CN111107204B - Touch screen assembly and mobile terminal - Google Patents
Touch screen assembly and mobile terminal Download PDFInfo
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- CN111107204B CN111107204B CN201911407571.6A CN201911407571A CN111107204B CN 111107204 B CN111107204 B CN 111107204B CN 201911407571 A CN201911407571 A CN 201911407571A CN 111107204 B CN111107204 B CN 111107204B
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- Prior art keywords
- touch screen
- conductive wall
- circuit board
- screen assembly
- conductive
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0277—Details of the structure or mounting of specific components for a printed circuit board assembly
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0054—Casings specially adapted for display applications
Abstract
The application relates to a touch screen assembly and a mobile terminal, the touch screen assembly comprises: a conductive ground plate; a flexible circuit board disposed on the conductive ground plate, the flexible circuit board including a chip mounting portion and a first extension portion connected to each other; the conductive wall is arranged on the conductive grounding plate, surrounds the chip mounting part, and is provided with a first opening at the joint with the first extension part so that the first extension part passes through the conductive wall; a touch chip mounted on the chip mounting portion; the shielding cover is fixed on the conductive wall and covers the touch chip, so that the shielding cover, the conductive wall and the conductive grounding plate can jointly form a shielding structure of the touch chip, interference of electromagnetic wave radiation generated by the touch chip on antenna signal receiving work is reduced, and antenna receiving sensitivity is improved.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a touch screen assembly and a mobile terminal.
Background
With the continuous development of communication technology, mobile terminals (such as mobile phones) are increasingly popularized in daily life of people, and with the progress of science and technology, the mobile terminals mostly adopt touch screens for human-computer interaction.
Currently, a touch screen in a mobile terminal is generally connected to a printed circuit board through a flexible circuit board integrated with a touch chip, wherein the touch chip is soldered on the flexible circuit board.
However, the touch chip mounted on the flexible circuit board is directly exposed outside, and when the touch chip works, electromagnetic waves are radiated outwards, so that interference is caused to the receiving antenna working around the touch chip, and the receiving sensitivity of the antenna is reduced.
Disclosure of Invention
An object of the application is to provide a touch-sensitive screen subassembly and mobile terminal, can reduce the electromagnetic wave radiation that the touch-control chip produced and to the interference of antenna signal reception work, and then improve antenna receiving sensitivity.
In order to solve the above problem, an embodiment of the present application provides a touch screen assembly, including: a conductive ground plate; a flexible circuit board disposed on the conductive ground plate, the flexible circuit board including a chip mounting portion and a first extension portion connected to each other; the conductive wall is arranged on the conductive grounding plate, surrounds the chip mounting part, and is provided with a first opening at the joint with the first extension part so that the first extension part passes through the conductive wall; a touch chip mounted on the chip mounting portion; and the shielding cover is fixed on the conductive wall and covers the touch chip.
Wherein the shielding cover is arranged on the top of the conductive wall.
The outer side surface of the conductive wall is provided with a positioning groove, the inner side wall of the shielding cover is provided with a positioning block, and the positioning block is accommodated in the positioning groove so as to fix the shielding cover on the conductive wall.
Wherein the shape and size of the shielding cover are matched with those of the conductive walls.
The flexible circuit board further comprises a second extending part connected with the chip mounting part, and a second opening is formed in the joint of the conductive wall and the second extending part, so that the second extending part penetrates through the conductive wall.
The touch screen assembly further comprises a touch screen, the touch screen is electrically connected with the first extending portion, the second extending portion is electrically connected with an external printed circuit board, and the printed circuit board is used for providing working voltage for the touch screen assembly.
Wherein, the thickness range of the shielding cover is 0.15 mm-0.2 mm.
Wherein, the height of the conductive wall is not less than the thickness of the flexible circuit board.
In order to solve the above problem, an embodiment of the present application further provides a mobile terminal, where the mobile terminal includes a housing, a printed circuit board, and any one of the above touch screen assemblies, the printed circuit board is located between the touch screen assembly and the housing, the touch screen assembly is electrically connected to the printed circuit board, and the printed circuit board is configured to provide a working voltage to the touch screen assembly.
The mobile terminal further comprises an antenna, and the antenna and the touch screen assembly are respectively located on two sides of the printed circuit board.
The beneficial effect of this application is: different from the prior art, the touch screen assembly that this application provided, including electrically conductive ground plate, the flexible circuit board, electrically conductive wall, touch-control chip and shielding cover, wherein, the flexible circuit board sets up on electrically conductive ground plate, including chip installation department and the first extension that links to each other, electrically conductive wall sets up on electrically conductive ground plate, and encircle the chip installation department, and be equipped with first opening in the handing-over department with first extension, so that first extension passes electrically conductive wall, touch-control chip installs on the chip installation department, the shielding cover is fixed in on the electrically conductive wall, and cover touch-control chip, thereby shielding cover, electrically conductive wall and electrically conductive ground plate can constitute touch-control chip's shielding structure jointly, in order to reduce the interference of the electromagnetic wave radiation that touch-control chip produced to antenna signal reception work, and then improve antenna receiving sensitivity.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic top view of a touch screen assembly provided in an embodiment of the present application;
FIG. 2 is a schematic front view of a touch screen assembly provided in an embodiment of the present application;
FIG. 3 is a schematic view of the touch screen assembly of FIG. 1 with the shield cover removed;
FIG. 4 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
FIG. 5 is a schematic structural diagram of a flexible circuit board provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
It should be noted that directional terms mentioned in the present application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ] and [ side wall ], refer to the directions of the attached drawings only. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals. In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
At present, a touch screen in a mobile terminal is generally connected with a printed circuit board through a flexible circuit board integrated with a touch chip, wherein the touch chip is welded on the flexible circuit board, but the touch chip mounted on the flexible circuit board is directly exposed outside and radiates electromagnetic waves outwards during operation, so that interference can be caused to a receiving antenna working around the touch chip, and then the receiving sensitivity of the antenna is reduced. In order to solve the technical problem, the technical scheme adopted by the application is to provide the touch screen assembly so as to reduce interference of electromagnetic wave radiation generated by the touch chip on antenna signal receiving work and further improve antenna receiving sensitivity.
Referring to fig. 1 to 4, fig. 1 is a schematic top view structure diagram of a touch screen assembly provided in an embodiment of the present application, fig. 2 is a schematic front view structure diagram of the touch screen assembly provided in the embodiment of the present application, fig. 3 is a schematic structure diagram of the touch screen assembly in fig. 1 with a shielding cover removed, and fig. 4 is a schematic cross-sectional structure diagram taken along a line a-a' in fig. 1. As shown in fig. 1 to 4, the touch screen assembly 10 includes a conductive ground plate 11, a flexible circuit board 12, a conductive wall 13, a touch chip 14 and a shielding cover 15, wherein the flexible circuit board 12 is disposed on the conductive ground plate 11, the flexible circuit board 12 includes a chip mounting portion 121 and a first extension portion 122 connected to the chip mounting portion 121, the conductive wall 13 is disposed on the conductive ground plate 11, the conductive wall 13 surrounds the chip mounting portion 121, and a first opening 131 is disposed at a junction with the first extension portion 122 so that the first extension portion 122 penetrates through the conductive wall 13, the touch chip 14 is mounted on the chip mounting portion 121, the shielding cover 15 is fixed on the conductive wall 13, and the shielding cover 15 covers the touch chip 14.
In the embodiment, the touch chip 14 of the touch screen assembly 10 is located in the cavity formed by the shielding cover 15, the conductive wall 13 and the conductive ground plate 11, so that interference of electromagnetic wave radiation generated during operation of the touch chip 14 on receiving operation of an antenna signal due to direct exposure of the touch chip 14 can be avoided, and in addition, the shielding cover 15 is grounded through the conductive wall 13 and the conductive ground plate 11, so that a return path of the electromagnetic wave signal generated by the touch chip 14 can be shortened, and radiation can be further reduced.
Specifically, the conductive ground plate 11 may be made of a metal conductive material, such as stainless steel, iron, copper, aluminum alloy, magnesium aluminum alloy, or zinc alloy. The material of the conductive wall 13 may also be a metal conductive material, and the material of the conductive wall 13 may also be the same as the material of the conductive ground plate 11, and in specific implementation, the conductive wall 13 and the conductive ground plate 11 may be an integrated structure, so as to save the process of welding or adhering the conductive wall 13 to the conductive ground plate 11. The material of the shielding cover 15 may be a metal material such as copper, iron, aluminum, zinc, etc., and the thickness of the shielding cover 15 should be sufficiently thick to ensure the electromagnetic shielding effect of the shielding cover 15, for example, the thickness of the shielding cover 15 may be 0.15mm to 0.2 mm.
In this embodiment, the shielding cover 15 may be covered on the top of the conductive wall 13, wherein an inner diameter of the shielding cover 15 may be slightly larger than a diameter of a cylindrical space surrounded by the conductive wall 13 on the conductive ground plate 11, so that an inner wall surface 151 of the shielding cover 15 can be in close contact with the outer side surface 132 of the conductive wall 13, and in order to achieve quick installation of the shielding cover 15, a positioning groove (not shown) may be further disposed on the outer side surface 132 of the conductive wall 13, and a positioning block (not shown) may be disposed on the inner side wall 151 of the shielding cover 15, so that during the assembly process of the touch screen assembly 10, the positioning block on the shielding cover 15 may be accommodated in the positioning groove on the conductive wall 13, so as to achieve quick fixed installation of the shielding cover 15 on the conductive wall 13.
In addition, in some alternative embodiments, the outer diameter of the shielding cover 15 may be slightly smaller than the caliber of the cylindrical space surrounded by the conductive wall 13 on the conductive ground plate 11, so that the outer side 152 of the shielding cover 15 can be in close contact with the inner side surface 133 of the conductive wall, and correspondingly, a positioning block may be disposed on the inner side surface 133 of the conductive wall 13, and a positioning slot may be disposed on the outer side 152 of the shielding cover 15, and the positioning block on the conductive wall 13 may be received in the positioning slot on the shielding cover 15, so as to achieve fast fixing and mounting of the shielding cover 15 on the conductive wall 13. In other alternative embodiments, the shielding cover 15 may be directly stacked on top of the conductive wall 13, and the shielding cover 15 may be adhesively fixed on the conductive wall 13 by a conductive adhesive between the shielding cover 15 and the conductive wall 13, or may be fastened on the conductive wall 13 by a fastening structure between the shielding cover 15 and the conductive wall 13.
It is understood that, when the shielding cover 15 is fixed on the conductive wall 13 through the positioning block and the positioning groove on the shielding cover 15 and the conductive wall 13, the positioning block is not limited to be only arranged on the shielding cover 15 or the conductive wall 13, and the positioning groove can be arranged on both the shielding cover 15 and the conductive wall 13 according to actual needs, and correspondingly, the positioning groove is not limited to be arranged on only the shielding cover 15 or the conductive wall 13, and can be arranged on both the shielding cover 15 and the conductive wall 13 according to actual needs. In addition, one positioning groove may accommodate one or more positioning blocks, for example, when the positioning groove is disposed on the outer surface 132 of the conductive wall 13, the positioning groove may extend circumferentially on the outer surface 132 of the conductive wall 13, correspondingly, the number of positioning blocks disposed on the inner sidewall 151 of the shielding cover 15 may be plural, and the positioning holes may also extend circumferentially on the inner sidewall 151 of the shielding cover 15.
Therefore, the shielding cover is fixed on the conductive wall integrally formed with the conductive grounding plate by adopting the structural design, the occurrence of the bad phenomenon of a device caused by directly welding and fixing the shielding cover on the conductive grounding plate can be avoided, the touch screen assembly is easier to realize in the assembling process, and the universality is stronger.
In one embodiment, in order to improve the sealing performance of the chamber formed by the shielding cover 15, the conductive wall 13 and the conductive ground plate 11, and to more effectively shield the electromagnetic waves generated by the touch chip 14 located therein, the shape and size of the shielding cover 15 may be matched with the shape and size of the conductive wall 13, so that the shielding cover 15 can be seamlessly covered on the top of the conductive wall 13. For example, when the cross-sectional shape of the conductive wall 13 is square, the cross-sectional shape of the shielding cover 15 may be square, and the size of the cross-sectional shape of the shielding cover 15 may be slightly larger or smaller than the size of the cross-sectional shape of the conductive wall 13, so that the shielding cover 15 can be closely and seamlessly placed on the top of the conductive wall 13.
In the present embodiment, the touch chip 14 may be mounted on the chip mounting portion 121 of the flexible circuit board 12 through a soldering process, and the touch chip 14 is connected to the wires in the chip mounting portion 121 and grounded through the conductive ground plate 11 located below the flexible circuit board 12. Specifically, the touch screen assembly 10 further includes a touch screen (not shown in the figure), which is electrically connected to the circuit in the first extension portion 121 of the flexible circuit board 12, so as to electrically connect the touch screen and the touch chip 14, so that the touch chip 14 can provide a driving signal to the touch screen when the touch screen is in operation.
In some embodiments, as shown in fig. 5, the flexible circuit board 12 may further include a second extending portion 123 connected to the chip mounting portion 121, and the conductive wall 13 is provided with a second opening (not shown) at an intersection with the second extending portion 123, so that the second extending portion 123 penetrates through the conductive wall 13. The second extending portion 123 is electrically connected to an external printed circuit board, which is used to provide a working voltage to the touch screen assembly 10, specifically, the printed circuit board provides the working voltage to the touch chip 14, so that the touch chip 14 can provide a driving signal to the touch screen.
In order to further improve the sealing performance of the chamber formed by the shielding cover 15, the conductive wall 13 and the conductive ground plate 11, so as to more effectively shield the electromagnetic waves generated by the touch chip 14 located therein, the size of the first opening 131 and the size of the second opening located on the conductive wall 13 should not be too large, the shape and size of the first opening 131 may be configured to match the shape and size of the cross section of the first extending portion 122 at the first opening 131, and the shape and size of the second opening may be configured to match the shape and size of the cross section of the second extending portion 123 at the second opening, so that the first extending portion 122 of the flexible circuit board 12 can pass through the first opening 131 on the conductive wall 13 without a gap, and the second extending portion 123 can pass through the second opening on the conductive wall 13 without a gap, such that the shielding cover 15, The chamber formed by the conductive wall 13 and the conductive ground plate 11 will be a completely sealed chamber, enabling an optimal shielding effect.
Specifically, the height of the conductive wall 13 is not less than the thickness of the flexible circuit board 12, so that the shielding cover does not need to be opened, and therefore, a conventional shielding cover can be adopted in the assembly process of the touch screen assembly, which is beneficial to saving of process cost. In addition, the extending directions of the first extending portion 122 and the second extending portion 123 of the flexible circuit board 12 may be any angle, for example, as shown in fig. 5, the flexible circuit board 12 in which the extending direction of the first extending portion 122 and the extending direction of the second extending portion 123 are perpendicular to each other may be selected.
Different from the prior art, the touch screen assembly in this embodiment includes a conductive ground plate, a flexible circuit board, a conductive wall, a touch chip and a shielding cover, wherein the flexible circuit board is disposed on the conductive ground plate, and includes a chip mounting portion and a first extension portion connected to each other, the conductive wall is disposed on the conductive ground plate and surrounds the chip mounting portion, and a first opening is disposed at a junction with the first extension portion, so that the first extension portion penetrates through the conductive wall, the touch chip is mounted on the chip mounting portion, and the shielding cover is fixed on the conductive wall and covers the touch chip, so that the shielding cover, the conductive wall and the conductive ground plate can jointly form a shielding structure of the touch chip, thereby reducing interference of electromagnetic wave radiation generated by the touch chip on antenna signal receiving work, and further improving antenna receiving sensitivity.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application. As shown in fig. 6, the mobile terminal 60 includes a housing 61, a printed circuit board (not shown) and the touch screen assembly 62 in any of the above embodiments, wherein the printed circuit board is located between the touch screen assembly 62 and the housing 61, and the touch screen assembly 62 is electrically connected to the printed circuit board, and the printed circuit board is used for providing an operating voltage to the touch screen assembly 62.
The touch screen assembly 62 includes a conductive ground plate, a flexible circuit board, a conductive wall, a touch chip and a shielding cover, wherein the flexible circuit board is disposed on the conductive ground plate, the flexible circuit board includes a chip mounting portion and a first extension portion connected to each other, the conductive wall is disposed on the conductive ground plate, the conductive wall surrounds the chip mounting portion, and a first opening is disposed at a junction of the conductive wall and the first extension portion, so that the first extension portion penetrates through the conductive wall, the touch chip is mounted on the chip mounting portion, the shielding cover is fixed on the conductive wall, and the shielding cover covers the touch chip. In this way, the touch chip of the touch screen assembly 62 is located in the cavity formed by the shielding cover, the conductive wall and the conductive ground plate, so that interference of electromagnetic wave radiation generated during operation of the touch chip on antenna signal receiving operation due to direct exposure of the touch chip can be avoided.
Specifically, as shown in fig. 6, the touch screen assembly 62 may further include a touch screen 621, where the touch screen 621 is electrically connected to the circuit in the first extending portion of the flexible circuit board, so as to implement electrical connection between the touch screen 621 and the touch chip, so that the touch chip can provide a driving signal to the touch screen 621 when the touch screen 621 operates.
In one embodiment, the flexible circuit board of the touch screen assembly 62 may further include a second extension portion connected to the chip mounting portion, and the conductive wall is provided with a second opening at an intersection with the second extension portion, so that the second extension portion passes through the conductive wall. The second extension portion is electrically connected to a printed circuit board in the mobile terminal 60, and the printed circuit board is used for providing a working voltage to the touch screen assembly 62, specifically, the printed circuit board provides a working voltage to a touch chip of the touch screen assembly 62, so that the touch chip can provide a driving signal to the touch screen 621.
The touch screen 621 and the touch chip of the touch screen assembly 62 may be respectively located on two opposite surfaces of the printed circuit board, for example, the touch screen 621 is located on an upper surface of the printed circuit board, and the touch chip is located on a lower surface of the printed circuit board, so as to avoid a problem of a decrease in a screen occupation ratio of the mobile terminal due to the touch chip occupying an effective display area of the mobile terminal.
In addition, the mobile terminal 60 may further include an antenna, and the antenna and the touch chip of the touch screen assembly may be respectively located at two sides of the printed circuit board, for example, the antenna may be disposed on an upper surface of the printed circuit board, and the touch chip may be located on a lower surface of the printed circuit board, so that the antenna and the touch chip are respectively located on two opposite surfaces of the printed circuit board, which is beneficial to further reducing interference of electromagnetic wave radiation generated by the touch chip on antenna signal receiving work, and further improving antenna receiving sensitivity. Further, the housing 61 of the mobile terminal 60 may be located between the printed circuit board and the touch chip to further reduce interference of electromagnetic wave radiation generated by the touch chip to the antenna signal receiving operation.
Specifically, the housing 61 of the mobile terminal 60 may be a front housing 61, and the mobile terminal 60 may further include a rear housing (not shown in the figure) matching the size and shape of the front housing 61, wherein a printed circuit board may be mounted between the front housing 61 and the rear housing. In specific implementation, the printed circuit board and the front housing 61 or the rear housing may be fixed in any manner, specifically, may be fixed by a nut or a bolt, and may also be fixed by a snap. The front shell may be made of an insulating material such as plastic, the rear shell may be made of a metal material such as aluminum alloy and stainless steel, the rear shell made of a metal material has a good appearance, and in other embodiments, the rear shell may be made of plastic, ceramic, glass or the like.
Further, the mobile terminal 60 may further include a display screen (not shown), the display screen is disposed on the front housing 61, and the front housing 61 may provide support for the display screen. Specifically, the Display screen may adopt an LCD (Liquid Crystal Display) screen for displaying information, and the LCD screen may be a TFT (Thin Film Transistor) screen, an IPS (In-plane switching) screen, or an SLCD (split Liquid Crystal Display) screen. In other embodiments, the display screen may further adopt an OLED (Organic Light-Emitting display) screen for displaying information, and the OLED screen may be an AMOLED (Active Matrix Organic Light-Emitting Diode) screen or a Super AMOLED (Super Active Matrix Organic Light-Emitting Diode) screen or a Super AMOLED Plus (Super Active Matrix Organic Light-Emitting Diode) screen. It should be noted that, in some embodiments, the display screen and the touch screen may have the same structure, that is, the touch screen of the mobile terminal may be a touch display screen, and the touch display screen is both a display screen and a touch screen.
In the above embodiments, the mobile terminal 60 includes, but is not limited to, a smart phone, a tablet computer, and the like.
Different from the prior art, the mobile terminal in this embodiment includes a housing, a printed circuit board and a touch screen assembly, the touch screen assembly and the printed circuit board are mounted on the housing, the touch screen assembly is electrically connected to the printed circuit board, the printed circuit board is used for providing a working voltage to the touch screen assembly, the touch screen assembly includes a conductive ground plate, a flexible circuit board, a conductive wall, a touch chip and a shielding cover, wherein the flexible circuit board is disposed on the conductive ground plate and includes a chip mounting portion and a first extension portion connected to each other, the conductive wall is disposed on the conductive ground plate and surrounds the chip mounting portion, and a first opening is disposed at a junction with the first extension portion to allow the first extension portion to pass through the conductive wall, the touch chip is mounted on the chip mounting portion, the shielding cover is fixed on the conductive wall and covers the touch chip, so that the shielding cover, the conductive wall and the conductive ground plate can jointly form a shielding structure of the touch chip, the interference of electromagnetic wave radiation generated by the touch chip on the antenna signal receiving work is reduced, and the antenna receiving sensitivity is further improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A touch screen assembly, comprising:
a conductive ground plate;
a flexible circuit board disposed on the conductive ground plate, the flexible circuit board including a chip mounting portion and a first extension portion connected to each other;
the conductive wall is arranged on the conductive grounding plate, the conductive wall and the conductive grounding plate are of an integrally formed structure, the conductive wall surrounds the chip mounting part, and a first opening is arranged at the joint of the conductive wall and the first extension part, so that the first extension part penetrates through the conductive wall;
a touch chip mounted on the chip mounting portion;
the shielding cover is fixed on the conductive wall and covers the touch chip; and the number of the first and second groups,
the buckle structure is positioned between the shielding cover and the conductive wall, and the shielding cover is fixed on the conductive wall through the buckle structure.
2. The touch screen assembly of claim 1, wherein the shield cover is disposed on top of the conductive wall.
3. The touch screen assembly of claim 2, wherein the conductive wall has a positioning groove on an outer surface thereof, and the shield cover has a positioning block on an inner sidewall thereof, the positioning block being received in the positioning groove to fix the shield cover to the conductive wall.
4. The touch screen assembly of claim 2, wherein the shape and size of the shield cover matches the shape and size of the conductive wall.
5. The touch screen assembly of claim 1, wherein the flexible circuit board further comprises a second extension connected to the chip mounting portion, and wherein the conductive wall has a second opening at an interface with the second extension such that the second extension passes through the conductive wall.
6. The touch screen assembly of claim 5, further comprising a touch screen electrically connected to the first extension, wherein the second extension is electrically connected to an external printed circuit board for providing operating voltage to the touch screen assembly.
7. The touch screen assembly of claim 1, wherein the shield cover has a thickness in a range of 0.15mm to 0.2 mm.
8. The touch screen assembly of claim 1, wherein the height of the conductive wall is no less than the thickness of the flexible circuit board.
9. A mobile terminal comprising a housing, a printed circuit board and the touch screen assembly of any of claims 1-8, the printed circuit board being positioned between the touch screen assembly and the housing, the touch screen assembly being electrically connected to the printed circuit board, the printed circuit board being configured to provide an operating voltage to the touch screen assembly.
10. The mobile terminal of claim 9, further comprising an antenna, wherein the antenna and the touch screen assembly are located on two sides of the printed circuit board, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911407571.6A CN111107204B (en) | 2019-12-27 | 2019-12-27 | Touch screen assembly and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911407571.6A CN111107204B (en) | 2019-12-27 | 2019-12-27 | Touch screen assembly and mobile terminal |
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| Publication Number | Publication Date |
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| CN111107204A CN111107204A (en) | 2020-05-05 |
| CN111107204B true CN111107204B (en) | 2021-11-16 |
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| CN201911407571.6A Active CN111107204B (en) | 2019-12-27 | 2019-12-27 | Touch screen assembly and mobile terminal |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2390957B (en) * | 2002-07-15 | 2005-11-23 | * Motorola, Inc | System for enhanced radiation performance of a communication device |
| CN2733831Y (en) * | 2004-09-22 | 2005-10-12 | 倚天资讯股份有限公司 | Shielding device |
| JP2009130181A (en) * | 2007-11-26 | 2009-06-11 | Ｎｅｃディスプレイソリューションズ株式会社 | Electronic circuit board, and method and structure for shielding electronic circuit board |
| CN205622671U (en) * | 2016-03-18 | 2016-10-05 | 上海与德通讯技术有限公司 | Mobile terminal |
| CN107454215B (en) * | 2017-07-28 | 2020-12-04 | 捷开通讯(深圳)有限公司 | Mobile terminal for preventing deterioration of coupling sensitivity |
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Effective date of registration: 20230320 Address after: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Patentee after: Shenzhen Huaxi Investment Co.,Ltd. Address before: 516006 Zhongkai hi tech Zone, Huizhou, Guangdong, 86 Chang seven Road West Patentee before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |