Display module and electronic equipment

Abstract

The utility model relates to a display module which comprises an antenna, a circuit board and a display panel, the circuit board is arranged on a non-display surface of the display panel, the antenna is attached and fixed on the inner side of a shell, the antenna comprises a substrate and an induction coil, and the antenna and the shell are attached and fixed together through the substrate. It can be understood that the antenna is attached to the display face, close to the display panel, of the shell or located on the side, away from the non-display face, of the circuit board, and the driving circuit is usually located on the non-display side of the display panel, so that a certain distance exists between the antenna and the driving circuit, and the driving circuit of the display panel is completely avoided; and the problem that the antenna is interfered by the driving circuit is avoided. The near-field sensing distance of the antenna of the display module is increased, and the user experience is improved. The utility model further provides electronic equipment comprising the display module.

Description

Technical Field

[0001] The utility model relates to the field of display technology, and in particular to a display module and an electronic device. Background Art

[0002] Some display modules have wireless communication functions to enhance user experience. However, wireless communication functions usually require the use of various antennas, so it is necessary to consider how to assemble the antenna to the display module.

[0003] Currently, the antenna is directly set on the circuit board, and the circuit board is attached to the back of the display panel. The antenna is easily affected by the display panel and the circuit board, which shortens the sensing distance of the antenna, resulting in a poor user experience.

[0004] It should be noted that the information of the utility model in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] The utility model aims to overcome the problem that the antenna is easily affected by the display panel and the circuit board, which shortens the sensing distance of the antenna, and provides a display module and an electronic device.

[0006] According to one aspect of the utility model, a display module is provided, including a shell, a display panel, a circuit board and an antenna, the shell having a display opening; the display panel is arranged on the inner side of the shell, and the display surface of the display panel is exposed from the display opening; the circuit board is arranged on the non-display surface of the display panel; the antenna is adhered and fixed to the inner side of the shell, the antenna is electrically connected to the circuit board, the antenna includes a substrate and an induction coil, the substrate is adhered and fixed to a side of the shell close to the display panel or a side close to the circuit board, and the induction coil is arranged on a side of the substrate away from the shell.

[0007] In one embodiment of the utility model, the housing includes a front frame, the display opening is arranged on the front frame, the antenna is arranged on the periphery of the display panel, and the antenna is attached and fixed to a surface of the front frame close to the display side of the display panel.

[0008] In one embodiment of the present invention, the housing is an injection-molded part, and the antenna is combined with the housing through an injection molding process.

[0009] In one embodiment of the utility model, the substrate includes a base film, a conductive layer, a protective layer, an insulating layer and a connecting layer stacked in sequence, the connecting layer is tightly combined with the shell during injection molding, the induction coil is arranged on a side of the base film away from the connecting layer, and the induction coil is connected to the conductive layer through a via.

[0010] In an embodiment of the present invention, the antenna further includes a binding pin, and a spring sheet is provided on a side of the circuit board close to the antenna, and the spring sheet is pressed tightly against the binding pin.

[0011] In one embodiment of the present invention, the antenna is attached to the housing via adhesive.

[0012] In one embodiment of the present invention, the antenna is a near-field induction antenna.

[0013] In an embodiment of the present invention, the area between the antenna and the opening is an overlap area, the display panel has a display area and a non-display area, the display area overlaps the overlap area, and the display area is exposed outside the opening.

[0014] In one embodiment of the utility model, the housing further includes a rear housing, and the antenna is attached to and fixed on a side of the rear housing close to the circuit board.

[0015] In one embodiment of the utility model, a fixing plate is provided on one side of the circuit board close to the rear shell, and a strip groove is provided on the fixing plate. The lead of the display panel passes through the strip groove and is bound to the conductive part of the side of the circuit board close to the rear shell.

[0016] In one embodiment of the present invention, the display panel is an electronic ink screen.

[0017] According to another aspect of the present invention, an electronic device is provided, comprising the display module provided by any one aspect of the present invention.

[0018] The display module of the utility model includes an antenna, a circuit board and a display panel. The circuit board is arranged on the non-display surface of the display panel. The antenna is attached and fixed to the inner side of the housing. The antenna includes a substrate and an induction coil. The antenna is attached and fixed to the housing through the substrate. It can be understood that the antenna is attached to the display surface of the housing close to the display panel or is located on the side of the circuit board away from the non-display surface. The driving circuit is usually located on the non-display side of the display panel. Therefore, there is a certain distance between the antenna and the driving circuit, which completely avoids the driving circuit of the display panel and avoids the problem of the antenna being interfered by the driving circuit. The near-field sensing distance of the antenna of the display module is increased, and the user experience is improved.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is an exploded view of the display module involved in the embodiment of the utility model when the antenna is arranged on the circuit board.

[0022] Figure 2 The schematic diagram of the structure of the front frame according to the embodiment of the utility model is when the antenna is attached and fixed to the inner side of the front frame.

[0023] Figure 3 It is a plan view of a circuit board according to an embodiment of the utility model when an antenna is arranged on the circuit board.

[0024] Figure 4 The schematic plan view of the circuit board according to the embodiment of the utility model is when the antenna is attached and fixed to the inner side of the front frame.

[0025] Figure 5 It is a cross-sectional schematic diagram of a substrate of an antenna involved in an embodiment of the present utility model.

[0026] Figure 6 It is a schematic structural diagram of the rear shell involved in the embodiment of the utility model when the antenna is fixed to the inner side of the rear shell by means of attachment and assembly.

[0027] Figure 7 It is a schematic diagram of the partial structure of the rear shell involved in the embodiment of the utility model when the antenna is fixed to the inner side of the rear shell by attachment and assembly.

[0028] Figure 8 The schematic diagram of the structure of the rear shell involved in the embodiment of the present utility model is when the antenna is attached and fixed to the inner side of the rear shell through the in-mold injection molding process.

[0029] Fig. 9 This is a schematic structural diagram of a position on a fixing plate used for connecting with an antenna and provided with a corresponding spring piece according to an embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 1. Front frame, 11. Display opening, 2. Back shell, 3. Display panel, 4. Circuit board, 401. First area, 402. Second area, 5. Antenna, 51. Substrate, 511. Base film, 512. Conductive layer, 513. Protective layer, 514. Insulating layer, 515. Connecting layer, 501. Near-field sensing antenna, 502. Bluetooth antenna, 503. 4G antenna, 504. GPS antenna, 52. Induction coil, 53. Binding pin, 6. Fixing plate, 61. Bar slot, 62. Card slot, 7. Shrapnel, 8. Battery, 9. Battery cover. DETAILED DESCRIPTION

[0032] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale.

[0033] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0034] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0035] With the rapid development of Internet of Things technology, electronic ink screens have been gradually applied to application scenarios such as smart education, smart transportation, smart medical care, smart office, and smart retail. Display modules using electronic ink screens usually have wireless communication to enhance user experience, such as Near Field Communication (NFC), and other wireless communication functions can also be set, such as Bluetooth communication or private wireless communication.

[0036] like Figure 1 As shown, the display module includes a shell, a display panel 3 and a circuit board 4. The shell generally includes a front frame 1 and a rear shell 2. The display panel 3 has a display surface and a non-display surface that are relatively arranged. The display surface of the display panel 3 is arranged close to the inner side of the front frame 1, and the circuit board 4 is arranged on the side of the display panel 3 away from the front shell, that is, the non-display surface of the display panel 3 is arranged close to the circuit board 4, and the rear shell 2 is arranged on the side of the circuit board 4 away from the front frame 1.

[0037] At present, the antenna 5 is mostly set on the circuit board 4. The circuit board 4 needs to reserve a setting area for the antenna 5, which increases the area of ​​the circuit board 4. The circuit board 4 is set close to the non-display surface of the display panel 3. The non-display surface of the display panel 3 is provided with a driving circuit. The antenna 5 is close to the driving circuit and is easily affected by the driving circuit, resulting in a short sensing distance of the antenna 5 and a poor user experience.

[0038] Based on this, the present utility model provides a backlight module. Figures 2 to 9 As shown, the display module includes a shell, a display panel 3, a circuit board 4 and an antenna 5, the shell has a display opening 11; the display panel 3 is arranged on the inner side of the shell, and the display surface of the display panel 3 is exposed from the display opening 11; the circuit board 4 is arranged on the non-display surface of the display panel 3; the antenna 5 is adhered and fixed to the inner side of the shell, the antenna 5 is electrically connected to the circuit board 4, the antenna 5 includes a substrate 51 and an induction coil 52, the substrate 51 is adhered and fixed to a side of the shell close to the display panel 3 or a side close to the circuit board 4, and the induction coil 52 is arranged on a side of the substrate 51 away from the shell.

[0039] The circuit board 4 is arranged on the non-display surface of the display panel 3, and the antenna 5 is attached and fixed to the inner side of the housing. The antenna 5 includes a substrate 51 and an induction coil 52. The antenna 5 is attached and fixed to the housing through the substrate 51. It can be understood that the antenna 5 is close to the display surface of the display panel 3 or is located on the side of the circuit board 4 away from the non-display surface. The driving circuit is usually located on the non-display side of the display panel 3. Therefore, the antenna 5 has a certain distance from the driving circuit, completely avoiding the driving circuit of the display panel 3, and avoiding the problem of the antenna 5 being interfered by the driving circuit. The near-field sensing distance of the display module antenna 5 is increased, and the user experience is improved.

[0040] It can be understood that after the antenna 5 is attached and fixed to the inner side of the outer shell, there is no need to reserve an area for setting the antenna 5 on the circuit board 4. This can reduce the area of ​​the circuit board 4, save the board material of the circuit board 4, and reduce the production cost of the display module. At the same time, it can also reduce the overall circuit layout space of the display module, providing the possibility for a better appearance design of the display module.

[0041] The display module involved in the implementation of the utility model is described in detail below with reference to specific embodiments.

[0042] See also Figure 1 The display module includes a housing, the housing includes a front frame 1 and a rear shell 2, the front frame 1 and the rear shell 2 are buckled together to form a storage space, and the display module also includes a display panel 3, a circuit board 4 and an antenna 5, and the display panel 3, the circuit board 4 and the antenna 5 are arranged in the storage space. A display opening 11 is provided on the front frame 1, the display panel 3 is arranged on the inner side of the front frame 1, and the display surface of the display panel 3 is exposed in the display opening 11. The display module may also include a battery 8 and a battery cover 9, the battery cover 9 is arranged on the side of the rear shell 2 away from the front frame 1, and the battery cover 9 and the rear shell 2 together form an installation space for the battery 8.

[0043] like Figure 2 The antenna 5 shown can be a near-field sensing antenna 501. When the antenna 5 is a near-field sensing antenna 501, the antenna 5 is arranged around the periphery of the opening, and the antenna 5 is located at the periphery of the display panel 3. The area of ​​the front shell between the antenna 5 and the opening is the overlapping area. The display panel 3 has a display area and a non-display area. The display area overlaps with the overlapping area, and the display area is exposed outside the opening.

[0044] The antenna 5 is attached and fixed to a surface of the front frame 1 close to the display side of the display panel 3, that is, the attached surface of the antenna 5 and the display panel 3 and the display surface of the display panel 3 are located in the same plane. The antenna 5 completely avoids the driving circuit of the display panel 3, avoiding the problem of the antenna 5 being interfered by the driving circuit. The near-field sensing distance of the antenna 5 of the display module is increased, and the sensing distance can reach more than 5 cm.

[0045] like Figure 3 As shown, when the antenna 5 is arranged on the circuit board 4, the circuit board 4 needs to be provided with a first area 401 and a second area 402. The first area 401 is used to connect the driver chip and other electronic components, and the second area 402 is used to connect the antenna 5. Figure 3 The area of ​​the circuit board 4 shown is S1. Figure 4 As shown, when the antenna 5 is arranged on the housing, there is no need to arrange the second area 402 to connect the antenna 5, and the area size of the circuit board 4 is Figure 4 S2 shown, Figure 4 The area S2 of the circuit board 4 is Figure 3 The area S1 of the middle circuit board 4 can be reduced by 1 / 4, which can effectively save the area of ​​the circuit board 4 and provide the possibility for a better appearance design of the display module.

[0046] A network analyzer was used to Figure 3 and Figure 4 By testing the frequency band of the antenna 5 in the case, it can be found that the antenna 5 is not affected by placing it on the housing. The area on the circuit board 4 where the antenna 5 is placed can be omitted, which can reduce the area of ​​the circuit board 4 and save the board material of the circuit board 4.

[0047] The circuit board 4 is arranged on a side of the front frame 1 where the display panel 3 is away from the display panel 3 and the antenna 5. The antenna 5 includes a substrate 51 and an induction coil 52. The substrate 51 is attached to and fixed to a surface of the front frame 1 close to the display side of the display panel 3. The induction coil 52 is arranged on a side of the substrate 51 away from the front frame 1. The antenna 5 may also include a binding pin 53, which is connected to the induction coil 52. A spring 7 is arranged on a side of the circuit board 4 close to the antenna 5, and the spring 7 is pressed tightly on the binding pin 53.

[0048] In other achievable embodiments, the circuit board 4 can be bound together with the binding pin 53 by connecting the wires of the flexible circuit board. Considering that the display panel 3 is an electronic ink screen, the internal wiring space of the display device using the electronic ink screen is limited, and the wiring of the flexible circuit board is difficult, and the cost of the flexible circuit board is relatively high. Therefore, the spring sheet 7 is preferably used to contact the binding pin 53, which controls the cost of connecting the antenna 5 and the circuit board 4 while ensuring the reliability of the connection between the antenna 5 and the circuit board 4.

[0049] It should be noted that the material of the front frame 1 and the rear shell 2 is usually plastic, and the antenna 5 is combined with the plastic shell. The antenna 5 can be attached to the front frame 1 through adhesive. However, the method of attaching the antenna 5 to the front frame 1 requires high positioning accuracy. The antenna 5 is integrally formed with the front frame 1 through an in-mold decoration (IMD) process, which can reduce the cost of combining the antenna 5 with the front frame 1.

[0050] like Figure 5 As shown, the substrate 51 includes a base film 511, a conductive layer 512, a protective layer 513, an insulating layer 514 and a connecting layer 515 which are stacked in sequence. The connecting layer 515 is tightly combined with the housing during injection molding. The induction coil 52 is arranged on the side of the base film 511 away from the connecting layer 515, and the induction coil 52 is connected to the conductive layer 512 through a via. The conductive layer 512 may be made of silver, which is mainly used to form the functional area of ​​the antenna 5. The protective layer 513 is made of carbon, which is mainly used to protect the contact points of the conductive layer 512 from being scratched and oxidized. The insulating layer 514 is mainly used to insulate and protect the circuit formed by the conductive layer 512. The connecting layer 515 is mainly used to tightly combine the substrate 51 with the front frame 1 during injection molding.

[0051] The process of integrally molding the antenna 5 and the front frame 1 through an in-mold decoration (IMD) process is as follows: printing→baking→punching→semi-finished product electrical testing→in-mold decoration→finished product electrical testing.

[0052] Printing is mainly based on the layer structure of the substrate 51, the characteristics of each layer, and the selection of the corresponding mesh and material of the screen. Figure 5 The layer structure shown is hierarchically printed with functional circuits.

[0053] The baking is mainly used to enhance the adhesion between the silver paste of the conductive layer 512 and the base film 511 , volatilize the solvent components in the silver paste of the conductive layer 512 , and stabilize the resistance of the conductive layer 512 .

[0054] It is necessary to connect the induction coil 52 with the circuit of the conductive layer 512, so it is necessary to set a via hole passing through the protective layer 513, the insulating layer 514 and the connecting layer 515. When forming the via hole, a CCD camera is used for automatic scanning to quickly and accurately punch holes on the substrate 51, thereby improving the timeliness and accuracy of the subsequent punching of the substrate 51.

[0055] The electrical testing of semi-finished products mainly involves the electrical function testing of the substrate 51 before it is formed, including voltage resistance, resistance, insulation, short circuit and breaking performance.

[0056] In-mold injection molding includes printing circuits on the base film 511 and injection molding the connection layer 515 and the front frame 1 together.

[0057] The finished product electrical test is to test the electrical performance of the antenna 5.

[0058] like Figure 6 and Figure 7 As shown, the display module also has a Bluetooth antenna 502, a 4G antenna 503, a GPS antenna 504, a WiFi antenna and an RFID antenna, etc. Figure 6 The Bluetooth antenna 502, WiFi antenna, RFID antenna, 4G antenna 503 and GPS antenna 504 in the device all use FPC antennas, which is equivalent to pulling out the line of the antenna 5 on the circuit board 4 and using other external metals to make the antenna 5. The signal of the antenna 5 needs to be debugged, and various types of antennas 5 need to be attached and assembled, and the operability of assembly and attachment needs to be considered. Figure 7 for Figure 6 A partial enlarged view of the location of the 4G antenna 503, from Figure 7 It can be seen that the 4G antenna 503 obviously protrudes from the surface of the rear shell 2 close to the front frame 1.

[0059] In order to ensure the consistency of RF performance and reduce the production process, after the RF debugging is completed, consider applying the in-mold injection molding process to the Bluetooth antenna 502, WiFi antenna, RFID antenna, 4G antenna 503 and GPS antenna 504, which can reduce the assembly error caused by assembly and improve production efficiency. Figure 8 As shown, the antenna 5 can also be attached and fixed to the side of the rear shell 2 close to the circuit board 4 by using an in-mold injection molding process. Fig. 9As shown, a spring sheet 7 is provided on one side of the circuit board 4 close to the rear housing 2 , and the spring sheet 7 is brought into contact with the binding pin 53 of the antenna 5 , thereby ensuring good contact between the antenna 5 and the circuit board 4 .

[0060] like Fig. 9 As shown, a fixing plate 6 is provided on one side of the circuit board 4 close to the rear housing 2, and a corresponding spring piece 7 is provided at a position connected to the antenna 5 on the fixing plate 6. The spring piece 7 can be made of Fig. 9 The structure shown. A strip groove 61 is provided in the middle of the fixing plate 6, and the lead of the display panel can pass through the strip groove 61 and be bound together with the conductive part on the back of the circuit board 4. A card slot 62 is provided on the periphery of the fixing plate 6, and it can be connected with the card connection part on the front frame 1 or the rear shell 2 through the card slot 62. The fixing plate 6 is also provided with a through hole, and a stud can be used to pass through the through hole to connect with the circuit board, so that the spring piece 7 on the fixing plate 6 and the binding pin of the antenna 5 are tightly combined.

[0061] The present utility model provides an electronic device, which may include the display module mentioned in any one of the above items of the present disclosure, and the structure of the electronic device may refer to the display module, and the structure of the display module will not be described in detail here.

[0062] It should be noted that, in addition to the display module, the electronic device may also include other necessary components and components, such as a power cord, a camera, a microphone, an earpiece and a speaker, etc. Those skilled in the art may make corresponding supplements based on the specific usage requirements of the electronic device, which will not be repeated here.

[0063] The electronic devices may be traditional electronic devices, such as mobile phones, watches, computers, televisions, and camcorders, or emerging wearable devices, such as VR glasses, which are not listed here one by one.

[0064] This application is intended to cover any variation, use or adaptation of the utility model, which follows the general principles of the utility model and includes common knowledge or customary technical means in the technical field that are not applicable to the utility model. The description and implementation methods are only considered as exemplary, and the true scope and spirit of the utility model are indicated by the claims.

[0065] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A display module, characterized in that: include: a housing having a display opening; A display panel is disposed on the inner side of the housing, and a display surface of the display panel is exposed from the display opening; A circuit board, arranged on the non-display surface of the display panel; An antenna is adhered and fixed to the inner side of the shell, the antenna is electrically connected to the circuit board, the antenna includes a substrate and an induction coil, the substrate is adhered and fixed to a side of the shell close to the display panel or a side close to the circuit board, and the induction coil is arranged on a side of the substrate away from the shell.

2. The display module according to claim 1, characterized in that: The housing comprises a front frame, the display opening is arranged on the front frame, the antenna is arranged at the periphery of the display panel, and the antenna is attached to and fixed on a surface of the front frame close to the display side of the display panel.

3. The display module according to claim 1, characterized in that: The shell is an injection molded part, and the antenna is combined with the shell through an injection molding process.

4. The display module according to claim 3, characterized in that: The substrate includes a base film, a conductive layer, a protective layer, an insulating layer and a connecting layer stacked in sequence. The connecting layer is tightly combined with the shell during injection molding. The induction coil is arranged on a side of the base film away from the connecting layer, and the induction coil is connected to the conductive layer through a via.

5. The display module according to claim 3, characterized in that: The antenna further comprises a binding pin, and a spring sheet is provided on a side of the circuit board close to the antenna, and the spring sheet is pressed tightly onto the binding pin.

6. The display module according to claim 1, characterized in that: The antenna is attached to the housing via adhesive.

7. The display module according to claim 1, characterized in that: The antenna is a near-field induction antenna.

8. The display module according to claim 1, characterized in that: The area between the antenna and the opening is an overlap area. The display panel has a display area and a non-display area. The display area overlaps the overlap area, and the display area is exposed outside the opening.

9. The display module according to claim 1, characterized in that: The housing further comprises a rear housing, and the antenna is attached to and fixed on a side of the rear housing close to the circuit board.

10. The display module according to claim 9, characterized in that: A fixing plate is provided on one side of the circuit board close to the rear shell, and a strip groove is provided on the fixing plate. The lead wires of the display panel pass through the strip groove and are bound to the conductive part of the circuit board close to the rear shell.

11. The display module according to claim 1, characterized in that: The display panel is an electronic ink screen.

12. An electronic device, characterized in that: A display module comprising any one of claims 1 to 11.

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