a first data line 711 and a second data line 712, a first switch tube T1 corresponding to the first data line 711 and a second switch tube T2 corresponding to the second data line 712, control ends of the first switch tube T1 and the second switch tube T2 are both connected to a first control signal EN, an input end of the first switch tube T1 is connected to the first signal line ODD1, and an output end of the first switch tube T1 is connected to the first data line 711; the input end of the second switch tube T2 is connected to a second control signal EVEN, and the output end of the second switch tube T2 is connected to the second data line 712.
Specifically, the second detecting and displaying unit 80 includes at least a third data line 811, a fourth data line 812, a third switching tube T3 corresponding to the third data line 811, and a fourth switching tube T4 corresponding to the fourth data line 812, wherein control terminals of the third switching tube T3 and the fourth switching tube T4 are both connected to the first control signal EN, an input terminal of the third switching tube T3 is connected to the second signal line ODD2, and an output terminal of the third switching tube T3 is connected to the third data line 811; the input end of the fourth switch tube T4 is connected to the second control signal EVEN, and the output end of the fourth switch tube T4 is connected to the fourth data line 812.
Specifically, the third detecting and displaying unit 90 includes at least a fifth data line 911 and a sixth data line 912, a fifth switching tube T5 corresponding to the fifth data line 911, and a sixth switching tube T6 corresponding to the sixth data line 912, wherein control ends of the fifth switching tube T5 and the sixth switching tube T6 are both connected to the first control signal EN, an input end of the fifth switching tube T5 is connected to the third signal line ODD3, and an output end of the fifth switching tube T5 is connected to the fifth data line 911; the input terminal of the sixth switching tube T6 is connected to the second control signal EVEN, and the output terminal of the sixth switching tube T6 is connected to the sixth data line 912.
It should be noted that, each detection display module in fig. 3 exemplarily shows 4 data lines and 4 corresponding switch tubes, but the disclosure is not limited thereto. In addition, fig. 2 shows only an exemplary portion of each detection unit, such as the left portion of the first line unit, the third line unit, and the fourth line unit in fig. 2, and the right portion symmetrical to the left portion is not shown.
Specifically, the first switching tube T1, the second switching tube T2, the third switching tube T3, the fourth switching tube T4, the fifth switching tube T5 and the sixth switching tube T6 are all thin film transistors. The first switch tube T1, the second switch tube T2, the third switch tube T3, the fourth switch tube T4, the fifth switch tube T5 and the sixth switch tube T6 can be manufactured in the same process as the thin film transistor on the array substrate.
Further, the connection lines (the first connection lines 31, the second connection lines 32, etc.) and the sensing lines (the first sensing lines 33, the second sensing lines 43, etc.) in each line unit (the first line unit 30, the second line unit 40, etc.) of the present disclosure may be fabricated under the same process as each data line (the first data line 711, the second data line 712, etc.).
Furthermore, the first data line 711, the third data line 811 and the fifth data line 911 provide voltages for the corresponding green sub-pixels, and the second data line 712, the fourth data line 812 and the sixth data line 912 provide voltages for the corresponding red and blue sub-pixels.
Specifically, the detection principle of the display panel detection circuit is described below by taking the second line unit 40 and the fourth line unit 60 as an example.
Specifically, the second line unit 40 is used for detecting whether a line in the middle area of the bending area BA has a crack. Referring to fig. 2 and 3, during testing, a high-potential signal is input to the third terminal 23 of the second terminal unit 20 through a needle, and when no crack occurs in the middle area of the bending area BA, the high-potential signal reaches the first signal line ODD 1. Referring to the first detecting and displaying unit 70 in fig. 3, when crack detection is started, the first control signal EN controls the first switch tube T1 to be turned on, the high-potential signal of the first signal line ODD1 reaches the first data line 711 through the input end of the first switch tube T1 and the output end of the first switch tube T1, and the sub-pixel corresponding to the first data line 711 displays a bright line after obtaining the high-potential signal.
Further, when the line in the middle area of the bending area BA is cracked, the high potential signal does not reach the first signal line ODD 1. In fig. 3, the voltage on the first data line 711 is low, so that the sub-pixels corresponding to the first data line 711 are not lighted, and a dark image is displayed.
Further, during the detection, the second control signal EVEN maintains the low-level signal reaching the second data line 712 through the second switching tube T2, so that the sub-pixel corresponding to the second data line 712 displays the dark image. Therefore, when the circuit in the middle area of the bending area BA has cracks, all areas display dark pictures.
Specifically, the fourth line unit 60 is used to detect whether cracks occur in the panel, and the fourth line unit 60 may be used to perform PCD detection in the lighting test phase. Referring to fig. 2 and 3, during the PCD test in the lighting test phase, a high potential signal is input to the fourth terminal 24 of the second terminal unit 20 through a needle, and when there is no crack in the circuit in the panel, the high potential signal reaches the second signal line ODD 2. Referring to the second detecting and displaying unit 80 in fig. 3, when the crack detection is started, the first control signal EN controls the third switching tube T3 to be turned on, the high-level signal of the second signal line ODD2 reaches the third data line 811 through the input end of the third switching tube T3 and the output end of the third switching tube T3, and the sub-pixel corresponding to the third data line 811 displays a bright line after obtaining the high-level signal.
Further, when the in-plane wiring is cracked, the high potential signal does not reach the second signal line ODD 2. In fig. 3, the third data line 811 is at a low voltage level, so that the sub-pixels corresponding to the third data line 811 are not lighted, and a dark image is displayed.
Further, during the detection, the second control signal EVEN maintains the low-level signal to reach the fourth data line 812 through the fourth switching tube T4, so that the sub-pixel corresponding to the fourth data line 812 displays the dark image. Thus, when cracks appear in the bending area, all areas display dark pictures.
Further, when the lighting test is performed in the lighting test stage, a high potential signal is input to the fifth terminal 25 of the second terminal unit 20 through a needle, and when no crack occurs in the in-plane line, the high potential signal reaches the third signal line ODD 3. Referring to the third detecting and displaying unit 90 in fig. 3, when crack detection is started, the first control signal EN controls the fifth switch tube T5 to be turned on, the high-potential signal of the third signal line ODD3 reaches the fifth data line 911 through the input end of the fifth switch tube T5 and the output end of the fifth switch tube T5, and the sub-pixel corresponding to the fifth data line 911 displays a bright line after obtaining the high-potential signal.
Further, when the in-plane line is cracked, the high potential signal does not reach the third signal line ODD 3. In fig. 3, the voltage on the fifth data line 911 is low, so that the sub-pixel corresponding to the fifth data line 911 is not turned on, and a dark image is displayed.
Further, during the detection, the second control signal EVEN maintains the low-level signal to reach the sixth data line 912 through the sixth switching tube T6, so that the sub-pixel corresponding to the sixth data line 912 displays the dark image. Thus, when cracks appear in the bending area BA, all areas display dark pictures.
Further, the fourth line unit 60 may also be controlled by the first terminal unit 10 to perform PCD detection. During detection, the fourth output port 18 of the first terminal unit 10 outputs a high potential signal, and when no crack occurs in the surface, the fourth input port 17 receives the high potential signal and a bright line appears; when a crack occurs in the surface, the fourth input port 17 does not receive a high potential signal.
Further, the detection principle of the first line unit 30 and the third line unit 50 may refer to the second line unit 40 or the fourth line unit 60, which is not described herein again.
In another embodiment, different from the above embodiments, the second circuit unit 40' of the display panel detection circuit 101 shown in fig. 4 may also be controlled by the first terminal unit 10 to perform PCD detection. The other end of the third connection line 41 'is also simultaneously connected to the second output port 14, and the other end of the fourth connection line 42' is also simultaneously connected to the second input port 13. For other descriptions, please refer to the above embodiments, which are not repeated herein.
In one embodiment, a display device is provided, which includes the display panel detection circuit of one of the above embodiments.
According to the above embodiments:
the invention provides a display panel detection circuit and a display device, which are used for detecting whether a line in the middle area of a bending area of a display panel cracks or not by additionally arranging a group of second line units in the middle area of the bending area of the display panel. The second line unit is connected with the first terminal unit and the second terminal unit simultaneously, and therefore the detection can be controlled by the first terminal unit and also can be controlled by the second terminal unit, and the reliability of line crack detection in the middle area of the bending area is improved. The problem of whether crackle appears in current PCD circuit design existence unable detection bending zone middle zone is solved.
In summary, although the present disclosure has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present disclosure, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, so that the scope of the present disclosure is defined by the appended claims.
Claims (10)
1. The display panel detection circuit is characterized by comprising a terminal module and a line module, wherein the terminal module comprises a first terminal unit and a second terminal unit, the first terminal unit comprises a first output port and a first input port, and the second terminal unit comprises at least three terminals; the line module includes:
a first line unit including a first connection line, a second connection line and a first detection line, one end of the first detection line being connected to one end of the first connection line, the other end of the first detection line being connected to one end of the second connection line, the other end of the first connection line being simultaneously connected to the first output port and a first terminal of the second terminal unit, the other end of the second connection line being simultaneously connected to the first input port and a second terminal of the second terminal unit, and the other end of the second connection line being further connected to a first signal line; and
a second line unit including a third connection line, a fourth connection line, and a second detection line, one end of the second detection line being connected to one end of the third connection line, the other end of the second detection line being connected to one end of the fourth connection line, the other end of the third connection line being connected to a third terminal of the second terminal unit, and the other end of the fourth connection line being connected to the first signal line and the first input port;
the first detection line crosses over the display panel bending area and is arranged on two sides of the display panel bending area, and the second detection line crosses over the display panel bending area and is arranged in the middle area of the bending area.
2. The display panel detection circuit of claim 1, wherein the first terminal unit further comprises a second output port, a second input port, a third output port, a third input port, a fourth output port, and a fourth input port.
3. The detection circuit of claim 2, wherein the other end of the third connection line is also simultaneously connected to the second output port, and the other end of the fourth connection line is also simultaneously connected to the second input port.
4. The display panel detection circuit according to claim 2 or 3, wherein the line module further comprises a third line unit, the third line unit comprises a fifth connection line, a sixth connection line and a third detection line, one end of the third detection line is connected to one end of the fifth connection line, the other end of the third detection line is connected to one end of the sixth connection line, the other end of the fifth connection line is connected to the third output port, and the other end of the sixth connection line is connected to the third input port.
5. The display panel detection circuit according to claim 4, wherein the line module further includes a fourth line unit, the fourth line unit includes a seventh connection line, an eighth connection line, and a fourth detection line, one end of the fourth detection line is connected to one end of the seventh connection line, the other end of the fourth detection line is connected to one end of the eighth connection line, the other end of the seventh connection line is simultaneously connected to the fourth output port, the fourth terminal of the second terminal unit, and the third signal line, and the other end of the eighth connection line is simultaneously connected to the fourth input port, the fifth terminal of the second terminal unit, and the second signal line.
6. The display panel detection circuit according to claim 5, further comprising a detection display module, wherein the detection display module comprises a first detection display unit, a second detection display unit and a third detection display unit, the first detection display unit comprises at least a first data line and a second data line, a first switch tube corresponding to the first data line and a second switch tube corresponding to the second data line, the control ends of the first switch tube and the second switch tube are connected to a first control signal, the input end of the first switch tube is connected to the first signal line, and the output end of the first switch tube is connected to the first data line; the input end of the second switch tube is connected with a second control signal, and the output end of the second switch tube is connected with the second data line.
7. The display panel detection circuit according to claim 6, wherein the second detection display unit comprises at least a third data line and a fourth data line, a third switch tube corresponding to the third data line and a fourth switch tube corresponding to the fourth data line, control ends of the third switch tube and the fourth switch tube are both connected with the first control signal, an input end of the third switch tube is connected with the second signal line, and an output end of the third switch tube is connected with the third data line; the input end of the fourth switch tube is connected with the second control signal, and the output end of the fourth switch tube is connected with the fourth data line.
8. The display panel detection circuit according to claim 7, wherein the third detection display unit comprises at least a fifth data line and a sixth data line, a fifth switching tube corresponding to the fifth data line, and a sixth switching tube corresponding to the sixth data line, wherein control ends of the fifth switching tube and the sixth switching tube are both connected to the first control signal, an input end of the fifth switching tube is connected to the third signal line, and an output end of the fifth switching tube is connected to the fifth data line; the input end of the sixth switching tube is connected with the second control signal, and the output end of the sixth switching tube is connected with the sixth data line.
9. The display panel detection circuit according to claim 8, wherein the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all thin film transistors.
10. A display device characterized by comprising the display panel detection circuit according to any one of claims 1 to 9.
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| CN202010217931.2A CN111398355B (en) | 2020-03-25 | 2020-03-25 | Display panel detection circuit and display device |
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