Display panel and its testing method, display device

Abstract

This invention discloses a display panel and its detection method and display device. The display panel includes: multiple rows of terminal wire pairs and multiple data lines; multiple 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 is electrically connected to a terminal wire; multiple 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 is electrically connected to a terminal wire; multiple 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 is electrically connected to a terminal wire in an odd-numbered row of terminal wire pairs; and multiple 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 is electrically connected to a terminal wire in an even-numbered row of terminal wire pairs. This invention can improve the comprehensiveness of the detection of terminal wires in the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, its testing method, and a display device. Background Technology

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

[0003] Before leaving the factory, display panels need to undergo image quality and anomaly testing, also known as Cell Testing. Currently, methods for testing display panels include the LCD Quicker method, which connects even-numbered column terminal lines to the same test signal line and odd-numbered column terminal lines to the same test signal line. This method can detect short circuits between odd-numbered and even-numbered column terminal lines; however, it cannot detect short circuits between odd-numbered column terminal lines or between even-numbered column terminal lines. In other words, the current display panel testing methods suffer from insufficient comprehensiveness in detecting the terminal lines. Summary of the Invention

[0004] This invention provides a display panel and its detection method and display device to improve the comprehensiveness of the detection of terminal lines in the display panel.

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

[0006] Multiple rows of terminal wire pairs and multiple data lines, each row of terminal wire pairs includes two adjacent terminal wires extending along the column direction; each terminal wire is electrically connected to a data line; wherein the terminal wires in odd-numbered columns are on different layers from the terminal wires in even-numbered columns;

[0007] Multiple 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 a terminal line of an odd number of columns;

[0008] Multiple 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 in an even-numbered column;

[0009] Multiple 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 one of the terminal lines in an odd-numbered sequence of terminal line pairs;

[0010] Multiple fourth detection switches and fourth detection signal lines are provided, 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 one of the terminal lines in an even-numbered column of terminal line pairs.

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

[0012] The data line is located 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 on both sides of the display area along the 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 via the data line; the second end of the second detection switch is electrically connected to the corresponding terminal line via 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 that at least partially surrounds the display area; the non-display area includes a bonding area for bonding a driver 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 a terminal wire, and the other end of the terminal wire extends to the bonding area.

[0020] Optionally, the display panel further includes:

[0021] The first control signal line, the control terminal of the first detection switch and the control terminal of the second detection switch are electrically connected to the first control signal line;

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

[0023] Optionally, the first detection switch includes a first transistor, with a first terminal of the first transistor serving as a first terminal of the first detection switch and a second terminal of the first transistor serving as a second terminal of the first detection switch.

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

[0025] The third detection switch includes a third transistor, wherein the first terminal of the third transistor serves as the first terminal of the third detection switch, and the second terminal of the third transistor serves as the second terminal of the third detection switch;

[0026] The fourth detection switch includes a fourth transistor, with the first terminal of the fourth transistor serving as the first terminal of the fourth detection switch and the second terminal of the fourth transistor serving as the second terminal of the fourth detection switch.

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

[0028] According to another aspect of the present invention, a method for detecting a display panel is provided, for detecting a display panel as described above, the method comprising:

[0029] In the first detection phase, the first detection switch and the second detection switch are turned on; and within the same frame, 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; and the abnormality of the terminal line of the display panel is determined according to the display screen of the display panel.

[0030] In the second detection phase, the third and fourth detection switches are turned on; and within the same frame, a first level signal is input to one of the third and fourth detection signal lines, and a second level signal is input to the other; the terminal lines of the display panel are determined to be abnormal based on the display screen.

[0031] Optionally, the detection method further includes:

[0032] In two adjacent frames during the first detection phase, in one frame a first-level signal is input to the first detection signal line and a second-level signal is input to the second detection signal line; in the other frame a second-level signal is input to the first detection signal line and a first-level signal is input to the second detection signal line.

[0033] In two adjacent frames during the second detection phase, 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 this invention uses a display panel comprising: multiple columns of terminal wire pairs and multiple data lines, each column of terminal wire pairs including two adjacent terminal wires extending along the column direction; each terminal wire being electrically connected to a data line; wherein, the terminal wires in odd-numbered columns are on different layers from those in even-numbered columns; multiple first detection switches and first detection signal lines, the first end of the first detection switch being electrically connected to the first detection signal line, and the second end of the first detection switch being electrically connected to a terminal wire in an odd-numbered column; multiple second detection switches and second detection signal lines, the first end of the second detection switch being electrically connected to the second detection signal line, and the second end of the second detection switch being electrically connected to a terminal wire in an even-numbered column; multiple third detection switches and third detection signal lines, the first end of the third detection switch being electrically connected to the third detection signal line, and the second end of the third detection switch being electrically connected to a terminal wire in an odd-numbered column of terminal wire pairs; and multiple fourth detection switches and fourth detection signal lines, the first end of the fourth detection switch being electrically connected to the fourth detection signal line, and the second end of the fourth detection switch being electrically connected to a terminal wire in an even-numbered column of terminal wire pairs. When it is necessary to determine whether terminal wires on different layers are short-circuited, the first and second detection switches are turned on, and signals of different levels are transmitted to the first and second detection signal lines. The presence of a short circuit is then determined by displaying the screen. When it is necessary to determine whether terminal wires on the same layer are short-circuited, the third and fourth detection switches are turned on, and signals of different levels are transmitted to the third and fourth detection signal lines. The presence of a short circuit is then determined by displaying the screen. In summary, the display panel of this embodiment can test for short circuits in terminal wires on both different layers and the same layer, enabling a more comprehensive test of the terminal wires in the display panel.

[0035] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

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

[0039] Figure 3 This is a schematic diagram of a terminal wire short circuit in a display panel provided by an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of a terminal wire short circuit in another display panel provided by an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention;

[0043] Figure 7 This is a flowchart of a method for detecting a display panel provided in an embodiment of the present invention. Detailed Implementation

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, with reference to... Figure 1 The display panel includes:

[0047] Multiple rows of terminal wire pairs and multiple data lines, each row of terminal wire pairs includes two adjacent terminal wires extending along the column direction Y; each terminal wire is electrically connected to a data line; wherein, the terminal wires in odd-numbered columns are on different layers from the terminal wires in even-numbered columns;

[0048] Multiple first detection switches K1 and first detection signal lines Te1 are provided. The first end of the first detection switch K1 is electrically connected to the first detection signal line Te1, and the second end of the first detection switch K1 is electrically connected to a terminal line of an odd number of columns.

[0049] Multiple second detection switches K2 and a second detection signal line Te2 are provided. The first end of the second detection switch K2 is electrically connected to the second detection signal line Te2, and the second end of the second detection switch K2 is electrically connected to a terminal line in an even-numbered column.

[0050] Multiple third detection switches K3 and third detection signal lines Te3, the first end of the third detection switch K3 is electrically connected to the third detection signal line Te3, and the second end of the third detection switch K3 is electrically connected to one of the terminal lines in an odd-numbered column of terminal lines;

[0051] Multiple fourth detection switches K4 and fourth detection signal lines Te4 are provided. The first end of the fourth detection switch K4 is electrically connected to the fourth detection signal line Te4, and the second end of the fourth detection switch K4 is electrically connected to one of the terminal lines in an even-numbered column of terminal lines.

[0052] Specifically, the display panel includes multiple data lines extending along the column direction (Y) and arranged along the row direction (X). These data lines provide data voltage to the pixel driving circuitry in the display panel, which in turn drives the corresponding sub-pixels to emit corresponding grayscale levels based on the data voltage. The specific circuit structure and working principle of the pixel driving circuitry are well-known to those skilled in the art and will not be described in detail here. The display panel also includes multiple terminal lines, which can also be understood as signal leads, used to achieve electrical connection between the driver chip and the data lines. That is, the data signals transmitted in the driver chip are written into the corresponding data lines through the terminal lines. Figure 1As shown in the illustration, this embodiment exemplarily shows the first data line S1, the second data line S2, ... the eleventh data line S11, and the twelfth data line S12. The first terminal line L1, the second terminal line L2, ... the eleventh terminal line L11, and the twelfth terminal line L12 are also illustrated. The terminal lines are divided into odd-numbered columns and even-numbered columns. The odd-numbered 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 even-numbered 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 this embodiment, the terminal lines in odd-numbered columns can be understood as terminal lines electrically connected to the data lines in odd-numbered columns; correspondingly, the terminal lines in even-numbered columns can be understood as terminal lines electrically connected to the data lines in even-numbered columns. Two adjacent terminal lines can 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 can coincide or be staggered. It should be noted that the terminal line does not have to be a straight line parallel to the column direction; the terminal line can be a straight line with a certain angle to the column direction, or the terminal line can be a broken line, as long as the extension direction of the terminal line is in the column direction. The terminal lines in odd-numbered columns and even-numbered columns are located in different film layers, such as... Figure 2 As shown, Figure 2 This is 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 a transistor in a 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 odd-numbered and even-numbered terminal lines 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, terminal lines can also be set in more metal layers, such as distributing terminal lines in three metal layers, with the same terminal line located in one metal layer. In some other embodiments, different parts of the same terminal line can be located in different metal layers. Since there is a lot of wiring in the area used to set 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 more compact, they are more prone to short circuits compared to data lines.

[0053] Furthermore, the multiple terminal lines in the display panel are divided into multiple rows of terminal line pairs. Each row of terminal line pairs includes two adjacent terminal lines. That is, each row of terminal line pairs includes one odd-numbered row of terminal lines and one even-numbered row of terminal lines. The two terminal lines in each row of terminal line pairs are located in different layers. For example, the first row of terminal line pairs includes a first terminal line L1 and a second terminal line L2; the second row of terminal line pairs includes a third terminal line L3 and a fourth terminal line L4; the third row of terminal line pairs includes a fifth terminal line L5 and a sixth terminal line L6; the fourth row of terminal line pairs includes a seventh terminal line L7 and an eighth terminal line L8; the fifth row of terminal line pairs includes a ninth terminal line L9 and a tenth terminal line L10; and the sixth row of terminal line pairs includes an eleventh terminal line L11 and a twelfth terminal line L12.

[0054] Each odd-numbered column of terminal wires is connected to a corresponding first detection switch K1, and different odd-numbered columns are connected to different first detection switches K1. Each even-numbered column of terminal wires is connected to a corresponding second detection switch K2, and different even-numbered columns are connected to different second detection switches K2. That is, all odd-numbered columns of terminal wires are connected to the same first detection signal line Te1 through their corresponding first detection switches K1, and all even-numbered columns of terminal wires are connected to the same second detection signal line Te2 through their corresponding second detection switches K2. When it is necessary to detect whether the terminal wires of different layers of the display panel are short-circuited, signals of different high and low 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 This is a schematic diagram of a terminal wire short circuit in a display panel provided by an embodiment of the present invention. Figure 3In the diagram, the first terminal line L1 and the second terminal line L2 are short-circuited (represented by black blocks indicating a short circuit). A first-level signal (e.g., high level) is transmitted to the first detection signal line Te1, and a second-level signal (e.g., low level) is transmitted to the second detection signal line Te2, controlling all first detection switches K1 and all second detection switches K2 to be 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. However, 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. The signal on the first terminal line L1 will be lower than the first-level signal and higher than the second-level signal, meaning 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 but higher than the second level signal. This means the sub-pixel corresponding to the second terminal line L2 will display a different grayscale level than the grayscale level 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 turned on. The presence of a short circuit between terminal lines of different metal layers can then be determined by observing the display screen.

[0055] In each odd-numbered column of terminal pairs, each terminal wire is connected to a third detection switch K3, wherein different terminal wires connected to different third detection switches K3 are connected to different third detection switches K3. In each even-numbered column of terminal pairs, each terminal wire is connected to a fourth detection switch K4, wherein different terminal wires connected to different fourth detection switches K4 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 there is a short circuit problem in terminal wires located on the same layer, such as... Figure 4 As shown, Figure 4 This is a schematic diagram of a terminal wire short circuit 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 on the same layer, are short-circuited. To determine this situation, signals with different levels can be transmitted to the third detection signal line Te3 and the fourth detection signal line Te4. For example, a first-level signal (e.g., high level) can be transmitted to the third detection signal line Te3, and a second-level signal (e.g., low level) can be transmitted to the fourth detection signal line Te4. In this case, 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. The signal on the first terminal line L1 will be lower than the first-level signal and higher than the second-level signal, meaning that 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 but higher than the second level signal. This means the sub-pixel corresponding to the third terminal line L3 will display a different grayscale level than the one 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 turned on. The presence of a short circuit in the terminal lines of the same metal layer can then be determined by observing the display screen.

[0056] When determining whether a terminal wire on the same layer is short-circuited, the first detection switch K1 and the second detection switch K2 can be turned off to avoid false alarms. Furthermore, two first and second detection signal lines can be used to detect whether terminal wires on different layers are short-circuited. During detection, the signal polarities on adjacent terminal wires are different, and the display screen does not flicker.

[0057] The technical solution of this embodiment uses a display panel comprising: multiple columns of terminal wire pairs and multiple data lines, each column of terminal wire pairs including two adjacent terminal wires extending along the column direction; each terminal wire is electrically connected to a data line; wherein, the terminal wires of odd-numbered columns are on different layers from the terminal wires of even-numbered columns; multiple first detection switches and first detection signal lines, the first end of the first detection switch being electrically connected to the first detection signal line, and the second end of the first detection switch being electrically connected to a terminal wire of an odd-numbered column; multiple second detection switches and second detection signal lines, the first end of the second detection switch being electrically connected to the second detection signal line, and the second end of the second detection switch being electrically connected to a terminal wire of an even-numbered column; multiple third detection switches and third detection signal lines, the first end of the third detection switch being electrically connected to the third detection signal line, and the second end of the third detection switch being electrically connected to a terminal wire in an odd-numbered column of terminal wire pairs; and multiple fourth detection switches and fourth detection signal lines, the first end of the fourth detection switch being electrically connected to the fourth detection signal line, and the second end of the fourth detection switch being electrically connected to a terminal wire in an even-numbered column of terminal wire pairs. When it is necessary to determine whether terminal wires on different layers are short-circuited, the first and second detection switches are turned on, and signals of different levels are transmitted to the first and second detection signal lines. The presence of a short circuit is then determined by displaying the screen. When it is necessary to determine whether terminal wires on the same layer are short-circuited, the third and fourth detection switches are turned on, and signals of different levels are transmitted to the third and fourth detection signal lines. The presence of a short circuit is then determined by displaying the screen. In summary, the display panel of this embodiment can test for short circuits in terminal wires on both different layers and the same layer, enabling a more comprehensive test of the terminal wires 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; data lines are disposed in the display area AA; a first detection switch K1, a second detection switch K2, a third detection switch K3, a fourth detection switch K4, a first detection signal line Te1, a second detection signal line Te2, a third detection signal line Te3, and a 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 pixel driving circuits and corresponding sub-pixels, wherein the sub-pixels are, for example, liquid crystals and corresponding color filters. The non-display area NAA can 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 disposed in the non-display area NAA, which does not require occupying the area of ​​the display area AA, and helps to reduce 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 the other one of the above four non-display areas. In other words, if 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, then 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 the two being located in the non-display area on the same side of the display area AA, the first detection circuit and the second detection circuit do not require complex cross-wires, which is more conducive to the wiring of the display panel.

[0061] Further, optional, 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 terminal of the first detection switch K1 is electrically connected to the corresponding terminal line via a data line; the second detection switch K2 is electrically connected to the corresponding terminal line via a data line.

[0062] Specifically, the first non-display area NAA1 can be understood as the upper bezel of the display panel, and the second non-display area NAA2 can be understood as the lower bezel of the display panel. In this embodiment, since the data line extends along 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. Furthermore, compared to placing the first and second detection circuits in the third and fourth non-display areas NAA3 and NAA4, a longer trace is not required to electrically connect to the terminal line, reducing the length of the connection line between the first detection switch K1 and the terminal line, and lowering the failure rate of this connection line. Similarly, reducing the length of the connection line between the second detection switch K2 and the terminal line also lowers the failure rate. Finally, reducing the length of the connection line between the third detection switch K3 and the terminal line further lowers the failure rate. Finally, reducing the length of the connection line between the fourth detection switch K4 and the terminal line also lowers the failure rate.

[0063] Optionally, continue to refer to Figure 1 The non-display area NAA includes the bonding area BA, which is used to bond the driver 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 bonding area BA.

[0064] Specifically, the driver chip bonded to the bonding area BA is used to drive the display panel for display. The bonding area BA has pads for bonding the driver chip, while the areas without pads are unused areas, i.e., without metal structures. In this embodiment, the unused areas in the bonding area BA can be used to house the second detection circuit, eliminating the need to add a bezel to the display panel and making it easier to achieve a narrow bezel.

[0065] like Figure 1 As shown, the bonding area BA includes a row of pads closest to the display area AA along the column direction Y (e.g., the output connected to the driver chip) and a row of pads furthest from the display area AA (e.g., the input connected to the driver chip). The free area BF in the bonding area BA is located between these two rows of pads. When the driver chip is bonded, the second detection circuit is covered by the driver chip. Furthermore, since the driver chip is not bonded to the display panel during testing, it does not affect the testing of the second detection circuit. When the driver chip is bonded and the display is active, the second detection circuit is not working, and therefore does not interfere with the operation of the driver chip. For example, the free area BF is rectangular, with a row-direction dimension of 5 mm and a column-direction dimension of 1 mm.

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

[0067] Specifically, in this embodiment, each data line is connected to a pad in the bonding area BA via a corresponding terminal line, more specifically, to the row of pads closest to the display area AA. The driver chip provides signals to the data lines via the terminal lines. In this embodiment, the third detection switch K3 is electrically connected to the data line via a 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, but is open after detection by the third detection switch K3 and the third detection signal line Te3, then it indicates that the first terminal line L1 is open. Similarly, the second terminal line L2 can be detected as open via the second detection switch K2, the second detection signal line Te2, the third detection switch K3, and the third detection signal line Te3. The open circuit status of the third terminal line L3 can be detected using the first detection switch K1, the first detection signal line Te1, the fourth detection switch K4, and the fourth detection signal line Te4. The open circuit status of the fourth terminal line L4 can be detected using 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, the control terminal of the first detection switch K1 and the control terminal of the second detection switch K2 are electrically connected to the first control signal line C1; a second control signal line C2, the control terminal of the third detection switch K3 and the control terminal 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 are in the same on state, that is, they are simultaneously on and simultaneously off. Connecting the control terminals of the first detection switch K1 and the second detection switch K2 to the same first control signal line C1 facilitates the 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 are in the same on state, that is, they are simultaneously on and simultaneously off. Connecting the control terminals of the third detection switch K3 and the fourth detection switch K4 to the same second control signal line C2 facilitates the synchronous control of the third detection switch K3 and the fourth detection switch K4.

[0071] Optionally, Figure 5This is a schematic diagram of another display panel provided in an embodiment of the present invention, with reference to... Figure 5 The first detection switch K1 includes a first transistor T1, the first terminal of the first transistor T1 serves as the first terminal of the first detection switch K1, the second terminal of the first transistor T1 serves as the second terminal of the first detection switch K1, and the control terminal of the first transistor T1 serves as the control terminal of the first detection switch K1.

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

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

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

[0075] The first transistor T1 to the fourth transistor T4 can be either N-type or P-type transistors, preferably P-type transistors. Using transistors to implement the detection switch function requires fewer components, is compatible with the manufacturing process of the display panel, and 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 This is a schematic diagram of a display device provided in an embodiment of the present invention. The display device includes the display panel provided in any embodiment of the present invention. The display device can be a mobile phone, tablet computer, in-vehicle display, smartwatch, MP3 player, MP4 player, video phone, smart helmet, or other wearable device, etc. Since the display device provided in the embodiment of the present invention includes the display panel provided in any embodiment of the present invention, it also has the same beneficial effects, which will not be described again here.

[0077] The present invention also provides a method for detecting a display panel, such as... Figure 7 As shown, Figure 7 This is a flowchart illustrating a method for detecting a display panel according to an embodiment of the present invention. The method is used to detect the display panel provided in any embodiment of the present invention, and includes:

[0078] Step S110: In the first detection stage, control the first detection switch and the second detection switch to be turned on; and input 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 within the same frame; determine whether the terminal line of the display panel is abnormal based on the display screen of the display panel;

[0079] In step S120, during the second detection phase, the third and fourth detection switches are turned on; and within the same frame, a first-level signal is input to one of the third and fourth detection signal lines, and a second-level signal is input to the other; the terminal lines of the display panel are determined to be abnormal based on the display screen.

[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 and second detection stages is not limited. For the specific detection process of the first and second detection stages and the method for determining whether the terminal lines are abnormal, please refer to the description of the display panel part of this invention, which will not be repeated here.

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

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

[0083] In two adjacent frames during the first detection phase, in one frame, a first-level signal is input to the first detection signal line and a second-level signal is input to the second detection signal line; in the other frame, a second-level signal is input to the first detection signal line and a first-level signal is input to the second detection signal line. This configuration ensures that the liquid crystal molecules in the corresponding sub-pixels (such as sub-pixels containing liquid crystal molecules) are in different deflection states in different frames, preventing the liquid crystal molecules from remaining in one state for extended periods and thus shortening the liquid crystal's lifespan.

[0084] In two adjacent frames during the second detection phase, in one frame, a first-level signal is input to the third detection signal line and a second-level signal is input to the fourth detection signal line; in the other frame, a second-level signal is input to the third detection signal line and a first-level signal is input to the fourth detection signal line. This configuration ensures that the liquid crystal molecules in the corresponding sub-pixels (such as sub-pixels containing liquid crystal molecules) are in different deflection states in different frames, preventing the liquid crystal molecules from remaining in one state for extended periods and thus shortening the liquid crystal's lifespan.

[0085] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0086] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized by, The display panel comprises: a plurality of terminal line pairs and a plurality of data lines, each column of the terminal line pairs comprising two adjacent terminal lines extending in a column direction; each terminal line is electrically connected to a data line; wherein the odd-numbered column terminal lines are different from the even-numbered column terminal lines in layer; a plurality of first detection switches and a first detection signal line, a first end of the first detection switch being electrically connected to the first detection signal line, and a second end of the first detection switch being electrically connected to an odd-numbered column terminal line; a plurality of second detection switches and a second detection signal line, a first end of the second detection switch being electrically connected to the second detection signal line, and a second end of the second detection switch being electrically connected to an even-numbered column terminal line; a plurality of third detection switches and a third detection signal line, a first end of the third detection switch being electrically connected to the third detection signal line, and a second end of the third detection switch being electrically connected to a terminal line of an odd-numbered column terminal line pair; a plurality of fourth detection switches and a fourth detection signal line, a first end of the fourth detection switch being electrically connected to the fourth detection signal line, and a second end of the fourth detection switch being electrically connected to a terminal line of an even-numbered column terminal line pair; in a first detection stage, whether the terminal lines in different layers of the display panel are short-circuited is detected; the first detection switch and the second detection switch are controlled to be turned on at the same time; in two adjacent frames of the first detection stage, one frame 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 a second detection stage, whether the terminal lines in the same layer of the display panel are short-circuited is detected; the first detection switch and the second detection switch are controlled to be turned off, and the third detection switch and the fourth detection switch are controlled to be turned on at the same time; 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.

2. The display panel of claim 1, wherein, The display panel comprises a display area and a non-display area surrounding the display area at least in part; the data lines are 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 of claim 2, wherein, The non-display area comprises a first non-display area and a second non-display area located on both sides of the display area in the 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 of claim 1, wherein, The display panel comprises a display area and a non-display area surrounding the display area at least in part; the non-display area comprises a binding area for binding a 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 of claim 4, wherein, One end of the terminal line is electrically connected with one of the data lines, and the other end of the terminal line extends to the binding area.

6. The display panel of claim 1, wherein, The display panel further comprises: A first control signal line, the control end of the first detection switch and the control end of the second detection switch are electrically connected with the first control signal line; A second control signal line, the control end of the third detection switch and the control end of the fourth detection switch are electrically connected with the second control signal line.

7. The display panel of claim 1, wherein, The first detection switch comprises a first transistor, the first end of the first transistor serves as the first end of the first detection switch, and the second end of the first transistor serves as the second end of the first detection switch; The second detection switch comprises a second transistor, the first end of the second transistor serves as the first end of the second detection switch, and the second end of the second transistor serves as the second end of the second detection switch; The third detection switch comprises a third transistor, the first end of the third transistor serves as the first end of the third detection switch, and the second end of the third transistor serves as the second end of the third detection switch; The fourth detection switch comprises a fourth transistor, the first end of the fourth transistor serves as the first end of the fourth detection switch, and the second end of the fourth transistor serves as the second end of the fourth detection switch.

8. A display device, characterized by comprising: The display device comprises the display panel of any one of claims 1-7.

9. A method for detecting a display panel as claimed in any one of the claims 1-7, characterized in that The detection method of the display panel comprises: In a first detection stage, whether the terminal lines of different layers in the display panel are short-circuited is detected; the first detection switch and the second detection switch are controlled to be turned on simultaneously; 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 one in the same frame; whether the terminal lines of the display panel are abnormal is determined according to the display picture of the display panel; In a second detection stage, whether the terminal lines of the same layer in the display panel are short-circuited is detected; the first detection switch and the second detection switch are controlled to be turned off, the third detection switch and the fourth detection switch are controlled to be turned on simultaneously; 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 one in the same frame; whether the terminal lines of the display panel are abnormal is determined according to the display picture of the display panel; The detection method further comprises: In the adjacent two frames in the first detection stage, one frame 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 the adjacent two frames in 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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