Display device and detection method of display device

Abstract

The present invention discloses a display device and a detection method for the display device. The display device includes a display panel and a flexible circuit board bound to the display panel; the display panel includes at least one first binding area for binding the flexible circuit board; the first binding area includes a plurality of first pads; the flexible circuit board includes a plurality of connection terminals, and the connection terminals are bound and connected to the first pads; the flexible circuit board also includes a test area electrically connected to the connection terminal, and the test area includes a plurality of test terminals; the test terminal is used to test the binding impedance between the first pad and the connection terminal; the plurality of connection terminals include a first connection terminal and a second connection terminal, the first connection terminal is electrically connected to at least two test terminals, the second connection terminal is electrically connected to at least one test terminal, and the first pad bound and connected to the first connection terminal is electrically connected to the first pad bound and connected to the second connection terminal. The technical solution provided by the embodiment of the present invention improves the detection accuracy of the binding impedance on the display panel and improves the display effect of the display device.

Description

Technical Field

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

[0002] With the development of display technology, people's requirements for display technology are getting higher and higher. The modular structure of the display panel is becoming more and more complex, and each modular structure needs to be connected by binding. Too large binding impedance will affect the display effect of the display panel. Therefore, it is necessary to detect the binding impedance of the display panel. The existing detection method of the binding impedance of the display panel has the problem of low detection accuracy, which affects the display effect of the display device. Summary of the invention

[0003] The present invention provides a display device and a detection method for the display device, so as to solve the problem that the detection method for the binding impedance of the display panel has low detection accuracy and affects the display effect of the display device.

[0004] According to one aspect of the present invention, there is provided a display device, the display device comprising:

[0005] A display panel and a flexible circuit board bound to the display panel;

[0006] The display panel includes at least one first binding area for binding the flexible circuit board; the first binding area includes a plurality of first pads;

[0007] The flexible circuit board includes a plurality of connection ends, and the connection ends are bound and connected to the first pad;

[0008] The flexible circuit board also includes a test area, the test area includes a plurality of test terminals; the test terminals are electrically connected to the connection terminals, and the test terminals are used to test the binding impedance between the first pad and the connection terminals;

[0009] Among them, the multiple connection terminals include a first connection terminal and a second connection terminal, a first connection terminal is electrically connected to at least two test terminals, a second connection terminal is electrically connected to at least one test terminal, and a first solder pad bound to the first connection terminal is electrically connected to a first solder pad bound to the second connection terminal.

[0010] Optionally, at least two test terminals connected to the same first connection terminal and the first connection terminal form a first test loop;

[0011] The first pad includes a first sub-pad and a second sub-pad, the first sub-pad is bound and connected to the first connection end, the second sub-pad is bound and connected to the second connection end, and the first sub-pad and the second sub-pad are electrically connected;

[0012] The test end connected to the first connection end, the first connection end, the first sub-pad, the second sub-pad, the second connection end, and the test end connected to the second connection end form a second test loop;

[0013] Optionally, the test end is specifically used to test a second test impedance of the second test loop and a first test impedance of the first test loop, and the second test impedance and the first test impedance are used to determine a binding impedance between the first pad and the connection end.

[0014] Optionally, the test area also includes:

[0015] A first connecting line, the first connecting line is connected between the test end and the connecting end;

[0016] At least two test terminals connected to the same connection terminal are respectively connected in parallel to the connection terminal through corresponding first connection lines.

[0017] Optionally, the display device further includes:

[0018] A driver chip bound to the display panel;

[0019] The display panel further includes: at least one second binding area for binding the driving chip;

[0020] The second binding area includes a second pad, and the driving chip includes a plurality of pins; the pins are bound and connected to the second pad;

[0021] At least two pins connected to the second pad are electrically connected to each other;

[0022] The second pad is electrically connected to the first pad, wherein the second pad includes a first sub-pad, and one first sub-pad is connected to at least two first pads;

[0023] The test terminal is also used to test the bonding impedance between the second pad and the pin.

[0024] Optionally, the display panel also includes:

[0025] A second connecting line, the second connecting line is connected between the second pad and the first pad;

[0026] At least two first pads connected to the same second pad are respectively connected in parallel to an end of the second pad away from the driving chip through corresponding second connection lines.

[0027] Optionally, at least two of the first pads connected to the same second pad and the test ends electrically connected to the first pads respectively form a third test loop;

[0028] The second pad further includes a second sub-pad, and one of the second sub-pads is connected to at least one of the first pads;

[0029] The first pad connected to the first sub-pad and the test end connected to the first pad, the first pad connected to the second sub-pad and the test end connected to the first pad, the first sub-pad and the second sub-pad form a fourth test loop;

[0030] Optionally, the test end is further used to test the binding impedance between the second pad and the pin by testing a fourth test impedance of the fourth test loop and a third test impedance of the third test loop.

[0031] Optionally, the display device further includes: a third connecting line and a fourth connecting line;

[0032] A third connection line is connected between a first pad connected to two test terminals and a first pad connected to one test terminal;

[0033] The fourth connection line is connected between the second pad connected to the two first pads and the second pad connected to the one first pad.

[0034] Optionally, the test end includes: a first test end, a second test end, a third test end, a fourth test end and a fifth test end;

[0035] The first pad includes a first sub-pad, a second sub-pad, a third sub-pad and a fourth sub-pad;

[0036] The second pad includes a first sub-pad and a second sub-pad;

[0037] The pins include a first pin and a second pin;

[0038] The first pin is bound and connected to the second sub-pad, and the second pin is bound and connected to the first sub-pad;

[0039] The first test end is connected to the second sub-pad through the first connection line, the second sub-pad is connected to the first sub-pad through the third connection line, the first sub-pad is connected to the second test end through the first connection line, and the first sub-pad is connected to the third test end through the first connection line;

[0040] The first sub-pad is connected to the second sub-pad through the second connecting line, the second sub-pad is connected to the first sub-pad through the fourth connecting line, the first sub-pad is connected to the third sub-pad through the second connecting line, and the third sub-pad is connected to the fourth test terminal through the first connecting line; the first sub-pad is also connected to the fourth sub-pad through the second connecting line, and the fourth sub-pad is connected to the fifth test terminal through the first connecting line.

[0041] Optionally, the impedances of the first connecting lines are equal;

[0042] The impedances of the second connecting lines are equal;

[0043] The impedances of the third connecting lines are equal;

[0044] The impedances of the fourth connecting lines are equal;

[0045] Preferably, the lengths of the first connecting lines are the same; the widths of the first connecting lines are the same; and the thicknesses of the first connecting lines are the same.

[0046] Another display device detection method provided by an embodiment of the present invention is used to detect the display device provided in any item of the first aspect; the method comprises:

[0047] Input a test signal to the first test end, and detect a test output signal of the second test end; wherein the test end of the display device includes the first test end and the second test end;

[0048] The bonding impedance of the first pad and the connection end of the first bonding area is determined according to the test signal and the test output signal.

[0049] The technical solution of the embodiment of the present invention is to bind and connect multiple first pads in the first binding area on the display panel to multiple connection terminals on the flexible circuit board. Multiple test terminals located in the test area of ​​the flexible circuit board are electrically connected to the connection terminal, and the binding impedance between the first pad and the connection terminal is tested through the test terminal. In addition, by setting multiple connection terminals including a first connection terminal and a second connection terminal, a first connection terminal is electrically connected to at least two test terminals, a second connection terminal is electrically connected to at least one test terminal, and the first pad bound to the first connection terminal is electrically connected to the first pad bound to the second connection terminal, the influence of the resistance of the connection line between the test terminal and the first pad on the test accuracy of the binding impedance between the first pad and the connection terminal can be better eliminated, the test accuracy of the binding impedance between the first pad and the connection terminal of the display panel is improved, the accuracy of the control and analysis of the impedance is improved, and the display effect of the display device is improved.

[0050] 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

[0051] 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.

[0052] Figure 1 is a structural schematic diagram of a display device provided by an embodiment of the present invention;

[0053] Figure 2a is a schematic structural diagram of another display device provided by an embodiment of the present invention;

[0054] Figure 2b is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0055] Figure 3 is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0056] Figure 4 is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0057] Figure 5 is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0058] Figure 6 is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0059] Figure 7 It is a flow chart of a detection method for a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0060] 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.

[0061] 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.

[0062] As mentioned in the background technology, if the binding impedance of the display device is too large, it will affect the display effect of the display panel. However, the existing detection method of the binding impedance of the display panel has the problem of low detection accuracy, which affects the display effect of the display device. After long-term research, the inventor found that the existing test method of the binding impedance ignores the resistance of the connection between the test end and the binding impedance of the flexible circuit board (FPC). The connection resistance of the FPC varies greatly due to the difference in the copper thickness of the wiring. The accuracy of the binding impedance measured by the existing test method is low, which causes great trouble to the control and analysis of the binding impedance, and affects the display effect of the display device.

[0063] Figure 1 is a schematic diagram of the structure of a display device provided by an embodiment of the present invention. Figure 1 The display device provided by the embodiment of the present invention includes a display panel 100 and a flexible circuit board 200 bound to the display panel 100; the display panel 100 includes at least one first binding area 101 bound to the flexible circuit board 200; the first binding area 101 includes a plurality of first pads A; the flexible circuit board 200 includes a plurality of connection terminals B, which are bound and connected to the first pads A; the flexible circuit board 200 also includes a test area 102, which includes a plurality of test terminals C; the test terminal C is electrically connected to the connection terminal B, and the test terminal C is used to test the binding impedance between the first pad A and the connection terminal B; wherein the plurality of connection terminals B include a first connection terminal B2 and a second connection terminal B1, a first connection terminal B2 is electrically connected to at least two test terminals C, a second connection terminal B1 is electrically connected to at least one test terminal C, and the first pad A bound and connected to the first connection terminal B2 is electrically connected to the first pad A bound and connected to the second connection terminal B1. wherein the first connection terminal B2 and the second connection terminal B1 are connected to different test terminals C.

[0064] Specifically, the display device provided by the embodiment of the present invention may include terminals such as mobile phones, tablet computers, and wearable devices. The flexible printed circuit board 200 (Flexible Printed Circuit, FPC) is a highly reliable flexible printed circuit board made of polyimide or polyester film as a substrate. A plurality of connection terminals B are provided on the flexible circuit board 200, and the connection terminals B may be gold fingers provided on the flexible circuit board 200. The driving signal line connected to the display panel 100 is bent to the non-light-emitting side of the display panel 100 through the flexible circuit board 200, which is conducive to achieving a narrow frame of the display panel 100.

[0065] The first binding area 101 of the display panel 100 is provided with a plurality of first pads A, and the flexible circuit board 200 can be bound together with the first pads A through the connection terminal B to realize the electrical connection between the flexible circuit board 200 and the display panel 100. The flexible circuit board 200 includes a test area 102, and the test area 102 is provided with a plurality of test terminals C, and the test terminals C can be input with a test signal and the test output signal on the test terminals C can be detected to realize the measurement of the binding impedance between the first pads A and the connection terminal B.

[0066] A first connection terminal B2 is electrically connected to at least two test terminals C, a second connection terminal B1 is electrically connected to at least one test terminal C, and a first pad A bounded to the first connection terminal B2 is electrically connected to a first pad A bounded to the second connection terminal B1. This arrangement can form at least three paths between the first pad A connected to at least two test terminals C and the first pad A connected to at least one test terminal C. The binding impedance between the first pad A and the connection terminal B can be determined according to the total impedance of the path with a larger impedance and the total impedance of the path with the smallest impedance. This arrangement can better eliminate the influence of the connection resistance between the test terminal C and the first pad A, such as the resistance of the driving connection, on the test accuracy of the binding impedance between the first pad A and the connection terminal B, improve the test accuracy of the binding impedance between the first pad A and the connection terminal B of the display device, improve the accuracy of the control and analysis of the impedance, and thus improve the display effect of the display device.

[0067] The technical solution provided in this embodiment is to bind and connect a plurality of first pads A in the first binding area 101 on the display panel 100 with a plurality of connection terminals B on the flexible circuit board 200. A plurality of test terminals C in the test area 102 of the flexible circuit board 200 are electrically connected to the connection terminals B, and the binding impedance between the first pads A and the connection terminals B is tested through the test terminals C. In addition, by setting a first connection terminal B2 to be electrically connected to at least two test terminals C, a second connection terminal B1 to be electrically connected to at least one test terminal C, and a first pad A to be bound and connected to the first pad A to be bound and connected to the second connection terminal B1, the influence of the resistance of the connection line between the test terminal C and the first pad A on the test accuracy of the binding impedance between the first pad A and the connection terminal B can be better eliminated, the test accuracy of the binding impedance between the first pad A and the connection terminal B of the display panel 100 is improved, the control and analysis accuracy of the impedance is improved, and the display effect of the display device is improved.

[0068] Optional, Figure 2a FIG. 1 is a schematic diagram of another display device provided by an embodiment of the present invention. Figure 2a, at least two test terminals C of the display device provided in this embodiment connected to the same first connection terminal B2 and the first connection terminal B2 form a first test loop T1; the first pad A includes a first sub-pad A2 and a second sub-pad A1, the first sub-pad A2 is bound and connected to the first connection terminal B2, the second sub-pad A1 is bound and connected to the second connection terminal B1, and the first sub-pad A2 and the second sub-pad A1 are electrically connected; the test terminal C (such as test terminal C2 or test terminal C3) connected to the first connection terminal B2, the first connection terminal B2, the first sub-pad A2, the second sub-pad A1, the second connection terminal B1 and the test terminal C1 connected to the second connection terminal B1 form a second test loop T2. Optionally, the test terminal C is specifically used to test the second test impedance of the second test loop T2 and the first test impedance of the first test loop T1, and the second test impedance and the first test impedance are used to determine the binding impedance between the first pad A and the connection terminal B.

[0069] Specifically, Figure 2a In the example, it is shown that the first pad A includes four first pads A, namely A1, A2, A3 and A4, the connection terminal B includes four connection terminals B, namely B1, B2, B3 and B4, and the test terminal C includes five test terminals C, namely C1, C2, C3, C4 and C5. The first test loop T1 is C3-B2-C2; the second test loop T2 is C3-B2-A2-A1-B1-C1, and the binding impedance between the first pad A and the connection terminal B is calculated according to half of the difference between the second test impedance of the second test loop T2 and the first test impedance of the first test loop T1. It can be determined that the binding impedance between the first pad A and the connection terminal B is equal to half of the difference between the second test impedance of the second test loop T2 and the first test impedance of the first test loop T1. This setting realizes the accurate measurement of the binding impedance between the first pad A and the connection terminal B, eliminates the interference of the impedance of the connection between the test terminal C and the connection terminal B, and improves the test accuracy of the binding impedance measurement between the first pad A and the connection terminal B.

[0070] An optional implementation method, Figure 2b FIG. 1 is a schematic diagram of the structure of another display device provided by an embodiment of the present invention. Figure 2b , Figure 2bIn the example, it is shown that the first pad A includes four first pads A, namely A1, A2, A3 and A4, the connection terminal B includes four connection terminals B, namely B1, B2, B3 and B4, and the test terminal C includes six test terminals C, namely C1, C2, C3, C4, C5 and C6. The first test loop T1 is C3-B2-C2, or C6-B1-C1; the second test loop T2 is C3-B2-A2-A1-B1-C1, or C6-B1-A1-A2-B2-C2. The first test impedance of the first test loop T1 is equal to the average of the impedance calculated by the C3-B2-C2 loop and the impedance calculated by the C6-B1-C1 loop. The second test impedance of the second test loop T2 is equal to the average of the impedance calculated by the C3-B2-A2-A1-B1-C1 loop and the impedance calculated by the C6-B1-A1-A2-B2-C2 loop.

[0071] The binding impedance between the first pad A and the connection terminal B is calculated according to half of the difference between the second test impedance mean of the second test loop T2 and the first test impedance mean of the first test loop T1. This setting realizes accurate measurement of the binding impedance between the first pad A and the connection terminal B, eliminates the interference of the impedance of the connection line between the test terminal C and the connection terminal B, and further improves the test accuracy of the binding impedance measurement between the first pad A and the connection terminal B.

[0072] Furthermore, a first connection terminal B2 is electrically connected to at least two test terminals C, and a second connection terminal B1 is electrically connected to at least one test terminal C, so as to provide as many test loops as possible for the test loop, and the multiple test loops serve as backup test loops for each other, further improving the test accuracy.

[0073] Optional, Figure 3 FIG. 1 is a schematic diagram of the structure of another display device provided by an embodiment of the present invention. Figure 3 The test area 102 of the display device provided in this embodiment may also include: a first connecting line 1, the first connecting line 1 is connected between the test terminal C and the connection terminal B; at least two test terminals C connected to the same connection terminal B are respectively connected in parallel to the connection terminal B through the corresponding first connecting line 1.

[0074] Specifically, the first connection line 1 may be a driving signal line on a flexible circuit board. The first connection line 1 is connected between the test terminal C and the connection terminal B, and at least two test terminals C are respectively connected in parallel to one connection terminal B through the first connection line 1, so that one connection terminal B is connected to at least two test terminals C, and the first pad A connected to at least two test terminals C is connected to at least one first pad A connected to one test terminal C, which can better eliminate the influence of the resistance of the first connection line between the test terminal C and the first pad A on the test accuracy of the binding impedance between the first pad A and the connection terminal B, further improve the test accuracy of the binding impedance between the first pad A and the connection terminal B of the display panel 100, improve the accuracy of the control and analysis of the impedance, and thus improve the display effect of the display device.

[0075] Optional, Figure 4 FIG. 1 is a schematic diagram of the structure of another display device provided by an embodiment of the present invention. Figure 4 The display device provided in this embodiment may further include: a driver chip 300 bound to the display panel 100. The display panel 100 may further include: at least one second binding area 103 for binding the driver chip 300; the second binding area 103 includes a second pad D, and the driver chip 300 includes a plurality of pins E; the pin E is bound and connected to the second pad D; at least two pins E connected to the second pad D are electrically connected to each other; the second pad D is electrically connected to the first pad A correspondingly, wherein the second pad includes a first sub-pad D2, and one first sub-pad D2 is connected to at least two first pads A; the test terminal C is also used to test the binding impedance between the second pad D and the pin E.

[0076] Specifically, the driver chip 300 is bound and connected to the second pad D on the display panel 100 through a plurality of pins E, so that the driver chip 300 can transmit the driving signal to the display panel 100, thereby controlling the display effect of the display panel 100. The two pins E of the driver chip 300 are electrically connected to each other, and the second pad D is electrically connected to the first pad A correspondingly, so as to form a test loop. At least one second pad D is connected to the two first pads A, so that two test loops can be extended between the first pad A and the second pad D, so as to save the number of pins E of the driver chip 300. In some optional application scenarios, for example, the number of pins E of the driver chip 300 of a wearable device is small, and at least one second pad D is connected to the two first pads A, so that the binding impedance between the second pad D and the pin E can be tested through the test terminal C, thereby improving the test accuracy of the binding impedance, and saving the number of pins E of the driver chip 300, thereby saving the cost of the display device.

[0077] Optional, Figure 5 FIG. 1 is a schematic diagram of the structure of another display device provided by an embodiment of the present invention. Figure 5 The display panel 100 of the display device provided in this embodiment may also include a second connecting line 2, which is connected between the second pad D and the first pad A; at least two first pads A connected to the same second pad D are respectively connected in parallel to an end of the second pad D away from the driving chip 300 through corresponding second connecting lines 2.

[0078] Specifically, the second connection line 2 is connected between the second pad D and the first pad A, and the multiple first pads A connected to the same second pad D are respectively connected in parallel to the end of the second pad D away from the driving chip 300 through the second connection line 2, so that three paths can be formed between the second pad D connected to two first pads A and the second pad D connected to one first pad A. According to the total impedance of the path with larger impedance and the total impedance of the path with the smallest impedance, the binding impedance between the pin E and the second pad D can be determined. This setting can improve the test accuracy of the binding impedance between the pin E and the second pad D of the display device, further improve the accuracy of impedance control and analysis, and further improve the display effect of the display device.

[0079] Optional, Figure 6 FIG. 1 is a schematic diagram of the structure of another display device provided by an embodiment of the present invention. Figure 6 , the display device provided in this embodiment includes at least two first pads A connected to the same second pad D and test terminals C electrically connected to the at least two first pads A respectively, forming a third test loop T3; the second pad D also includes a second sub-pad D1, and a second sub-pad D1 is connected to at least one first pad A; the first pad A connected to the first sub-pad D2 and the test terminal C connected to the first pad A, the first pad A connected to the second sub-pad D1 and the test terminal C connected to the first pad A, the first sub-pad D2 and the second sub-pad D1 form a fourth test loop T4. Optionally, the test terminal C is also used to test the fourth test impedance of the fourth test loop T4 and the third test impedance of the third test loop T3, so as to determine the binding impedance between the second pad D and the pin E according to the fourth test impedance and the third test impedance.

[0080] Specifically, Figure 6 In the example, the first pad A includes four first pads A, namely A1, A2, A3 and A4, the connection terminal B includes four connection terminals B, namely B1, B2, B3 and B4, the test terminal C includes five test terminals C, namely C1, C2, C3, C4 and C5, the second pad D includes two second pads D, namely D1 and D2, and the pin E includes two pins E, namely E1 and E2. Among them, Figure 6In an optional manner, the third test loop T3 is C5-1-B4-A4-2-E2-2-A3-B3-C4; the fourth test loop T4 is

[0081] C5-1-B4-A4-2-E2-D2-D1-E1-2-A2-B2-C3. Test terminal C calculates the binding impedance between pin E and the second pad D according to the difference between the fourth test impedance of the fourth test loop T4 and the third test impedance of the third test loop T3. It can be determined that the binding impedance between pin E and the second pad D is equal to half of the difference between the fourth test impedance of the fourth test loop T4 and the third test impedance of the third test loop T3. This setting realizes the accurate measurement of the binding impedance between pin E and the second pad D, eliminates the interference of the impedance of the first connecting line 1 between the test terminal C and the connection terminal B and the impedance of the second connecting line 2 between pin E and the first pad A, and improves the test accuracy of the binding impedance measurement between pin E and the second pad D.

[0082] Optionally, based on the above embodiment, continue to refer to Figure 6 The display device provided in this embodiment also includes: a third connecting line 3 and a fourth connecting line 4; the third connecting line 3 is connected between a first pad A connected to two test terminals C and a first pad A connected to one test terminal C; the fourth connecting line 4 is connected between a second pad D connected to two first pads A and a second pad D connected to one first pad A.

[0083] Specifically, the third connection line 3 is connected between the first pad A connected to two test terminals C and the first pad A connected to one test terminal C, which can better connect the two first pads A to form a second test loop T2, such as C3-B2-A2-3-A1-B1-C1. The fourth connection line 4 is connected between the first sub-pad D2 connected to the two first pads A and the second sub-pad D1 connected to the one first pad A, so as to form a fourth test loop T4, such as

[0084] The fourth connection line 4 may be a connection line inside the driving chip 300 or an external connection line for testing.

[0085] Optionally, based on the above embodiment, continue to refer to Figure 6The test terminal C of the display device provided in this embodiment may include: a first test terminal C1, a second test terminal C2, a third test terminal C3, a fourth test terminal C4 and a fifth test terminal C5; the first pad A includes a first sub-pad A2, a second sub-pad A1, a third sub-pad A3 and a fourth sub-pad A4; the second pad D includes a first sub-pad D2 and a second sub-pad D1; the pin E includes a first pin E1 and a second pin E2; the first pin E1 is bound and connected to the second sub-pad D1, and the second pin E2 is bound and connected to the first sub-pad D2; the first test terminal C1 is connected to the second sub-pad A1 through a first connection line 1, and the second sub-pad A1 is connected to the third connection line 3 is connected to the first sub-pad A2, the first sub-pad A2 is connected to the second test terminal C2 through the first connection line 1, and the first sub-pad A2 is connected to the third test terminal C3 through the first connection line 1; the first sub-pad A3 or A4 is connected to the first sub-pad D2 through the second connection line 2, the second sub-pad D1 and the second sub-pad D2 are connected through the fourth connection line 4, the first sub-pad D2 is connected to the third sub-pad A3 through the second connection line 2, and the third sub-pad A3 is connected to the fourth test terminal C4 through the first connection line 1; the first sub-pad D2 is also connected to the fourth sub-pad A4 through the second connection line 2, and the fourth sub-pad A4 is connected to the fifth test terminal C5 through the first connection line 1.

[0086] Specifically, such a configuration can provide a third test loop T3 and multiple fourth test loops T4, which can achieve accurate measurement of the binding impedance between the second pad D and the pin E, eliminate the interference of the impedance of the first connecting line 1 between the test terminal C and the connection terminal B and the impedance of the second connecting line 2 between the pin E and the second pad D, and further improve the test accuracy of the binding impedance measurement between the second pad D and the pin E.

[0087] Optionally, based on the above embodiment, continue to refer to Figure 6 , the impedance of each first connection line 1 provided in this embodiment is equal; the impedance of each second connection line 2 is equal; the impedance of each third connection line 3 is equal; the impedance of each fourth connection line 4 is equal. Preferably, the length of each first connection line 1 is the same; the width of each first connection line 1 is the same; the thickness of each first connection line 1 is the same.

[0088] Specifically, such a configuration further improves the detection accuracy of the binding impedance between the first pad A and the connection terminal B and the binding impedance between the pin E and the second pad D of the display device, and further improves the display effect of the display device.

[0089] Preferably, the lengths of the first connection lines 1 are the same; the widths of the first connection lines 1 are the same; and the thicknesses of the first connection lines 1 are the same. This arrangement simplifies the process and reduces the process cost. On the other hand, it can improve the detection accuracy of the binding impedance between the first pad A and the connection end B of the display device and the binding impedance between the pin E and the second pad D, further improving the display effect of the display device.

[0090] An embodiment of the present invention provides a detection method for a display device. Figure 7 FIG. 1 is a flow chart of a detection method for a display device provided by an embodiment of the present invention. Figure 7 The display device detection method provided in the embodiment of the present invention is used to detect the display device provided in any of the above embodiments. The display device detection method provided in the embodiment of the present invention includes:

[0091] S801, input a test signal to a first test terminal, and detect a test output signal of a second test terminal; wherein the test terminal of the display device includes a first test terminal and a second test terminal.

[0092] S802 : Determine the bonding impedance of the first pad and the connection end of the first bonding area according to the test signal and the test output signal.

[0093] An optional embodiment mode, combined with Figure 6 and Figure 7 , the first test loop T1 can be set to C3-1-B2-1-C2. The second test loop T2 can be set to C3-1-B2-A2-3-A1-B1-1-C1. A test signal can be input into the third test terminal C3 to test the test output signal of the first test terminal C1 and the test output signal of the second test terminal C2 respectively. According to the test signal and the test output signal, the first test impedance and the second test impedance are determined, and according to half of the difference between the second test impedance and the first test impedance, the binding impedance of the first pad A and the connection terminal B of the first binding area 101 is determined.

[0094] Another alternative is to combine Figure 6 and Figure 7, the third test loop T3 can be set to C5-1-B4-A4-2-E2-2-A3-B3-1-C4; the fourth test loop T4 can be set to C5-1-B4-A4-2-E2-D2-4-D1-E1-2-A1-B1-C1. A test signal, such as a first constant voltage signal, can be loaded on the fifth test terminal C5, and the test output signal of the fourth test terminal C4, such as a third voltage value and a third current value, can be tested respectively, and the test output signal of the first test terminal C1, such as a fourth voltage value and a fourth current value, can be tested respectively. Exemplarily, the third test impedance is determined according to the first constant voltage signal, the third voltage value, and the third current value. The fourth test impedance is determined according to the first constant voltage signal, the fourth voltage value, and the fourth current value. The binding impedance of the second pad D and the pin E of the second binding area 103 is determined according to half of the difference between the fourth test impedance and the third test impedance.

[0095] The detection method of the display device provided in the present embodiment detects the test output signal of the second test end by inputting a test signal to the first test end; wherein the test end of the display device includes the first test end and the second test end, and the binding impedance of the first pad and the connection end of the first binding area is determined according to the test signal and the test output signal. Such a setting can better eliminate the influence of the resistance of the connection line between the test end and the first pad on the test accuracy of the binding impedance between the first pad and the connection end, improve the test accuracy of the binding impedance between the first pad and the connection end of the display panel, improve the control and analysis accuracy of the impedance, and thus improve the display effect of the display device.

[0096] 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.

[0097] 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 device, characterized in that: The display device comprises: A display panel and a flexible circuit board bound to the display panel; The display panel includes at least one first binding area for binding the flexible circuit board; the first binding area includes a plurality of first pads; The flexible circuit board comprises a plurality of connection ends, and the connection ends are bound and connected to the first pads; The flexible circuit board further includes a test area, the test area includes a plurality of test terminals; the test terminals are electrically connected to the connection terminals, and the test terminals are used to test the binding impedance between the first pad and the connection terminals; The multiple connection terminals include a first connection terminal and a second connection terminal, one of the first connection terminals is electrically connected to at least two of the test terminals, one of the second connection terminals is electrically connected to at least one of the test terminals, and the first pad bound to the first connection terminal is electrically connected to the first pad bound to the second connection terminal; The display device further includes: A driving chip bound to the display panel; The display panel further comprises: at least one second binding area for binding the driving chip; The second binding area includes a second pad, and the driving chip includes a plurality of pins; the pins are bound and connected to the second pad; At least two of the pins connected to the second pad are electrically connected to each other; The second pad is electrically connected to the first pad, wherein the second pad includes a first sub-pad, and one of the first sub-pads is connected to at least two of the first pads; The test end is also used to test the binding impedance between the second pad and the pin.

2. The display device according to claim 1, characterized in that At least two of the test terminals connected to the same first connection terminal and the first connection terminal form a first test loop; The first pad includes a first sub-pad and a second sub-pad, the first sub-pad is bound and connected to the first connection end, the second sub-pad is bound and connected to the second connection end, and the first sub-pad is electrically connected to the second sub-pad; The test end connected to the first connection end, the first connection end, the first sub-pad, the second sub-pad, the second connection end, and the test end connected to the second connection end form a second test loop.

3. The display device according to claim 2, characterized in that: The test end is specifically used to test the second test impedance of the second test loop and the first test impedance of the first test loop, and the second test impedance and the first test impedance are used to determine the binding impedance between the first pad and the connection end.

4. The display device according to claim 1, characterized in that The test area further includes: A first connecting line, the first connecting line is connected between the test end and the connecting end; At least two of the test terminals connected to the same connection terminal are respectively connected in parallel to the connection terminal through corresponding first connection lines.

5. The display device according to claim 1, characterized in that The display panel further includes: A second connecting line, wherein the second connecting line is connected between the second pad and the first pad; At least two of the first pads connected to the same second pad are respectively connected in parallel to an end of the second pad away from the driving chip through corresponding second connection lines.

6. The display device according to claim 1, characterized in that: At least two of the first pads connected to the same second pad and the test ends electrically connected to the first pads respectively form a third test loop; The second pad further includes a second sub-pad, and one of the second sub-pads is connected to at least one of the first pads; The first pad connected to the first sub-pad and the test end connected to the first pad, the first pad connected to the second sub-pad and the test end connected to the first pad, and the first sub-pad and the second sub-pad form a fourth test loop.

7. The display device according to claim 6, characterized in that: The test end is further used to test the binding impedance between the second pad and the pin by testing the fourth test impedance of the fourth test loop and the third test impedance of the third test loop.

8. The display device according to claim 5, characterized in that The display device further includes: a third connecting line and a fourth connecting line; The third connecting line is connected between the first pad connected to the two test terminals and the first pad connected to the one test terminal; The fourth connection line is connected between the second pad connected to two first pads and the second pad connected to one first pad.

9. The display device according to claim 8, characterized in that: The test end includes: a first test end, a second test end, a third test end, a fourth test end and a fifth test end; The first pad includes a first sub-pad, a second sub-pad, a third sub-pad and a fourth sub-pad; The second pad includes a first sub-pad and a second sub-pad; The pins include a first pin and a second pin; The first pin is bound and connected to the second sub-pad, and the second pin is bound and connected to the first sub-pad; The first test end is connected to the second sub-pad through a first connection line, the second sub-pad is connected to the first sub-pad through a third connection line, the first sub-pad is connected to the second test end through the first connection line, and the first sub-pad is connected to the third test end through the first connection line; The first sub-pad is connected to the second sub-pad through the second connecting line, the second sub-pad is connected to the first sub-pad through the fourth connecting line, the first sub-pad is connected to the third sub-pad through the second connecting line, and the third sub-pad is connected to the fourth test terminal through the first connecting line; the first sub-pad is also connected to the fourth sub-pad through the second connecting line, and the fourth sub-pad is connected to the fifth test terminal through the first connecting line.

10. The display device according to claim 9, characterized in that: The impedances of the first connecting lines are equal; The impedances of the second connecting lines are equal; The impedances of the third connecting lines are equal; The impedances of the fourth connecting lines are equal.

11. The display device according to claim 10, characterized in that: The lengths of the first connecting lines are the same; the widths of the first connecting lines are the same; and the thicknesses of the first connecting lines are the same.

12. A method for detecting a display device, characterized in that: The method is used to detect the display device according to any one of claims 1 to 11, wherein the test end includes a first test end and a second test end; the method includes: Input a test signal to the first test end, and detect a test output signal of the second test end; wherein the test end of the display device includes a first test end and a second test end; The bonding impedance of the first pad and the connection end of the first bonding area is determined according to the test signal and the test output signal.

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