Display module and display device

Abstract

The embodiment of the utility model provides a display module and a display device, relates to the technical field of display, and aims to improve the production yield of the display device. The display module comprises a display panel, a first flexible circuit board and a second flexible circuit board. The display panel comprises a first binding electrode part and a second binding electrode part, the first binding electrode part comprises a first electrode and a first redundant electrode, and the second binding electrode part comprises a second electrode and a second redundant electrode. The first flexible circuit board comprises a first binding pin part, the first binding pin part comprises a first pin and a first identification area, and the first redundant electrode is located in the first identification area. The second flexible circuit board comprises a second binding pin part, the second binding pin part comprises a second pin and a second identification area, and the second redundant electrode is located in the second identification area. Wherein at least one of the number, the shape and the position of the first identification area is different from that of the second identification area. The display module is used for the display device.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a display module and a display device. BACKGROUND

[0002] With the development of display technology, display devices have gradually spread in people's lives. Among them, liquid crystal display devices (LCD) have been more and more widely used due to their low power consumption, thinness, soft picture and other advantages. At present, the liquid crystal display device includes a display panel, a driving circuit board and a plurality of flexible circuit boards. In the production process of the liquid crystal display device, the plurality of flexible circuit boards may be incorrectly connected to the display panel, resulting in a decrease in production yield. CONTENT OF THE INVENTION

[0003] The present disclosure provides a display module and a display device to improve the production yield of the display device.

[0004] In one aspect, a display module is provided, including a display panel, a first flexible circuit board and a second flexible circuit board. The display panel includes a first binding electrode part and a second binding electrode part. The first binding electrode part includes a plurality of first electrodes and a first redundant electrode arranged at intervals, the first redundant electrode being located between two adjacent first electrodes. The second binding electrode part includes a plurality of second electrodes and a second redundant electrode arranged at intervals, the second redundant electrode being located between two adjacent second electrodes.

[0005] The first flexible circuit board includes a first binding pin part, the first binding pin part including a plurality of first pins and at least one first identification area arranged at intervals, the first identification area being located between two adjacent first pins. A plurality of the first pins are connected to a plurality of the first electrodes, and the first redundant electrode is located in the first identification area.

[0006] The second flexible circuit board includes a second binding pin part, the second binding pin part including a plurality of second pins and at least one second identification area arranged at intervals, the second identification area being located between two adjacent second pins. A plurality of the second pins are connected to a plurality of the second electrodes, and the second redundant electrode is located in the second identification area. Wherein, at least one of the number, shape and position of the first identification area and the second identification area is different.

[0007] Based on this, an automated optical inspection (AOI) device can be used to capture images of the first flexible circuit board and the second flexible circuit board on the surface away from the display panel at the identification position, and determine whether the first flexible circuit board and the second flexible circuit board are correctly connected to the corresponding binding electrode part according to whether the first flexible circuit board and the second flexible circuit board meet the corresponding preset conditions. In this way, it can be determined whether the first flexible circuit board and the second flexible circuit board are incorrectly connected to the corresponding binding electrode part in a timely manner, thereby avoiding the flow of defective products into the subsequent process, improving product yield, and reducing production costs.

[0008] In some embodiments, the number of the second redundant electrodes located in the second identification area is different from the number of the first redundant electrodes located in the first identification area.

[0009] In some embodiments, the number of the second pins on the side of the second identification area close to the first binding electrode part is different from the number of the first pins on the side of the first identification area away from the second binding electrode part.

[0010] In some embodiments, the first binding electrode part further includes a third redundant electrode, and the third redundant electrode is located at the same position as the second redundant electrode in the second binding electrode part. The first pin is connected to the third redundant electrode. The second binding electrode part further includes a fourth redundant electrode, and the fourth redundant electrode is located at the same position as the first redundant electrode in the first binding electrode part. The second pin is connected to the fourth redundant electrode.

[0011] In some embodiments, the positions of the plurality of first electrodes in the first binding electrode part are the same as the positions of the plurality of second electrodes in the second binding electrode part.

[0012] In some embodiments, the distance between the first pins on both sides of the first identification area is greater than the distance between two adjacent first pins. And / or, the distance between the second pins on both sides of the second identification area is greater than the distance between two adjacent second pins.

[0013] In some embodiments, the display panel includes opposite light-out side and light-in side. The display module further includes a first reflective sheet, a light guide plate, an optical film sheet and a light source. The first reflective sheet is arranged at the light-in side of the display panel, the light guide plate is arranged between the display panel and the first reflective sheet, and the optical film sheet is arranged between the display panel and the light guide plate. The light source is arranged at the side of the light guide plate and between the first reflective sheet and the optical film sheet. In the first direction, the length of the first reflective sheet is greater than the length of the light guide plate. The first direction is perpendicular to the second direction and parallel to the plane where the light guide plate is located. The second direction is the direction in which the light source points to the light guide plate.

[0014] In some embodiments, the light guide plate is provided with a first positioning column arranged at the surface of the light guide plate away from the first reflective sheet. The optical film sheet includes a film sheet body and a lug arranged at the circumferential side of the film sheet body. The optical film sheet is provided with a first positioning hole, at least part of which is located in the lug, and the first positioning hole is sleeved on the first positioning column.

[0015] In some embodiments, in the first direction, the distance between the first positioning column and the edge of the first positioning hole is greater than or equal to a preset value. The preset value is P, P=(L×α×ΔT×100000+s) / 2; wherein L is the length of the optical film sheet, α is the linear expansion coefficient, ΔT is the temperature difference, and s is the tolerance. In the second direction, the distance between the first positioning column and the edge of the first positioning hole is less than or equal to 0.1 mm.

[0016] In some embodiments, the light guide plate has a first center line extending in the second direction, the light guide plate is provided with a second positioning column arranged at the surface of the light guide plate away from the first reflective sheet and symmetric about the first center line. The optical film sheet is provided with a second positioning hole sleeved on the second positioning column. In the first direction, the distance between the second positioning column and the edge of the second positioning hole is less than or equal to 0.1 mm.

[0017] In some embodiments, the display module further includes a second reflective sheet arranged at the circumferential side of the light guide plate, and the two ends of the second reflective sheet have gaps between the optical film sheet and the first reflective sheet.

[0018] In another aspect, a display device is provided. The display device includes the display module as described in the above embodiments. The display device further includes a back plate having a mounting cavity, and the display module is arranged in the mounting cavity.

[0019] In some embodiments, the backplate includes a base plate disposed on the side of the first reflective sheet away from the light guide plate. The base plate includes a first portion and a second portion, wherein the distance between the surface of the second portion away from the first reflective sheet and the first reflective sheet is greater than the distance between the surface of the first portion away from the first reflective sheet and the first reflective sheet, and a first groove is provided on the side of the second portion near the first reflective sheet. The display module further includes a protective pad disposed between the first reflective sheet and the second portion, and the protective pad covers the first groove.

[0020] In some embodiments, the protective pad is provided with a first gap, the orthographic projection of the first gap on the base plate being within the range of the orthographic projection of the first groove on the base plate.

[0021] The above-described display device has the same structure and beneficial technical effects as the display module provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0023] Figure 1 This is a structural diagram of a display device according to some embodiments;

[0024] Figure 2 for Figure 1 A sectional view along section line AA;

[0025] Figure 3 This is a partial enlarged view of a display device according to some embodiments;

[0026] Figure 4 This is a structural diagram of a display panel, a first flexible circuit board, a second flexible circuit board, and a driving circuit according to some embodiments;

[0027] Figure 5 This is a structural diagram of a display panel with a bonding electrode portion and a bonding pin portion according to some embodiments;

[0028] Figure 6 This is a structural diagram of a display panel, a first flexible circuit board, and a second flexible circuit board according to some embodiments;

[0029] Figure 7 A structural diagram of a display panel, a first flexible circuit board and a second flexible circuit board according to some embodiments;

[0030] Figure 8 A structural diagram of a display panel, a first flexible circuit board and a second flexible circuit board according to some embodiments;

[0031] Figure 9 A structural diagram of a display panel, a first flexible circuit board, a second flexible circuit board, a third flexible circuit board and a driving circuit according to some embodiments;

[0032] Figure 10 A structural diagram of a display panel, a first flexible circuit board, a second flexible circuit board, a third flexible circuit board according to some embodiments;

[0033] Figure 11 A structural diagram of a display panel, a first flexible circuit board, a second flexible circuit board, a third flexible circuit board according to some embodiments; Figure 1 A sectional view along section line B-B in FIG. 1;

[0034] Figure 12 A structural diagram of an optical film and a light guide plate according to some embodiments;

[0035] Figure 13 A partial enlarged view of a display device according to some embodiments;

[0036] Figure 14 A structural diagram of a bottom plate and a protective pad according to some embodiments. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings. It should be apparent that the described embodiments are only a part of the embodiments of the present disclosure, and not all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0038] Unless otherwise required by context, as used herein the terms "comprise", "comprises", "comprising", "include", "includes", "including", "contain", "contains", "containing", "characterized by" and the like are to be construed in an open, inclusive and non-limiting sense; that is, as "comprising". As used herein in the description of embodiments and the appended claims, the terms "a", "an" and "the" are used generically to refer to one or more instances of the thing to which the terms refer. As used herein in the description of embodiments and the appended claims, the term "units" or "units of" means one or more.

[0039] Hereinafter, the terms "first", "second", etc. are used only for the purpose of description, and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "plurality" is two or more, unless otherwise specified.

[0040] In describing some embodiments, the term "connected" and / or variants thereof are used. The term "connected" is used in a broad sense, for example, "connected" can be mechanical connection, can be electrical connection; can be fixed connection, can be detachable connection, or integral connection; can be directly connected, can be indirectly connected through an intermediate medium, or can be internal connection of two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in this text can be understood according to the specific circumstances.

[0041] "A, B and C at least one of them" has the same meaning as "at least one of A, B or C", which includes the following combinations of A, B and C: only A, only B, only C, combination of A and B, combination of A and C, combination of B and C, and combination of A, B and C.

[0042] "A and / or B" includes the following three combinations: only A, only B, and combination of A and B.

[0043] As used herein, "about," "substantially" or "approximately" includes the exact stated value as well as amounts within an acceptable range of deviation of the stated value, as determined by one of ordinary skill in the art considering the measurement at issue and the error in measuring the particular quantity (i.e., the limitations inherent in any measuring system).

[0044] As used herein, "parallel," "perpendicular," "equal" includes the stated condition as well as conditions that approximate the stated condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art considering the measurement at issue and the error in measuring the particular quantity (i.e., the limitations inherent in any measuring system). For example, "parallel" includes absolute parallel and near parallel, where near parallel can have an acceptable range of deviation of, for example, within 5°; "perpendicular" includes absolute perpendicular and near perpendicular, where near perpendicular can also have an acceptable range of deviation of, for example, within 5°. "Equal" includes absolute equality and near equality, where near equality can have an acceptable range of deviation of, for example, a difference between the two that is less than or equal to 5% of either.

[0045] In the present disclosure, terms such as "lower," "bottom," "upper," and "top" are used to describe the relative relationship of components shown in the drawings. The terms can be relative concepts and described based on the direction represented in the drawings, or based on the order of process steps formed, but are not limited thereto.

[0046] It is understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present.

[0047] The term "opposite" means that a first element can be directly or indirectly opposite a second element. In the case where a third element is interposed between the first element and the second element, the first element and the second element can be understood to be indirectly opposite each other, although still opposite each other.

[0048] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations that are idealized examples of exemplary embodiments. In the drawings, the thickness of layers and regions are exaggerated for clarity. Accordingly, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, exemplary embodiments should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region illustrated as a rectangle will typically have rounded or curved features. Thus, the regions illustrated in the drawings are schematic and their shapes are not intended to illustrate the precise shape of a region of a device and are not intended to limit the exemplary embodiments to a precise geometric shape.

[0049] Referring to Figure 1 Embodiments of the present disclosure provide a display device 1000, which is a product having an image display function. Exemplarily, the display device 1000 can be any device that displays images whether moving (e.g., video) or fixed (e.g., still image) and whether text or image.

[0050] Exemplarily, the display device 1000 can be a television, a notebook computer, a tablet computer, a display panel of a camera view (e.g., a display panel of a rearview camera in a vehicle), a vehicle display panel, a flight display panel, or any product or component having a display function.

[0051] In some embodiments, the display device 1000 can be a liquid crystal display (LCD) in terms of the light-emitting type of the display device 1000. The display device 1000 can be a flat display device or a curved display device, etc. in terms of the form of the display device 1000. The display device 1000 can be rectangular, circular, or any other shape in terms of the shape of the display device 1000. In the following, some embodiments of the present disclosure are schematically described by taking a rectangular and flat liquid crystal display device as an example, but the embodiments of the present disclosure are not limited thereto, and any other display device can also be considered as long as the same technical idea is applied.

[0052] In some embodiments, as shown in Figure 2 , the display device 1000 includes a display module 100 and a backboard 200. The backboard 200 has a mounting cavity, and the display module 100 is arranged in the mounting cavity.

[0053] Exemplarily, the backboard 200 can be a box-shaped structure having an opening, and the backboard 200 includes a bottom plate 210 and a side plate 220 arranged around the periphery of the bottom plate 210, and the bottom plate 210 and the side plate 220 form the mounting cavity.

[0054] In some embodiments, as shown in Figure 2 , the display module 100 includes a display panel 10, a first reflective sheet 50, a light guide plate 60, an optical film sheet 70, and a light source 80.

[0055] As shown in Figure 2 , the display panel 10 includes an opposite light-out side 10A and a light-in side 10B. The light-out side 10A refers to a side (the upper side of the display panel 10 in Figure 2 ) on which the display panel 10 can emit light, and the light-in side 10B refers to the other side (the lower side of the display panel 10 in Figure 2 ) opposite to the light-out side 10A.

[0056] As shown in Figure 2 , the first reflective sheet 50 is arranged on the light-incoming side 10B of the display panel 10, for improving the brightness and light-emitting uniformity of the display device 1000. The light guide plate 60 is arranged between the display panel 10 and the first reflective sheet 50, for converting the point light source or the line light source into a surface light source. The optical film sheet 70 is arranged between the display panel 10 and the light guide plate 60, for performing modulation processing on the wavelength and / or the propagation direction of the light. The light source 80 is arranged on the side of the light guide plate 60, between the first reflective sheet 50 and the optical film sheet 70, for providing light for the light guide plate 60.

[0057] As shown in Figure 3 , the optical film sheet 70 can include, for example, a diffusion sheet 75, a brightness enhancement film (BEF) 76, and a dual brightness enhancement film (DBEF) 77. The diffusion sheet 75, the brightness enhancement film 76, and the dual brightness enhancement film 77 are arranged on the light guide plate 60 in a direction away from the light guide plate 60 in sequence.

[0058] In some examples, as shown in Figure 2 , the display panel 10 includes an array substrate 1, a counter substrate 2, and a liquid crystal layer 3 arranged between the array substrate 1 and the counter substrate 2. The array substrate 1 and the counter substrate 2 are bonded together by a sealant, so as to confine the liquid crystal layer 3 in an area surrounded by the sealant.

[0059] In some embodiments, as shown in Figure 2 , the display device 1000 further includes a front frame 300 arranged between the display panel 10 and the optical film sheet 70, and one end of the front frame 300 is lapped on the side plate 220, so as to fix the display panel 10 and the first reflective sheet 50, the light guide plate 60, and the optical film sheet 70.

[0060] In some embodiments, as shown in Figure 2 , the display device 1000 further includes a light-blocking ink 310 arranged on the surface of the front frame 300 close to the optical film sheet 70, and located in the edge area of the front frame 300 close to the side plate 220, so as to prevent light from leaking out from the non-display area.

[0061] In some embodiments, as shown in Figure 4 , the display module 100 further includes a plurality of flexible circuit boards 500 and a driving circuit board 400. The driving circuit board 400 can be connected to the display panel 10 through the plurality of flexible circuit boards 500.

[0062] In some embodiments, as shown in Figure 4 , the display module 100 further includes a plurality of flexible circuit boards 500 and a driving circuit board 400. The driving circuit board 400 can be connected to the display panel 10 through the plurality of flexible circuit boards 500.As shown, the driving circuit board 400 can be provided with an interface 410, for example, for connecting with other external devices to provide control signals and power support for the display device 1000.

[0063] In some examples, as shown in FIG. 1, the display panel 10 can be provided with a plurality of binding electrode parts 110 and a plurality of signal lines 120. Figure 4 and Figure 5 As shown, the display panel 10 includes a plurality of binding electrode parts 110 and a plurality of signal lines 120, the binding electrode part 110 includes a plurality of binding electrodes 130 arranged at intervals, and the plurality of binding electrodes 130 are arranged in a row. Wherein, one signal line 120 is connected with one binding electrode 130, or one signal line 120 is connected with a plurality of binding electrodes 130, and the plurality of binding electrodes 130 connected with the same signal line 120 can be connected near the end of the signal line 120 to form an integrated structure.

[0064] And the flexible circuit board 500 includes a binding pin part 510, the binding pin part 510 includes a plurality of binding pins 520 arranged at intervals, and the plurality of binding pins 520 are arranged in a row. At this time, the plurality of binding pins 520 of the binding pin part 510 of the plurality of flexible circuit boards 500 can be connected with the plurality of binding electrodes 130 of the plurality of binding electrode parts 110 of the display panel 10 through anisotropic conductive film (ACF) to connect the driving circuit board 400 with the display panel 10, thereby providing display signals to the display panel 10.

[0065] However, in the related art, in the process of connecting the binding pin part of the plurality of flexible circuit boards with the plurality of binding electrode parts of the display panel, one or more flexible circuit boards can be connected with the wrong binding electrode part, and in the subsequent process of the lighting test, it is found that the display panel has abnormal display or cannot display, resulting in a decrease in production yield.

[0066] Based on this, as shown in FIG. 1, the display module 100 provided by the embodiments of the present disclosure includes a plurality of binding electrode parts 110, and the plurality of binding electrode parts 110 includes a first binding electrode part 11 and a second binding electrode part 12. Figure 4 As shown, the plurality of binding electrodes 130 of the first binding electrode part 11 includes a plurality of first electrodes 111 and a first redundant electrode 112 arranged at intervals, and the first redundant electrode 112 is located between two adjacent first electrodes 111. The plurality of binding electrodes 130 of the second binding electrode part 12 includes a plurality of second electrodes 121 and a second redundant electrode 122 arranged at intervals, and the second redundant electrode 122 is located between two adjacent second electrodes 121.

[0067] The width of the first redundant electrode 112 can be equal to the width of the first electrode 111, for example. The width of the second redundant electrode 122 can be equal to the width of the second electrode 121, for example. The first redundant electrode 112 and the second redundant electrode 122 are floating, which means that the first redundant electrode 112 and the second redundant electrode 122 are not connected to any other electronic elements or circuit structures, and are not used to receive or transmit any electrical signals.

[0068] On this basis, the plurality of flexible circuit boards 500 includes a first flexible circuit board 20 and a second flexible circuit board 30. The first flexible circuit board 20 includes a first binding pin portion 21 connected to the first binding electrode portion 11. The second flexible circuit board 30 includes a second binding pin portion 31 connected to the second binding electrode portion 12.

[0069] As shown in Figure 5 , Figure 6 , Figure 7 and Figure 8 , the first binding pin portion 21 includes a plurality of first pins 211 arranged at intervals and at least one first identification area 212 located between two adjacent first pins 211. The plurality of first pins 211 are connected to the plurality of first electrodes 111, and the first redundant electrode 112 is located in the first identification area 212.

[0070] In this way, after the first binding pin portion 21 is connected to the first binding electrode portion 11, the pressure between the first electrode 111 and the first pin 211 is large, so that the outer insulating film of the conductive particles in the ACF is broken, realizing the electrical connection between the first electrode 111 and the first pin 211, and causing the surface of the first flexible circuit board 20 away from the first pin 211 to have uneven indentations. Since the first identification area 212 does not have the first pin 211, the outer insulating film of the conductive particles in the ACF between the first redundant electrode 112 and the first identification area 212 cannot be broken, and the surface of the first flexible circuit board 20 away from the first redundant electrode 112 (i.e., the surface of the first identification area 212) is a planar structure.

[0071] The first identification area 212 can be pre-set, i.e., the area between the two first pins 211 designated in the first flexible circuit board 20 can be used as the first identification area 212. The distance between the first pins 211 on both sides of the first identification area 212 is greater than the distance between two adjacent first pins 211.

[0072] As shown in Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the second binding pin part 31 includes a plurality of second pins 311 arranged at intervals and at least one second identification area 312 located between two adjacent second pins 311. The plurality of second pins 311 are connected with the plurality of second electrodes 121, and the second redundant electrode 122 is located in the second identification area 312.

[0073] In this way, after the second binding pin part 31 is connected with the second binding electrode part 12, the pressure between the second electrode 121 and the second pin 311 is large, so that the anisotropic conductive adhesive film is broken, realizing the electrical connection between the second electrode 121 and the second pin 311, and causing the surface of the second flexible circuit board 30 away from the second pin 311 to have uneven indentations. Since the second identification area 312 is free of the second pin 311, the anisotropic conductive adhesive film between the second redundant electrode 122 and the second identification area 312 cannot be broken, and the surface of the second flexible circuit board 30 away from the second redundant electrode 122 (i.e., the surface of the second identification area 312) is a planar structure.

[0074] The above-mentioned second identification area 312 can be pre-set, i.e., the area between the two second pins 311 designated in the second flexible circuit board 30 can be set as the second identification area 312. The distance between the second pins 311 on both sides of the second identification area 312 is greater than the distance between two adjacent second pins 311.

[0075] In addition, at least one of the number, shape and position of the first identification area 212 and the second identification area 312 is different. In this case, after the first binding pin part 21 is connected with the second binding electrode part 12, at least one second redundant electrode 122 will be connected with the first pin 211, causing uneven indentations to exist on the surface of the second binding electrode part 12 away from the display panel 10 in the area where the second redundant electrode 122 is located. After the second binding pin part 31 is connected with the first binding electrode part 11, at least one first redundant electrode 112 will be connected with the second pin 311, causing uneven indentations to exist on the surface of the first binding electrode part 11 away from the display panel 10 in the area where the first redundant electrode 112 is located.

[0076] Based on this, the image of the first flexible circuit board 20 and the second flexible circuit board 30 on the surface away from the display panel 10 and located at the identification position can be collected by using an automated optical inspection (AOI) device. Whether the first flexible circuit board 20 and the second flexible circuit board 30 are correctly connected to the corresponding binding electrode part can be determined according to whether the first flexible circuit board 20 and the second flexible circuit board 30 meet the corresponding preset conditions. For details, please refer to the following. In this way, it can be determined whether the first flexible circuit board 20 and the second flexible circuit board 30 are incorrectly connected to the corresponding binding electrode part in time, so as to avoid the defective products from flowing into the subsequent process, improve the product yield, and reduce the preparation cost.

[0077] In some embodiments, as shown in FIG. 1, the first binding electrode part 11 includes a first redundant electrode 112, and the second binding electrode part 12 includes a second redundant electrode 122. The first redundant electrode 112 and the second redundant electrode 122 are located at the same position of the display panel 10. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first pin 211 and the second pin 311, respectively. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first electrode 111 and the second electrode 121, respectively.

[0078] In some embodiments, as shown in FIG. 1, the first binding electrode part 11 includes a first redundant electrode 112, and the second binding electrode part 12 includes a second redundant electrode 122. The first redundant electrode 112 and the second redundant electrode 122 are located at the same position of the display panel 10. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first pin 211 and the second pin 311, respectively. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first electrode 111 and the second electrode 121, respectively. Figure 5 Figure 6 Figure 7 Figure 8 In some embodiments, as shown in FIG. 1, the first binding electrode part 11 includes a first redundant electrode 112, and the second binding electrode part 12 includes a second redundant electrode 122. The first redundant electrode 112 and the second redundant electrode 122 are located at the same position of the display panel 10. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first pin 211 and the second pin 311, respectively. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first electrode 111 and the second electrode 121, respectively.

[0079] At this time, the number of the binding electrodes 130 (including the first electrode 111 and the first redundant electrode 112) in the first binding electrode part 11 and the number of the binding electrodes 130 (including the second electrode 121 and the second redundant electrode 122) in the second binding electrode part 12 are the same, and the distribution of the binding electrodes 130 in the first binding electrode part 11 and the second binding electrode part 12 is the same, so that the structures of the first binding electrode part 11 and the second binding electrode part 12 are consistent, and the display panel 10 can be prepared under the same process, which is beneficial to improving the production efficiency of the display panel 10.

[0080] In some embodiments, as shown in FIG. 1, the first binding electrode part 11 includes a first redundant electrode 112, and the second binding electrode part 12 includes a second redundant electrode 122. The first redundant electrode 112 and the second redundant electrode 122 are located at the same position of the display panel 10. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first pin 211 and the second pin 311, respectively. The first redundant electrode 112 and the second redundant electrode 122 are connected to the first electrode 111 and the second electrode 121, respectively. Figure 6 ​​​As shown, the number of the second pins 311 on the side of the second identification area 312 close to the first binding electrode part 11 is different from the number of the first pins 211 on the side of the first identification area 212 away from the second binding electrode part 12. For example, the number of the second pins 311 on the side of the second identification area 312 close to the first binding electrode part 11 is 13, and the number of the first pins 211 on the side of the first identification area 212 away from the second binding electrode part 12 is 3.

[0081] At this time, the identification position includes a first identification position and a second identification position. The first identification position refers to the position of the first redundant electrode 112 and the third redundant electrode 113 on the surface of the flexible circuit board away from the display panel 10 and connected to the first binding electrode part 11. The second identification position refers to the position of the second redundant electrode 122 and the fourth redundant electrode 123 on the surface of the flexible circuit board away from the display panel 10 and connected to the second binding electrode part 12.

[0082] By collecting the images of the first identification position and the second identification position, in the case that there is a concave-convex indentation on the position of the first redundant electrode 112 on the first identification position, and the position of the third redundant electrode 113 is a flat structure, that is, the first flexible circuit board 20 is not connected to the first binding electrode part 11, the first flexible circuit board 20 is connected to the second binding electrode part 12, and the connection relationship of the first flexible circuit board 20 is wrong; in the case that there is a concave-convex indentation on the position of the second redundant electrode 122 on the second identification position, and the position of the fourth redundant electrode 123 is a flat structure, that is, the second flexible circuit board 30 is not connected to the second binding electrode part 12, the second flexible circuit board 30 is connected to the first binding electrode part 11, and the connection relationship of the second flexible circuit board 30 is wrong. Therefore, by judging whether the connection relationship of the first flexible circuit board 20 and the second flexible circuit board 30 with the display panel 10 is correct, the product yield is improved, and the production cost is reduced.

[0083] In some embodiments, as shown in FIG. 2, the first identification area 212 is located on the side of the first binding electrode part 11 away from the display panel 10, and the second identification area 312 is located on the side of the second binding electrode part 12 close to the display panel 10. Figure 7 As shown, the number of the second redundant electrode 122 located in the second identification area 312 is different from the number of the first redundant electrode 112 located in the first identification area 212. For example, the number of the first redundant electrode 112 located in the first identification area 212 is 1, and the number of the second redundant electrode 122 located in the second identification area 312 is 2.

[0084] At this time, the identification position includes a first identification position and a second identification position. The first identification position refers to the position on the surface of the flexible circuit board connected to the first bonding electrode part 11 that is away from the display panel 10, located at the location of the first redundant electrode 112 and the third redundant electrode 113. The second identification position refers to the position on the surface of the flexible circuit board connected to the second bonding electrode part 12 that is away from the display panel 10, located at the location of the second redundant electrode 122 / fourth redundant electrode 123.

[0085] By acquiring images of the first and second identification positions, if the locations of the first redundant electrode 112 and the third redundant electrode 113 at the first identification position are planar, it indicates that the first flexible circuit board 20 is not connected to the first bonding electrode portion 11, but is connected to the second bonding electrode portion 12, indicating an incorrect connection relationship for the first flexible circuit board 20. Similarly, if a portion of the location of the second redundant electrode 122 / fourth redundant electrode 123 at the second identification position is planar, and another portion has uneven indentations, it indicates that the second flexible circuit board 30 is not connected to the second bonding electrode portion 12, but is connected to the first bonding electrode portion 11, indicating an incorrect connection relationship for the second flexible circuit board 30. Therefore, by determining whether the connection relationship between the first flexible circuit board 20 and the second flexible circuit board 30 and the display panel 10 is correct, product yield can be improved and production costs reduced.

[0086] In some embodiments, such as Figure 8 As shown, the number of the first identification area 212 and the second identification area 312 are different. For example, the first bonding electrode part 11 includes one first redundant electrode 112, the second bonding electrode part 12 includes two second redundant electrodes 122, the first flexible circuit board 20 includes one first identification area 212, and the second flexible circuit board 30 includes two second identification areas 312.

[0087] At this time, the identification position includes a first identification position and a second identification position. The first identification position refers to the position on the surface of the flexible circuit board connected to the first bonding electrode part 11 that is away from the display panel 10, located at the location of the first redundant electrode 112 and the third redundant electrode 113. The second identification position refers to the position on the surface of the flexible circuit board connected to the second bonding electrode part 12 that is away from the display panel 10, located at the location of the second redundant electrode 122 / fourth redundant electrode 123.

[0088] In the case that the positions of the first redundant electrode 112 and the third redundant electrode 113 on the first identification position are flat structures, i.e., the first flexible circuit board 20 is not connected with the first binding electrode part 11, the first flexible circuit board 20 is connected with the second binding electrode part 12, and the connection relationship of the first flexible circuit board 20 is wrong; in the case that a part of the positions of the second redundant electrode 122 and the fourth redundant electrode 123 on the second identification position are flat structures, and the other part of the positions of the second redundant electrode 122 and the fourth redundant electrode 123 on the second identification position have uneven indentations, i.e., the second flexible circuit board 30 is not connected with the second binding electrode part 12, the second flexible circuit board 30 is connected with the first binding electrode part 11, and the connection relationship of the second flexible circuit board 30 is wrong. Therefore, by judging whether the connection relationship of the first flexible circuit board 20 and the second flexible circuit board 30 with the display panel 10 is correct or not, the product yield is improved, and the production cost is reduced.

[0089] In some embodiments, as shown in Figure 9 and Figure 10 The display panel 10 further includes a third binding electrode part 13, and the display module 100 further includes a third flexible circuit board 40. The third flexible circuit board 40 includes a third binding pin part 41, and the third binding electrode part 13 and the third binding pin part 41 are connected.

[0090] The third binding electrode part 13 includes a plurality of third electrodes 131 and a fifth redundant electrode 132 arranged at intervals, and the fifth redundant electrode 132 is located between two adjacent third electrodes 131. The third binding pin part 41 includes a plurality of third pins 411 and at least one third identification area 412 arranged at intervals. The plurality of third pins 411 are connected with the plurality of third electrodes 131, and the fifth redundant electrode 132 is located in the third identification area 412. The third identification area 412 is different from the first identification area 212 and the second identification area 312 in at least one of the number, shape, and position.

[0091] In some examples, as shown in Figure 10 The third binding electrode part 13 further includes a sixth redundant electrode 133, and the sixth redundant electrode 133 is located at the same position as the first redundant electrode 112 in the first binding electrode part 11 and the second redundant electrode 122 in the second binding electrode part 12, so that the structure of the third binding electrode part 13 is consistent with that of the first binding electrode part and the second binding electrode part 12, and the display panel 10 can be prepared in the same process, which is beneficial to improve the production efficiency of the display panel 10.

[0092] In some examples, as shown in Figure 10As shown, the number of third electrodes 131 on the side of the third identification area 412 close to the first binding electrode part 11 is different from the number of first electrodes 111 on the side of the first identification area 212 away from the second binding electrode part 12, and the number of second electrodes 121 on the side of the second identification area 312 close to the first binding electrode part 11. For example, the number of third pins 411 on the side of the third identification area 412 close to the first binding electrode part 11 is 5, the number of second pins 311 on the side of the second identification area 312 close to the first binding electrode part 11 is 13, and the number of first pins 211 on the side of the first identification area 212 away from the second binding electrode part 12 is 3, so the positions of the third identification area 412, the second identification area 312 and the first identification area 212 are all different.

[0093] At this time, the identification positions include a first identification position, a second identification position and a third identification position. The first identification position refers to the position of the first redundant electrode 112 and the third redundant electrode 113 on the surface of the flexible circuit board away from the display panel 10 and connected to the first binding electrode part 11. The second identification position refers to the position of the second redundant electrode 122 and the fourth redundant electrode 123 on the surface of the flexible circuit board away from the display panel 10 and connected to the second binding electrode part 12. The third identification position refers to the position of the fifth redundant electrode 132 and the sixth redundant electrode 133 on the surface of the flexible circuit board away from the display panel 10 and connected to the third binding electrode part 13.

[0094] By capturing the images of the first identification position, the second identification position and the third identification position, in the case that there is a concave-convex indentation on the position of the first redundant electrode 112 on the first identification position, that is, the first flexible circuit board 20 is not connected to the first binding electrode part 11, the first flexible circuit board 20 is connected to the second binding electrode part 12 or the third binding electrode part 13, the connection relationship of the first flexible circuit board 20 is wrong; in the case that there is a concave-convex indentation on the position of the second redundant electrode 122 on the second identification position, that is, the second flexible circuit board 30 is not connected to the second binding electrode part 12, the second flexible circuit board 30 is connected to the first binding electrode part 11 or the third binding electrode part 13, the connection relationship of the second flexible circuit board 30 is wrong; in the case that there is a concave-convex indentation on the position of the fifth redundant electrode 132 on the third identification position, that is, the third flexible circuit board 40 is not connected to the third binding electrode part 13, the third flexible circuit board 40 is connected to the first binding electrode part 11 or the second binding electrode part 12, the connection relationship of the third flexible circuit board 40 is wrong. Therefore, by judging whether the connection relationship of the first flexible circuit board 20, the second flexible circuit board 30 and the third flexible circuit board 40 with the display panel 10 is correct, the product yield is improved and the production cost is reduced.

[0095] It should be noted that the display panel 10 can further include more binding electrode parts 110, and the display module 100 can further include more flexible circuit boards 500, each of which is provided with a different identification area in terms of quantity, shape and position, which will not be listed one by one here, as long as the same technical idea is applied.

[0096] In some embodiments, as shown in Figure 11 , the length of the first reflective sheet 50 is greater than the length of the light guide plate 60 along the first direction X. Wherein, the first direction X is perpendicular to the second direction Y, and parallel to the plane where the light guide plate 60 is located. The second direction Y is the direction in which the light source 80 points to the light guide plate 60. In this case, the risk of the light at the edge of the light guide plate 60 not being reflected due to the shrinkage of the first reflective sheet 50 caused by heat can be reduced, which is conducive to improving the luminous brightness uniformity of the display module 100.

[0097] In some embodiments, as shown in Figure 11 , the display module 100 further includes a second reflective sheet 51, the second reflective sheet 51 is arranged on the side of the light guide plate 60, and the two ends of the second reflective sheet 51 have gaps between the optical film sheet 70 and the first reflective sheet 50. The installation space of the second reflective sheet 51 is larger, which can reduce the interference between the second reflective sheet 51 and the optical film sheet 70 and the first reflective sheet 50 during the installation of the second reflective sheet 51, which is conducive to improving the assembly efficiency.

[0098] In some embodiments, as shown in Figure 12 and Figure 13 , the light guide plate 60 is provided with a first positioning column 61, and the first positioning column 61 is arranged on the surface of the light guide plate 60 away from the first reflective sheet 50. The optical film sheet 70 includes a film body 71 and a lug 72, and the lug 72 is arranged on the side of the film body 71. Moreover, the optical film sheet 70 is provided with a first positioning hole 73, at least part of the first positioning hole 73 is located in the lug 72, and the first positioning hole 73 is sleeved on the first positioning column 61. At this time, by sleeving the first positioning hole 73 on the first positioning column 61, the positioning of the optical film sheet 70 is realized, and the lug 72 enhances the strength of the optical film sheet 70 to prevent the optical film sheet 70 from being broken at the first positioning hole 73.

[0099] In some examples, as shown in Figure 2 and Figure 12 , the first positioning column 61 is located at one end of the surface of the light guide plate 60 close to the light source 80.

[0100] In some examples, as shown in Figure 12 and Figure 13 , the side plate 220 is provided with a positioning groove 221, and the lug 72 is overlapped with the side plate 220 in the positioning groove 221 to realize the avoidance and support of the side plate 220 to the lug 72.

[0101] In some embodiments, as shown in Figure 12 and Figure 13 , along the first direction X, the distance between the first positioning column 61 and the edge of the first positioning hole 73 is greater than or equal to a preset value, the preset value is P, P=(L×α×ΔT×100000+s) / 2, where L is the length of the optical film, α is the linear expansion coefficient, ΔT is the temperature difference, and s is the tolerance. The temperature difference ΔT refers to the difference between the temperature in the reliability experiment and the normal temperature.

[0102] At this time, since the distance between the first positioning column 61 and the edge of the first positioning hole 73 is greater than or equal to the preset value, that is, the distance between the first positioning column 61 and the edge of the first positioning hole 73 is greater than the shrinkage or expansion amount of the optical film 70 in the first direction X in the reliability experiment. In this way, during the reliability experiment, when the optical film 70 shrinks or expands in the first direction X, the optical film 70 will not be squeezed between the first positioning column 61, thereby avoiding deformation of the optical film 70, and improving the display effect of the display device 1000.

[0103] In some embodiments, as shown in Figure 12 and Figure 13 , along the second direction Y, the distance between the first positioning column 61 and the edge of the first positioning hole 73 is less than or equal to 0.1 mm, so as to limit the optical film 70 in the second direction Y.

[0104] In some embodiments, as shown in Figure 12 and Figure 13 , the light guide plate 60 has a first center line extending along the second direction Y, and the light guide plate 60 is provided with a second positioning column 62, the second positioning column 62 is arranged on the surface of the light guide plate 60 away from the first reflective sheet 50, and is symmetrical about the first center line. The optical film 70 is provided with a second positioning hole 74, the second positioning hole 74 is sleeved on the second positioning column 62. And along the first direction X, the distance between the second positioning column 62 and the edge of the second positioning hole 74 is less than or equal to 0.1 mm, so as to limit the optical film 70 in the first direction X.

[0105] In some examples, as shown in Figure 12 , the second positioning hole 74 penetrates the boundary of the optical film 70 close to the side plate 220 to form an opening 741, which facilitates the second positioning hole 74 of the optical film 70 to be sleeved on the second positioning column 62.

[0106] It can be understood that, as shown in Figure 2 and Figure 14As shown, according to the structural design requirements of the display device 1000, the distance between the surface of the bottom plate 210 away from the first reflective sheet 50 and the first reflective sheet 50 can be variable. Exemplarily, the bottom plate 210 is arranged on the side of the first reflective sheet 50 away from the light guide plate 60, and the bottom plate 210 includes a first part 210a and a second part 210b. The distance between the surface of the second part 210b away from the first reflective sheet 50 and the first reflective sheet 50 is greater than the distance between the surface of the first part 210a away from the first reflective sheet 50 and the first reflective sheet 50. At this time, the second part 210b can be used for mounting connection with other structures, for example.

[0107] In addition, the second part 210b is provided with a first groove 210c on the side close to the first reflective sheet 50, so that the film thickness of the first part 210a and the film thickness of the second part 210b are consistent. In this way, during the preparation of the bottom plate 210, the problem of low strength of the bottom plate 210 caused by the large film thickness of the second part 210b and the resulting internal pores can be avoided.

[0108] Exemplarily, as shown in Figure 14 The arrangement mode of the first groove 210c is multi-row and multi-column, each row includes at least two first grooves 210c arranged along the first direction X, and each column includes at least two first grooves 210c arranged along the second direction Y.

[0109] In some embodiments, as shown in Figure 2 and Figure 14 The display module 100 further includes a protective pad 90 arranged between the first reflective sheet 50 and the second part 210b, and the protective pad 90 covers the first groove 210c, so as to prevent the edge of the first groove 210c from scratching the first reflective sheet 50 and causing white spots in the display module 100, thereby improving the yield of the display device 1000.

[0110] The material of the above-mentioned protective pad 90 includes a polyethylene terephthalate (PET) plastic. For example, the material of the protective pad 90 is a PET plastic.

[0111] In some examples, the side of the protective pad 90 close to the bottom plate 210 is provided with an adhesive glue, so that the protective pad 90 is pasted on the second part 210b and covers the first groove 210c, preventing the protective pad 90 from sliding between the first reflective sheet 50 and the second part 210b.

[0112] In some embodiments, as shown in Figure 14As shown, the protective pad 90 is provided with a first gap 91, and a projection of the first gap 91 on the bottom plate 210 is located within a projection of the first groove 210c on the bottom plate 210. One first groove 210c can be provided with one or more first gaps 91. At this time, the first gap 91 can discharge the gas in the first groove 210c, prevent the deformation of the protective pad 90 due to the expansion or contraction of the gas in the first groove 210c, and ensure the protective effect of the protective pad 90 on the edge of the first groove 210c and the reflective sheet 50.

[0113] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display module, characterized by The display module comprises: a display panel comprising a first binding electrode part and a second binding electrode part; the first binding electrode part comprises a plurality of first electrodes and a first redundant electrode arranged at intervals, the first redundant electrode being located between two adjacent first electrodes; the second binding electrode part comprises a plurality of second electrodes and a second redundant electrode arranged at intervals, the second redundant electrode being located between two adjacent second electrodes; a first flexible circuit board comprising a first binding pin part; the first binding pin part comprises a plurality of first pins and at least one first identification area arranged at intervals, the first identification area being located between two adjacent first pins; a plurality of the first pins are connected to a plurality of the first electrodes, and the first redundant electrode is located in the first identification area; a second flexible circuit board comprising a second binding pin part; the second binding pin part comprises a plurality of second pins and at least one second identification area arranged at intervals, the second identification area being located between two adjacent second pins; a plurality of the second pins are connected to a plurality of the second electrodes, and the second redundant electrode is located in the second identification area; wherein at least one of the number, shape and position of the first identification area and the second identification area is different.

2. The display module of claim 1, wherein, The number of the second redundant electrodes located in the second identification area is different from the number of the first redundant electrodes located in the first identification area.

3. The display module of claim 1, wherein, The number of the second pins on one side of the first binding electrode part close to the first identification area is different from the number of the first pins on the side of the first identification area away from the second binding electrode part.

4. The display module of claim 1, wherein, The first binding electrode part further comprises a third redundant electrode, the position of the third redundant electrode in the second binding electrode part being the same as that of the second redundant electrode; and the first pin is connected to the third redundant electrode; The second binding electrode part further comprises a fourth redundant electrode, the position of the fourth redundant electrode in the first binding electrode part being the same as that of the first redundant electrode; and the second pin is connected to the fourth redundant electrode.

5. The display module of claim 4, wherein, The positions of a plurality of the first electrodes in the first binding electrode part are the same as those of a plurality of the second electrodes in the second binding electrode part.

6. The display module of any one of claims 1-5, wherein, The distance between the first pins on both sides of the first identification area is greater than the distance between two adjacent first pins; and / or, the distance between the second pins on both sides of the second identification area is greater than the distance between two adjacent second pins.

7. The display module of claim 1, wherein, The display panel comprises opposite light-out and light-in sides; The display module further comprises: a first reflective sheet arranged on the light-in side of the display panel; a light guide plate arranged between the display panel and the first reflective sheet; an optical film arranged between the display panel and the light guide plate; a light source arranged on the side of the light guide plate and located between the first reflective sheet and the optical film; wherein, in a first direction, the length of the first reflective sheet is greater than the length of the light guide plate; the first direction is perpendicular to the second direction and parallel to the plane in which the light guide plate is located; the second direction is the direction in which the light source points to the light guide plate.

8. The display module of claim 7, wherein, The light guide plate is provided with a first positioning column, which is arranged on the surface of the light guide plate away from the first reflecting sheet. The optical film sheet comprises a film sheet body and a lug, the lug is arranged on the circumferential side of the film sheet body, and the optical film sheet is provided with a first positioning hole, at least part of the first positioning hole is located in the lug, and the first positioning hole is sleeved on the first positioning column.

9. The display module of claim 8, wherein, Along the first direction, the distance between the first positioning column and the edge of the first positioning hole is greater than or equal to a preset value; the preset value is P, P=(L×α×ΔT×100000+s) / 2; wherein, L is the length of the optical film sheet, α is the linear expansion coefficient, ΔT is the temperature difference, and s is the tolerance; Along the second direction, the distance between the first positioning column and the edge of the first positioning hole is less than or equal to 0.1mm.

10. The display module of claim 7, wherein, The light guide plate has a first middle line extending along the second direction, the light guide plate is provided with a second positioning column, the second positioning column is arranged on the surface of the light guide plate away from the first reflecting sheet, and is symmetrical about the first middle line; The optical film sheet is provided with a second positioning hole, the second positioning hole is sleeved on the second positioning column; and along the first direction, the distance between the second positioning column and the edge of the second positioning hole is less than or equal to 0.1mm.

11. The display module of claim 7, wherein, Further comprising: A second reflecting sheet is arranged on the circumferential side of the light guide plate; The two ends of the second reflecting sheet have a gap between the optical film sheet and the first reflecting sheet.

12. A display device comprising: The display device comprises a display module as claimed in any one of claims 1-11; the display device further comprises: A back plate having a mounting cavity; The display module is arranged in the mounting cavity.

13. The display device of claim 12, wherein, The back plate comprises a bottom plate, the bottom plate is arranged on the side of the first reflecting sheet away from the light guide plate; the bottom plate comprises a first part and a second part, the distance between the surface of the second part away from the first reflecting sheet and the first reflecting sheet is greater than the distance between the surface of the first part away from the first reflecting sheet and the first reflecting sheet, and the side of the second part close to the first reflecting sheet is provided with a first groove; The display module further comprises a protective pad, the protective pad is arranged between the first reflecting sheet and the second part; and the protective pad covers the first groove.

14. The display device of claim 13, wherein, The protective pad is provided with a first gap, the orthographic projection of the first gap on the bottom plate is located in the range of the orthographic projection of the first groove on the bottom plate.

Images