Display panel, detection method thereof and display device

Abstract

The invention discloses a display panel, a detection method thereof and a display device. The display panel comprises a plurality of rows of terminal line pairs and a plurality of data lines, a plurality of first detection switches and first detection signal lines, the first ends of the first detection switches are electrically connected with the first detection signal lines, and the second ends of the first detection switches are electrically connected with the terminal lines; the first ends of the second detection switches are electrically connected with the second detection signal lines, and the second ends of the second detection switches are electrically connected with the terminal lines; a plurality of third detection switches and third detection signal lines, the first ends of the third detection switches are electrically connected with the third detection signal lines, and the second ends of the third detection switches are electrically connected with one terminal line in the terminal line pair of the odd number of columns; the first end of each fourth detection switch is electrically connected with the corresponding fourth detection signal line, and the second end of each fourth detection switch is electrically connected with one terminal line in the terminal line pair in the even number column. According to the invention, the comprehensiveness of detection of the terminal line in the display panel can be improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a detection method thereof, and a display device. Background Art

[0002] With the development of display technology, the application of display panels is becoming more and more extensive, and correspondingly, the requirements for display panels are becoming higher and higher.

[0003] Before the display panel leaves the factory, it is necessary to perform image quality and abnormality detection, namely Cell Test. The current methods for detecting display panels include the LCD Quicker method, which is to connect the terminal lines of the even columns to the same detection signal line, and connect the terminal lines of the odd columns to the same detection signal line. This method can detect whether there is a short circuit problem between the terminal lines of the odd columns and the terminal lines of the even columns; however, it is impossible to detect whether there is a short circuit problem between the terminal lines of the odd columns, and whether there is a short circuit problem between the terminal lines of the even columns. In other words, the detection method of the display panel in the related art has the problem of insufficient comprehensive detection of the terminal lines. Summary of the invention

[0004] The present invention provides a display panel and a detection method thereof, and a display device, so as to improve the comprehensiveness of the detection of terminal lines in the display panel.

[0005] According to one aspect of the present invention, there is provided a display panel, the display panel comprising:

[0006] A plurality of columns of terminal line pairs and a plurality of data lines, wherein each column of the terminal line pairs comprises two terminal lines extending in a column direction and adjacent to each other; each terminal line is electrically connected to a data line; wherein the terminal lines in the odd columns are in different layers from the terminal lines in the even columns;

[0007] A plurality of first detection switches and first detection signal lines, wherein a first end of the first detection switch is electrically connected to the first detection signal line, and a second end of the first detection switch is electrically connected to the terminal line of an odd-numbered column;

[0008] A plurality of second detection switches and second detection signal lines, wherein a first end of the second detection switch is electrically connected to the second detection signal line, and a second end of the second detection switch is electrically connected to the terminal line of an even-numbered column;

[0009] A plurality of third detection switches and third detection signal lines, wherein a first end of the third detection switch is electrically connected to the third detection signal line, and a second end of the third detection switch is electrically connected to one of the terminal lines in an odd-numbered column of the terminal line pair;

[0010] A plurality of fourth detection switches and fourth detection signal lines, wherein a first end of the fourth detection switch is electrically connected to the fourth detection signal line, and a second end of the fourth detection switch is electrically connected to one of the terminal lines in an even-numbered column.

[0011] Optionally, the display panel includes a display area and a non-display area at least partially surrounding the display area;

[0012] The data line is arranged in the display area; the first detection switch, the second detection switch, the third detection switch, the fourth detection switch, the first detection signal line, the second detection signal line, the third detection signal line and the fourth detection signal line are located in the non-display area.

[0013] Optionally, the non-display area includes a first non-display area and a second non-display area located at both sides of the display area along a column direction;

[0014] The first detection switch, the first detection signal line, the second detection switch and the second detection signal line are located in the first non-display area;

[0015] The second end of the first detection switch is electrically connected to the corresponding terminal line through the data line; the second end of the second detection switch is electrically connected to the corresponding terminal line through the data line;

[0016] The third detection switch, the third detection signal line, the fourth detection switch and the fourth detection signal line are located in the second non-display area.

[0017] Optionally, the display panel includes a display area and a non-display area at least partially surrounding the display area; the non-display area includes a binding area, and the binding area is used to bind the driving chip;

[0018] The third detection switch, the third detection signal line, the fourth detection switch, and the fourth detection signal line are located in the binding area.

[0019] Optionally, one end of the terminal wire is electrically connected to another terminal wire, and the other end of the terminal wire extends to the binding area.

[0020] Optionally, the display panel further includes:

[0021] A first control signal line, a control end of the first detection switch and a control end of the second detection switch are electrically connected to the first control signal line;

[0022] A second control signal line, a control end of the third detection switch and a control end of the fourth detection switch are electrically connected to the second control signal line.

[0023] Optionally, the first detection switch includes a first transistor, a first end of the first transistor serves as the first end of the first detection switch, and a second end of the first transistor serves as the second end of the first detection switch;

[0024] The second detection switch includes a second transistor, a first end of the second transistor serves as the first end of the second detection switch, and a second end of the second transistor serves as the second end of the second detection switch;

[0025] The third detection switch comprises a third transistor, a first end of the third transistor serves as the first end of the third detection switch, and a second end of the third transistor serves as the second end of the third detection switch;

[0026] The fourth detection switch includes a fourth transistor, a first end of the fourth transistor serves as the first end of the fourth detection switch, and a second end of the fourth transistor serves as the second end of the fourth detection switch.

[0027] According to another aspect of the present invention, a display device is provided, comprising the display panel as described above.

[0028] According to another aspect of the present invention, a display panel detection method is provided, which is used to detect the display panel as described above. The display panel detection method includes:

[0029] In the first detection stage, the first detection switch and the second detection switch are controlled to be turned on; and a first level signal is input to one of the first detection signal line and the second detection signal line and a second level signal is input to the other in the same frame; and whether the terminal line of the display panel is abnormal is determined according to the display screen of the display panel;

[0030] In the second detection stage, the third detection switch and the fourth detection switch are controlled to be turned on; and in the same frame, a first level signal is input to one of the third detection signal line and the fourth detection signal line, and a second level signal is input to the other; and whether the terminal line of the display panel is abnormal is determined based on the display screen of the display panel.

[0031] Optionally, the detection method further comprises:

[0032] In two adjacent frames of the first detection phase, one of the frames inputs a first level signal to the first detection signal line and a second level signal to the second detection signal line; the other frame inputs a second level signal to the first detection signal line and a first level signal to the second detection signal line;

[0033] In two adjacent frames of the second detection stage, one frame inputs a first level signal to the third detection signal line and a second level signal to the fourth detection signal line; the other frame inputs a second level signal to the third detection signal line and a first level signal to the fourth detection signal line.

[0034] The technical solution of the embodiment of the present invention adopts a display panel including: a plurality of columns of terminal line pairs and a plurality of data lines, each column of terminal line pairs includes two terminal lines extending in the column direction and adjacent to each other; each terminal line is electrically connected to a data line; wherein the terminal lines of the odd columns are in different layers from the terminal lines of the even columns; a plurality of first detection switches and first detection signal lines, wherein the first end of the first detection switch is electrically connected to the first detection signal line, and the second end of the first detection switch is electrically connected to a terminal line of the odd columns; a plurality of second detection switches and second detection signal lines, wherein the first end of the second detection switch is electrically connected to the second detection signal line, and the second end of the second detection switch is electrically connected to a terminal line of the even columns; a plurality of third detection switches and third detection signal lines, wherein the first end of the third detection switch is electrically connected to the third detection signal line, and the second end of the third detection switch is electrically connected to a terminal line of a terminal line pair of an odd column; and a plurality of fourth detection switches and fourth detection signal lines, wherein the first end of the fourth detection switch is electrically connected to the fourth detection signal line, and the second end of the fourth detection switch is electrically connected to a terminal line of a terminal line pair of an even column. When it is necessary to determine whether terminal lines of different layers are short-circuited, the first detection switch and the second detection switch are turned on, and signals of different levels are transmitted to the first detection signal line and the second detection signal line, and whether a short circuit exists is determined by displaying a picture. When it is necessary to determine whether terminal lines of the same layer are short-circuited, the third detection switch and the fourth detection switch are turned on, and signals of different levels are transmitted to the third detection signal line and the fourth detection signal line, and whether a short circuit exists is determined by displaying a picture. In summary, the display panel of this embodiment can test whether terminal lines of different layers have short-circuit problems, and can also test whether terminal lines of the same layer have short-circuit problems, and can perform more comprehensive tests on the terminal lines in the display panel.

[0035] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0038] Figure 2 A cross-sectional view of a display panel provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of a structure in which a terminal line is short-circuited in a display panel provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of a structure in which a terminal line is short-circuited in another display panel provided by an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the structure of a display device provided by an embodiment of the present invention;

[0043] Figure 7 A flow chart of a display panel detection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] Figure 1 A schematic diagram of a display panel according to an embodiment of the present invention is provided. Figure 1 , the display panel includes:

[0047] A plurality of columns of terminal line pairs and a plurality of data lines, each column of terminal line pairs comprising two terminal lines extending in a column direction Y and adjacent to each other; each terminal line is electrically connected to a data line; wherein the terminal lines in the odd columns are in different layers from the terminal lines in the even columns;

[0048] A plurality of first detection switches K1 and a first detection signal line Te1, wherein a first end of the first detection switch K1 is electrically connected to the first detection signal line Te1, and a second end of the first detection switch K1 is electrically connected to a terminal line of an odd-numbered column;

[0049] A plurality of second detection switches K2 and a second detection signal line Te2, wherein a first end of the second detection switch K2 is electrically connected to the second detection signal line Te2, and a second end of the second detection switch K2 is electrically connected to a terminal line of an even-numbered column;

[0050] A plurality of third detection switches K3 and a third detection signal line Te3, wherein a first end of the third detection switch K3 is electrically connected to the third detection signal line Te3, and a second end of the third detection switch K3 is electrically connected to a terminal line in a terminal line pair of an odd number column;

[0051] A plurality of fourth detection switches K4 and fourth detection signal lines Te4, a first end of the fourth detection switch K4 is electrically connected to the fourth detection signal line Te4, and a second end of the fourth detection switch K4 is electrically connected to a terminal line in a terminal line pair of an even column.

[0052] Specifically, the display panel includes a plurality of data lines, which extend along the column direction Y, and the plurality of data lines are arranged along the row direction X. The data lines are used to provide data voltages for the pixel driving circuit in the display panel, and the pixel driving circuit can drive the corresponding sub-pixels to emit corresponding grayscales according to the data voltage. The specific circuit structure and working principle of the pixel driving circuit are well known to those skilled in the art and will not be described here. The display panel also includes a plurality of terminal lines, which can also be understood as signal leads, which are used to realize the electrical connection between the driving chip and the data lines. In other words, the data signals transmitted in the driving chip are written into the corresponding data lines through the terminal lines. Figure 1As shown, in this embodiment, the first data line S1, the second data line S2, ... the eleventh data line S11 and the twelfth data line S12 are exemplarily shown. The first terminal line L1, the second terminal line L2, ... the eleventh terminal line L11 and the twelfth terminal line L12 are also schematically shown. Among them, a plurality of terminal lines are divided into terminal lines of odd columns and terminal lines of even columns. The terminal lines of odd columns include the first terminal line L1, the third terminal line L3, the fifth terminal line L5, the seventh terminal line L7, the ninth terminal line L9 and the eleventh terminal line L11. The terminal lines of even columns include the second terminal line L2, the fourth terminal line L4, the sixth terminal line L6, the eighth terminal line L8, the tenth terminal line L10 and the twelfth terminal line L12. It should be noted that, in the present embodiment, the terminal lines of odd-numbered columns may be understood as terminal lines electrically connected to the data lines of odd-numbered columns; the corresponding terminal lines of even-numbered columns may be understood as terminal lines electrically connected to the data lines of even-numbered columns. Two adjacent terminal lines may be understood as two terminal lines electrically connected to two adjacent data lines. The orthographic projections of two adjacent terminal lines in the thickness direction of the display panel may overlap or may be staggered. It should be noted that the terminal line may not be a straight line parallel to the column direction. The terminal line may be a straight line with a certain angle to the column direction, or the terminal line may be a broken line, as long as the extension direction of the terminal line is the column direction. The terminal lines of odd-numbered columns and the terminal lines of even-numbered columns are located in different film layers, such as Figure 2 As shown, Figure 2 A cross-sectional view of a display panel provided in an embodiment of the present invention, for example, the display panel includes a first metal layer and a second metal layer, the first metal layer is used to set the gate of the transistor in the pixel driving circuit, and the second metal layer is used to set the source and drain of the transistor in the pixel driving circuit. One of the terminal lines of the odd columns and the terminal lines of the even columns can be set in the first metal layer, and the other can be set in the second metal layer. The first metal layer and the second metal layer are separated by an insulating layer. It should be noted that in some other embodiments, the terminal lines can also be set in more metal layers, such as distributing the terminal lines in three metal layers, and the same terminal line is located in one metal layer. In some other embodiments, different parts of the same terminal line can also be located in different metal layers. Since there are many area wirings for setting the terminal lines in the display panel, by setting multiple terminal lines in two metal layers, the overall area occupied by the terminal lines can be reduced. However, since the wiring of the terminal lines is relatively compact, it is easier to short-circuit than the data lines.

[0053] In addition, the plurality of terminal lines in the display panel are divided into a plurality of columns of terminal line pairs, each column of terminal line pairs includes two adjacent terminal lines, that is, each column of terminal line pairs includes a terminal line of an odd column and a terminal line of an even column, and the two terminal lines in each column of terminal line pairs are located in different layers. Exemplarily, the first column of terminal line pairs includes a first terminal line L1 and a second terminal line L2; the second column of terminal line pairs includes a third terminal line L3 and a fourth terminal line L4; the third column of terminal line pairs includes a fifth terminal line L5 and a sixth terminal line L6; the fourth column of terminal line pairs includes a seventh terminal line L7 and an eighth terminal line L8; the fifth column of terminal line pairs includes a ninth terminal line L9 and a tenth terminal line L10; the sixth column of terminal line pairs includes an eleventh terminal line L11 and a twelfth terminal line L12.

[0054] Each odd-numbered column terminal line is connected to a corresponding first detection switch K1, and terminal lines of different odd-numbered columns are connected to different first detection switches K1. Each even-numbered column terminal line is connected to a corresponding second detection switch K2, and terminal lines of different even-numbered columns are connected to different second detection switches K2. In other words, all the terminal lines of odd-numbered columns are connected to the same first detection signal line Te1 through the corresponding first detection switch K1, and all the terminal lines of even-numbered columns are connected to the same second detection signal line Te2 through the corresponding second detection switch K2. When it is necessary to detect whether the terminal lines of different layers of the display panel are short-circuited, signals of different levels can be transmitted to the first detection signal line Te1 and the second detection signal line Te2 for detection. Figure 3 As shown, Figure 3 A schematic diagram of a structure in which a terminal line is short-circuited in a display panel provided by an embodiment of the present invention, wherein Figure 3, the first terminal line L1 and the second terminal line L2 are short-circuited (the short-circuit connection is indicated by a black block). A first level signal (such as a high level) is transmitted to the first detection signal line Te1, a second level signal (such as a low level) is transmitted to the second detection signal line Te2, and all first detection switches K1 and all second detection switches K2 are controlled to be turned on. If the first terminal line L1 and the second terminal line L2 are not short-circuited, the sub-pixel corresponding to the first terminal line L1 should display the grayscale corresponding to the first level signal, and the sub-pixel corresponding to the second terminal line L2 should display the grayscale corresponding to the second level signal. If the first terminal line L1 and the second terminal line L2 are short-circuited, the first terminal line L1 will be electrically connected to the second detection signal line Te2, and the signal on the first terminal line L1 will be lower than the first level signal and higher than the second level signal, that is, the sub-pixel corresponding to the first terminal line L1 will display a grayscale different from the grayscale corresponding to the first level signal. Similarly, the signal on the second terminal line L2 is lower than the first level signal and higher than the second level signal, that is, the sub-pixel corresponding to the second terminal line L2 will display a gray scale different from the gray scale corresponding to the second level signal. Therefore, signals of different levels can be transmitted to the first detection signal line Te1 and the second detection signal line Te2, and the first detection switch K1 and the second detection switch K2 can be controlled to be turned on, and whether there is a short circuit problem between the terminal lines of different metal layers can be determined through the display screen of the display panel.

[0055] In each odd-numbered column of terminal line pairs, each terminal line is connected to a third detection switch K3, wherein, among the terminal lines connected to the third detection switch K3, different terminal lines are connected to different third detection switches K3. In each even-numbered column of terminal line pairs, each terminal line is connected to a fourth detection switch K4, wherein, among the terminal lines connected to the fourth detection switch K4, different terminal lines are connected to different fourth detection switches K4. All third detection switches K3 are connected to the third detection signal line Te3, and all fourth detection switches K4 are connected to the fourth detection signal line Te4. When it is necessary to detect whether the terminal lines located on the same layer have a short circuit problem, such as Figure 4 As shown, Figure 4 A schematic diagram of a structure in which a terminal line is short-circuited in another display panel provided by an embodiment of the present invention, Figure 4The first terminal line L1 and the third terminal line L3 located in the same layer are short-circuited. If it is necessary to judge this situation, signals with different levels can be transmitted to the third detection signal line Te3 and the fourth detection signal line Te4, such as transmitting a first level signal (such as a high level) to the third detection signal line Te3, and transmitting a second level signal (such as a low level) to the fourth detection signal line Te4. At this time, if the first terminal line L1 and the third terminal line L3 are not short-circuited, the sub-pixel corresponding to the first terminal line L1 should display the grayscale corresponding to the first level signal, and the sub-pixel corresponding to the third terminal line L3 should display the grayscale corresponding to the second level signal. If the first terminal line L1 and the third terminal line L3 are short-circuited, the first terminal line L1 will be electrically connected to the fourth detection signal line Te4, and the signal on the first terminal line L1 will be lower than the first level signal and higher than the second level signal, that is, the sub-pixel corresponding to the first terminal line L1 will display a grayscale different from the grayscale corresponding to the first level signal. Similarly, the signal on the third terminal line L3 is lower than the first level signal and higher than the second level signal, that is, the sub-pixel corresponding to the third terminal line L3 will display a gray scale different from the gray scale corresponding to the second level signal. Therefore, signals of different levels can be transmitted to the third detection signal line Te3 and the fourth detection signal line Te4, and the third detection switch K3 and the fourth detection switch K4 can be controlled to be turned on, and whether there is a short circuit problem of the terminal lines of the same metal layer can be determined through the display screen of the display panel.

[0056] When judging whether the terminal line of the same layer is short-circuited, the first detection switch K1 and the second detection switch K2 can be controlled to be turned off to avoid misjudgment. In addition, the two first detection signal lines and the second detection signal line can be used to detect whether the terminal lines of different layers are short-circuited. During the detection, the signal polarities on the two adjacent terminal lines are different, and the display screen does not flicker.

[0057] The technical solution of this embodiment adopts a display panel including: a plurality of columns of terminal line pairs and a plurality of data lines, each column of terminal line pairs includes two terminal lines extending in the column direction and adjacent to each other; each terminal line is electrically connected to a data line; wherein the terminal lines of the odd columns are in different layers from the terminal lines of the even columns; a plurality of first detection switches and first detection signal lines, wherein the first end of the first detection switch is electrically connected to the first detection signal line, and the second end of the first detection switch is electrically connected to a terminal line of the odd columns; a plurality of second detection switches and second detection signal lines, wherein the first end of the second detection switch is electrically connected to the second detection signal line, and the second end of the second detection switch is electrically connected to a terminal line of the even columns; a plurality of third detection switches and third detection signal lines, wherein the first end of the third detection switch is electrically connected to the third detection signal line, and the second end of the third detection switch is electrically connected to a terminal line of a terminal line pair of an odd column; a plurality of fourth detection switches and fourth detection signal lines, wherein the first end of the fourth detection switch is electrically connected to the fourth detection signal line, and the second end of the fourth detection switch is electrically connected to a terminal line of a terminal line pair of an even column. When it is necessary to determine whether terminal lines of different layers are short-circuited, the first detection switch and the second detection switch are turned on, and signals of different levels are transmitted to the first detection signal line and the second detection signal line, and whether a short circuit exists is determined by displaying a picture. When it is necessary to determine whether terminal lines of the same layer are short-circuited, the third detection switch and the fourth detection switch are turned on, and signals of different levels are transmitted to the third detection signal line and the fourth detection signal line, and whether a short circuit exists is determined by displaying a picture. In summary, the display panel of this embodiment can test whether terminal lines of different layers have short-circuit problems, and can also test whether terminal lines of the same layer have short-circuit problems, and can perform more comprehensive tests on the terminal lines in the display panel.

[0058] Optionally, continue to refer to Figure 1 The display panel includes a display area AA and a non-display area NAA that at least partially surrounds the display area AA; the data line is arranged in the display area AA; the first detection switch K1, the second detection switch K2, the third detection switch K3, the fourth detection switch K4, the first detection signal line Te1, the second detection signal line Te2, the third detection signal line Te3 and the fourth detection signal line Te4 are located in the non-display area NAA.

[0059] Specifically, the display area AA of the display panel is provided with a pixel driving circuit and corresponding sub-pixels, wherein the sub-pixels are, for example, liquid crystals and corresponding color films. The non-display area NAA may completely surround the display area AA. In this embodiment, the first detection switch K1, the second detection switch K2, the third detection switch K3, the fourth detection switch K4, the first detection signal line Te1, the second detection signal line Te2, the third detection signal line Te3 and the fourth detection signal line Te4 are arranged in the non-display area NAA, without occupying the area of ​​the display area AA, which is conducive to reducing the wiring difficulty of the display panel.

[0060] Optionally, continue to refer to Figure 1 The non-display area NAA includes a first non-display area NAA1 and a second non-display area NAA2 located on both sides of the display area AA along the column direction Y; the non-display area NAA also includes a third non-display area NAA3 and a fourth non-display area NAA4 located on both sides of the display area AA along the row direction X. The first detection switch K1, the first detection signal line Te1, the second detection switch K2 and the second detection signal line Te2 are located in one of the above four non-display areas; the third detection switch K3, the third detection signal line Te3, the fourth detection switch K4 and the fourth detection signal line Te4 are located in another one of the above four non-display areas. That is to say, the first detection switch K1, the first detection signal line Te1, the second detection switch K2 and the second detection signal line Te2 are defined as the first detection circuit, and the third detection switch K3, the third detection signal line Te3, the fourth detection switch K4 and the fourth detection signal line Te4 are defined as the second detection circuit. The first detection circuit and the second detection circuit are located in the non-display area on different sides of the display area AA. Compared with when the two are located in the non-display area on the same side of the display area AA, there is no need for complicated cross-over lines between the first detection circuit and the second detection circuit, which is more conducive to the wiring of the display panel.

[0061] Optionally, continue to refer to Figure 1 The first detection switch K1, the second detection switch K2, the first detection signal line Te1 and the second detection signal line Te2 are located in the first non-display area NAA1; the third detection switch K3, the third detection signal line Te3, the fourth detection switch K4 and the fourth detection signal line Te4 are located in the second non-display area NAA2. The second end of the first detection switch K1 is electrically connected to the corresponding terminal line through the data line; the second detection switch K2 is electrically connected to the corresponding terminal line through the data line.

[0062] Specifically, the first non-display area NAA1 can be understood as the upper frame of the display panel, and the second non-display area NAA2 can be understood as the lower frame of the display panel. In this embodiment, since the data line extends in the column direction, the first detection circuit is located in the first non-display area NAA1, and can be electrically connected to the first end of the data line, and then electrically connected to the terminal line; the second detection circuit is located in the second non-display area NAA2, and can be directly electrically connected to the terminal line. In addition, compared with setting the first detection circuit and the second detection circuit in the third non-display area NAA3 and the fourth non-display area NAA4, it is not necessary to electrically connect to the terminal line without a long routing, which can reduce the length of the connecting line between the first detection switch K1 and the terminal line, and reduce the defective rate of the connecting line. Reduce the length of the connecting line between the second detection switch K2 and the terminal line, and reduce the defective rate of the connecting line. Reduce the length of the connecting line between the third detection switch K3 and the terminal line, and reduce the defective rate of the connecting line. Reduce the length of the connecting line between the fourth detection switch K4 and the terminal line, and reduce the defective rate of the connecting line.

[0063] Optionally, continue to refer to Figure 1 The non-display area NAA includes a binding area BA, which is used to bind the driving chip. The third detection switch K3, the third detection signal line Te3, the fourth detection switch K4 and the fourth detection signal line Te4 are located in the binding area BA.

[0064] Specifically, the driver chip bound to the binding area BA is used to drive the display panel for display. The bonding area BA is provided with a pad Pad for binding the driver chip, and the area where the pad Pad is not provided is an idle area, that is, no metal structure is provided. In this embodiment, the idle area in the binding area BA can be used to set the second detection circuit, without increasing the frame of the display panel, which is more conducive to realizing a narrow frame of the display panel.

[0065] like Figure 1 As shown, the binding area BA includes a row of pads Pad closest to the display area AA along the column direction Y (for example, the output connected to the driver chip), and a row of pads Pad farthest from the display area AA (for example, the input connected to the driver chip), and the idle area BF in the binding area BA is located between the above two rows of pads Pad. After the driver chip is bound, the second detection circuit is covered by the driver chip. In addition, since the driver chip is not bound to the display panel during the test, the test of the second detection circuit is not affected. When the driver chip is bound to display, the second detection circuit does not work at this time, so it will not interfere with the operation of the driver chip. Exemplarily, the idle area BF is, for example, a rectangle, and the size of the idle area BF along the row direction is, for example, 5 mm, and the size of the idle area BF along the column direction is, for example, 1 mm.

[0066] Optionally, continue to refer to Figure 1One end of the terminal line is electrically connected to a data line, and the other end of the terminal line extends to the binding area.

[0067] Specifically, in the present embodiment, each data line is connected to the pad Pad in the binding area BA through a corresponding terminal line, and more specifically, it can be connected to a row of pads Pad closest to the display area AA. The driver chip provides a signal to the data line through the terminal line. In the present embodiment, the third detection switch K3 is electrically connected to the data line through the terminal line, and the display panel can also detect whether the terminal line is open. For example, the first detection switch K1 and the first detection signal line Te1 are used to detect whether the first terminal line L1 is open, and the third detection switch K3 and the third detection signal line Te3 are used to detect whether the first terminal line L1 is open; if the first terminal line L1 is not open after detection by the first detection switch K1 and the first detection signal line Te1, and the first terminal line L1 is open after detection by the third detection switch K3 and the third detection signal line Te3, it means that the first terminal line L1 is open. Similarly, the second detection switch K2, the second detection signal line Te2, the third detection switch K3 and the third detection signal line Te3 can be used to detect whether the second terminal line L2 is open. Whether the third terminal line L3 is disconnected can be detected by the first detection switch K1, the first detection signal line Te1, the fourth detection switch K4 and the fourth detection signal line Te4. Whether the fourth terminal line L4 is disconnected can be detected by the second detection switch K2, the second detection signal line Te2, the fourth detection switch K4 and the fourth detection signal line Te4.

[0068] Optionally, continue to refer to Figure 1 The display panel also includes: a first control signal line C1, a control end of the first detection switch K1 and a control end of the second detection switch K2 are electrically connected to the first control signal line C1; a second control signal line C2, a control end of the third detection switch K3 and a control end of the fourth detection switch K4 are electrically connected to the second control signal line C2.

[0069] Specifically, the first detection switch K1 and the second detection switch K2 have the same conduction state, that is, they are turned on and off at the same time. Connecting the control end of the first detection switch K1 and the control end of the second detection switch K2 to the same first control signal line C1 facilitates synchronous control of the first detection switch K1 and the second detection switch K2.

[0070] The third detection switch K3 and the fourth detection switch K4 have the same conduction state, that is, they are turned on and off at the same time. The control end of the third detection switch K3 and the control end of the fourth detection switch K4 are connected to the same second control signal line C2, which facilitates the synchronous control of the third detection switch K3 and the fourth detection switch K4.

[0071] Optionally, Figure 5A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, referring to Figure 5 The first detection switch K1 includes a first transistor T1, a first end of the first transistor T1 serves as a first end of the first detection switch K1, a second end of the first transistor T1 serves as a second end of the first detection switch K1, and a control end of the first transistor T1 serves as a control end of the first detection switch K1.

[0072] The second detection switch K2 includes a second transistor T2, a first end of the second transistor T2 serves as the first end of the second detection switch K2, a second end of the second transistor T2 serves as the second end of the second detection switch K2, and a control end of the second transistor T2 serves as the control end of the second detection switch K2.

[0073] The third detection switch K3 includes a third transistor T3, a first end of the third transistor T3 serves as the first end of the third detection switch K3, a second end of the third transistor T3 serves as the second end of the third detection switch K3, and a control end of the third transistor T3 serves as the control end of the third detection switch K3.

[0074] The fourth detection switch K4 includes a fourth transistor T4, a first end of the fourth transistor T4 serves as the first end of the fourth detection switch K4, a second end of the fourth transistor T4 serves as the second end of the fourth detection switch K4, and a control end of the fourth transistor T4 serves as the control end of the fourth detection switch K4.

[0075] The first transistor T1 to the fourth transistor T4 can be N-type transistors or P-type transistors, preferably P-type transistors. Using transistors to implement the detection switch function requires fewer devices and is compatible with the manufacturing process of the display panel, which is more conducive to reducing the cost of the display panel.

[0076] The present invention also provides a display device, such as Figure 6 As shown, Figure 6 A schematic diagram of the structure of a display device provided in an embodiment of the present invention. The display device includes a display panel provided in any embodiment of the present invention. The display device may be a mobile phone, a tablet computer, a car display, a smart watch, an MP3, an MP4, a videophone, a smart helmet or other wearable device. Since the display device provided in an embodiment of the present invention includes a display panel provided in any embodiment of the present invention, it also has the same beneficial effects, which will not be described in detail here.

[0077] The present invention also provides a method for detecting a display panel, such as Figure 7 As shown, Figure 7 A flow chart of a display panel detection method provided by an embodiment of the present invention. The display panel detection method is used to detect the display panel provided by any embodiment of the present invention, and the detection method includes:

[0078] Step S110, in the first detection stage, controlling the first detection switch and the second detection switch to be turned on; and inputting a first level signal to one of the first detection signal line and the second detection signal line and a second level signal to the other in the same frame; determining whether the terminal line of the display panel is abnormal according to the display screen of the display panel;

[0079] Step S120, in the second detection stage, control the third detection switch and the fourth detection switch to be turned on; and input a first level signal to one of the third detection signal line and the fourth detection signal line and a second level signal to the other in the same frame; determine whether the terminal line of the display panel is abnormal based on the display screen of the display panel.

[0080] Specifically, the first detection stage is used to detect whether the terminal lines of different layers in the display panel are short-circuited. The second detection stage is used to detect whether the terminal lines of the same layer in the display panel are short-circuited. The order of the first detection stage and the second detection stage is not limited. The specific detection process of the first detection stage and the second detection stage and the method for determining whether the terminal line is abnormal can refer to the description of the display panel part of the present invention, which will not be repeated here.

[0081] The technical solution of this embodiment adopts a display panel detection method that can detect whether the terminal lines of different layers are abnormal, and can also detect whether the terminal lines of the same layer are abnormal.

[0082] Optionally, the display panel detection method further includes:

[0083] In two adjacent frames of the first detection phase, one of the frames inputs a first level signal to the first detection signal line and a second level signal to the second detection signal line; the other frame inputs a second level signal to the first detection signal line and a first level signal to the second detection signal line. In this way, the liquid crystal molecules in the sub-pixels (such as sub-pixels containing liquid crystal molecules) corresponding to the corresponding terminal lines can be in different deflection states in different frames, preventing the liquid crystal molecules from being in one state for a long time and shortening the service life of the liquid crystal.

[0084] In two adjacent frames of the second detection phase, one of the frames inputs a first level signal to the third detection signal line and a second level signal to the fourth detection signal line; the other frame inputs a second level signal to the third detection signal line and a first level signal to the fourth detection signal line. In this way, the liquid crystal molecules in the sub-pixels (such as sub-pixels containing liquid crystal molecules) corresponding to the corresponding terminal lines can be in different deflection states in different frames, preventing the liquid crystal molecules from being in one state for a long time and shortening the service life of the liquid crystal.

[0085] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0086] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: The display panel comprises: A plurality of columns of terminal line pairs and a plurality of data lines, wherein each column of the terminal line pairs comprises two terminal lines extending in a column direction and adjacent to each other; each of the terminal lines is electrically connected to one of the data lines; wherein the terminal lines in the odd columns are in different layers from the terminal lines in the even columns; A plurality of first detection switches and first detection signal lines, wherein a first end of the first detection switch is electrically connected to the first detection signal line, and a second end of the first detection switch is electrically connected to the terminal line of an odd-numbered column; A plurality of second detection switches and second detection signal lines, wherein a first end of the second detection switch is electrically connected to the second detection signal line, and a second end of the second detection switch is electrically connected to the terminal line of an even-numbered column; A plurality of third detection switches and third detection signal lines, wherein a first end of the third detection switch is electrically connected to the third detection signal line, and a second end of the third detection switch is electrically connected to one of the terminal lines in an odd-numbered column of the terminal line pair; A plurality of fourth detection switches and fourth detection signal lines, wherein a first end of the fourth detection switch is electrically connected to the fourth detection signal line, and a second end of the fourth detection switch is electrically connected to one of the terminal lines in an even-numbered column.

2. The display panel according to claim 1, characterized in that: The display panel comprises a display area and a non-display area at least partially surrounding the display area; The data line is arranged in the display area; the first detection switch, the second detection switch, the third detection switch, the fourth detection switch, the first detection signal line, the second detection signal line, the third detection signal line and the fourth detection signal line are located in the non-display area.

3. The display panel according to claim 2, characterized in that: The non-display area includes a first non-display area and a second non-display area located at both sides of the display area along a column direction; The first detection switch, the first detection signal line, the second detection switch and the second detection signal line are located in the first non-display area; The second end of the first detection switch is electrically connected to the corresponding terminal line through the data line; the second end of the second detection switch is electrically connected to the corresponding terminal line through the data line; The third detection switch, the third detection signal line, the fourth detection switch and the fourth detection signal line are located in the second non-display area.

4. The display panel according to claim 1, characterized in that: The display panel comprises a display area and a non-display area at least partially surrounding the display area; the non-display area comprises a binding area, and the binding area is used to bind the driving chip; The third detection switch, the third detection signal line, the fourth detection switch, and the fourth detection signal line are located in the binding area.

5. The display panel according to claim 4, characterized in that: One end of the terminal line is electrically connected to one of the data lines, and the other end of the terminal line extends to the binding area.

6. The display panel according to claim 1, characterized in that: The display panel further includes: A first control signal line, a control end of the first detection switch and a control end of the second detection switch are electrically connected to the first control signal line; A second control signal line, a control end of the third detection switch and a control end of the fourth detection switch are electrically connected to the second control signal line.

7. The display panel according to claim 1, characterized in that: The first detection switch includes a first transistor, a first end of the first transistor serves as the first end of the first detection switch, and a second end of the first transistor serves as the second end of the first detection switch; The second detection switch includes a second transistor, a first end of the second transistor serves as the first end of the second detection switch, and a second end of the second transistor serves as the second end of the second detection switch; The third detection switch comprises a third transistor, a first end of the third transistor serves as the first end of the third detection switch, and a second end of the third transistor serves as the second end of the third detection switch; The fourth detection switch includes a fourth transistor, a first end of the fourth transistor serves as the first end of the fourth detection switch, and a second end of the fourth transistor serves as the second end of the fourth detection switch.

8. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 7.

9. A method for detecting a display panel, used for detecting the display panel according to any one of claims 1 to 7, characterized in that: The display panel detection method includes: In the first detection stage, the first detection switch and the second detection switch are controlled to be turned on; and a first level signal is input to one of the first detection signal line and the second detection signal line and a second level signal is input to the other in the same frame; and whether the terminal line of the display panel is abnormal is determined according to the display screen of the display panel; In the second detection stage, the third detection switch and the fourth detection switch are controlled to be turned on; and in the same frame, a first level signal is input to one of the third detection signal line and the fourth detection signal line, and a second level signal is input to the other; and whether the terminal line of the display panel is abnormal is determined based on the display screen of the display panel.

10. The display panel detection method according to claim 9, characterized in that: The detection method further comprises: In two adjacent frames of the first detection phase, one of the frames inputs a first level signal to the first detection signal line and a second level signal to the second detection signal line; the other frame inputs a second level signal to the first detection signal line and a first level signal to the second detection signal line; In two adjacent frames of the second detection stage, one frame inputs a first level signal to the third detection signal line and a second level signal to the fourth detection signal line; the other frame inputs a second level signal to the third detection signal line and a first level signal to the fourth detection signal line.

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