Display module and display device

Abstract

The present application provides a display module and a display device. The display module comprises a display panel and a touch and display driver integrated circuit. The display panel comprises a substrate, and a plurality of touch electrodes, a plurality of flexible circuit board terminals and a plurality of test touch signal lines which are arranged on the substrate. The touch and display driver integrated circuit is electrically connected to the touch electrodes.

Description

Display module and display device

[0001] This application claims priority to Chinese patent application No. 202410404635.1 filed on April 3, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0003] Active-matrix organic light-emitting diode (OLED) on-cell touch display panels are widely used in interactive electronic devices due to their high durability, long lifespan, and multi-touch support. Currently, flexible AMOLED on-cell touch display panels require inspection before module assembly to detect front-end design issues and reduce subsequent module material loss. Because the current method for inspecting display panel integrity typically involves probing terminals for continuity testing, additional inspection circuitry must be designed into the panel, occupying a significant portion of the panel's frame wiring area. SUMMARY OF THE INVENTION

[0004] Traditional detection circuits place test terminals below or to the left and right of flexible circuit board terminals. Touch signal lines run from the touch metal layer to the flexible circuit board terminals. The flexible circuit board terminals then pass through the touch metal layer and the source and drain electrode metal layers. Then, traces are routed through the gate metal layer and the source and drain electrode metal layers to connect the flexible circuit board terminals and the test terminals. This connects the touch electrodes to the test terminals, allowing detection of touch circuit shorts. However, current flexible AMOLED on-cell touch display panels all use a mutual capacitance design, where the test terminals of the detection circuit are directly connected to the touch electrodes one-to-one through the flexible circuit board terminals, resulting in a large number of flexible circuit board terminals.

[0005] An embodiment of the present application provides a display module, comprising:

[0006] A display panel includes a display area and a binding area disposed on one side of the display area. The display panel also includes a substrate and a plurality of touch electrodes, a plurality of flexible circuit board terminals, and a plurality of test touch signal lines disposed on the substrate. The touch electrodes are disposed in the display area, the flexible circuit board terminals and the test touch signal lines are both disposed in the binding area, and the flexible circuit board terminals are used for externally connecting to a flexible circuit board.

[0007] a touch display driver integrated circuit, disposed in the binding area, the touch display driver integrated circuit being electrically connected to the touch electrodes;

[0008] In which, the flexible circuit board terminal is arranged on a side of the touch display driver integrated circuit away from the display area, one end of the test touch signal line is electrically connected to the touch display driver integrated circuit, the first end of the test touch signal line is electrically connected to the touch display driver integrated circuit, and the other end of the test touch signal line extends through one side of the flexible circuit board terminal in the thickness direction or at least one side in the direction perpendicular to the thickness direction to the edge of the display panel located on the side of the binding area away from the display area, and the end face of the other end of the test touch signal line is exposed to the outside of the display panel.

[0009] An embodiment of the present application further provides a display device, comprising a frame and a display module, wherein the display module is disposed on the frame, and the display module comprises:

[0010] A display panel includes a display area and a binding area disposed on one side of the display area. The display panel also includes a substrate and a plurality of touch electrodes, a plurality of flexible circuit board terminals, and a plurality of test touch signal lines disposed on the substrate. The touch electrodes are disposed in the display area, the flexible circuit board terminals and the test touch signal lines are both disposed in the binding area, and the flexible circuit board terminals are used for externally connecting to a flexible circuit board.

[0011] a touch display driver integrated circuit, disposed in the binding area, the touch display driver integrated circuit being electrically connected to the touch electrodes;

[0012] In which, the flexible circuit board terminal is arranged on a side of the touch display driver integrated circuit away from the display area, one end of the test touch signal line is electrically connected to the touch display driver integrated circuit, and the other end of the test touch signal line extends through one side of the flexible circuit board terminal in the thickness direction or at least one side in the direction perpendicular to the thickness direction to the edge of the display panel located on the side of the binding area away from the display area, and the end face of the other end of the test touch signal line is exposed to the outside of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below only disclose some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] FIG1 is a schematic diagram of a partial structure of a lower frame of a display panel before being cut according to an embodiment of the present application;

[0015] Figure 2 is an enlarged schematic diagram of point a in Figure 1;

[0016] FIG3 is a plan view of a display module provided in an embodiment of the present application;

[0017] FIG4 is an enlarged schematic diagram of point b in FIG3 ;

[0018] FIG5 is an enlarged schematic diagram of point b of a display panel before being cut, provided by an embodiment of the present application;

[0019] FIG6 is an enlarged schematic diagram of point c in FIG5 ;

[0020] FIG7 is an enlarged schematic diagram of point d in FIG6;

[0021] FIG8 is a cross-sectional view along the AA' direction shown in FIG7;

[0022] FIG9 is a cross-sectional view along the BB' direction shown in FIG3;

[0023] FIG10 is a schematic diagram of a partial structure of another display module provided in an embodiment of the present application;

[0024] FIG11 is a cross-sectional view taken along the CC' direction shown in FIG10;

[0025] FIG12 is a schematic structural diagram of a display device provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] The present application may repeat reference numerals and / or reference letters in different embodiments. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0029] An embodiment of the present application provides a display module and a display device including the display module. The display module includes:

[0030] A display panel includes a display area and a binding area disposed on one side of the display area. The display panel also includes a substrate and a plurality of touch electrodes, a plurality of flexible circuit board terminals, and a plurality of test touch signal lines disposed on the substrate. The touch electrodes are disposed in the display area, the flexible circuit board terminals and the test touch signal lines are both disposed in the binding area, and the flexible circuit board terminals are used for externally connecting to a flexible circuit board.

[0031] a touch display driver integrated circuit, disposed in the binding area, the touch display driver integrated circuit being electrically connected to the touch electrodes;

[0032] In which, the flexible circuit board terminal is arranged on a side of the touch display driver integrated circuit away from the display area, one end of the test touch signal line is electrically connected to the touch display driver integrated circuit, the first end of the test touch signal line is electrically connected to the touch display driver integrated circuit, and the other end of the test touch signal line extends through one side of the flexible circuit board terminal in the thickness direction or at least one side in the direction perpendicular to the thickness direction to the edge of the display panel located on the side of the binding area away from the display area, and the end face of the other end of the test touch signal line is exposed to the outside of the display panel.

[0033] According to an embodiment of the present application, orthographic projections of at least some segments of the test touch signal lines on the substrate are located between orthographic projections of some adjacent flexible circuit board terminals on the substrate.

[0034] According to an embodiment of the present application, orthographic projections of partial line segments of a plurality of test touch signal lines on the substrate are located between orthographic projections of two adjacent flexible circuit board terminals on the substrate.

[0035] According to one embodiment of the present application, the orthographic projections of some line segments of some of the test touch signal lines on the substrate are located between the orthographic projections of some adjacent flexible circuit board terminals on the substrate, and the orthographic projections of some line segments of some of the test touch signal lines on the substrate overlap with the orthographic projections of some of the flexible circuit board terminals on the substrate.

[0036] According to one embodiment of the present application, there is an orthographic projection of partial line segments of multiple test touch signal lines on the substrate between the orthographic projections of two adjacent flexible circuit board terminals on the substrate, and the orthographic projection of the same flexible circuit board terminal on the substrate overlaps with the orthographic projections of partial line segments of multiple test touch signal lines on the substrate.

[0037] According to an embodiment of the present application, the test touch signal line includes a first section and a second section connected to the first section, wherein the first section is provided on a side of the flexible circuit board terminal close to the touch display driver integrated circuit;

[0038] Among them, the orthographic projection of the second segment on the substrate is located between the orthographic projections of some adjacent flexible circuit board terminals on the substrate or overlaps with the orthographic projections of some flexible circuit board terminals on the substrate, the second segment is arranged on a different layer from the first segment, and the second segment is arranged on a different layer from the flexible circuit board terminals.

[0039] According to an embodiment of the present application, the display panel further includes at least one gate metal layer and at least one source / drain electrode metal layer, wherein the gate metal layer is disposed on the substrate, and the source / drain electrode metal layer is disposed on a side of the gate metal layer facing away from the substrate;

[0040] The second segment is provided in the same layer as the gate metal layer, and part of the line segments of the first segment is provided in the same layer as the source-drain electrode metal layer.

[0041] According to an embodiment of the present application, the display panel further includes a first gate metal layer and a second gate metal layer, wherein the second gate metal layer is disposed on a side of the first gate metal layer facing away from the substrate;

[0042] Part of the second sections of the test touch signal lines are provided on the same layer as the first gate metal layer, and another part of the second sections of the test touch signal lines are provided on the same layer as the second gate metal layer.

[0043] According to an embodiment of the present application, the test touch signal line includes a first test touch signal line and a second test touch signal line, the second segment of the first test touch signal line is disposed on the same layer as the first gate metal layer, the second segment of the second test touch signal line is disposed on the same layer as the second gate metal layer, and at least one second segment of the first test touch signal line and at least one second segment of the second test touch signal line are located between orthographic projections of two adjacent flexible circuit board terminals on the substrate;

[0044] The orthographic projection of the second section of the first test touch signal line on the substrate and the orthographic projection of the second section of the second test touch signal line on the substrate are staggered.

[0045] According to an embodiment of the present application, the display panel further includes a plurality of floating terminals, and the floating terminals are arranged side by side and spaced apart from the flexible circuit board terminals.

[0046] As shown in Figures 1 and 2, Figure 1 is a schematic diagram of the partial structure of the lower frame of the display panel provided by an embodiment of the present application before it is cut, and Figure 2 is an enlarged schematic diagram of point a in Figure 1. Test terminals 11 are arranged below or on the left and right sides of flexible circuit board terminals 12. Test touch signal lines 13 are electrically connected to touch electrodes and corresponding flexible circuit board terminals 12 respectively. Flexible circuit board terminals 12 are then electrically connected to corresponding test terminals 11 via routing, thereby connecting the touch electrodes to test terminals 11, thereby detecting open and short circuit conditions of the touch circuit. Because the test terminals 11 are connected one-to-one with the flexible circuit board terminals 12, a large number of flexible circuit board terminals 12 are required in the lower frame area to meet the requirements of touch circuit detection. However, a large number of flexible circuit board terminals 12 will occupy a large amount of space, which not only increases the width of the flexible circuit board, but also increases the width of the lower frame of the display panel.

[0047] An embodiment of the present application provides a display module that can reduce the number of flexible circuit board terminals, thereby reducing the width of the display module frame.

[0048] As shown in Figure 3, Figure 3 is a planar schematic diagram of a display module provided by an embodiment of the present application. The display module includes a display panel 1 and a touch display driver integrated circuit 2. The display panel 1 includes a display area AA and a binding area BA1 arranged on one side of the display area AA. The display area AA can be used to realize the function of displaying a screen image. The binding area BA1 is used to bind and connect the touch display driver integrated circuit 2 and the flexible circuit board. The display area AA is provided with a plurality of touch electrodes 15. The touch display driver integrated circuit 2 is electrically connected to the touch electrode 15 through a touch signal line.

[0049] In an embodiment of the present application, the display panel 1 is a flexible OLED display panel, and a bending area BA2 is provided between the display area AA and the binding area BA1. The binding area BA1 can be bent to the back of the display panel 1 along with the bending area BA2.

[0050] As shown in Figure 4, which is an enlarged schematic diagram of point b in Figure 3, the display panel 1 further includes a plurality of flexible circuit board terminals 12 and a plurality of test touch signal lines 13. Both the flexible circuit board terminals 12 and the test touch signal lines 13 are disposed in the binding area BA1. The plurality of flexible circuit board terminals 12 are spaced side by side and are used to connect to an external flexible circuit board. A touch display driver integrated circuit 2 is disposed in the binding area BA1, with the flexible circuit board terminals 12 disposed on a side of the touch display driver integrated circuit 2 facing away from the display area AA. One end of the test touch signal line 13 is electrically connected to the touch display driver integrated circuit 2. The other end of the test touch signal line 13 extends through one side of the flexible circuit board terminals 12 in the thickness direction or at least one side in a direction perpendicular to the thickness direction to an edge of the display panel 1 located on the side of the binding area BA1 facing away from the display area AA. The end surface of the other end of the test touch signal line 13 is exposed to the outside of the display panel.

[0051] In combination with Figures 5 and 6, Figure 5 is an enlarged schematic diagram of point b of the display panel provided by an embodiment of the present application before being cut, and Figure 6 is an enlarged schematic diagram of point c in Figure 5. The test terminal 11 is arranged on the side of the flexible circuit board terminal 12 away from the display area AA, and the other end of the test touch signal line 13 extends to be electrically connected to the corresponding test terminal 11 through one side of the flexible circuit board terminal 12 in the thickness direction or at least one side in the direction perpendicular to the thickness direction. The test terminal 11 is used to connect to the probe of the test equipment when the light-emitting device is lit after preparation. When the display panel is cut, the test terminal 11 and the flexible circuit board terminal 12 connected to the test terminal 11 are connected. Part of the test touch signal line 13 near the test terminal 11 will be cut off. Figure 4 shows the structure at the lower frame of the display panel after the test terminal 11 is cut and removed. After the display panel is cut, the other end of the test touch signal line 13 can be regarded as extending to the edge of the display panel 1 on the side of the binding area BA1 away from the display area AA, and the end face of the other end of the test touch signal line 13 is exposed to the outside of the display panel 1. The test touch signal line 13 defines the end face of the display panel 1 on the side of the binding area BA1 away from the display area AA. The end face of the display panel 1 on the side of the binding area BA1 away from the display area AA is the cutting surface formed by cutting the display panel.

[0052] In some other embodiments, the test terminals 11 may also be disposed on the left and right sides of the flexible circuit board terminal 12 .

[0053] In an embodiment of the present application, the test touch signal line 13 and the flexible circuit board terminal 12 are spaced and insulated in the thickness direction or in a direction perpendicular to the thickness direction, wherein the thickness direction refers to the thickness direction of the display panel, that is, the third direction Z shown in Figure 8, and the direction perpendicular to the thickness direction can refer to any direction located in the plane described in Figure 4, which can be the first direction X or the second direction Y shown in Figure 7.

[0054] Before cutting the display panel, one end of the test touch signal line 13 is electrically connected to the touch display driver integrated circuit 2, and the other end of the test touch signal line 13 is electrically connected to the corresponding test terminal 11. In this way, the test terminal 11 can be electrically connected to the touch electrode without going through the flexible circuit board terminal 12, so that the short-circuit condition of the touch circuit can be detected. Therefore, compared with the embodiments shown in Figures 1 and 2, the present application can reduce the number of flexible circuit board terminals 12 by directly connecting the test touch signal line 13 to the test terminal 11, thereby reducing the space of the lower frame occupied by the flexible circuit board terminal 12, thereby reducing the width and area of ​​the flexible circuit board, and can also reduce the area of ​​the Cell detection circuit, thereby increasing the utilization rate of the large-board layout of the display panel.

[0055] In some other embodiments, the total number of flexible circuit board terminals 12 can be maintained unchanged, and the number of test terminals 11 can be reduced. Under limited space conditions, the number of DC high-voltage power supply terminals and DC low-voltage power supply terminals can be increased to reduce the impedance of the cathode circuit and increase the brightness of the display panel; or, on the basis of reducing the number of flexible circuit board terminals 12, the width of the flexible circuit board terminals 12 can be increased to facilitate binding the flexible circuit board and the crimping terminals and improve their yield.

[0056] In some embodiments, orthographic projections of at least some segments of the test touch signal lines 13 on the substrate 10 are located between orthographic projections of some adjacent flexible circuit board terminals 12 on the substrate 10 .

[0057] In one embodiment, as shown in FIG7 and FIG8 , FIG7 is an enlarged schematic diagram of point d in FIG6 , and FIG8 is a cross-sectional view taken along line AA' of FIG7 , the display panel further comprises a substrate 10, with flexible circuit board terminals 12 and test touch signal lines 13 disposed on the substrate 10. The flexible circuit board terminals 12 are arranged side by side and spaced apart. The orthographic projections of some segments of the test touch signal lines 13 on the substrate 10 are located between the orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10 and are spaced apart from the orthographic projections of the flexible circuit board terminals 12 on the substrate 10. No orthographic projections of some segments of the test touch signal lines 13 on the substrate 10 are disposed between the orthographic projections of some adjacent flexible circuit board terminals 12 on the substrate 10. In this structure, by allowing the test touch signal lines 13 to pass through the area between adjacent flexible circuit board terminals 12 and electrically connect to the test terminals 11, a one-to-one connection between the test terminals 11 and the flexible circuit board terminals 12 is avoided, thereby reducing the number of flexible circuit board terminals 12.

[0058] In some embodiments, orthographic projections of partial segments of the plurality of test touch signal lines 13 on the substrate 10 are located between orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10 .

[0059] As shown in FIG7 , the orthographic projections of some segments of the plurality of test touch signal lines 13 on the substrate 10 are arranged side by side and spaced apart between the orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10 , and the plurality of test touch signal lines 13 located between the orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10 are insulated from each other.

[0060] In some embodiments, the orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10 are separated by orthographic projections of 4 to 5 partial line segments of the test touch signal lines 13 on the substrate 10 .

[0061] In some embodiments, as shown in Figure 6, the test touch signal line 13 includes a first section 131, a second section 132 and a third section 133. The first section 131 is arranged on the side of the flexible circuit board terminal 12 close to the touch display driver integrated circuit 2, and the first section 131 is electrically connected to the output end or input end of the touch display driver integrated circuit 2. The third section 133 is arranged on the side of the flexible circuit board terminal 12 away from the touch display driver integrated circuit 2, and the third section 133 is electrically connected to the corresponding test terminal 11. The second section 132 is arranged between the first section 131 and the third section 133, and the second section 132 is electrically connected to the first section 131 and the third section 133 respectively.

[0062] As shown in Figure 6, the binding area BA1 is provided with multiple driver integrated circuit input terminals 16 and multiple driver integrated circuit output terminals 17. The driver integrated circuit input terminal 16 and the touch signal line 18 are provided in the touch metal layer 116. One end of the touch signal line 18 extends to the display area AA and is electrically connected to the touch electrode. The other end of the touch signal line 18 extends to the side of the driver integrated circuit output terminal 17 of the binding area BA1 close to the display area AA, and is electrically connected to the corresponding driver integrated circuit output terminal 17.

[0063] The first section 131 includes a first sub-segment 1311, a first corner section 1312, a second corner section 1313, and a second sub-segment 1314. The first sub-segment 1311 is connected to the driver integrated circuit output terminal 17 and extends from a side of the driver integrated circuit output terminal 17 near the driver integrated circuit input terminal 16 along the second direction Y to connect to the first corner section 1312. The second corner section 1313 extends from an area between the driver integrated circuit input terminal 16 and the driver integrated circuit output terminal 17 along the first direction X to connect to the second corner section 1313. The second corner section 1313 is bent at least once along a direction intersecting the first direction X and the second direction Y to connect to the second sub-segment 1314. The second sub-segment 1314 extends along the second direction Y to an end of the flexible printed circuit terminal 12 near the driver integrated circuit input terminal 16 and connects to the second section 132.

[0064] As shown in Figures 6 and 7, the second section 132 includes a third sub-segment 1321, a third corner section 1322, a fourth sub-segment 1323, a fourth corner section 1324, and a fifth sub-segment 1325. The third sub-segment 1321 is located on the side of the flexible circuit board terminal 12 close to the driver integrated circuit input terminal 16. The third sub-segment 1321 is connected to the first section 131 and extends along the second direction Y to connect with the third corner section 1322. The third corner section 1322 extends along a direction intersecting the first direction X and the second direction Y to connect with the fourth sub-segment 1323. Next, the fourth sub-segment 1323 extends along the second direction Y from the end of the flexible circuit board terminal 12 closest to the driver integrated circuit input terminal 16 to the end of the flexible circuit board terminal 12 away from the driver integrated circuit input terminal 16 and connects to the fourth corner segment 1324. The fourth corner segment 1324 extends along a direction intersecting the first direction X and the second direction Y to connect to the fifth sub-segment 1325. The fifth sub-segment 1325 extends along the second direction Y to connect to the third segment 133. The third segment 133 extends along the second direction Y to connect to the corresponding test terminal 11. After the display panel 1 is cut, the test terminal 11, the third segment 133, the fifth sub-segment 1325, and the fourth corner segment 1324 of the test touch signal line 13 are all cut and removed, leaving only the first segment 131 and the third sub-segment 1321, the third corner segment 1322, and the fourth sub-segment 1323 of the second segment 132.

[0065] In some embodiments, the distance between the fourth sub-segments 1323 of two adjacent test touch signal lines 13 is smaller than the distance between other portions of the two adjacent test touch signal lines 13 .

[0066] As shown in FIG7 , the distance between the fourth subsegments 1323 of two adjacent test touch signal lines 13 is smaller than the distance between the third subsegments 1321 of two adjacent test touch signal lines 13, and is also smaller than the distance between adjacent third corner segments 1322, the distance between fourth corner segments 1324, and the distance between fifth subsegments 1325. This facilitates positioning the fourth subsegments 1323 of multiple test touch signal lines 13 between adjacent flexible circuit board terminals 12, thereby reducing the number of flexible circuit board terminals 12. Similarly, the distance between the fourth subsegments 1323 of two adjacent test touch signal lines 13 is smaller than the distance between the first segments 131 of two adjacent test touch signal lines 13, and is also smaller than the distance between the third segments 133 of two adjacent test touch signal lines 13.

[0067] As shown in Figures 7 and 8, the orthographic projection of the second segment 132 on the substrate 10 is located between the orthographic projections of some adjacent flexible circuit board terminals 12 on the substrate 10, the second segment 132 and the first segment 131 are arranged on different layers, the second segment 132 and the third segment 133 are arranged on different layers, and the second segment 132 and the flexible circuit board terminal 12 are arranged on different layers. The second segment 132 is electrically connected to the first segment 131 and the third segment 133 through the wire exchange hole respectively.

[0068] In some embodiments, the second section 132 is disposed on a side of the flexible circuit board terminal 12 close to the substrate 10 , so as to prevent the test touch signal line 13 from being crushed when the flexible circuit board is bound.

[0069] In some embodiments, referring to FIG8 and FIG9 , FIG9 is a cross-sectional view along the BB' direction shown in FIG1 , showing that the display panel 1 further includes a substrate 10 and at least one gate metal layer GE, at least one source / drain metal layer SD, and a touch metal layer 116 disposed on the substrate 10. The gate metal layer GE is disposed on the substrate 10, the source / drain metal layer SD is disposed on a side of the gate metal layer GE facing away from the substrate 10, and the touch metal layer 116 is disposed on a side of the source / drain metal layer SD facing away from the substrate 10. The second segment 132 is disposed on the same layer as the gate metal layer GE, a portion of the first segment 131 is disposed on the same layer as the source / drain metal layer SD, and a portion of the third segment 133 is disposed on the same layer as the source / drain metal layer SD.

[0070] In the area between the touch display driver integrated circuit 2 and the flexible circuit board terminal 12, the first section 131 is electrically connected to the integrated circuit output terminal 17. The first section 131 is routed from the touch metal layer 116 through the wiring hole to the source and drain electrode metal layer SD. The first section 131 is routed through the source and drain electrode metal layer SD. At the end of the flexible circuit board terminal 12 close to the touch display driver integrated circuit 2, the first section 131 is connected to the second section 132 through the wiring hole, so that the test touch signal line 13 is routed from the source and drain electrode metal layer SD to the gate metal layer GE. The second section 132 is routed along the second direction Y from the flexible circuit board terminal 12 close to the touch display driver integrated circuit 2. The second segment 132 extends from one end of the flexible circuit board terminal 12 to the end away from the touch display driver integrated circuit 2. In the area between the end of the flexible circuit board terminal 12 close to the touch display driver integrated circuit 2 and the end of the flexible circuit board terminal 12 away from the touch display driver integrated circuit 2, the second segment 132 is routed through the gate metal layer GE and is connected to the third segment 133 through a line change hole at the end of the flexible circuit board terminal 12 away from the touch display driver integrated circuit 2, so that the test touch signal line 13 is routed from the gate metal layer GE to the source and drain electrode metal layer SD. The third segment 133 is routed through the source and drain electrode metal layer SD and extends to be connected to the test terminal 11.

[0071] In one embodiment, the display panel 1 further includes a first gate metal layer GE1 and a second gate metal layer GE2, the second gate metal layer GE1 is arranged on the side of the first gate metal layer GE1 facing away from the substrate 10, the second segment 132 of some test touch signal lines 13 is arranged on the same layer as the first gate metal layer GE1, and the second segment 132 of another part of the test touch signal lines 13 is arranged on the same layer as the second gate metal layer GE2.

[0072] As shown in Figure 9, the display panel 1 specifically includes 10 and a buffer layer 101, a blocking layer 102, an active layer 118, a first insulating layer 103, a first gate metal layer GE1, a second insulating layer 104, a second gate metal layer GE2, a third insulating layer 105, a first source-drain electrode metal layer SD1, a fourth insulating layer 106, a second source-drain electrode metal layer SD2, a fifth insulating layer 107, a third source-drain electrode metal layer SD3, a sixth insulating layer 108, a pixel definition layer 109, an anode 110, a light-emitting layer 111, a cathode 112, an encapsulation layer 113, a seventh insulating layer 114, an eighth insulating layer 115, a touch metal layer 116, and a ninth insulating layer 117, which are stacked on the substrate 10. The end face of the substrate 10 located at the edge of the side of the binding area BA1 away from the display area AA is exposed to the outside of the display panel 1, and the end faces of the buffer layer 101, the blocking layer 102, the first insulating layer 103 and the other insulating layers located at the edge of the side of the binding area BA1 away from the display area AA are all exposed to the outside of the display panel 1. The end face of the other end of the test touch signal line 13 and the end faces of the substrate 10, the buffer layer 101, the blocking layer 102, the first insulating layer 103 and the other insulating layers located at the edge of the side of the binding area BA1 away from the display area AA together define the end face of the display panel 1 located at the edge of the side of the binding area BA1 away from the display area AA.

[0073] As shown in Figures 8 and 9, the flexible circuit board terminal 12 is composed of a first metal layer 121, a second metal layer 122, a third metal layer 123 and a fourth metal layer 124. The first metal layer 121 is arranged on the same layer as the first source and drain electrode metal layer SD1, the second metal layer 122 is arranged on the same layer as the second source and drain electrode metal layer SD2, the third metal layer SD3 is arranged on the same layer as the third source and drain electrode metal layer SD3, and the fourth metal layer 124 is arranged on the same layer as the touch metal layer 116.

[0074] In the area where the flexible circuit board terminal 12 is located, the test touch signal line 13 is divided into two parts, wherein the second section 132 of one part of the test touch signal line 13 is arranged on the same layer as the first gate metal layer GE1, and the second section 132 of the other part of the test touch signal line 13 is arranged on the same layer as the second gate metal layer GE2, that is, one part of the test touch signal line 13 is switched to the first gate metal layer GE1 through the line switching hole, and the other part of the test touch signal line 13 is switched to the second gate metal layer GE2 through the line switching hole.

[0075] In some embodiments, as shown in conjunction with FIG8 and FIG9 , the test touch signal line 13 includes a first test touch signal line 13a and a second test touch signal line 13b. The second segment 132 of the first test touch signal line 13a is disposed on the same layer as the first gate metal layer GE1, and the second segment 132 of the second test touch signal line 13b is disposed on the same layer as the second gate metal layer GE2. Between the orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10, there is at least one second segment 132 of the first test touch signal line 13a and at least one second segment 132 of the second test touch signal line 13b. In this structure, by routing multiple test touch signal lines 13 between two adjacent flexible circuit board terminals 12 on the first gate metal layer GE1 and the second gate metal layer GE2, respectively, the number of test touch signal lines 13 between adjacent flexible circuit board terminals 12 is increased, further reducing the number of flexible circuit board terminals 12.

[0076] In one embodiment, as shown in Figure 8, two first test touch signal lines 13a and two second test touch signal lines 13b are provided between two adjacent flexible circuit board terminals 12, and the orthographic projection of the second segment 132 of the first test touch signal line 13a on the substrate 10 and the orthographic projection of the second segment 132 of the second test touch signal line 13b on the substrate 10 are staggered, that is, the orthographic projection of the second segment 132 of the first test touch signal line 13a on the substrate 10 and the orthographic projection of the second segment 132 of the second test touch signal line 13b on the substrate 10 do not overlap, thereby reducing the parasitic capacitance between the first test touch signal line 13a and the second test touch signal line 13b.

[0077] In combination with Figures 10 and 11, Figure 10 is a schematic diagram of the partial structure of another display module provided by an embodiment of the present application, and Figure 11 is a cross-sectional view along the C-C' direction shown in Figure 10. Its structure is roughly the same as the structure of the display module shown in Figures 3 to 9, with the difference that: the orthographic projections of some line segments of some test touch signal lines 13 on the substrate 10 are located between the orthographic projections of some adjacent flexible circuit board terminals 12 on the substrate 10, and in addition, the orthographic projections of some line segments of some test touch signal lines 13 on the substrate 10 overlap with the orthographic projections of some flexible circuit board terminals 12 on the substrate 10.

[0078] Specifically, the orthographic projection of the second section 132 of part of the test touch signal line 13 on the substrate 10 is located between the orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10, and the orthographic projection of the second section 132 of part of the test touch signal line 13 on the substrate 10 overlaps with the orthographic projection of the flexible circuit board terminal 12 on the substrate 10. That is, the embodiments shown in Figures 10 and 11 can further reduce the number of flexible circuit board terminals 12 by routing the lines between adjacent flexible circuit board terminals 12 and under the flexible circuit board terminals 12.

[0079] In some embodiments, there is an orthographic projection of partial line segments of multiple test touch signal lines 13 on the substrate 10 between the orthographic projections of two adjacent flexible circuit board terminals 12 on the substrate 10, and the orthographic projection of the same flexible circuit board terminal 12 on the substrate 10 overlaps with the orthographic projections of partial line segments of the multiple test touch signal lines 13 on the substrate 10.

[0080] In one embodiment, as shown in FIG10 , four second sections 132 of the test touch signal lines 13 are disposed below a single flexible circuit board terminal 12, and four test touch signal lines 13 are disposed between two adjacent flexible circuit board terminals 12. In actual applications, the number of test touch signal lines 13 disposed below a single flexible circuit board terminal 12 and the number of test touch signal lines disposed between two adjacent flexible circuit board terminals 12 can be set based on actual needs, and can be only one or multiple, and is not limited here.

[0081] In some other embodiments, the test touch signal line 13 can be set only directly below the flexible circuit board terminal 12, that is, no test touch signal line 13 is set between adjacent flexible circuit board terminals 12, which can also achieve the effect of reducing the number of flexible circuit board terminals 12.

[0082] In one embodiment, as shown in FIG4 , the display panel further includes a plurality of floating terminals 14 , which are arranged side by side and spaced apart from the flexible circuit board terminals 12 . The film structure of the floating terminals 14 is the same as that of the flexible circuit board terminals 12 , and the floating terminals 14 are not connected to electrical signals.

[0083] It should be noted that, taking 20 touch transmitting electrodes and 40 touch receiving electrodes as an example, a display panel typically has 60 flexible circuit board terminals. By routing wires between adjacent flexible circuit board terminals, four to five test touch signal lines can be provided between two adjacent flexible circuit board terminals. This reduces the number of flexible circuit board terminals from 60 to 20, and the length of the flexible circuit board can be reduced by approximately 4,000 microns. By routing wires between adjacent flexible circuit board terminals and underneath them simultaneously, the number of flexible circuit board terminals can be reduced from 60 to 10, reducing the length of the flexible circuit board by approximately 5,000 microns. However, this excessive reduction in the number of flexible circuit board terminals can lead to insufficient strength in the area where the flexible circuit board terminals are located, resulting in collapse during binding. By adding floating terminals 14 spaced parallel to the flexible circuit board terminals, the floating terminals 14 provide support, increasing the strength of the area where the flexible circuit board terminals are located and preventing collapse during binding.

[0084] Based on the display panel provided in the above embodiments of the present application, the embodiments of the present application also provide a display device, as shown in Figure 12. Figure 12 is a structural schematic diagram of the display device provided in the embodiments of the present application. The display device includes a frame 200 and a display module 100. The display module 100 is arranged on the frame 200. The display module 100 can be a display module provided in any of the above embodiments. The display device can be but is not limited to display devices such as smart phones, smart watches, desktop computers, laptops, and televisions.

[0085] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display module, which includes a display panel and a touch display driver integrated circuit. The display panel includes a substrate and multiple touch electrodes, multiple flexible circuit board terminals and multiple test touch signal lines arranged on the substrate. The touch display driver integrated circuit is electrically connected to the touch electrodes. By electrically connecting one end of the test touch signal line to the touch display driver integrated circuit, the other end of the test touch signal line extends to the edge of the display panel on the side of the binding area away from the display area through one side of the flexible circuit board terminal in the thickness direction or at least one side in the direction perpendicular to the thickness direction. The test touch signal line does not need to be connected to the flexible circuit board terminal, so the number of flexible circuit board terminals can be reduced.

[0086] In summary, although the present application is disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A display module, comprising: A display panel includes a display area and a binding area disposed on one side of the display area. The display panel also includes a substrate and a plurality of touch electrodes, a plurality of flexible circuit board terminals, and a plurality of test touch signal lines disposed on the substrate. The touch electrodes are disposed in the display area, the flexible circuit board terminals and the test touch signal lines are both disposed in the binding area, and the flexible circuit board terminals are used for externally connecting to a flexible circuit board. A touch display driver integrated circuit is disposed in the binding area, and the touch display driver integrated circuit is electrically connected to the touch electrodes; In which, the flexible circuit board terminal is arranged on a side of the touch display driver integrated circuit away from the display area, one end of the test touch signal line is electrically connected to the touch display driver integrated circuit, and the other end of the test touch signal line extends through one side of the flexible circuit board terminal in the thickness direction or at least one side in the direction perpendicular to the thickness direction to the edge of the display panel located on the side of the binding area away from the display area, and the end face of the other end of the test touch signal line is exposed to the outside of the display panel.

2. The display module according to claim 1, wherein: Orthographic projections of at least some segments of the test touch signal lines on the substrate are located between orthographic projections of some adjacent flexible circuit board terminals on the substrate.

3. The display module according to claim 2, wherein: The orthographic projections of partial line segments of a plurality of test touch signal lines on the substrate are located between the orthographic projections of two adjacent flexible circuit board terminals on the substrate.

4. The display module according to claim 2, wherein: The orthographic projections of some line segments of some of the test touch signal lines on the substrate are located between the orthographic projections of some adjacent flexible circuit board terminals on the substrate, and the orthographic projections of some line segments of some of the test touch signal lines on the substrate overlap with the orthographic projections of some of the flexible circuit board terminals on the substrate.

5. The display module according to claim 4, wherein: There is an orthographic projection of partial line segments of multiple test touch signal lines on the substrate between the orthographic projections of two adjacent flexible circuit board terminals on the substrate, and the orthographic projection of the same flexible circuit board terminal on the substrate overlaps with the orthographic projection of partial line segments of multiple test touch signal lines on the substrate.

6. The display module according to claim 2, wherein: The test touch signal line includes a first section and a second section connected to the first section, wherein the first section is provided on a side of the flexible circuit board terminal close to the touch display driver integrated circuit; Among them, the orthographic projection of the second segment on the substrate is located between the orthographic projections of some adjacent flexible circuit board terminals on the substrate or overlaps with the orthographic projections of some flexible circuit board terminals on the substrate, the second segment is arranged on a different layer from the first segment, and the second segment is arranged on a different layer from the flexible circuit board terminals.

7. The display module according to claim 6, wherein: The display panel further includes at least one gate metal layer and at least one source / drain electrode metal layer, wherein the gate metal layer is disposed on the substrate, and the source / drain electrode metal layer is disposed on a side of the gate metal layer away from the substrate; The second segment is provided in the same layer as the gate metal layer, and part of the line segments of the first segment is provided in the same layer as the source-drain electrode metal layer.

8. The display module according to claim 7, wherein: The display panel further includes a first gate metal layer and a second gate metal layer, wherein the second gate metal layer is disposed on a side of the first gate metal layer facing away from the substrate; Part of the second sections of the test touch signal lines are provided on the same layer as the first gate metal layer, and another part of the second sections of the test touch signal lines are provided on the same layer as the second gate metal layer.

9. The display module according to claim 8, wherein: The test touch signal line includes a first test touch signal line and a second test touch signal line, the second segment of the first test touch signal line is provided in the same layer as the first gate metal layer, the second segment of the second test touch signal line is provided in the same layer as the second gate metal layer, and at least one second segment of the first test touch signal line and at least one second segment of the second test touch signal line are located between orthographic projections of two adjacent flexible circuit board terminals on the substrate; The orthographic projection of the second section of the first test touch signal line on the substrate and the orthographic projection of the second section of the second test touch signal line on the substrate are staggered.

10. The display module according to claim 1, wherein: The display panel further includes a plurality of floating terminals, and the floating terminals are arranged side by side with the flexible circuit board terminals and spaced apart from each other.

11. A display device, comprising a frame and a display module, wherein the display module is disposed on the frame, and the display module comprises: A display panel includes a display area and a binding area disposed on one side of the display area. The display panel also includes a substrate and a plurality of touch electrodes, a plurality of flexible circuit board terminals, and a plurality of test touch signal lines disposed on the substrate. The touch electrodes are disposed in the display area, the flexible circuit board terminals and the test touch signal lines are both disposed in the binding area, and the flexible circuit board terminals are used for externally connecting to a flexible circuit board. A touch display driver integrated circuit is disposed in the binding area, and the touch display driver integrated circuit is electrically connected to the touch electrodes; In which, the flexible circuit board terminal is arranged on a side of the touch display driver integrated circuit away from the display area, one end of the test touch signal line is electrically connected to the touch display driver integrated circuit, and the other end of the test touch signal line extends through one side of the flexible circuit board terminal in the thickness direction or at least one side in the direction perpendicular to the thickness direction to the edge of the display panel located on the side of the binding area away from the display area, and the end face of the other end of the test touch signal line is exposed to the outside of the display panel.

12. The display device according to claim 11, wherein Orthographic projections of at least some segments of the test touch signal lines on the substrate are located between orthographic projections of some adjacent flexible circuit board terminals on the substrate.

13. The display device according to claim 12, wherein: The orthographic projections of partial line segments of a plurality of test touch signal lines on the substrate are located between the orthographic projections of two adjacent flexible circuit board terminals on the substrate.

14. The display device according to claim 12, wherein: The orthographic projections of some line segments of some of the test touch signal lines on the substrate are located between the orthographic projections of some adjacent flexible circuit board terminals on the substrate, and the orthographic projections of some line segments of some of the test touch signal lines on the substrate overlap with the orthographic projections of some of the flexible circuit board terminals on the substrate.

15. The display device according to claim 14, wherein There is an orthographic projection of partial line segments of multiple test touch signal lines on the substrate between the orthographic projections of two adjacent flexible circuit board terminals on the substrate, and the orthographic projection of the same flexible circuit board terminal on the substrate overlaps with the orthographic projection of partial line segments of multiple test touch signal lines on the substrate.

16. The display device according to claim 12, wherein: The test touch signal line includes a first section and a second section connected to the first section, wherein the first section is provided on a side of the flexible circuit board terminal close to the touch display driver integrated circuit; Among them, the orthographic projection of the second segment on the substrate is located between the orthographic projections of some adjacent flexible circuit board terminals on the substrate or overlaps with the orthographic projections of some flexible circuit board terminals on the substrate, the second segment is arranged on a different layer from the first segment, and the second segment is arranged on a different layer from the flexible circuit board terminals.

17. The display device according to claim 16, wherein: The display panel further includes at least one gate metal layer and at least one source / drain electrode metal layer, wherein the gate metal layer is disposed on the substrate, and the source / drain electrode metal layer is disposed on a side of the gate metal layer away from the substrate; The second segment is provided in the same layer as the gate metal layer, and part of the line segments of the first segment is provided in the same layer as the source-drain electrode metal layer.

18. The display device according to claim 17, wherein: The display panel further includes a first gate metal layer and a second gate metal layer, wherein the second gate metal layer is disposed on a side of the first gate metal layer facing away from the substrate; Part of the second sections of the test touch signal lines are provided on the same layer as the first gate metal layer, and another part of the second sections of the test touch signal lines are provided on the same layer as the second gate metal layer.

19. The display device according to claim 18, wherein: The test touch signal line includes a first test touch signal line and a second test touch signal line, the second segment of the first test touch signal line is provided in the same layer as the first gate metal layer, the second segment of the second test touch signal line is provided in the same layer as the second gate metal layer, and at least one second segment of the first test touch signal line and at least one second segment of the second test touch signal line are located between orthographic projections of two adjacent flexible circuit board terminals on the substrate; The orthographic projection of the second section of the first test touch signal line on the substrate and the orthographic projection of the second section of the second test touch signal line on the substrate are staggered.

20. The display device according to claim 11, wherein The display panel further includes a plurality of floating terminals, and the floating terminals are arranged side by side with the flexible circuit board terminals and spaced apart from each other.

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