CN104615345A - Method and device for automatically regulating position of virtual keyboard - Google Patents
Method and device for automatically regulating position of virtual keyboard Download PDFInfo
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- CN104615345A CN104615345A CN201310542872.6A CN201310542872A CN104615345A CN 104615345 A CN104615345 A CN 104615345A CN 201310542872 A CN201310542872 A CN 201310542872A CN 104615345 A CN104615345 A CN 104615345A
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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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04886—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
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Abstract
The invention discloses a method for automatically regulating the position of a virtual keyboard. The method comprises the following steps: obtaining a hand holding position, and regulating the position of the virtual keyboard according to the hand holding position. The invention also discloses a device for automatically regulating the position of the virtual keyboard. The device comprises an induction module and a regulation module, wherein the induction module senses a position where a hand holds a terminal, and converts the position into two-dimensional position coordinate information, and the regulation module regulates the position of the virtual keyboard to a range which can be controlled by one hand of the user according to the position coordinate information.
Description
Technical field
The present invention relates to keyboard adjustment technology, particularly relate to a kind of method and apparatus of automatic adjustment virtual keyboard position.
Background technology
The mobile terminal such as mobile phone and panel computer daily life and work in application more and more extensively, more and more deep.In order to better Consumer's Experience can be had, mobile terminal becomes more and more frivolous and is easy to carry, but the screen of mobile terminal but becomes increasing, and the position of the dummy keyboard of giant-screen mobile terminal is all fixing, make the input of user's one hand become more and more difficult, thus the input reducing user is experienced.
Summary of the invention
The present invention mainly provides a kind of method and apparatus of automatic adjustment virtual keyboard position, and the position of dummy keyboard can be made to change along with the change of staff grip position, facilitates user to carry out one hand input.
Technical scheme of the present invention is achieved in that
Embodiments provide a kind of method of automatic adjustment virtual keyboard position, the method comprises:
Obtain the position that staff grips;
According to the position of the position adjustment dummy keyboard that described staff grips.
In such scheme, the position that described acquisition staff grips is: gripped by staff and produce induction information, and produce the coordinate information of staff grip position according to described induction information, determine the position that staff grips.
In such scheme, described induction information is: staff grips the induced voltage on the inductance capacitance of generation; Staff grip position is different, and described induced voltage is different.
In such scheme, the described coordinate information according to described induction information generation staff grip position is: after amplifying, convert described induced voltage to binary digital signal, convert described digital signal to two-dimensional position coordinate information (x, y) and store.
In such scheme, the position that the described position gripped according to described staff adjusts dummy keyboard is: according to described location coordinate information (x, y) adjust side-play amount generating virtual keyboard coordinate information (x ', y '), and according to the position of the coordinate information of described dummy keyboard (x ', y ') adjustment dummy keyboard; Wherein,
Described adjustment side-play amount is: add on the basis of location coordinate information (x, y) or deduct the numerical value pre-set.
The embodiment of the present invention additionally provides a kind of device of automatic adjustment virtual keyboard position, and this device comprises: induction module and adjusting module; Wherein,
Described induction module, for obtaining the position that staff grips;
Described adjusting module, the position for gripping according to described staff adjusts the position of dummy keyboard.
In such scheme, described induction module comprises: sensor circuit and automatic detection circuit; Wherein,
Described sensor circuit, for producing induction information between staff;
Described automatic detection circuit, for detecting described induction information, produces the coordinate information of staff grip position according to described induction information; And reporting interruption signal.
In such scheme, described sensor circuit comprises: induction antenna;
Described induction antenna, specifically for when staff grips, and produces inductance capacitance between staff, and the position that hand grips is different, and varying in size of inductance capacitance, the induced voltage on inductance capacitance is also different.
In such scheme, described automatic detection circuit, specifically comprises: discharge circuit, A/D change-over circuit and microcontroller (MCU); Wherein,
Described discharge circuit, specifically for amplifying the induced voltage on described inductance capacitance;
Described A/D change-over circuit, specifically for converting the induced voltage after described amplification to digital signal;
Described MCU, specifically for converting described digital signal to two-dimensional position coordinate information (x, y), is stored in internal storage by described location coordinate information; And reporting interruption signal.
In such scheme, described adjusting module comprises: main application process (AP HOST) chip;
Described AP HOST chip, for responding described look-at-me, the position of the coordinate information adjustment dummy keyboard of the staff grip position produced according to described automatic detection circuit to singlehanded can the scope of touch-control.
In such scheme, described AP HOST chip specifically comprises: baseband processor;
Described baseband processor, specifically for after receiving look-at-me, passes through I
2c bus communicates with described MCU, reads the two-dimensional position coordinate information (x, y) stored in MCU; The basis of described location coordinate information (x, y) adjusts the coordinate information (x ', y ') of side-play amount generating virtual keyboard, and according to the position of the coordinate information of described dummy keyboard (x ', y ') adjustment dummy keyboard.
Embodiments provide a kind of method and apparatus of automatic adjustment virtual keyboard position, obtain the position that staff grips, and adjust the position of dummy keyboard according to the position that described staff grips; So, user, when change hand grip position, can realize the scope of singlehanded input to user according to the position of the position adjustment dummy keyboard of user's handling, user-friendly, improves input efficiency and Consumer's Experience.
Accompanying drawing explanation
The method flow schematic diagram of the automatic adjustment virtual keyboard position that Fig. 1 provides for the embodiment of the present invention;
The apparatus structure schematic diagram of the automatic adjustment virtual keyboard position that Fig. 2 provides for the embodiment of the present invention;
The schematic block circuit diagram of the device of the automatic adjustment virtual keyboard position that Fig. 3 provides for the embodiment of the present invention;
The typical application circuit figure of the device of the automatic adjustment virtual keyboard position that Fig. 4 provides for the embodiment of the present invention;
The workflow schematic diagram of the automatic adjustment virtual keyboard position that Fig. 5 provides for the embodiment of the present invention;
The schematic flow sheet of the baseband processor adjustment virtual keyboard position of the AP HOST chip that Fig. 6 provides for the embodiment of the present invention.
Embodiment
The present invention is in example, obtains the position that staff grips; And the position of dummy keyboard is adjusted according to the position that described staff grips.
Below by drawings and the specific embodiments, the present invention is described in further detail.
The embodiment of the present invention realizes a kind of method of automatic adjustment virtual keyboard position, and as shown in Figure 1, the method comprises the following steps:
Step 101: obtain the position that staff grips;
Concrete, when staff grips mobile terminal, between described mobile terminal and staff, produce induction information, and produce the coordinate information of staff grip position according to described induction information, thus determine that staff grips the position of described mobile terminal;
Described induction information is: the induced voltage on the inductance capacitance produced between mobile terminal and staff, and staff grip position is different, varying in size of described induced voltage;
This step also comprises: mobile terminal converts described induced voltage to binary digital signal after amplifying, and converts described digital signal to two-dimensional position coordinate information (x, y) and stores, thus determining the position that staff grips;
Concrete, inductive voltage value on inductance capacitance corresponding to diverse location or threshold value can store by described mobile terminal, produce induced voltage when staff grips and after this voltage transitions is become digital signal, the particular location that staff grips can be determined by the mode of tabling look-up; Above-mentioned example is not limited to embodiments of the present invention, can decide the design on hardware and software obtaining location coordinate information according to design needs and products characteristics;
Wherein, location coordinate information (x, y) represents that staff grips the position coordinates of mobile terminal; Such as, with the central point of mobile terminal for true origin 0 point, be horizontal and vertically respectively x, y direction, describe accurate positional information according to staff grip position with coordinate (x, y); In actual applications, the position of true origin can be changed as required, do not affect the enforcement of method.
Step 102: according to the position of the position adjustment dummy keyboard that described staff grips;
Concrete, mobile terminal is according to described location coordinate information (x, y) adjust side-play amount produce dummy keyboard coordinate information (x ', y '), and according to the coordinate information of described dummy keyboard (x ', y ') position of adjustment dummy keyboard, described dummy keyboard is positioned at user is singlehanded can the scope of touch-control;
Wherein, described adjustment side-play amount is: add on the basis of location coordinate information (x, y) or deduct the numerical value pre-set;
Such as, user is singlehanded can the optimum operation scope of touch-control be 3 inch, and when the positional distance people hand position of dummy keyboard is outside this scope, the position of dummy keyboard is adjusted within 3 inch of staff grip position by the position gripped according to staff; Described side-play amount can the scope of touch-control can be arranged according to described one hand.
In order to realize said method, embodiments of the invention also provide a kind of device of automatic adjustment virtual keyboard position, and as shown in Figure 2, this device comprises: induction module 21 and adjusting module 22; Wherein,
Described induction module 21, for obtaining the position that staff grips;
Described adjusting module 22, the position for gripping according to described staff adjusts the position of dummy keyboard;
Described induction module 21 specifically comprises: sensor circuit 31 and automatic detection circuit 32; Wherein,
Described sensor circuit 31, for generation of the induction information between staff;
Described automatic detection circuit 32, for detecting described induction information, produces the coordinate information of staff grip position according to described induction information, and reporting interruption signal;
Described sensor circuit 31 comprises: induction antenna; Described induction antenna, specifically for when staff grips mobile terminal, have capacitive sensing between induction antenna and staff, the position that hand grips is different, varying in size of inductance capacitance, then the induced voltage on electric capacity is different, thus the position that perception hand grips;
Described automatic detection circuit 32 specifically comprises: discharge circuit, A/D change-over circuit and MCU; Described discharge circuit, specifically for amplifying the induced voltage on described inductance capacitance;
Described A/D change-over circuit, specifically for converting the induced voltage after described amplification to digital signal;
Described MCU, specifically for converting described digital signal to two-dimensional position coordinate information (x, y), is stored in internal storage by described location coordinate information; And reporting interruption signal;
Concrete, inductive voltage value on inductance capacitance corresponding to diverse location or threshold value can store by described MCU, induced voltage after this voltage transitions is become digital signal, described MCU can determine the particular location that staff grips by the mode of tabling look-up is produced when staff grips; Above-mentioned example is not limited to embodiments of the present invention, can decide the design on hardware and software obtaining location coordinate information according to design needs and products characteristics;
Described adjusting module 22 comprises: main application process (AP HOST, Application ProcessingHOST) chip 33; Described AP HOST chip 33, for responding described look-at-me, the position of the coordinate information adjustment dummy keyboard of the staff grip position produced according to described automatic detection circuit to singlehanded can the scope of touch-control; Such as, one hand can the optimum operation scope of touch-control be 3 inch, and when the positional distance people hand position of dummy keyboard is outside this scope, the position of dummy keyboard is adjusted within 3 inch of staff grip position by the position gripped according to staff;
Described AP HOST chip 33 specifically comprises: baseband processor; Described baseband processor, specifically for after receiving look-at-me, passes through I
2c bus communicates with described MCU, reads the two-dimensional position coordinate information (x, y) stored in MCU; The basis of described location coordinate information (x, y) adjusts the coordinate information (x ', y ') of side-play amount generating virtual keyboard, and according to the position of the coordinate information of described dummy keyboard (x ', y ') adjustment dummy keyboard; Described side-play amount can the scope of touch-control can be arranged according to above-mentioned one hand.
The schematic block circuit diagram of the device of the automatic adjustment virtual keyboard position that the embodiment of the present invention provides as shown in Figure 3, comprising:
Sensor circuit 31, automatic detection circuit 32 and AP HOST chip 33;
Described sensor circuit 31 is positioned at the back side of mobile terminal, when staff grips mobile terminal, produces induction information between sensor circuit 31 and staff; The difference of staff grip position can cause described induction information also difference to some extent;
After the sensor circuit 31 at staff and the mobile terminal back side produces induction information, automatic detection circuit 32 detects this induction information, and according to described difference, induction information is converted to the location coordinate information of staff gripping, thus determine the position that staff grips, and reporting interruption signal is to AP HSOT chip 33;
The look-at-me that AP HOST chip 33 reports according to automatic detection circuit 32, by the data-interface between automatic detection circuit 32, read staff in automatic detection circuit 32 and grip the location coordinate information of mobile terminal, and adjust according to the position of described location coordinate information to dummy keyboard, described dummy keyboard is positioned at user is singlehanded can the scope of touch-control, reach the object facilitating touch-control dummy keyboard interface.
The typical application circuit figure of the device of the automatic adjustment virtual keyboard position that the embodiment of the present invention provides as shown in Figure 4;
Describe a complete system in circuit shown in Fig. 4, mainly three part compositions as shown in Figure 3, be respectively sensor circuit 31, automatic detection circuit 32 and AP HOST chip 33.Sensor circuit 31 is made up of the induction antenna 41 being positioned at the mobile terminal back side; Automatic detection circuit 32 is made up of discharge circuit 42, A/D change-over circuit 43 and MCU44; AP HOST chip 33 is made up of the baseband processor 45 of mobile terminal.Induction antenna 41 is connected with automatic detection circuit 32 by reed, and automatic detection circuit 32 is by look-at-me, I
2c bus is connected with the baseband processor of AP HOST chip 33.
After mobile terminal starts, said system circuit is started working.When user's hand grips mobile terminal, induction antenna 41 relies on the capacitive sensing effect between staff to produce inductance capacitance; The position that staff grips mobile terminal is different, and the size of inductance capacitance is also different, thus induced voltage also difference to some extent on described inductance capacitance.Because this induced voltage is comparatively faint, therefore discharge circuit 42 is needed to amplify described induced voltage, signal after amplification is analog voltage signal, through A/D change-over circuit 43, analog to digital conversion is carried out to described analog voltage signal, obtain binary digital signal, give MCU44 by above-mentioned digital signal, MCU converts two-dimensional position coordinate information (x to according to its this digital signal of large young pathbreaker, y), and be stored in internal storage, as the positional information that staff grips.When the position that staff grips mobile terminal changes, inductance capacitance between staff and induction antenna 41 changes, the position that hand grips is different, the size of inductance capacitance is also different, the change of electric capacity causes the change of induced voltage, thus produce new induced voltage, described induced voltage is after described discharge circuit 42 and A/D change-over circuit 43, new induced voltage is converted to new two-dimensional position coordinate information by MUC44, original position coordinate information in new location coordinate information and storer contrasts, when location coordinate information has significant change, MCU stores new location coordinate information, and reporting interruption signal is to baseband processor 45, after baseband processor 45 receives look-at-me, pass through I
2c bus communicates with MCU44, read the location coordinate information (x, y) in MCU44 internal storage, thus obtain the position that hand grips mobile terminal, baseband processor 45 adjusts virtual keyboard position according to the location coordinate information (x, y) of described reading can within the scope of touch-control to user's one hand.
The workflow diagram of the automatic adjustment virtual keyboard position that the embodiment of the present invention provides as shown in Figure 5, comprising:
Step 501: sensor circuit and automatic detection circuit start;
Concrete, after mobile terminal normally starts, sensor circuit 31 and automatic detection circuit 32 start, and when staff grips mobile terminal, produce inductance capacitance, inductance capacitance has induced voltage between the induction antenna 41 of staff and sensor circuit 31.
Step 502: detect induction information and whether change;
Concrete, described induced voltage amplifies by the discharge circuit 42 in automatic detection circuit, the induced voltage after described amplification is converted to digital signal through A/D change-over circuit 43, described digital signal is converted to location coordinate information by MCU44, compare with the location coordinate information before in its memory, when described location coordinate information changes, the location coordinate information after storage change, and continue to perform step 503; When described location coordinate information is unchanged, re-execute step 502, continue to detect induction information and whether change.
Step 503: reporting interruption signal;
Concrete, when detecting that location coordinate information changes in step 502, MCU44 reporting interruption signal is to the baseband processor 55 of AP HOST chip 33.
Step 504:AP HOST chip obtains location coordinate information;
Concrete, after the baseband processor 55 of AP HOST chip 33 receives described look-at-me, read the location coordinate information in the internal storage of MCU44.
Step 505:AP HOST chip adjusts virtual keyboard position according to location coordinate information;
Concrete, baseband processor 55 can in the scope of touch-control to user's one hand according to the location coordinate information adjustment virtual keyboard position read in step 504.
The schematic flow sheet of the baseband processor adjustment virtual keyboard position of the AP HOST chip that the embodiment of the present invention provides as shown in Figure 6, comprising:
Step 601: read the location coordinate information that staff grips;
Concrete, baseband processor 55 reads the location coordinate information (x, y) in MCU55 internal storage after receiving the look-at-me that MCU54 reports.
Step 602: according to the coordinate information of described location coordinate information adjustment dummy keyboard;
Concrete, baseband processor 55 is according to the location coordinate information (x read in step 601, y) side-play amount is adjusted, obtain new coordinate information (x ', y '), described new coordinate information (x ', y ') is positioned at user is singlehanded can the scope center of touch-control, and with the coordinate information of this coordinate information (x ', y ') as dummy keyboard.Wherein, described side-play amount is the size of deviser according to mobile terminal, pre-sets numerical value in the terminal, therefore, in above-mentioned steps, at location coordinate information (x, y) basis adds or deducts side-play amount and obtain new coordinate information (x ', y ');
Such as, the mobile terminal of 5 inch screens, can pre-set longitudinal axis amount is 2cm, with mobile terminal central point for true origin, suppose that the position coordinates that staff grips is (0,0), then can deduct side-play amount by ordinate and obtain new coordinate information (0,-2), with the center point coordinate that (0 ,-2) are dummy keyboard;
Generally, only longitudinally adjust virtual keyboard position, laterally constant, if but need, the longitudinal axis and transverse axis side-play amount can be pre-set according to designing requirement and products characteristics, adjust side-play amount in machine and transverse direction according to the method described above, obtain new coordinate information.
Step 603: initialization of virtual keyboard display interface;
Concrete, baseband processor 55 is according to above-mentioned coordinate information (x ', y ') initialization of virtual keyboard, and making the display position of described dummy keyboard on interface be in user's one hand can within the scope of touch-control, facilitate user to carry out one hand input.
Step 604: judge whether to receive look-at-me;
Concrete, when the virtual keyboard position of baseband processor 55 completing steps 603 adjust and is presented at after on interface, continue detection MCU54 whether reporting interruption signal; When baseband processor 55 receives the look-at-me that MCU54 reports, return and re-execute step 601, readjust the position of dummy keyboard according to above-mentioned steps; When baseband processor 55 does not receive the look-at-me that MCU54 reports, virtual keyboard position has adjusted.
As can be seen from above-described embodiment, the method of automatic adjustment mobile terminal virtual keyboard position provided by the invention, user is made to be hold by one hand giant-screen mobile terminal when inputting, the position of mobile terminal is gripped by perception user hand, and according to grip position adjustment virtual keyboard position to singlehanded can the scope of touch-control, solve the problem of carrying out singlehanded information input when being hold by one hand mobile terminal, improve Consumer's Experience significantly.Meanwhile, resolution circuitry simplicity of design provided by the invention, dependable performance, with low cost, be convenient to realize.
The above; be only preferred embodiment of the present invention; be not intended to limit protection scope of the present invention; for those skilled in the art; without departing from the principles of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. automatically adjust a method for virtual keyboard position, it is characterized in that, the method comprises:
Obtain the position that staff grips;
According to the position of the position adjustment dummy keyboard that described staff grips.
2. method according to claim 1, is characterized in that, the position that described acquisition staff grips is: gripped by staff and produce induction information, and produce the coordinate information of staff grip position according to described induction information, determine the position that staff grips.
3. method according to claim 2, is characterized in that, described induction information is: staff grips the induced voltage on the inductance capacitance of generation; Staff grip position is different, and described induced voltage is different.
4. method according to claim 3, it is characterized in that, the described coordinate information according to described induction information generation staff grip position is: after amplifying, convert described induced voltage to binary digital signal, convert described digital signal to two-dimensional position coordinate information (x, y) and store.
5. method according to claim 4, it is characterized in that, the position that the described position gripped according to described staff adjusts dummy keyboard is: according to described location coordinate information (x, y) adjust side-play amount generating virtual keyboard coordinate information (x ', y '), and according to the position of the coordinate information of described dummy keyboard (x ', y ') adjustment dummy keyboard; Wherein,
Described adjustment side-play amount is: add on the basis of location coordinate information (x, y) or deduct the numerical value pre-set.
6. automatically adjust a device for virtual keyboard position, it is characterized in that, this device comprises: induction module and adjusting module; Wherein,
Described induction module, for obtaining the position that staff grips;
Described adjusting module, the position for gripping according to described staff adjusts the position of dummy keyboard.
7. device according to claim 6, is characterized in that, described induction module comprises: sensor circuit and automatic detection circuit; Wherein,
Described sensor circuit, for producing induction information between staff;
Described automatic detection circuit, for detecting described induction information, produces the coordinate information of staff grip position according to described induction information; And reporting interruption signal.
8. device according to claim 7, is characterized in that, described sensor circuit comprises: induction antenna;
Described induction antenna, specifically for when staff grips, and produces inductance capacitance between staff, and the position that hand grips is different, and varying in size of inductance capacitance, the induced voltage on inductance capacitance is also different.
9. device according to claim 8, is characterized in that, described automatic detection circuit, specifically comprises: discharge circuit, A/D change-over circuit and microcontroller (MCU); Wherein,
Described discharge circuit, specifically for amplifying the induced voltage on described inductance capacitance;
Described A/D change-over circuit, specifically for converting the induced voltage after described amplification to digital signal;
Described MCU, specifically for converting described digital signal to two-dimensional position coordinate information (x, y), is stored in internal storage by described location coordinate information; And reporting interruption signal.
10. device according to claim 6, is characterized in that, described adjusting module comprises: main application process (AP HOST) chip;
Described AP HOST chip, for responding described look-at-me, the position of the coordinate information adjustment dummy keyboard of the staff grip position produced according to described automatic detection circuit to singlehanded can the scope of touch-control.
11. devices according to claim 10, is characterized in that, described AP HOST chip specifically comprises: baseband processor;
Described baseband processor, specifically for after receiving look-at-me, passes through I
2c bus communicates with described MCU, reads the two-dimensional position coordinate information (x, y) stored in MCU; The basis of described location coordinate information (x, y) adjusts the coordinate information (x ', y ') of side-play amount generating virtual keyboard, and according to the position of the coordinate information of described dummy keyboard (x ', y ') adjustment dummy keyboard.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310542872.6A CN104615345B (en) | 2013-11-05 | 2013-11-05 | Method and device for automatically adjusting position of virtual keyboard |
| PCT/CN2014/077318 WO2014180358A1 (en) | 2013-11-05 | 2014-05-12 | Method and apparatus for automatically adjusting position of virtual keyboard |
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| CN201310542872.6A CN104615345B (en) | 2013-11-05 | 2013-11-05 | Method and device for automatically adjusting position of virtual keyboard |
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| CN107924285A (en) * | 2015-08-28 | 2018-04-17 | 三星电子株式会社 | Electronic equipment and its operating method |
| CN106951135A (en) * | 2017-02-06 | 2017-07-14 | 努比亚技术有限公司 | A kind of method and terminal for realizing the adjustment of input tool column |
| CN107656716A (en) * | 2017-09-05 | 2018-02-02 | 珠海格力电器股份有限公司 | A kind of content display method and its device, electronic equipment |
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| Publication number | Publication date |
|---|---|
| WO2014180358A1 (en) | 2014-11-13 |
| CN104615345B (en) | 2020-06-09 |
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