Display module and display device

Abstract

The utility model discloses a display module and a display device, relates to the technical field of display, and can improve the electrostatic protection capability of a display product, thereby avoiding the problem of device damage to the display product caused by ESD, improving the reliability of the display product and prolonging the service life of the display product. The display module comprises a display panel; the first flexible circuit board is in binding connection with the display panel, and the first flexible circuit board comprises an electronic device; the back plate is arranged on the side, away from the display side, of the display panel; the outer frame and the display panel are arranged on different sides of the back plate respectively, the outer frame and the back plate both comprise conductive materials, and at least part of the first flexible circuit board is located on the side, close to the back plate, of the outer frame; and the conductive adhesive tape is electrically connected with the back plate and the outer frame respectively.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] At present, with the continuous development of display technology, in order to increase the screen-to-body ratio of display screens, the research on narrow-frame technology has become more and more mature. The design parameters of narrow-frame display screens and ultra-narrow-frame products have reached their limits, resulting in an insufficient electrostatic discharge path, which is prone to damage to devices that generate ESD (Electro-Static discharge), directly affecting the reliability and service life of the display device. The electrostatic protection problem of narrow-frame display products needs to be solved urgently. Utility Model Content

[0003] The embodiments of the present application provide a display module and a display device, which can improve the electrostatic protection capability of a display product, thereby avoiding the problem of ESD causing damage to components of the display product, and improving the reliability and service life of the display product.

[0004] According to a first aspect of an embodiment of the present application, a display module is provided, comprising:

[0005] Display panel;

[0006] A first flexible circuit board, bound and connected to the display panel, wherein the first flexible circuit board includes electronic components;

[0007] A back plate, arranged on a side of the display panel away from the display side;

[0008] an outer frame, wherein the outer frame and the display panel are respectively arranged on different sides of the back plate, the outer frame and the back plate both comprise conductive materials, and at least a portion of the first flexible circuit board is located on a side of the outer frame close to the back plate;

[0009] Conductive tape is electrically connected to the back plate and the outer frame respectively.

[0010] In some embodiments, the conductive tape includes a first connecting surface and a second connecting surface, the first connecting surface and the second connecting surface are opposite to each other, the first connecting surface is electrically connected to the outer frame, and the second connecting surface is electrically connected to the back plate.

[0011] In some embodiments, the conductive tape includes a first connecting section and a second connecting section, the first connecting surface is located in the first connecting section, and the second connecting surface is located in the second connecting section.

[0012] In some embodiments, the first connecting segment and the second connecting segment extend in the same direction.

[0013] In some embodiments, the extension directions of the first connecting segment and the second connecting segment have an angle;

[0014] The first connecting section is arranged on a side of the outer frame close to the back plate, and the second connecting section is arranged on a side of the back plate away from the display panel.

[0015] In some embodiments, the backplane includes a first backplane and a second backplane, the first backplane and the second backplane have an included angle, the first backplane is connected to the side surface of the second backplane in the thickness direction, and the second backplane is arranged opposite to the display panel in the thickness direction;

[0016] The first back plate and the second back plate are used to form a receiving space, and the receiving space is used to receive the display panel and / or the light emitting device.

[0017] In some embodiments, the conductive tape is electrically connected to the outer frame and the second back plate respectively;

[0018] The conductive tape includes a first connecting section and a second connecting section, the first connecting section is located between the outer frame and the first back plate, and the second connecting section is located on a side of the second back plate away from the display panel.

[0019] In some embodiments, the display panel is disposed on a side of the first back plate away from the second back plate.

[0020] In some embodiments, at least a portion of the first flexible circuit board is located between the outer frame and the first back plate.

[0021] In some embodiments, the length of the conductive tape is less than the length of the first backplane edge, and the first backplane edge is the length of the backplane edge corresponding to the conductive tape.

[0022] In some embodiments, the display module further includes:

[0023] A printed circuit board is electrically connected to the first flexible circuit board, and the printed circuit board is arranged on a side of the outer frame close to the back plate.

[0024] In some embodiments, an insulating structure is disposed between the printed circuit board and the back plate.

[0025] In some embodiments, part of the conductive tape is located between the outer frame and the printed circuit board.

[0026] In some embodiments, the conductive tape is insulated and connected to the printed circuit board.

[0027] In some embodiments, the first flexible circuit board includes a device ground terminal and a main ground loop, a partition area is provided between the device ground terminal and the main ground loop, the partition area at least partially surrounds the device ground terminal, the device ground terminal and the main ground loop are insulated by the partition area, and the device ground terminal is electrically connected to the main ground loop through a connecting bridge.

[0028] In some embodiments, the display module further includes:

[0029] A support frame, in which a portion of the back plate is embedded, and the support frame is connected to an edge of the display surface;

[0030] The first flexible circuit board is arranged on a side of the support frame away from the back plate;

[0031] Part of the printed circuit board is arranged on a side of the support frame away from the back plate.

[0032] In some embodiments, the display module further includes:

[0033] a second flexible circuit board;

[0034] The second backplane is provided with a light-emitting driving circuit, a first light-emitting driving chip and a light-emitting device, the first light-emitting driving chip is electrically connected to the light-emitting device, the light-emitting driving chip is electrically connected to the light-emitting driving circuit, and the second flexible circuit board is electrically connected to the light-emitting driving circuit;

[0035] A second light-emitting driving chip, wherein the second light-emitting driving chip is electrically connected to the first light-emitting driving chip through the second flexible circuit board.

[0036] In some embodiments, the first flexible circuit board includes a display driver chip.

[0037] According to a second aspect of an embodiment of the present application, a display device is provided, including:

[0038] A display module as described in the first aspect.

[0039] The display module provided by the embodiment of the present application can form an electrostatic discharge path electrically connected between the outer frame and the backplane by setting a conductive tape, and can release the static electricity on the display panel to the backplane through the outer frame and the conductive tape in sequence, and then release the static electricity by grounding the backplane. A plurality of electrostatic discharge paths associated with the conductive tape can be added, and the amount of static electricity on the display panel released through the first flexible circuit board can be reduced, and the amount of static electricity released through the first flexible circuit board can be reduced, thereby reducing the electrostatic damage to the electronic devices on the first flexible circuit board, improving the reliability and service life of the first flexible circuit board, and thereby improving the reliability and service life of the display module. When applied to a display module with a narrow frame, the electrostatic discharge path can be increased without affecting the size of the frame, thereby reducing the damage to the device caused by static electricity. Furthermore, it can be applied to spliced ​​display products, and the setting of the conductive tape does not affect the size of the splicing seam, and can also improve the antistatic performance of the splicing display product. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic partial structural diagram of a display module provided in an embodiment of the present application;

[0041] Figure 2 A schematic partial structural diagram of another display module provided in an embodiment of the present application;

[0042] Figure 3 A schematic partial structural diagram of another display module provided in an embodiment of the present application;

[0043] Figure 4 A schematic three-dimensional partial structural diagram of a display module provided in an embodiment of the present application;

[0044] Figure 5 A schematic three-dimensional partial structural diagram of another display module provided in an embodiment of the present application;

[0045] Figure 6 A schematic partial structural diagram of another display module provided in an embodiment of the present application;

[0046] Figure 7 A schematic partial structural diagram of a first flexible circuit board provided in an embodiment of the present application;

[0047] Figure 8 A schematic structural diagram of a backlight provided in an embodiment of the present application;

[0048] Fig. 9 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0050] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0051] At present, with the continuous development of display technology, in order to increase the screen-to-body ratio of display screens, the research on narrow-border technology has become more and more mature. The design parameters of narrow-border display screens and ultra-narrow-border products have reached their limits, resulting in an insufficient electrostatic discharge path, which is easy to damage the devices that generate ESD, directly affecting the reliability and service life of the display device. The electrostatic protection problem of narrow-border display products needs to be solved urgently.

[0052] In view of this, the embodiments of the present application provide a display module and a display device, which can improve the electrostatic protection capability of the display product, thereby avoiding the problem of ESD causing device damage to the display product, and improving the reliability and service life of the display product.

[0053] In a first aspect of an embodiment of the present application, a display module is provided. Figure 1 This is a schematic partial structural diagram of a display module provided in an embodiment of the present application. Figure 1As shown, the display module includes: a display panel 100, a first flexible circuit board 200, a back panel 300, an outer frame 400 and a conductive tape 500. The display panel 100 may include an OLED (organic light emitting diode) display panel, a liquid crystal display panel, an LED display panel or a laser display panel, which is not specifically limited in the embodiments of the present application. One end of the first flexible circuit board 200 is bound and connected to the display panel, and the other end can be electrically connected to the printed circuit board. The first flexible circuit board 200 includes electronic devices, and the electronic devices can be integrated on the first flexible circuit board 200. The back panel 300 is arranged on the side of the display panel 100 away from the display side D; the display side D of the display panel 100 is the light emitting side of the display panel 100, and the light emitted by the display panel is used to display the picture. The back panel 300 can be used to provide support for the display panel 100, and the back panel 300 can also conduct static electricity to release the static electricity of the display panel 100 to the ground. For example, as Figure 1 As shown, the back plate 300 and the display panel 100 are arranged opposite to each other in the thickness direction H. The back plate 300 can also be in other shapes and positions, which are not specifically limited in the embodiments of the present application. The outer frame 400 and the display panel 100 are respectively arranged on different sides of the back plate 300, and the outer frame 400 can be used to wrap the side of the display panel 100. The outer frame 400 is arranged on the side of the back plate 300 in the thickness direction H. The outer frame 400 and the back plate 300 both include conductive materials, and at least part of the first flexible circuit board 200 is located on the side of the outer frame 400 close to the back plate 300. The conductive tape 500 is electrically connected to the back panel 300 and the outer frame 400 respectively. The conductive tape 500 can electrically connect the back panel 300 and the outer frame 400. The back panel 300 can be connected to the ground of the display device. Then the back panel 300 can be used as the ground, and the outer frame 400 can release the static electricity on the display panel 100 to the back panel 300, so as to form an electrostatic release path of display panel 100-outer frame 400-conductive tape 500-back panel 300-ground.

[0054] The display module provided in the embodiment of the present application uses the conductive tape 500 with a special shape to increase the grounding point, expand the ESD discharge path, and protect the electronic devices on the first flexible circuit board 200 from being damaged by static electricity.

[0055] Usually, the display panel will receive some static electricity from the environment or from the user, and the static electricity release path is: display panel-flexible circuit board-backplane. In such a release path, the static electricity of the display panel is released through the flexible circuit board. In the process of releasing static electricity, the static electricity of the flexible circuit board can easily cause static electricity damage to the electronic devices integrated on the flexible circuit board, affecting the performance and reliability of the flexible circuit board, and further affecting the reliability and service life of the display module. Especially in the splicing display unit, the splicing seam of the splicing display screen is a very important indicator, which is directly related to the display effect of the splicing display wall. Therefore, the ultimate pursuit of narrow bezels has become the inevitable development direction of splicing display modules. However, the design parameters of ultra-narrow bezel products have reached their limits, resulting in an insufficiently smooth static electricity discharge path, which makes it more likely that device damage will occur during ESD testing.

[0056] The display module provided by the embodiment of the present application forms an electrostatic discharge path electrically connected between the outer frame 400 and the back plate 300 by setting a conductive tape 500, and the static electricity on the display panel 100 can be released to the back plate 300 through the outer frame 400 and the conductive tape 500 in sequence, and the static electricity is released through the back plate grounding. A plurality of electrostatic discharge paths associated with the conductive tape can be added, and the amount of static electricity on the display panel 100 released through the first flexible circuit board 200 can be reduced, and the amount of static electricity released through the first flexible circuit board 200 can be reduced, thereby reducing the electrostatic damage to the electronic devices on the first flexible circuit board 200, improving the reliability and service life of the first flexible circuit board 200, and thereby improving the reliability and service life of the display module. When applied to a display module with a narrow frame, the electrostatic discharge path can be increased without affecting the frame size, and the device damage caused by static electricity can be reduced. It can then be applied to a spliced ​​display product, and the setting of the conductive tape 500 does not affect the size of the splicing seam, and can also improve the antistatic performance of the spliced ​​display product.

[0057] In some embodiments, the conductive adhesive tape 500 may include a first connection surface and a second connection surface, and the first connection surface and the second connection surface are opposite to each other, that is, it can be understood that the conductive adhesive tape 500 has double-sided adhesiveness, one side is used to bond the outer frame 400, and the other side is used to bond the back plate 300. For example, the first connection surface is electrically connected to the outer frame 400, and the second connection surface is electrically connected to the back plate 300. The outer frame 400 and the back plate 300 are not arranged in the same plane, so the conductive adhesive tape 500 with double-sided adhesiveness is required to connect the outer frame 400 and the back plate 300.

[0058] In some embodiments, the conductive tape 500 may include a first connecting section and a second connecting section, the first connecting surface is located in the first connecting section, the second connecting surface is located in the second connecting section, the first connecting section and the second connecting section may be an integrally formed structure, or a structure connected in separate parts, which is not specifically limited in the embodiments of the present application. The first connecting section and the second connecting section may belong to different spatial regions, and the first connecting surface and the second connecting surface also belong to different regions of the conductive tape 500, that is, the first connecting surface and the second connecting surface that are opposite to each other are offset and opposite to each other on the body of the conductive tape 500, and the orthographic projections of the first connecting surface and the second connecting surface on the body of the conductive tape 500 are substantially non-overlapping, and a small portion of overlap may exist depending on the process accuracy.

[0059] In some embodiments, the first connection section and the second connection section extend in the same direction, that is, the conductive tape 500 may be arranged straight, which can be understood as the conductive tape 500 being sandwiched between the outer frame 400 and the back plate 300 .

[0060] In some embodiments, the extension directions of the first connection section and the second connection section have an angle, the first connection section is disposed on a side of the outer frame 400 close to the back plate 300, and the second connection section is disposed on a side of the back plate 300 away from the display panel 100. That is, it can be understood that the conductive tape 500 is in a bent state to electrically connect the outer frame 400 with the back plate 300, and the configuration shape of the conductive tape 500 can be configured according to the positional relationship and shape of the outer frame 400 and the back plate 300.

[0061] In some embodiments, the backplane may include a first backplane and a second backplane, the first backplane and the second backplane have an angle, the first backplane and the second backplane are connected at the side surfaces in the thickness direction H, and the second backplane and the display panel are arranged opposite to each other in the thickness direction H; the first backplane and the second backplane are used to form a receiving space, and the receiving space is used to receive the display panel and / or the light-emitting device. It should be noted that the backplane can form a receiving space by casting or stamping, and the display panel can be arranged in the receiving space; the backplane can also be used as a backplane of the backlight in the liquid crystal display module, and the light-emitting device of the backlight can be arranged in the receiving space formed by the backplane. In some examples, the display panel and the light-emitting device can both be arranged in the receiving space, or part of the display panel can be embedded in the receiving space, which is not specifically limited in the embodiments of the present application.

[0062] For example, Figure 2 A schematic partial structural diagram of another display module provided in an embodiment of the present application. Figure 2As shown, the conductive adhesive tape 500 may include a first connection surface 501 and a second connection surface 502, and the first connection surface 501 and the second connection surface 502 are opposite to each other. The first connection surface 501 is electrically connected to the outer frame 400, and the second connection surface 502 is electrically connected to the back plate 300. The first connection surface 501 and the second connection surface 502 are respectively located on two opposite sides of the conductive adhesive tape 500.

[0063] In some examples, reference Figure 2 The conductive tape 500 may include a first connecting section 510 and a second connecting section 520. The first connecting surface 501 is located in the first connecting section 510, and the second connecting surface 502 is located in the second connecting section 520. The first connecting section 510 and the second connecting section 520 may be an integrally formed structure or a separately connected structure. The first connecting section 510 and the second connecting section 520 may belong to different spatial regions.

[0064] In some examples, reference Figure 2 , the extending directions of the first connecting section 510 and the second connecting section 520 have an angle, the first connecting section 510 is arranged on the side of the outer frame 400 close to the back plate 300, and the second connecting section 520 is arranged on the side of the back plate 300 away from the display panel 100. That is, it can be understood that the conductive tape 500 is in a bent state, bent into an "L" shape, so as to electrically connect the outer frame 400 and the back plate 300.

[0065] In some examples, reference Figure 2 The back plate 300 may include a first back plate 310 and a second back plate 320, the first back plate 310 and the second back plate 320 have an angle, the first back plate 310 and the second back plate 320 are connected at the side surface in the thickness direction H, and the second back plate 320 and the display panel 100 are arranged opposite to each other in the thickness direction H; the first back plate 310 and the second back plate 320 are used to form a receiving space, and the receiving space is used to receive the light-emitting device 301, and the light-emitting device 301 can be arranged in an array on the second back plate 320. The light-emitting device 301 can be set on the circuit board on the second back plate 320 by means of punching or welding. The first back plate 310 and the second back plate 320 can be connected in an "L" shape.

[0066] Exemplarily, the first back plate 310 and the second back plate 320 may be an integrally formed structure, which is easy to manufacture, has a mature process, and has a high precision.

[0067] refer to Figure 2, other structures or components may need to be arranged between the outer frame 400 and the first back plate 310, and the conductive adhesive tape 500 can realize the electrical connection between the side of the outer frame 400 close to the back plate 300 and the side of the second back plate 320 away from the display panel 100 through the "L"-shaped structure. Therefore, the "L"-shaped conductive adhesive tape 500 will not increase the size of the display module frame and will not affect the narrow frame effect of the display module.

[0068] In some examples, reference Figure 2 The first connecting section 510 is located between the outer frame 400 and the first back plate 310, and the second connecting section 520 is located on a side of the second back plate 320 away from the display panel 100. The display panel 100 is disposed on a side of the first back plate 310 away from the second back plate 320. A portion of the first flexible circuit board 200 is located between the outer frame 400 and the first back plate 310.

[0069] Exemplarily, the material of the outer frame 400 and the back plate 300 may include metal, such as aluminum, iron, copper, nickel, and metal alloys, etc., which is not specifically limited in the embodiment of the present application.

[0070] Exemplarily, the conductive tape 500 may include conductive particles or graphite, etc., which is not specifically limited in the embodiment of the present application.

[0071] For example, the surface of the outer frame 400 may be sprayed with a protective paint, which is usually insulating. In the area where the outer frame 400 is connected to the first connection surface 501, the outer frame 400 may remove the protective paint locally to enable the conductive tape 500 to be electrically connected to the outer frame 400. The back plate 300 may be used as a grounding function, so the back plate 300 may not be sprayed with paint.

[0072] Exemplary, reference Figure 2 The first back plate 310 may be disposed opposite to the main body of the outer frame 400 , and the outer frame 400 may partially wrap the edge of the display panel 100 .

[0073] In some examples, reference Figure 2 The display module further includes a printed circuit board 600, which is electrically connected to one end of the first flexible circuit board 200, and the other end of the first flexible circuit board 200 is bound and connected to the display panel 100, and the printed circuit board 600 is arranged on a side of the outer frame 400 close to the back plate 300. That is, the printed circuit board 600 is arranged between the outer frame 400 and the first back plate 310. Exemplarily, multiple first flexible circuit boards 200 can be connected to the same printed circuit board 600, and the printed circuit board 600 can be connected to the main controller through a strip of wiring.

[0074] In some examples, an insulating structure is provided between the printed circuit board 600 and the back plate 300. Figure 2An insulating structure 700 is provided between the printed circuit board 600 and the first back plate 310, and the insulating structure 700 may include insulating foam, PET or other insulating materials. The insulating structure 700 may play a role of filling support on the one hand, and may also play an insulating role. The setting of the insulating structure 700 may block the electrostatic discharge path of the display panel 100-first flexible circuit board 200-printed circuit board 600-conductive foam-back plate 300, and may release the static electricity on the display panel 100 through the path of the outer frame 400-conductive tape 500-back plate 300, and may directly avoid the damage of static electricity to the electronic devices on the first flexible circuit board 200.

[0075] Exemplarily, the first flexible circuit board 200 may include a display driver chip, which may be bound, plugged or welded on the first flexible circuit board body, that is, the first flexible circuit board 200 uses COF (Chip on Film). The change of the electrostatic discharge path can protect the driver chip from damage.

[0076] In some examples, a portion of the conductive tape is located between the outer frame and the printed circuit board.

[0077] In some examples, reference Figure 2 The first connecting section 510 is disposed on a side of the printed circuit board 600 away from the first flexible circuit board 200 .

[0078] In some embodiments, the conductive tape 500 is insulated and connected to the printed circuit board 600, which can prevent static electricity from being released along the path of the first flexible circuit board 200-printed circuit board 600-conductive tape 500, that is, blocking the static electricity release path that may pass through the first flexible circuit board 200 to protect the first flexible circuit board 200 from static electricity damage.

[0079] In some embodiments, the display module further includes a support frame, a portion of the back plate 300 is embedded in the support frame, and the support frame is connected to the edge of the display panel 100; the first flexible circuit board 200 is disposed on a side of the support frame 800 away from the back plate 300; and the printed circuit board 600 is disposed on a side of the support frame away from the back plate 300. For example, referring to Figure 2 The support frame 800 is provided with a groove body, and the first back panel 310 can be embedded in the groove body of the support frame 800; the support frame 800 is also provided with a step structure, which is used to overlap the end of the first optical film material 302, and the end of the second optical film material 303 can be connected to the end of the support frame 800 away from the back panel 300.

[0080] Exemplary, reference Figure 2The first optical film material 302 and the second optical film material 303 can be films used for backlighting to make light uniform, such as prism films, atomizing films, and light guide plates, etc., which are not listed here. The third optical film material 304 can be a lower polarizer of a display panel.

[0081] Exemplarily, the material of the support frame 800 may be an insulating material. The support frame 800 is used to support the back panel 300 and the optical film material. The support frame 800 and the back panel 300 form a receiving space for the backlight.

[0082] For example, Figure 3 A schematic partial structural diagram of another display module provided in an embodiment of the present application. Figure 3 As shown, the display module includes a cover plate 900 , which is located on a side of the display panel 100 away from the back plate 300 , and one end of the first flexible circuit board 200 bound and connected to the display panel 100 is located between the display panel 100 and the cover plate 900 .

[0083] It should be noted that Figure 2 and Figure 3 The display module shown is a liquid crystal display module, and the accommodation space of the back plate 300 is used to accommodate the light emitting device 301 .

[0084] For example, Figure 4 A schematic three-dimensional partial structure diagram of a display module provided in an embodiment of the present application. Figure 4 As shown, in the three-dimensional structure diagram from a horizontal perspective, the first connecting section 510 of the conductive tape can be seen, and most of the first flexible circuit board 200 and the printed circuit board are covered by the outer frame 400. Figure 5 A schematic three-dimensional partial structural diagram of another display module provided in an embodiment of the present application. Figure 5 As shown in the three-dimensional structure diagram from a bottom-up perspective, the first connecting section 510 and the second connecting section 520 of the conductive tape can both be seen. Figure 4 and Figure 5 The display module further includes an auxiliary connection belt 530, which can be arranged at the corner of the display module to fix the conductive tapes on both sides of the corners and play a role in fixing the conductive tapes. The auxiliary connection belt 530 can be conductive or non-conductive.

[0085] It should be noted that Figure 4 and Figure 5 In order to clearly indicate the position of the conductive tape, the outline of the conductive tape is placed on the top layer for illustration. In fact, in the three-dimensional view, the outer frame 400 will also cover the conductive tape.

[0086] In some examples, the conductive tape 500 is disposed on a side frame of the first flexible circuit board 200 , and the conductive tape 500 can be used to expand the electrostatic discharge path to protect the first flexible circuit board 200 from electrostatic damage.

[0087] In some embodiments, the length of the conductive tape 500 is less than the length of the edge of the first backplane, and the edge of the first backplane is the length of the edge of the backplane corresponding to the conductive tape 500. The conductive tape 500 can protect the first flexible circuit board 200 from being damaged by static electricity, so the length of the conductive tape 500 can cover the area where the first flexible circuit board 200 is located. If the length of the frame distributed on the first flexible circuit board 200 and the length of the multiple flexible circuit boards 200 distributed pairs are smaller than the length of the frame of the display module, then the corresponding length of the conductive tape 500 is also smaller than the length of the corresponding frame.

[0088] For example, Figure 6 A schematic partial structural diagram of another display module provided in an embodiment of the present application. Figure 6 As shown, it is a bottom view of the side where the second backplane 320 is located. The length of the edge of the first backplane is the first length L1, and two conductive tapes 500 are arranged on the edge of the first backplane. The length of one conductive tape 500 is the second length L2, and the length of the edge of the second backplane is the third length L3. The first backplane edge and the second backplane edge are two adjacent edges of the second backplane 320. The second length L2 is less than half of the first length L1, and the first length L1 and the third length L3 can be set according to actual product requirements. The two conductive tapes 500 can avoid the plug cable 601, and the plug cable 601 can be used to connect the printed circuit board and other circuit boards or devices. The plug cable 601 can be a soft wire. The provision of two or more conductive tapes will not bring difficulty to the production of the conductive tape.

[0089] In some examples, an avoidance hole may be provided in the middle of the entire conductive tape to avoid the extension cord 601 , and there is no need to provide two conductive tapes.

[0090] In some examples, an insulating tape may be used to cover the binding area of ​​the first flexible circuit board 200. The side of the display module provided with the first flexible circuit board 200 may be the sky side, and the conductive tape 500 is provided on the sky side to expand the static discharge path of the sky side, increase the ground potential, and more comprehensively protect the electronic devices and circuits on the first flexible circuit board 200.

[0091] Since the metal outer frame 400 is connected to the back panel 300 by screws, there is only point contact but no surface contact. During the ESD test, when the static electricity emitted by the electrostatic gun enters the display module, the static electricity cannot be discharged in time, which will cause damage to the display driver chip on the first flexible circuit board 200. Therefore, without painting the inside of the outer frame 400, a conductive tape 500 is attached to the opposite side, and the adhesive on the first connecting surface 501 of the conductive tape 500 is in contact with the outer frame 400; after bending, the side adhesive on the second connecting surface 502 facing the second back panel 320 is in contact with the second back panel 320.

[0092] Exemplary, reference Figure 6 , the second length L2 can be 578.1mm. After the two conductive tapes are spliced, the total length is slightly less than the first length L1, and the first length L1 can be 1212.7mm. After the conductive tapes are spliced, the minimum length limit is to cover the outer edge of the first first flexible circuit board at both ends of the display module. The metal frame 400 is connected to the back plate through two conductive tapes and a series of screws. This can improve the grounding of the frame, and when static electricity is released to the frame, it is promptly introduced into the back plate to the ground, avoiding static electricity from entering the display driver chip on the COF and causing damage to it.

[0093] In some examples, the first flexible circuit board includes a device ground terminal and a main ground loop, a partition area is provided between the device ground terminal and the main ground loop, the partition area at least partially surrounds the device ground terminal, the device ground terminal and the main ground loop are insulated by the partition area, and the device ground terminal is electrically connected to the main ground loop through a connecting bridge. The device ground terminal is used to ground the electronic device or circuit on the flexible circuit board, the main ground loop is used to access the ground terminal of the printed circuit board, and all device ground terminals are electrically connected to the main ground loop. For example, the main ground loop can be provided around the electronic device, or the main ground loop is provided in the peripheral area of ​​the first flexible circuit board to facilitate the connection of the device ground terminal.

[0094] For example, Figure 7 This is a schematic partial structural diagram of a first flexible circuit board provided in an embodiment of the present application. Figure 7 As shown, there is a partition area 203 between the device ground terminal 201 and the main ground loop 202, and the device ground terminal 201 and the main ground loop 202 are electrically connected through a connecting bridge 204, and the connecting bridge 204 crosses the partition area 203. Usually, the main ground loop 202 is closer to the earth, and current fluctuations are likely to exist in the earth. The partition area 203 can filter the current fluctuations on the earth to prevent the current fluctuations at the ground end from affecting the electronic device. The partition area 203 surrounds the device ground terminal 201. The connecting bridge 204 can be set on the same layer as the main ground loop 202, or it can be bridged by a via on a separate conductive layer.

[0095] In the display module provided in the embodiment of the present application, since the first flexible circuit board 200 is an ESD weak link and is easily damaged by ESD coupling, an isolated ground method is used and connected through a connecting bridge 204. The ground end of the display driver chip of the first flexible circuit board 200 is connected to the main ground loop 202 through the connecting bridge 204, and the main ground loop 202 is connected to the back plate through the conductive foam pasted on the copper exposed area.

[0096] In some embodiments, the light board of the backlight can be shared with the second back plate 320, that is, the second back plate 320 serves as the light board of the backlight. In other examples, the light board of the backlight can be set independently of the second back plate 320. The light board is used to set the light emitting device, the light emitting driving circuit and the light emitting driving chip.

[0097] In some examples, the display module also includes: a second flexible circuit board and a second light-emitting driving chip; the second back panel 320 is provided with a light-emitting driving circuit, a first light-emitting driving chip and a light-emitting device, the first light-emitting driving chip is electrically connected to the light-emitting device, the light-emitting driving chip is electrically connected to the light-emitting driving circuit, and the second flexible circuit board is electrically connected to the light-emitting driving circuit; the second light-emitting driving chip is electrically connected to the first light-emitting driving chip through the second flexible circuit board.

[0098] For example, Figure 8 This is a schematic structural diagram of a backlight provided in an embodiment of the present application. Figure 8 As shown, the display module provided in the embodiment of the present application is a liquid crystal display module, and the liquid crystal display module includes a backlight, and the backlight includes a light board 330. The light board 330 can be shared with the backboard 320 or can be independently set, and the embodiment of the present application does not make specific limitations.

[0099] refer to Figure 8 A light-emitting device 301 and a first light-emitting driving chip 305 are arranged on the light board 330. The backlight also includes a second flexible circuit board 306 and a driving circuit board 307. A second light-emitting driving chip 308 and an electronic driving device 309 are arranged on the driving circuit board 307. The second light-emitting driving chip 308 can be used as an MCU (micro control unit). The second light-emitting driving chip 308 can control the light-emitting device 301 to emit light or turn off the light through the light-emitting driving circuit and the first light-emitting driving chip 305. The light-emitting device 301 can be an LED.

[0100] Exemplarily, a plurality of light emitting devices 301 may be connected to the same first light emitting driving chip 305 ; the light emitting devices 301 may also be connected to the first light emitting driving chip 305 in a one-to-one correspondence.

[0101] In some embodiments, reference Figure 8 The driving system of the backlight may include a driving circuit board 307 and a light board 330, and the driving circuit board 307 may include a conversion connector.

[0102] According to a second aspect of the embodiments of the present application, a display device is provided. Fig. 9 Schematic diagram of a display device provided in an embodiment of the present application. Fig. 9 As shown, the display device provided in the embodiment of the present application includes the display module 1000 as described in the first aspect.

[0103] In some examples, the display module of the display device includes a driving circuit board, a first light-emitting driving chip, and a second light-emitting driving chip. Static electricity in the display module can easily cause the backlight to go out in some areas. To address the problem of the backlight going out in some areas, after the driving circuit board is powered on, in the first stage, the first light-emitting driving chip can be configured to an initialization state so that the driver-related configuration information can be written in the initialization state.

[0104] In the second stage, the second light-emitting driver chip can be configured to send backlight data to the first light-emitting driver chip. The first light-emitting driver chip in normal working state can normally receive the backlight data of the second light-emitting driver chip, and drive the light-emitting device to emit light through the backlight data. In the case where the working state of the first light-emitting driver chip is abnormal under electrostatic interference, the first light-emitting driver chip can be configured to a reset state, and the configuration information of the first light-emitting driver chip after reset is restored to the default value. At this time, the first light-emitting driver chip cannot normally receive the backlight data, and the light-emitting device is turned off.

[0105] In the third stage, after the light-emitting device turns off, the first light-emitting driving chip can be configured to read back all internal information.

[0106] In the fourth stage, the driving circuit board or controller can be configured to compare the read-back internal information with the configuration information. The internal information of the first light-emitting driver chip corresponding to the normally emitting device is the same as the configuration information after power-on, and the internal information of the first light-emitting driver chip corresponding to the extinguished light-emitting device is different from the configuration information after power-on.

[0107] After the light emitting device is lit or the light emitting device is turned off, the second stage can be continued, and the cycle is repeated in sequence.

[0108] Since the reset first light-emitting driver chip restores the default value and cannot accept the backlight data, even if it returns to the second stage cycle, the light-emitting device that has been turned off still cannot light up, and the light-emitting abnormality caused by ESD cannot be resolved.

[0109] In some implementations, after the driver circuit board is powered on, in a first stage, the first light-emitting driver chip may be configured to be in an initialization state, and driver-related configuration information may be written into the initialization state.

[0110] In the second stage, the second light-emitting driver chip can be configured to send backlight data to the first light-emitting driver chip. The first light-emitting driver chip is configured to process the backlight data after receiving it and output the duty cycle of each light-emitting partition to drive the light-emitting device to emit light.

[0111] In the third stage, the second light-emitting driver chip can be configured to send a readback instruction to the first light-emitting driver chip. The first light-emitting driver chip can be configured to read back internal information based on the received readback instruction and feed back the readback internal information to the second light-emitting driver chip.

[0112] In the fourth stage, the second light-emitting driver chip can be configured to determine whether the first light-emitting driver chip is reset according to the read-back internal information. When the first light-emitting driver chip is in the reset state, the driver circuit board can be configured to perform a restart and continue to enter the first stage; when the first light-emitting driver chip is in the unreset state, continue to enter the first stage.

[0113] Restarting the driver circuit board can eliminate the backlight off caused by ESD interference. By testing the transmission signal between the second light-emitting driver chip and the first light-emitting driver chip, it can be seen that the first light-emitting driver chip has a signal fed back to the second light-emitting driver chip.

[0114] It should be noted that the display device provided in the embodiments of the present application may include a television, a computer, a spliced ​​display wall, a tablet computer, a smart phone, and a wearable display, etc. The wearable display may include a smart watch and smart glasses, etc., and the embodiments of the present application do not make specific limitations.

[0115] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0116] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0117] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0118] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A display module, characterized in that: include: Display panel; A first flexible circuit board, bound and connected to the display panel, wherein the first flexible circuit board includes electronic components; A back plate, arranged on a side of the display panel away from the display side; an outer frame, wherein the outer frame and the display panel are respectively arranged on different sides of the back plate, the outer frame and the back plate both comprise conductive materials, and at least a portion of the first flexible circuit board is located on a side of the outer frame close to the back plate; Conductive tape is electrically connected to the back plate and the outer frame respectively.

2. The display module according to claim 1, characterized in that: The conductive tape includes a first connection surface and a second connection surface, the first connection surface and the second connection surface are opposite to each other, the first connection surface is electrically connected to the outer frame, and the second connection surface is electrically connected to the back plate.

3. The display module according to claim 2, characterized in that: The conductive tape includes a first connecting section and a second connecting section, the first connecting surface is located in the first connecting section, and the second connecting surface is located in the second connecting section.

4. The display module according to claim 3, characterized in that: The first connecting section and the second connecting section extend in the same direction.

5. The display module according to claim 3, characterized in that: The extension directions of the first connecting section and the second connecting section form an angle; The first connecting section is arranged on a side of the outer frame close to the back plate, and the second connecting section is arranged on a side of the back plate away from the display panel.

6. The display module according to any one of claims 1 to 5, characterized in that: The backplane comprises a first backplane and a second backplane, the first backplane and the second backplane have an included angle, the first backplane is connected to the side surface of the second backplane in the thickness direction, and the second backplane is arranged opposite to the display panel in the thickness direction; The first back plate and the second back plate are used to form a receiving space, and the receiving space is used to receive the display panel and / or the light emitting device.

7. The display module according to claim 6, characterized in that: The conductive tape is electrically connected to the outer frame and the second back plate respectively; The conductive tape includes a first connecting section and a second connecting section, the first connecting section is located between the outer frame and the first back plate, and the second connecting section is located on a side of the second back plate away from the display panel.

8. The display module according to claim 6, characterized in that: The display panel is arranged on a side of the first back plate away from the second back plate.

9. The display module according to claim 6, characterized in that: At least a portion of the first flexible circuit board is located between the outer frame and the first back plate.

10. The display module according to any one of claims 1 to 5, characterized in that: The length of the conductive tape is smaller than the length of the edge of the first backplane, and the first backplane edge is the length of the edge of the backplane corresponding to the conductive tape.

11. The display module according to any one of claims 1 to 5, characterized in that: Also includes: A printed circuit board is electrically connected to the first flexible circuit board, and the printed circuit board is arranged on a side of the outer frame close to the back plate.

12. The display module according to claim 11, characterized in that: An insulating structure is arranged between the printed circuit board and the back plate.

13. The display module according to claim 11, characterized in that: Part of the conductive tape is located between the outer frame and the printed circuit board.

14. The display module according to claim 11, characterized in that: The conductive tape is insulated and connected to the printed circuit board.

15. The display module according to any one of claims 1 to 5, characterized in that: The first flexible circuit board includes a device grounding terminal and a main grounding loop, a partition area is arranged between the device grounding terminal and the main grounding loop, the partition area at least partially surrounds the device grounding terminal, the device grounding terminal and the main grounding loop are insulated by the partition area, and the device grounding terminal is electrically connected to the main grounding loop through a connecting bridge.

16. The display module according to claim 11, characterized in that: Also includes: A support frame, in which a portion of the back plate is embedded, and the support frame is connected to an edge of the display surface; The first flexible circuit board is arranged on a side of the support frame away from the back plate; Part of the printed circuit board is arranged on a side of the support frame away from the back plate.

17. The display module according to claim 6, characterized in that: Also includes: a second flexible circuit board; The second backplane is provided with a light-emitting driving circuit, a first light-emitting driving chip and a light-emitting device, the first light-emitting driving chip is electrically connected to the light-emitting device, the light-emitting driving chip is electrically connected to the light-emitting driving circuit, and the second flexible circuit board is electrically connected to the light-emitting driving circuit; A second light-emitting driving chip, wherein the second light-emitting driving chip is electrically connected to the first light-emitting driving chip through the second flexible circuit board.

18. The display module according to claim 1, characterized in that: The first flexible circuit board includes a display driving chip.

19. A display device, characterized in that: include: The display module according to any one of claims 1 to 18.

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