CN218938923U - Display module - Google Patents

Abstract

The utility model provides a display module, which relates to the field of displays and comprises touch glass, a shielding film, a light guide assembly and a backlight assembly which are sequentially arranged along one direction, wherein one end of the shielding film is grounded, and the other end of the shielding film is contacted with the touch glass. Through setting up the shielding film between touch-control glass and light guide subassembly, even produce the voltage difference between touch-control glass and the light guide subassembly, this voltage difference also can be isolated and can not pass the light guide subassembly through the shielding film, and then because shielding film and light guide subassembly all ground connection, consequently can not have the voltage difference between shielding film and the light guide subassembly, and then help avoiding producing the electric field between touch-control glass and light guide subassembly, effectively alleviate the light guide subassembly that is located between touch-control glass and the light guide subassembly because the electric field between touch-control glass and the light guide subassembly leads to the problem of howling.

Description

Display module

Technical Field

The utility model relates to the field of displays, in particular to a display module.

Background

Touch screens are now widely used in most electronic devices. Electronic devices with touch screens generally have a touch panel and a display, and may have both a touch function and a display function. The display is generally configured as a liquid crystal display, the liquid crystal display includes a display screen and a light guide assembly, the display screen is disposed at the outermost side of the liquid crystal display and is in a glass form for displaying images, and the backlight module is disposed at the inner side of the display screen and is used as an internal light-emitting source of the liquid crystal display for providing light with sufficient brightness and uniform distribution for displaying images on the display screen.

In the prior art, when an electronic device with a touch screen is in an operating state, the operating voltage of the touch glass is not 0, but the operating voltage of the backlight assembly is 0. In this case, a voltage difference exists between the backlight assembly and the touch panel, and the voltage difference generates an electric field between the backlight assembly and the touch panel, so that the light guide assembly between the backlight assembly and the touch panel is driven to emit mechanical vibration (also referred to as howling), which affects the hearing experience of the user.

Accordingly, there is a need for a display module to solve the technical problem that the display module (such as an electronic device with a touch screen) can be whistled in a working state.

Disclosure of Invention

The utility model provides a display module, which solves the technical problem that the display module can be whistled in a working state.

In a first aspect, the present utility model provides a display module, including a touch glass, a shielding film, a light guide assembly, and a backlight assembly sequentially arranged along a direction, where the backlight assembly is grounded, a working voltage of the touch glass is not 0, a first end of the shielding film is used for grounding, and a second end of the shielding film contacts the touch glass.

In the above design, through setting up the shielding film between touch glass and light guide subassembly, even touch glass's operating voltage is not 0 and leads to producing the voltage difference between touch glass and the backlight unit, this voltage difference also can be isolated and can not pass light guide subassembly through the shielding film, and then because shielding film and backlight unit all ground connection, can not have the voltage difference between shielding film and the backlight unit, just also can avoid producing the electric field between shielding film and the backlight unit for the light guide unit that is in between shielding film and the backlight unit can not produce mechanical vibration. Therefore, the design can solve the howling problem caused by inconsistent voltages of the touch glass and the backlight assembly in the display module.

In one possible design, the display module may further include a flexible circuit board, the first end of the shielding film being electrically connected to the first end of the flexible circuit board, and the second end of the flexible circuit board being grounded.

Through the design, the touch glass can be grounded through the flexible circuit board, and the flexible circuit board belongs to an original component in the display module, namely, the design can realize the grounding of the touch glass on the basis of not adding a new device, and the complexity of the display module is reduced.

In one possible design, the display module may further include a conductive medium, the first end of the shielding film and the first end of the flexible circuit board being connected by the conductive medium.

Through the design, the voltage on the electric film can be transmitted to the flexible circuit board through the conductive medium, and the conductive medium is simple in structure and low in cost, so that the structural complexity and cost of the display module can be reduced.

In one possible design, the flexible circuit board is slotted on one side with respect to the conductive medium, with the metal exposed inside the slot and the conductive medium embedded in the slot of the conductive medium.

Through the design, through slotting the covering film wrapped outside the flexible circuit board, metal inside the flexible circuit board can be exposed, and therefore, the conductive medium is embedded into the slotting, and the electrical connection between the conductive medium and the flexible circuit board can be realized. And the slotting can not increase new occupied space, thereby being beneficial to the integration and miniaturization of the display module.

In one possible design, the flexible circuit board is grounded through pins.

Through the design, the pin of the flexible circuit board is connected with the ground to form a closed loop with the ground, so that the voltage of the flexible circuit board is zero, and the voltage difference between the touch glass and the backlight assembly can be avoided.

In one possible design, the shielding film is realized by indium tin oxide material. Therefore, the voltage of the touch glass and the voltage difference generated by the backlight component can be effectively isolated by utilizing the shielding effect of the indium tin oxide material.

In one possible design, the shielding film is realized by a transparent material. Therefore, the high photoelectric property of the transparent shielding film can be utilized, so that the light emitted by the light source can completely penetrate through the shielding film as much as possible, and then the light can completely strike the touch glass.

In one possible design, the shielding films are disposed along a tiled connection of the touch glass. Specifically, the second end of the shielding film may be a film plane of the shielding film, which is equal in size to the touch glass. Therefore, the contact area of the shielding film and the touch glass is increased as much as possible, and the voltage action of the touch glass on the light guide assembly can be effectively shielded.

In one possible design, the light guide assembly may further include a light guide plate, a lower surface of which is connected to an upper surface of the backlight assembly. The light guide plate can convert the point light source into a surface light source and finally display the surface light source to the touch glass.

In one possible design, the display module may further include a rubber frame disposed between the flexible circuit board and the backlight assembly, so as to avoid the problem that the flexible circuit board is damaged due to direct connection of the backlight assembly and the flexible circuit board, and to play a certain role in buffering the flexible circuit board.

In a second aspect, the present application further provides an electronic device, including a display module set designed according to any one of the first aspect.

The technical effects achieved by the second aspect may be referred to the description of the beneficial effects in the first aspect, and the detailed description is not repeated here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a display module in an electronic device according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of an internal display module according to an embodiment of the utility model;

FIG. 3 is a schematic diagram of an internal structure of a flexible circuit in a display module according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an internal structure of a flexible circuit in a display module according to another embodiment of the present utility model;

fig. 5 is a schematic diagram of the inside of a conductive medium according to an embodiment of the present utility model.

Detailed Description

For the purpose of promoting an understanding of the principles and advantages of this application, reference will now be made in detail to the drawings, in which it is apparent that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present utility model based on the embodiments herein.

Touch screen input is now an emerging computer input mode which is most popular with common people of users after keyboard input, mouse input, handwriting input and voice input. By adopting the technical input mode, a user can realize the operation control of the host computer only by lightly touching the icon or the text on the display screen of the computer with a finger, so that the man-machine interaction is more straightforward. The technology also greatly facilitates the operation of users.

At present, the touch screen realizes touch and display functions through the display module. However, in the current design of the display module, when the display module is in a working state, an electric field is generated inside the display module, and the electric field makes the backlight film material in the display module mechanically vibrate, so that the display module is in a whistling phenomenon.

In view of the above, the embodiment of the utility model provides a display module, which is suitable for electronic equipment with a touch screen, such as a mobile phone, a notebook computer, a tablet computer, a wearable device, a bluetooth headset and the like, and the related devices with voltage differences in the display module are isolated by adding a shielding film on the original display module design process, so that an electric field is avoided in the display module, and the problem of howling caused by the electric field is relieved.

Fig. 1 schematically illustrates a structural schematic diagram of a display module provided by an embodiment of the present utility model in an electronic device as a whole, where fig. 1 (a) illustrates a front view of the electronic device, and fig. 1 (B) illustrates a side view of the electronic device. As shown in fig. 1 (a) and fig. 1 (B), the electronic device includes a front view and a side view of the display module in the electronic device, and a shielding film is added under the original touch glass in the display module shown in fig. 1 to be located at the bottom of the electronic device, so that a closed loop is formed by connecting the voltage on the touch glass with a grounded flexible circuit board, and the possibility of howling is solved.

It should be understood that the display module positions shown in fig. 1 are only one example. In other scenarios, the display module may be located at other positions of the electronic device, for example, may be located at a side of the electronic device, may be located at an upper portion of the electronic device, or may be located at a middle position of the electronic device, which is not limited in particular.

Fig. 2 is an internal schematic view of a display module according to an embodiment of the present utility model, that is, an enlarged view of a circle in the side view of fig. 1.

As shown in fig. 2, the display module includes a touch glass 101, a shielding film 102, a light guide assembly 107, and a backlight assembly 108 sequentially arranged along one direction. The touch glass 101 is a glass screen with a touch function, and the working voltage is not 0. The shielding film 102 is a film having a conductive function, and may specifically be a film made of a conductive medium, for example, a metal such as gold, silver, copper, platinum, aluminum, chromium, or rhodium, or a mixture of these metals, or a nonmetal such as conductive plastic, conductive rubber, conductive fiber fabric, conductive paint, or conductive adhesive. The second end (a 2) of the shielding film contacts the touch glass 101. The light guide member 107 is disposed between the backlight assembly 108 and the shielding film 102, and serves to convert an electric light source into a surface light source and finally present the surface light source to the touch glass 101. The backlight assembly 108 is made of metal material, has a certain hardness, and can effectively protect the light guide assembly 107 located on the upper side of the backlight assembly.

Thus, even though the operating voltage of the touch glass 101 is not 0, it is in contact with the shielding film 102, and the shielding film 102 has the function of shielding voltage, and at the same time, the first end thereof is connected to the ground, so that the potential of the shielding film 102 is maintained at 0 potential, and thus, since the shielding film 102 and the backlight assembly 108 are both connected to the ground, there is no voltage difference between the touch glass 101 and the backlight assembly 108, and thus, no electric field is generated, and no mechanical vibration is generated in the light guide assembly 107 between the touch glass 101 and the backlight assembly 108. Therefore, the design can solve the problem of howling caused by inconsistent voltages of the touch glass 101 and the backlight assembly 108 in the display module.

The arrangement direction of the touch glass 101, the shielding film 102, the light guide member 107, and the backlight member 108 may be, for example, a top-to-bottom direction as illustrated in fig. 2, a bottom-to-top direction, a left-to-right direction, a right-to-left direction, or a direction inclined along a certain straight line or curve, and the like, and is not particularly limited.

As an example, with continued reference to fig. 2, the touch glass 101 may specifically include an upper glass, a touch panel, and a lower glass, wherein a lower surface of the upper glass is closely attached to an upper surface of the touch panel, a lower surface of the touch panel is closely attached to an upper surface of the lower glass, and the upper glass, the touch panel, and the lower glass may be enclosed in one glass frame. When the display module is in operation, the touch panel performs a scanning operation to generate a voltage of 0 or less on the touch glass 101, that is, the touch panel scans the liquid crystal between the upper glass and the lower glass to generate a voltage.

In one possible embodiment, with continued reference to fig. 2, the display module may further include a flexible circuit board (flexible printed circuit, FPC) 104, a first end of the flexible circuit board 104 being electrically connected to the first end a1 of the shielding film, and a second end of the flexible circuit board 104 being grounded. Thus, the non-zero working voltage on the touch glass 101 can be transmitted to the flexible circuit board 104 through the shielding film 102, and then grounded through the flexible circuit board 104. In the design, the flexible circuit board is an inherent component in the display module, and the grounding of the touch glass is realized by utilizing the grounding of the inherent component, so that other devices are not required to be additionally arranged, the howling is solved, the circuit complexity of the display module is not influenced, and the cost is not increased.

Illustratively, with continued reference to FIG. 2, the flexible circuit board 104 may be a sheet of bent cross-section having a length approximately half the length of the shielding film 102, one side of the sheet being in close proximity to the shielding film 102 and the bent point distal end of the other side contacting the upper surface of the light guide assembly 107. Wherein the bent shape may be as shown in FIG. 2

Other shapes are also possible, and are not particularly limited.

In one possible embodiment, the flexible circuit board 104 is slotted with respect to one end of the conductive medium 103 (i.e., the first end of the flexible circuit board 104), the interior metal is exposed within the slot, and the conductive medium 103 is embedded in the slot so as to make electrical connection between the flexible circuit board 104 and the conductive medium 103. As shown in fig. 3, the outer surface of the flexible circuit board 104 is covered with a cover film, which is insulating and has no conductivity, so that the flexible circuit board 104 needs to be grooved to expose the internal metal. The shape of the slot may be a concave shape, or may be other shapes, and the position of the slot may be a middle position of the flexible circuit board 104, or may be other positions, which is not limited specifically.

In one possible implementation, the flexible circuit board 104 is grounded through pins. The second end of the flexible circuit board is used for grounding, and the grounding is performed through the setting pins. As shown in fig. 4, fig. 4 is a schematic diagram of an internal structure of a flexible circuit in another display module according to an embodiment of the utility model. Inside the flexible circuit board 104 is a metal wiring having a positive electrode and a negative electrode, and only the set pin is connected to the ground, so that the transferred voltage can be transferred to the ground, thereby forming a closed loop.

Illustratively, with continued reference to fig. 2, the display module may further include a light source 106, the lower surface of the flexible circuit board being grooved, the light source 106 being embedded in the groove. When the display module works, the light source 106 can emit light signals, and the signals are finally transmitted to the touch glass 101 through various components in the display device, so that the touch glass emits light.

Illustratively, with continued reference to FIG. 2, the light source 106 may be disposed within the backlight assembly 108, and the backlight assembly 108 may be embodied in the form of a bezel in which the light source 106 is fixedly coupled to the backlight assembly by being affixed.

As further shown in fig. 2, the light guide assembly may further include a light guide plate, and further, the light guide assembly may further include a light enhancement sheet, a diffusion sheet, and a reflection sheet. The lower surface of the light enhancement sheet is connected to the upper surface of the diffusion sheet, the lower surface of the diffusion sheet is connected to the upper surface of the light guide plate, the lower surface of the light guide plate is connected to the upper surface of the reflection sheet, and the lower surface of the reflection sheet is connected to the upper surface of the backlight assembly 108. The light-increasing sheet is used for increasing light, the diffusion sheet is used for diffusing the light emitted by the light source 106 to be uniformly distributed so as to convert the point light source into a surface light source, and the reflecting sheet is used for reflecting the light which is not reflected by the light guide plate. In general, the light source 106 of the display module is a light emitting diode (Light Emitting Diode, LED), the LED belongs to a point light source, and a light signal emitted by the point light source is transmitted to the touch glass 101 through the reflective sheet, the light guide plate, the diffusion sheet and the light enhancement sheet in sequence, and the light source cannot be point by point, so the light guide plate converts the point light source into a planar light source.

As an example, with continued reference to fig. 2, the display module may further include a plastic frame 105, where a first end of the plastic frame 105 is connected to a second end of the flexible circuit board 104, and a second end of the plastic frame 105 is connected to the backlight assembly 108, where the plastic frame is used to isolate the flexible circuit board 104 from the backlight assembly 108, so as to avoid the two components from touching due to direct contact.

In one possible embodiment, with continued reference to fig. 2, the display module may further include a conductive medium 103, a first end of the conductive medium 103 being electrically connected to the first end of the shielding film 102, and a second end of the conductive medium 103 being electrically connected to the first end of the flexible circuit board 104. The conductive medium 103 is a medium for connecting the shielding film 102 and the flexible circuit board 104.

In the embodiment of the present utility model, there are various possible structures of the conductive medium, and, for example, fig. 5 shows a schematic structural diagram of one conductive medium provided in the embodiment of the present utility model, as shown in fig. 5, the conductive medium specifically includes a medium 1, a medium 2, and a light shielding medium, where the medium 1 and the medium 2 have a conductive function, and the light shielding medium has a light shielding function in addition to the conductive function, so that an optical signal sent by the light source 106 is prevented from being transmitted to the touch glass 101 through the conductive medium 103. In one example, the conductive medium 103 may be a black glue with a conductive effect, in which case the medium 1 may be a sub-stricken glue layer 1, the medium 2 may be a sub-stricken glue layer 2, and the light shielding medium may be a black film, or may be other mediums, which is not limited specifically.

In one possible implementation, the shielding film 102 may be implemented by an indium tin oxide material. Since indium tin oxide is a semiconductor material and has a good conductive effect, the use of indium tin oxide material for preparing the shielding film 102 can improve the conductivity of the shielding film 102.

The shielding film 102 may be made of indium tin oxide material, or may be made of a mixture of indium tin oxide material and other metal or nonmetal materials, which is not limited herein.

In one possible embodiment, the shielding film 102 may be implemented by a transparent material. Wherein the transparent material has a transmittance of 95% or more for visible light, a reflectance of 70% or more for infrared light, an absorptivity of 85% or more for ultraviolet light, and an attenuation rate of 85% or more for microwaves. In this way, the shielding film 102 is prepared by using the transparent material, so that the shielding film 102 can have better visibility, and is beneficial to transmitting and transmitting optical signals to the final touch glass 101. It should be noted that, the shielding film 102 may be made of a translucent material, or may be made of a completely transparent material, which is not limited in particular.

In one possible embodiment, the shielding film 102 may be disposed around the periphery of the touch glass 101. The shielding film 102 may be in a rectangular shape, and is equal to the touch glass 101 in size and is tiled on the touch glass.

The embodiment of the utility model provides a display module, which comprises touch glass, a shielding film, a light guide assembly and a backlight assembly which are sequentially arranged along one direction, wherein the backlight assembly is grounded, the working voltage of the touch glass is not 0, the first end of the shielding film is used for grounding, and the second end of the shielding film is contacted with the touch glass.

Although the operating voltage of the touch glass is not 0, the touch glass is in contact with the shielding film, and the voltage difference between the touch glass and the backlight assembly is not generated, so that an electric field is prevented from being generated between the shielding film and the backlight assembly, and the light guide assembly between the shielding film and the backlight assembly is prevented from generating mechanical vibration. Therefore, the design can solve the howling problem caused by inconsistent voltages of the touch glass and the backlight assembly in the display module.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A display module, comprising: the touch glass, the shielding film, the light guide assembly and the backlight assembly are sequentially arranged along one direction, the backlight assembly is grounded, and the working voltage of the touch glass is not 0;

the first end of the shielding film is used for grounding, and the second end of the shielding film contacts the touch glass.

2. The display module assembly of claim 1, further comprising: a flexible circuit board; the first end of the shielding film is electrically connected with the first end of the flexible circuit board, and the second end of the flexible circuit board is grounded.

3. The display module assembly of claim 2, further comprising: a conductive medium;

the first end of the shielding film and the first end of the flexible circuit board are connected through the conductive medium.

4. A display module according to claim 3, wherein the flexible circuit board is slotted with respect to one side of the conductive medium, the slot being internally exposed to metal, the conductive medium being embedded in the slot.

5. The display module of claim 3, wherein the flexible circuit board is grounded via a pin.

6. The display module of any one of claims 1 to 5, wherein the shielding film is implemented by an indium tin oxide material.

7. The display module of any one of claims 1 to 5, wherein the shielding film is implemented by a transparent material.

8. The display module of any one of claims 1-5, wherein the shielding film is tiled on one side of the touch glass.

9. The display module of any one of claims 1 to 5, wherein the light guide assembly comprises a light guide plate;

the lower surface of the light guide plate is connected to the upper surface of the backlight assembly.

10. The display module assembly of any one of claims 2 to 5, further comprising: a rubber frame;

the adhesive frame is disposed between the flexible circuit board and the backlight assembly.

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