CN105823489B - The method for platemaking and device of electronic compass - Google Patents
The method for platemaking and device of electronic compass Download PDFInfo
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- CN105823489B CN105823489B CN201610067428.7A CN201610067428A CN105823489B CN 105823489 B CN105823489 B CN 105823489B CN 201610067428 A CN201610067428 A CN 201610067428A CN 105823489 B CN105823489 B CN 105823489B
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- terminal
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- electronic compass
- mainboard
- isolated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
Abstract
The embodiment of the invention provides a kind of method for platemaking of electronic compass, for making a plate to the circuit board terminal for including electronic compass, the terminal further includes terminal mainboard, terminal center, terminal rear shell and connector, the connector is used to connect the ground connection grade of the terminal center or the terminal rear shell and the terminal mainboard, the described method includes: according to electronic compass, position of the connector in circuit board terminal, determine that the terminal center connect the first loop current to form the first circuit with the ground connection grade of the terminal mainboard, and/or, determine that the terminal rear shell connect the second servo loop electric current of formed second servo loop with the ground connection grade of the terminal mainboard；According to first loop current and/or second servo loop electric current, determine that the connector needs segregate position；In said determined position, the connector is isolated.The present invention reduces interference of the electromagnetic field to electronic compass.
Description
Technical field
The present invention relates to electronic technology fields, more particularly to the method for platemaking and device of a kind of electronic compass.
Background technique
Electronic compass is also digital compass, is a kind of method using the arctic earth's magnetic field Lai Ding.Typically now useful magnetic
The electronic compass that resistance sensor and fluxgate are process.Although GPS navigation, position, test the speed, have in terms of orientation it is extensive
Using, but since its signal is often blocked by landform, atural object, cause precision to substantially reduce, or even cannot use, especially in high building woods
The forest zone in vertical city and dense vegetation, the validity of GPS signal is only 60%, and in the stationary case, GPS can not also give
Course information out.Electronic compass product is exactly to meet such demand of user and design.It can have GPS signal
Effect compensation guarantees that navigation orientation information 100% effectively, even can also work normally after GPS signal losing lock, accomplishes " to lose star
Do not lose to ".
Electronic compass is a components nowadays indispensable in the intelligent terminals such as smart phone, smartwatch,
Most important effect is exactly to provide data basis for compass applications.And with the promotion that people finely pursue exquisiteness, it is more next
More all-metal middle frame supports, all-metal battery cover intelligent terminal comply with and give birth to, and in order to guarantee antenna performance, generally require
With connecing mainboard by screw or elastic slice by metal middle frame support and metal battery cover, it will form in high currents such as chargings
Ground reflux；Electronic compass is the device for detecting earth's magnetic field, magnetic field strength only 50uT or so, very sensitive for the induction in magnetic field,
Including Hard Magnetic, soft magnetism and electric current (electric field of variation generates changing magnetic field), Hard Magnetic, soft magnetism have algorithm that can calibrate at present
(because magnetic field is relatively stable), and the electric current changed is also unstable, institute due to being unable to judge accurately size, the magnetic field of generation
Become a great problem to solve the interference of electromagnetic field of electric current generation, at present as far as possible far from high current cabling only in layout,
And for the interference of electromagnetic field of ground reflux generation, there are no the solutions of good method in the industry at present.
Summary of the invention
The embodiment of the present invention, can be by packet the technical problem to be solved is that a kind of method for platemaking of electronic compass is provided
The circuit board for including electronic compass is made a plate, to reduce influence of the interference of electromagnetic field to electronic compass.
The method for platemaking of the electronic compass, for making a plate to the circuit board terminal for including electronic compass, the end
End further includes terminal mainboard, terminal center, terminal rear shell and connector, the connector for connect the terminal center or
The ground connection of the terminal rear shell and terminal mainboard grade, which comprises existed according to the electronic compass, the connector
Position in the circuit board terminal determines that the terminal center connect to form first with the ground connection of terminal mainboard grade
First loop current in circuit, and/or, determine that the ground connection grade of the terminal rear shell and the terminal mainboard connect to form the
The second servo loop electric current of secondary circuit；According to first loop current and/or second servo loop electric current, determine the connector need by
The position of isolation；In said determined position, the connector is isolated.
Correspondingly, the embodiment of the invention also provides a kind of devices, to guarantee the implementation and application of the above method.
Described device, for making a plate to the circuit board terminal for including electronic compass, the terminal further includes terminal master
Plate, terminal center, terminal rear shell and connector, the connector for connect the terminal center or the terminal rear shell with
The ground connection grade of the terminal mainboard, described device includes: loop current determination unit, for according to the electronic compass, described
Position of the connector in the circuit board terminal determines that the terminal center connect institute with the ground connection of terminal mainboard grade
First loop current in the first circuit is formed, and/or, determine that the terminal rear shell is connect with the ground connection of terminal mainboard grade
The second servo loop electric current of formed second servo loop；Isolated location determination unit, for according to first loop current and/or the
Secondary circuit electric current determines that the connector needs segregate position；Isolated location is used in said determined position, by institute
Connector is stated to be isolated.
Compared with prior art, the embodiment of the present invention includes following advantages:
The present invention is according to the layout between electronic compass and connector, to judge and determine that connector need to be segregate
Position, and be isolated eventually by by connector, come the interference for blocking or reducing circuit to electronic compass.Particularly, gold can be solved
Belong to middle frame support and metal battery cover by screw or elastic slice with connecing mainboard, the ground go back to formed in high currents such as chargings
Flow the interference of electromagnetic field problem generated to electronic compass.It includes electronics that the present invention can be promoted in the case where not increasing any cost
The performance of the end product of compass promotes the expressive force of terminal.
Detailed description of the invention
Fig. 1 is a kind of step flow chart of the method for platemaking of electronic compass of first embodiment of the invention；
Fig. 2 a, 2b be a kind of electronic compass of second embodiment of the invention method for platemaking in be not fully insulated connector
Schematic diagram；
Fig. 3 is the signal of completely isolated connector in a kind of method for platemaking of electronic compass of third embodiment of the invention
Figure；
Fig. 4 is a kind of structural block diagram of the method for platemaking embodiment of electronic compass of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Skilled in the art realises that terminal center passes through the ground connection of connector (screw or elastic slice) and terminal mainboard grade
Connection will form circuit, and electromagnetic field caused by circuit can interfere electronic compass；Similarly, terminal rear shell (or electricity
It Chi Gai) is connected also by the ground connection of connector and terminal mainboard grade, also will form circuit, equally electronic compass is interfered.
Therefore.In order to solve influence of the interference of electromagnetic field to electronic compass, the present invention provides a kind of method for platemaking of electronic compass, passes through
The position of electronic compass is judged and calculated, so that it is determined that connector needs segregate position out, and eventually by will connect
Fitting isolation, come the interference for blocking or reducing circuit to electronic compass.
Referring to Fig.1, a kind of step flow chart of the method for platemaking of electronic compass of first embodiment of the invention is shown, is changed
Method is used to make a plate to the circuit board terminal for including electronic compass, after terminal further includes terminal mainboard, terminal center, terminal
Shell and connector, connector are used to connect the ground connection grade of terminal center or terminal rear shell and terminal mainboard.Wherein, terminal mainboard
Also known as motherboard, system board, logic card, motherboard, bottom plate etc., be constitute Complex Electronic Systems Based such as smart phone center or
Main circuit board.Terminal center is the main framework of terminal, is taken the mobile phone as an example, and mobile phone center supports whole mobile phone, is similar to human body
Bone；The center of mobile phone is by repeatedly processing, such as polishing, CNC (numerically-controlled machine tool) processing, drilling etc., so as to group
Fill some hardware such as CPU, card slot.Terminal rear shell can refer to battery lid, or it is whole for having some terminals, such as
Iphone mobile phone is complete machine, and back shell is exactly terminal rear shell.Connector is for connecting terminal center or terminal rear shell and end
Hold the device of the ground connection grade of mainboard, such as screw or elastic slice etc..
This method can specifically include following steps:
S101: according to the position of electronic compass, connector in circuit board terminal, terminal center and terminal mainboard are determined
The connection of ground connection grade form first loop current in the first circuit, and/or, determine the ground connection of terminal rear shell and terminal mainboard
Grade connects the second servo loop electric current of formed second servo loop.
It is appreciated that above-mentioned the first circuit or second servo loop is closer from electronic compass, the electromagnetism caused by electronic compass
Field interference is bigger.Therefore, in order to reduce interference of the circuit to electronic compass, the electric current of circuit generation can be precomputed, is led to
Overcurrent is counter to release the position that connector is isolated.
The specific method for determining loop current is determined depending on being formed by circuit.Due to the component of different types of terminal
Type, layout are different, therefore are formed by circuit difference.In specific implementation, theory deduction can be taken mutually to tie with actual measurement
The mode of conjunction determines loop current.
S102: according to the first loop current and/or second servo loop electric current, determine that connector needs segregate position.
It is appreciated that the size phase of the segregate position of connector (or being interpreted as wherefrom being isolated) with loop current
It closes.In general, loop current is bigger, and the segregate position of connector is remoter, that is, from connector itself measure, need to away from
It is isolated from itself farther position.For example, it is b that the first loop current, which is a, second servo loop electric current, and a is greater than b, and by meter
After calculation, need by the connector in the first circuit from be isolated apart from connector L1 distance (i.e. by connector be isolated in from
As within the scope of the L1 at center), need by the connector in second servo loop from be isolated apart from connector L2 distance (i.e. will
Connector is isolated within the scope of the L2 centered on itself), it is possible to understand, since the first loop current a is greater than second servo loop
Electric current b, therefore, the segregate position of connector is distal to the segregate position of connector in second servo loop in the first circuit, that is,
L1 is greater than L2.
S103: on determining position, connector is isolated.
As it can be seen that the present invention is according to the layout between electronic compass and connector, thus judgement and determine connector need by
The position of isolation, and be isolated eventually by by connector, come the interference for blocking or reducing circuit to electronic compass.Particularly, may be used
Metal middle frame support and metal battery cover are solved by screw or elastic slice with connecing mainboard, is formed when the high currents such as charging
Ground flow back interference of electromagnetic field problem that electronic compass is generated.The present invention can promote packet in the case where not increasing any cost
The performance of end product containing electronic compass promotes the expressive force of terminal.
Different modes connector to be isolated below, are described further the present invention.
Before the specific implementation details for specifically introducing connector isolation, some general of PCB (printed circuit board) is first understood
It reads.PCB plate-making includes multilayer:
1, mechanical layer (Mechanical Layers)
Mechanical layer is generally used to draw the frame (boundary) of printed circuit board, usually need to only use a mechanical layer.Generally
For outer dimension, data markers, alignment mark, Assembly Instruction Device and the other mechanical informations of circuit board to be arranged.
2, forbid wiring layer (Keep out layer)
For defining the region for capableing of effective placing element and wiring on circuit boards.A closed area is drawn in the layer
As wiring effective district, autoplacement and wiring are unable to outside the region.
3, silk-screen layer (Silkscreen layer)
Silk-screen layer is mainly used for placing printed information, such as the profile and mark of element, various annotation characters etc..
4, signals layer (Signal layer)
Signals layer is mainly used for the conducting wire arranged on circuit board.Signals layer can have it is multiple, for example including Top layer (top
Layer), Bottom layer (bottom) and several MidLayer (middle layer).Wherein, TOP LAYER (layer top layer wiring layer): design
It is also referred to as element layer for top layer copper foil cabling, is mainly used to place component；For that can be used to be routed than laminate and multi-layer board.Such as
It is single sided board then without the layer.BOMTTOM LAYER (bottom wiring layer): being designed as bottom copper foil cabling, also referred to as welding layer, main
It is used to be routed and weld, component can also be placed sometimes.
5, multilayer (Multi layer)
Pad and penetration via hole will penetrate whole circuit board on circuit board, electrically connect from different conductive pattern layer foundation
Relationship is connect, therefore is specially provided with abstract layer: multilayer.Under normal circumstances, pad and via hole will be arranged in multilayer,
If closing this layer, pad can not just be shown with via hole.
Specifically, there are many modes that connector is isolated in the present invention, for example, it may be not fully insulated, it can also
To be entirely isolated.No matter which kind of mode, require to be isolated in each layer of pcb board.
A, 2b referring to fig. 2 are the company of being not fully insulated in a kind of method for platemaking of electronic compass of second embodiment of the invention
The schematic diagram of fitting.
It is on determining position, by the copper of the ground connection grade of the copper sheet of connector and terminal mainboard for being not fully insulated
Skin is split, so that connector be isolated.At this point, also needing to execute following step: determining the projected area of electronic compass；In distance electricity
The metallic support of terminal center is carried out at the projected area first distance of sub- compass to empty processing.
Specifically understood incorporated by reference to Fig. 2 a, 2b.
Metallic support in the A of electronic compass projected area is emptied, to cut off the circuit of middle frame support, is made by a referring to fig. 2
Electronic compass projected area and circumference a millimeters of (a, that is, above-mentioned first distance) inner central frames do not have electric current (wherein, such as preceding analysis, a
Related to loop current size, electric current is bigger, and a requirement is bigger, that is, requires the position of cutting reflux also remoter).Meanwhile referring to figure
2b, will electronic compass with nearby will lead to mainboard screw hole location and elastic slice position copper sheet and mainboard that reflux influences copper sheet every
From same guarantee electronic compass b millimeters of inner central frames of circumference do not have electric current, and (wherein b is related to size of current, the bigger b requirement of electric current
It is bigger, that is, require the position of cutting reflux also remoter), wherein need each layer all to carry out copper sheet segmentation, that is, so that in metal
Frame reflux is flowed back with mainboard far from electronic compass.
As it can be seen that this be not fully insulated in the mode of connector, by cutting off middle frame support, while will be near electronic compass
Will lead to the copper sheet of connector that reflux influences, with mainboard copper sheet be isolated, is flowed back so that metal center flows back with mainboard
Far from electronic compass.
It is completely isolated connector in a kind of method for platemaking of electronic compass of third embodiment of the invention referring to Fig. 3
Schematic diagram.
For completely isolated, be forbidding (keepout layers) reservation connectors of wiring layer on determining position, thus
Connector is isolated.At this point, also need execute following step: by a logical high frequency capacitance by the ground connection of connector and terminal mainboard grade
It is attached, achievees the purpose that logical high frequency.
Specifically understood incorporated by reference to Fig. 3.
By electronic compass nearby will lead to reflux influence connect mainboard Floor screw or elastic slice position copper sheet keepout is independent
Keep apart, then screw or elastic slice are connected on the ground by mainboard by a capacitor, plays stopping direct current (reflux of cutting ground), logical high frequency
The effect of (guarantee antenna performance), not only ensure that antenna performance, but also has cut off and formed between mainboard and center or battery cover
Reflux, to guarantee electronic compass not by the interference of electromagnetic field.
As it can be seen that in the mode of this completely isolated connector, by the way that electronic compass nearby will lead to connecing for reflux influence
The connector copper sheet keepout on mainboard ground individually keeps apart, then connector is connected to mainboard on the ground by a capacitor, thus
Guarantee electronic compass not by the interference of electromagnetic field.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according to
According to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implemented
Necessary to example.
Referring to Fig. 4, a kind of structural block diagram of Installation practice of the present invention is shown, which is used for including electronic compass
Circuit board terminal make a plate, wherein terminal further includes terminal mainboard, terminal center, terminal rear shell and connector, described
Connector is used to connect the ground connection grade of the terminal center or the terminal rear shell and the terminal mainboard, and described device includes:
Loop current determination unit 401 determines the end for the position according to electronic compass in circuit board terminal
End center connect the first loop current to form the first circuit with the ground connection grade of the terminal mainboard, and/or, it determines described
Terminal rear shell connect the second servo loop electric current of formed second servo loop with the ground connection grade of the terminal mainboard；
Isolated location determination unit 402, for determining institute according to first loop current and/or second servo loop electric current
Stating connector needs segregate position；
Isolated location 403, in said determined position, the connector to be isolated.
Preferably,
Isolated location 403 is specifically used for: in said determined position, by the copper sheet of the connector and the terminal master
The copper sheet of the ground connection grade of plate is split, so that the connector be isolated.
Preferably, the device further include:
Center processing unit 404, for determining the projected area of the electronic compass, and in the throwing apart from the electronic compass
It carries out the metallic support of the terminal center to empty processing at the first distance of shadow zone.
Preferably,
The isolated location 403 is specifically used for, and in said determined position, wiring layer is being forbidden to retain the connection
Part, so that the connector be isolated.
Preferably, the device further include:
Logical high frequency unit 405, for passing through a logical high frequency capacitance for the ground connection of the connector and the terminal mainboard
Grade is attached.
As it can be seen that the present invention is according to the layout between electronic compass and connector, thus judgement and determine connector need by
The position of isolation, and be isolated eventually by by connector, come the interference for blocking or reducing circuit to electronic compass.Particularly, may be used
Metal middle frame support and metal battery cover are solved by screw or elastic slice with connecing mainboard, is formed when the high currents such as charging
Ground flow back interference of electromagnetic field problem that electronic compass is generated.The present invention can promote packet in the case where not increasing any cost
The performance of end product containing electronic compass promotes the expressive force of terminal.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, limited by sentence " including one ... "
Element, it is not excluded that including identical being wanted in the process, method of the element, article or terminal device there is also other
Element.
It above to a kind of method for platemaking and device of electronic compass provided by the present invention, is described in detail, herein
In apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to sides
Assistant solves method and its core concept of the invention；At the same time, for those skilled in the art, think of according to the present invention
Think, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as pair
Limitation of the invention.
Claims (10)
1. a kind of method for platemaking of electronic compass is made a plate for the circuit board to the terminal for including electronic compass, feature
It is, the terminal further includes terminal mainboard, terminal center, terminal rear shell and connector, and the terminal center passes through described
Connector is connect with the earthing pole of the terminal mainboard, and the terminal rear shell is connect by the connector and the terminal mainboard
Earth polar connection, which comprises
According to the position of the electronic compass, the connector in the circuit board terminal, determine the terminal center with
The ground connection grade connection of the terminal mainboard forms first loop current in the first circuit, and/or, determine the terminal rear shell
The second servo loop electric current of formed second servo loop is connect with the ground connection grade of the terminal mainboard；
According to first loop current and/or second servo loop electric current, determine that the connector needs segregate position；
In said determined position, the connector is isolated.
2. the method according to claim 1, wherein it is described in said determined position, by the connector
It is isolated, comprising:
In said determined position, the copper sheet of the copper sheet of the connector and the ground connection grade of the terminal mainboard is divided
It cuts, so that the connector be isolated.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
Determine the projected area of the electronic compass；
It carries out the metallic support of the terminal center to empty processing at the projected area first distance apart from the electronic compass.
4. the method according to claim 1, wherein it is described in said determined position, by the connector
It is isolated, comprising:
In said determined position, wiring layer is being forbidden to retain the connector, so that the connector be isolated.
5. according to the method described in claim 4, it is characterized in that, the method also includes: passing through a logical high frequency capacitance will
The ground connection grade of the connector and the terminal mainboard is attached.
6. a kind of device is made a plate, which is characterized in that the terminal is also for the circuit board to the terminal for including electronic compass
Including terminal mainboard, terminal center, terminal rear shell and connector, the terminal center passes through the connector and the terminal
The earthing pole of mainboard connects, and the terminal rear shell is connect by the connector with the earthing pole of the terminal mainboard, the dress
It sets and includes:
Loop current determination unit, for the position according to the electronic compass, the connector in the circuit board terminal,
Determine that the terminal center connect the first loop current to form the first circuit with the ground connection grade of the terminal mainboard, and/
Or, determining that the terminal rear shell connect the second servo loop electric current of formed second servo loop with the ground connection grade of the terminal mainboard；
Isolated location determination unit, for determining the connector according to first loop current and/or second servo loop electric current
Need segregate position；
Isolated location, in said determined position, the connector to be isolated.
7. device according to claim 6, which is characterized in that the isolated location is specifically used for: in the position of the determination
It sets, the copper sheet of the connector and the copper sheet of the ground connection grade of the terminal mainboard is split, so that the connection be isolated
Part.
8. device according to claim 7, which is characterized in that further include:
Center processing unit, for determining the projected area of the electronic compass, and in the projected area apart from the electronic compass
It carries out the metallic support of the terminal center to empty processing at one distance.
9. device according to claim 6, which is characterized in that the isolated location is specifically used for, in the position of the determination
It sets, is forbidding wiring layer to retain the connector, so that the connector be isolated.
10. device according to claim 9, which is characterized in that further include: logical high frequency unit, for passing through a logical height
The ground connection grade of the connector and the terminal mainboard is attached by frequency capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610067428.7A CN105823489B (en) | 2016-01-29 | 2016-01-29 | The method for platemaking and device of electronic compass |
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| CN201610067428.7A CN105823489B (en) | 2016-01-29 | 2016-01-29 | The method for platemaking and device of electronic compass |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109691071A (en) * | 2016-12-23 | 2019-04-26 | 华为技术有限公司 | A kind of electronic equipment |
| CN109813295B (en) * | 2017-11-20 | 2021-08-03 | 北京小米移动软件有限公司 | Orientation determination method and device and electronic equipment |
| CN108234698B (en) * | 2017-12-28 | 2020-07-28 | 维沃移动通信有限公司 | Mobile terminal |
| CN108093106B (en) * | 2017-12-28 | 2020-05-22 | 维沃移动通信有限公司 | Mobile terminal |
| CN111060086B (en) * | 2019-12-25 | 2022-03-22 | 维沃移动通信有限公司 | Navigation device and electronic equipment |
| CN113311491A (en) * | 2020-02-26 | 2021-08-27 | 北京小米移动软件有限公司 | Terminal equipment |
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