CN103677469A - System for achieving capacitance detection and electromagnetic detection - Google Patents
System for achieving capacitance detection and electromagnetic detection Download PDFInfo
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- CN103677469A CN103677469A CN201310601190.8A CN201310601190A CN103677469A CN 103677469 A CN103677469 A CN 103677469A CN 201310601190 A CN201310601190 A CN 201310601190A CN 103677469 A CN103677469 A CN 103677469A
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Abstract
The invention relates to the field of touch control and discloses a system for achieving capacitance detection and electromagnetic detection. A transverse row of wires and a vertical row of wires included by a sensing antenna multiplex array are located in a touch area of a touch control screen panel, a capacitance and electromagnetic touch control chip is provided with a TX end, an RX end and an EM Detect end, one end of the TX end, one end of the RX end and one end of the EM Detect end are respectively provided with one chip lead in a multiplex mode, and the other end of the TX end, the other end of the RX end and the other end of the EM Detect end are connected with one end of the transverse row of the wires and one end of the vertical row of the wires. When capacitance touch detection is carried out on the system, all switches in a switch array are turned off, and the transverse row of the wires and the vertical row of the wires constitute sensors of a capacitance screen; when electromagnetic touch detection is carried out on the system, all the switches are turned on, and the transverse row of the wires and the vertical row of the wires constitute antenna loops of an electromagnetic screen; when a part of the switches are turned off and a part of the switches are turned on, a part of the transverse row of the wires and a part of the vertical row of the wires constitute the sensors of the capacitance screen, and a part of the transverse row of the wires and a part of the vertical row of the wires constitute the antenna loops of the electromagnetic screen. Compared with the prior art, time division multiplex access of capacitance detection and electromagnetic detection is achieved through one set of sensing antennas on the single chip.
Description
Technical field
The present invention relates to touch technology field, particularly realize the system of capacitance detecting and electromagnetic detection.
Background technology
Touch-screen is as a kind of special computer peripheral equipment, a human-computer interaction interface between electronic system and user can be provided, and in widespread use in a lot of fields, for example, at mobile phone, personal digital assistant (Personal Digital Assistant, PDA), game machine, liquid crystal display (Liquid Crystal Display, LCD), plasma display (Plasma Display Panel, PDP) etc.
At present, touch-screen mainly contains following a few class: electromagnetical type touch screen, capacitive touch screen, electric group of formula touch-screen and infrared-type touch-screen etc.
Wherein, capacitive touch screen generally all adopts front attached formula, in it, be provided with (as tin indium oxide material) capacitance touching control drive electrode and the capacitance touching control induction electrode of transparent conductive material, mutually insulated between described capacitance touching control drive electrode and capacitance touching control induction electrode, when touch screen, owing to there being electric field in human body, between the capacitance touching control drive electrode in finger and touch-screen, capacitance touching control induction electrode, form coupling capacitance; Due to the capacitance variations of touch point, in described capacitance touching control drive electrode and capacitance touching control induction electrode, there is flowing to the induction current of touch point, by correlation computations, just can accurately calculate the position of touch point.
Electromagnetical type touch screen generally all adopts the electromagnetic antenna plate of the attached formula of the back of the body at present, this antenna plate is to have the staggered metal wire of transverse and longitudinal to form, when time writer slides on screen, produce induction electromotive force, position the closer to time writer, the induction electromotive force at this place is stronger, by correlation computations, just can accurately calculate the position of time writer.Because metal wire is nontransparent, therefore can only be attached to liquid crystal display module (Liquid Crystal Display Module, LCM) rear side.
At present, in order to realize hand, the two touch-controls of pen, by the use that is superimposed of capacitance touching control pattern and electromagnetic touch-control pattern, to realize hand-written and pen, write the control mode touch mode of combination, the touch area of this capacitance touching control pattern need to be arranged on the touch area of electromagnetic touch-control pattern, that is to say and need to need to arrange on touch control device two separate array structures same, and make it mutual stack, to can realize the identification of the positional information of two kinds of patterns, yet, each array circuit need to connect treatment circuit separately, make the complex structure of whole touch-control product, volume is larger, cost of manufacture is high, and in the use procedure of touch-control product, also there will be the phase mutual interference of capacitance touching control pattern and electromagnetic touch-control pattern, in addition, capacitance touching control drive electrode and capacitance touching control induction electrode are produced on a chip, and electromagnetic antenna plate is produced on another one chip, causes finished product thickness thicker, do not meet the demand of existing market, and cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of system that realizes capacitance detecting and electromagnetic detection, make touch-control product more frivolous, simple in structure, with low cost, and can realize capacitance detecting and electromagnetic detection simultaneously.
For solving the problems of the technologies described above, first embodiment of the invention provides a kind of system that realizes capacitance detecting and electromagnetic detection, it is characterized in that, comprises: touch screen panel, electric capacity and electromagnetism touch-control chip, the antenna multiplexed array of sensing;
The antenna multiplexed array of described sensing is positioned at the touch area of described touch screen panel, comprises change-over switch array, horizontally-arranged wire and vertical setting of types wire;
Described change-over switch array comprises some electronic switches;
Every two described horizontally-arranged wires or vertical setting of types wire are connected by a described electronic switch;
Described electric capacity and electromagnetism touch-control chip have capacitance detecting transmitting terminal TX, capacitance detecting receiving end RX and electromagnetic surveying end EM Detect; The multiplexing described electric capacity in one end of described TX, RX and EM Detect and the pin of electromagnetism touch-control chip, the other end is connected with one end of described horizontally-arranged wire or described vertical setting of types wire respectively;
When all electronic switches of described change-over switch array are during in off-state, each root in described horizontally-arranged wire and described vertical setting of types wire is individualism all, form sensor, described electric capacity and electromagnetism touch-control chip are sent and drive signal to described sensor by described TX, and receive induced signal by described RX, carry out the capacitance detecting of touch point;
When whole electronic switches of described change-over switch array are during in closure state, in described horizontally-arranged wire or vertical setting of types wire, connect between two, form antenna loop, described electric capacity and electromagnetism touch-control chip receive the induced signal on described antenna loop by described EM Detect, carry out the electromagnetic detection of touch point.
When the portions of electronics switch of described change-over switch array is in off-state, all the other electronic switches during in closure state, the described horizontally-arranged wire being connected with the described electronic switch in off-state or vertical setting of types wire individualism, the horizontally-arranged wire of described individualism or vertical setting of types wire form sensor; The described horizontally-arranged wire being connected with the described electronic switch in closure state or vertical setting of types wire are connected between two, form antenna loop.
Compared with prior art, the electric capacity in the present invention and electromagnetism touch-control chip are single chips, realize capacitance detecting and electromagnetic detection on single chips, make to touch product more frivolous, have reduced greatly the cost of product, the antenna multiplexed array of sensing and change-over switch array are used in conjunction with each other, make the present invention only need to use a set of horizontally-arranged wire and vertical setting of types wire, can carry out separately capacitance detecting, can carry out separately electromagnetic detection again, also can capacitance detecting and electromagnetic detection carry out simultaneously, making to touch product structure simplifies, and the time-sharing multiplex of realizing capacitance touching control sensor and electromagnetism touch-control antenna by the antenna multiplexed array of sensing is (when to be the antenna multiplexed array of sensing use as sensor, carry out capacitance detecting, when the antenna multiplexed array of sensing is used as antenna, carry out electromagnetic detection), effectively avoided the problem of the phase mutual interference of capacitance touching control pattern and electromagnetic touch-control pattern in prior art, in addition, the electric capacity in the present invention and electromagnetism touch-control chip have TX, RX and EM Detect, have guaranteed transmitting and receiving and the detection of electromagnetic signal touch point capacitance signal.
In addition, each pin being connected with horizontally-arranged wire or vertical setting of types wire of electric capacity in the present invention and electromagnetism touch-control chip is connected with an EM Detect with a TX, a RX by on-off element, and controls being communicated with and disconnection of described pin and described TX, RX and EM Detect by described on-off element;
When described on-off element, control described pin and be communicated with described TX or described RX, while disconnecting with described EM Detect, described electric capacity and electromagnetism touch-control chip carry out capacitance touch detection;
When described on-off element, control described pin and described TX and described RX and disconnect, while being communicated with described EM Detect, described electric capacity and electromagnetism touch-control chip carry out electromagnetic touch detection.
Because each pin being connected with horizontally-arranged wire or vertical setting of types wire of electric capacity and electromagnetism touch-control chip is connected with an EM Detect with a TX, a RX by on-off element, just can effectively the antenna multiplexed array of sensing be realized to the time-sharing multiplex of capacitive transducer and electromagnetic antenna, guarantee the realization of whole technical essential in the present invention.
In addition, described electric capacity and electromagnetism touch-control chip also comprise sensing control element, for generation of the control signal of controlling described change-over switch array;
When described electric capacity and electromagnetism touch-control chip carry out electromagnetic touch while detecting, described electric capacity and electromagnetism touch-control chip scan successively two horizontally-arranged wires or two vertical setting of types wires and couple together the antenna loop forming, and read the induced signal on the antenna in described formation loop;
While scanning each time, the horizontally-arranged wire that described sensing control element is connected according to the wish of described electric capacity and the appointment of electromagnetism touch-control chip or the information of vertical setting of types wire, produce control signal and send to described change-over switch array; Described change-over switch array, according to the control signal receiving, couples together the horizontally-arranged wire of described appointment or vertical setting of types wire;
Wherein, the horizontally-arranged wire of described appointment or vertical setting of types wire comprise in horizontally-arranged wire or vertical setting of types wire between two or many groups.
Existence just because of above-mentioned sensing control element, just can make change-over switch array can receive the control signal that electric capacity and electromagnetism touch-control chip send, effectively control connection and the disconnection of horizontally-arranged wire or the vertical setting of types wire of appointment, realize final capacitance touch detection or electromagnetic touch and detect.
In addition, described horizontally-arranged wire and vertical setting of types wire lay respectively at two different planes.
Horizontally-arranged wire is positioned at different planes from vertical setting of types wire, makes in horizontally-arranged wire and vertical setting of types wire any two wires insulated from each other, prevents short circuit, is accurately to carry out that capacitance touch detects and the prerequisite of electromagnetic touch detection.
In addition, described change-over switch array comprises a connecting line and several electronic switches, and wherein, the number of electronic switch is consistent with the sum of horizontally-arranged wire and vertical setting of types wire.
When electric capacity and electromagnetism touch-control chip are during as electromagnetic touch detection system, when change-over switch array comprises a connecting line and several electronic switches, electromagnetic touch detecting pattern just can scan certain two antenna loop that wire is connected to form in horizontally-arranged wire and vertical setting of types wire.
As a further improvement on the present invention, described change-over switch array comprises and several electronic switches, and wherein, the number of electronic switch is consistent with the sum of horizontally-arranged wire and vertical setting of types wire, and electronic switch is multicontact switch.
When electric capacity and electromagnetism touch-control chip are during as electromagnetic touch detection system, when change-over switch array comprises some connecting lines and several electronic switches, electromagnetic touch detecting pattern just can scan the antenna loop that in horizontally-arranged wire and vertical setting of types wire, many group wires are connected to form.
In addition, when described capacitance touch detects as mutual capacitance touch detection, described TX is connected with described horizontally-arranged wire or described vertical setting of types wire respectively with described RX.
Place in horizontally-arranged wire and vertical setting of types wire intersection forms electric capacity, when detecting mutual capacitance size, the TX being connected with horizontally-arranged wire sends and transmits successively, the RX being connected with vertical setting of types wire receives signal simultaneously, so just can obtain the capacitance size of all horizontally-arranged wires and vertical setting of types wire joint, it is the capacitance size of the two dimensional surface of whole touch-screen, according to touch screen two-dimensional capacitance change data, just can calculate the coordinate of each touch point, therefore, even if there are a plurality of touch points on screen, also can calculate the true coordinate of each touch point.
In addition, when described capacitance touch detects as self-capacitance touch detection, described TX is unsettled, and described RX is connected with described horizontally-arranged wire or described vertical setting of types wire.
These horizontally-arranged wires and vertical setting of types wire form electric capacity with ground respectively, and this electric capacity is exactly usually said self-capacitance, namely electrode electric capacity over the ground.When finger touch is when the capacitance plate, the electric capacity of finger will be added in screen body capacitance, and making to shield body capacitance amount increases, then according to the variation of electric capacity before and after touching, determines respectively lateral coordinates and along slope coordinate, is then combined into the touch coordinate of plane.
Accompanying drawing explanation
Fig. 1 is according to the antenna multiplexed array schematic diagram of the sensing in the system that realizes capacitance detecting and electromagnetic detection of first embodiment of the invention;
Fig. 2 is according to pin schematic diagram in the system that realizes capacitance detecting and electromagnetic detection of first embodiment of the invention;
Fig. 3 is the schematic diagram according to change-over switch array comprises a connecting line in the system that realizes capacitance detecting and electromagnetic detection of first embodiment of the invention;
Fig. 4 is the schematic diagram according to change-over switch array comprises some connecting lines in the system that realizes capacitance detecting and electromagnetic detection of second embodiment of the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.Yet, persons of ordinary skill in the art may appreciate that in each embodiment of the present invention, in order to make reader understand the application better, many ins and outs have been proposed.But, even without these ins and outs and the many variations based on following embodiment and modification, also can realize each claim of the application technical scheme required for protection.
The first embodiment of the present invention relates to a kind of system that realizes capacitance detecting and electromagnetic detection.Comprise touch screen panel, electric capacity and electromagnetism touch-control chip, the antenna multiplexed array of sensing (wire array that has both sensor and antenna effect), change-over switch array.
As shown in Figure 1, the antenna multiplexed array of sensing is positioned at the touch area 1 of touch screen panel, comprises horizontally-arranged wire and (uses respectively X
1～X
nrepresent) and vertical setting of types wire (use respectively Y
1～Y
mrepresent), electric capacity and electromagnetism touch-control chip have capacitance detecting transmitting terminal TX, capacitance detecting receiving end RX and electromagnetic surveying end EM Detect, TX, RX are connected respectively (in the present embodiment, will with TX, be connected with horizontally-arranged wire, vertical setting of types wire is connected to example explanation with RX) with one end of horizontally-arranged wire or vertical setting of types wire with EM Detect.Wherein, horizontally-arranged wire and vertical setting of types wire lay respectively at two different planes (in Fig. 1, horizontally-arranged wire represents not at same plane with wire jumper with vertical setting of types wire infall), like this in horizontally-arranged wire and vertical setting of types wire any two wires all by insulated from each other, prevent short circuit, this is the prerequisite of accurately carrying out capacitance touch detection or electromagnetic touch detection.
In addition, each pin of electric capacity in present embodiment and electromagnetism touch-control chip all passes through on-off element 3 and is connected with an EM Detect with a TX, a RX, and the other end of each TX, RX and EM Detect is connected with one end of horizontally-arranged wire or vertical setting of types wire respectively again, by on-off element 3, control being communicated with and disconnection of pins and TX, RX and EM Detect, determine that whole system is the information that receives capacitance detecting information or reception electromagnetic detection information or receive capacitance detecting and electromagnetic detection simultaneously.As shown in Figure 2.
When on-off element 3, control pin and be communicated with TX or RX, while disconnecting with EM Detect, electric capacity and electromagnetism touch-control chip carry out capacitance touch detection;
When on-off element 3, control pin and TX and RX and disconnect, while being communicated with EM Detect, electric capacity and electromagnetism touch-control chip carry out electromagnetic touch detection.
When on-off element 3 is controlled pin simultaneously and is communicated with TX, RX and EM Detect, electric capacity and electromagnetism touch-control chip just can carry out that capacitance touch detects and electromagnetic touch detection simultaneously.
In prior art, each pin being connected with horizontally-arranged wire or vertical setting of types wire is only connected with a RX with a TX, like this just can only realize capacitance touch measuring ability, and in the present embodiment each pin being connected with horizontally-arranged wire or vertical setting of types wire except being connected with a RX with a TX, also increased in addition an EM Detect, and can control they and being connected or disconnection of pin by on-off element 3, and then realize the time-sharing multiplex of capacitive transducer and electromagnetic antenna, guaranteed the realization of whole technical essential in the present invention.
In present embodiment, electric capacity and electromagnetism touch-control chip also comprise sensing control element, when electric capacity and electromagnetism touch-control chip carry out capacitance touch while detecting, as shown in Figure 3, the control signal that sensing control element reception electric capacity and electromagnetism touch-control chip send makes all switches 5 of change-over switch array 4 in off-state, horizontally-arranged wire and vertical setting of types wire form the sensor of capacitance touching control, each root is all used separately, electric capacity and electromagnetism touch-control chip be the sensor transmission driving signal to capacitance touching control by TX, and receive induced signal by RX, carry out the detection of touch point.That is to say, in order to reach the multiplexing of electromagnetism touch-control and capacitance touching control, in touch screen panel the inside, be anyhow all covered with sensor/antenna, and horizontally-arranged wire and vertical setting of types wire are not in one plane, when this touch screen panel is done capacitance plate use, every wire on touch screen panel is all independent, does not form loop.Anyhow the crossing position of wire forms Inductance and Capacitance, and when people's finger slides on capacitance touching control panel, the capacitance of diverse location is different, and capacitance touching control detects the position that judges finger according to the situation of change of each point capacitance.
Capacitance touch in present embodiment detects has mutual capacitance to touch detection and two kinds of modes of self-capacitance touch detection:
When capacitance touch detects as mutual capacitance touch detection, TX is connected with vertical setting of types wire with horizontally-arranged wire respectively with RX, place in horizontally-arranged wire and vertical setting of types wire intersection forms electric capacity, when detecting mutual capacitance size, the TX being connected with horizontally-arranged wire sends and transmits successively, the RX being connected with vertical setting of types wire receives signal simultaneously, so just can obtain the capacitance size of all horizontally-arranged wires and vertical setting of types wire joint, it is the capacitance size of the two dimensional surface of whole touch-screen, according to touch screen two-dimensional capacitance change data, just can calculate the coordinate of each touch point, therefore, even if there are a plurality of touch points on screen, also can calculate the true coordinate of each touch point.
When capacitance touch detects as self-capacitance touch detection, TX is unsettled, and RX is connected with horizontally-arranged wire or vertical setting of types wire, and these horizontally-arranged wires and vertical setting of types wire form electric capacity with ground respectively, and this electric capacity is exactly usually said self-capacitance, namely electrode electric capacity over the ground.When finger touch is when the capacitance plate, the electric capacity of finger will be added in screen body capacitance, and making to shield body capacitance amount increases, then according to the variation of electric capacity before and after touching, determines respectively lateral coordinates and along slope coordinate, is then combined into the touch coordinate of plane.
In present embodiment, change-over switch array 4 comprises a connecting line and several electronic switches 5, and as shown in Figure 3, wherein, the number of electronic switch 5 is consistent with the sum of horizontally-arranged wire and vertical setting of types wire.When electric capacity and electromagnetism touch-control chip carry out electromagnetic touch while detecting, the control signal that sensing control element reception electric capacity and electromagnetism touch-control chip send makes whole electronic switches 5 of change-over switch array 4 in closed condition, one end of certain two wire in horizontally-arranged wire or vertical setting of types wire is coupled together, form antenna loop, electric capacity and electromagnetism touch-control chip receive the induced signal on this antenna loop by EM Detect, carry out the detection of touch point.That is to say, in order to receive the signal of time writer transmitting, horizontally-arranged parallel antenna or vertical setting of types parallel antenna need to be linked up between two, form wire loop.When the magnetic field at coil place changes, on coil, can produce induced signal.Along with the change of time writer writing position, the magnetic field that the electromagnetic wave signal that time writer sends produces also changes thereupon, and the induced signal producing on each coil is also changed.Electromagnetic touch detects the writing position that judges time writer according to the variation of the induced signal of each coil.
Electric capacity and electromagnetism touch-control chip scan successively two horizontally-arranged wires or two vertical setting of types wires and couple together the antenna loop forming, read the induced signal on the antenna that forms loop, while scanning each time, the horizontally-arranged wire that sensing control element is connected according to the wish of electric capacity and the appointment of electromagnetism touch-control chip or the information of vertical setting of types wire, produce control signal and send to change-over switch array 4, change-over switch array 4, according to the control signal receiving, couples together two horizontally-arranged wires of appointment or vertical setting of types wire.
Existence just because of above-mentioned sensing control element, just can make change-over switch array 4 can receive the control signal that electric capacity and electromagnetism touch-control chip send, effectively control connection and the disconnection of horizontally-arranged wire or the vertical setting of types wire of appointment, realize final capacitance touch detection or electromagnetic touch and detect.
Capacitance detecting in present embodiment and the system of electromagnetic detection can be carried out separately capacitance touching control detection or electromagnetism touch control detection, also can capacitance touching control detect and electromagnetism touch control detection is carried out simultaneously.
When touch screen panel is subject to electromagnetic touch, the control signal that sensing control element sends by electric capacity and electromagnetism touch-control chip, controlling change-over switch array 4 couples together the horizontally-arranged wire of appointment and vertical setting of types wire to form electromagnetic antenna loop, now electromagnetic touch detecting pattern work, capacitance touch detecting pattern is not worked;
When touch screen panel is subject to capacitance touch, the control signal that sensing control element sends by electric capacity and electromagnetism touch-control chip is controlled change-over switch array 4 and is all disconnected, horizontally-arranged wire and vertical setting of types wire form capacitive transducer, now capacitance touch detecting pattern work, electromagnetic touch detecting pattern is not worked.
When contact panel is subject to capacitance touch and electromagnetic touch simultaneously, on-off element 3 is controlled pin simultaneously and is communicated with TX, RX and EM Detect, the control signal that sensing control element sends by electric capacity and electromagnetism touch-control chip, controlling change-over switch array 4 couples together part horizontally-arranged wire and vertical setting of types wire to form electromagnetic antenna loop, and another part horizontally-arranged wire and vertical setting of types wire are coupled together to formation capacitive transducer, now capacitance touch detecting pattern and electromagnetic touch detecting pattern are worked simultaneously.
Capacitance touch measuring ability and electromagnetic touch measuring ability have both, and can use separately, also can use simultaneously, do not interfere with each other each other, make whole system function more comprehensive, hommization more, and practicality is stronger.
Compared with prior art, capacitance detecting in the present invention and electromagnetic testing system are produced on single chips, realize capacitance detecting and electromagnetic detection on single chips, reduce the integral thickness of touch screen, make to touch product more frivolous, reduced greatly the cost of product, the antenna multiplexed array of sensing and change-over switch array 4 are used in conjunction with each other, make the present invention only need to use a set of horizontally-arranged wire and vertical setting of types wire, can carry out separately capacitance detecting, can carry out separately electromagnetic detection again, also can capacitance detecting and electromagnetic detection carry out simultaneously, making to touch product structure simplifies, and the time-sharing multiplex of realizing sensor and antenna by the antenna multiplexed array of sensing is (when to be the antenna multiplexed array of sensing use as sensor, carry out capacitance detecting, when the antenna multiplexed array of sensing is used as antenna, carry out electromagnetic detection), effectively avoided the problem of the phase mutual interference of capacitance touching control pattern and electromagnetic touch-control pattern in prior art, in addition, the electric capacity in the present invention and electromagnetism touch-control chip have transmitting terminal TX, receiving end RX and electromagnetic surveying end EM Detect, have guaranteed transmitting and receiving and the detection of electromagnetic signal touch point capacitance signal.
The second embodiment of the present invention relates to a kind of system that realizes capacitance detecting and electromagnetic detection.The second embodiment and the first embodiment are roughly the same, key distinction part is: in the first embodiment, change-over switch array 4 comprises a connecting line and several electronic switches 5, when electric capacity and electromagnetism touch-control chip carry out electromagnetic touch while detecting, change-over switch array 4 couples together one end of certain two wire in horizontally-arranged wire or vertical setting of types wire, form antenna loop, electric capacity and electromagnetism touch-control chip, by receiving the induced signal on this antenna loop, carry out the detection of touch point.And in second embodiment of the invention, change-over switch array 4 comprises some lines and several electronic switches 5, when electric capacity and electromagnetism touch-control chip carry out electromagnetic touch while detecting, change-over switch array 4 by horizontally-arranged wire or vertical setting of types wire between two or one end of organizing wire more couple together, form some antenna loops, electric capacity and electromagnetism touch-control chip, by receiving the induced signal on these antenna loop, carry out the detection of touch point.
Specifically, change-over switch array 4 comprises some lines and several electronic switches 5, and wherein, the number of electronic switch 5 is consistent with the sum of horizontally-arranged wire and vertical setting of types wire, and electronic switch 5 is multicontact switch.As shown in Figure 4, when electric capacity and electromagnetism touch-control chip are during as electromagnetic touch detection system, electric capacity and electromagnetism touch-control chip scan successively many group horizontally-arranged wires or vertical setting of types wire and couple together the antenna loop forming, read the induced signal on the antenna that forms loop, while scanning each time, the horizontally-arranged wire that sensing control element is connected according to the wish of electric capacity and the appointment of electromagnetism touch-control chip or the information of vertical setting of types wire, produce control signal and send to change-over switch array 4, change-over switch array 4 is according to the control signal receiving, the horizontally-arranged wire of appointment or vertical setting of types wire are coupled together, form aerial array, electromagnetic screen master chip reads the induced signal on each antenna loop successively.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above are to realize specific embodiments of the invention, and in actual applications, can to it, do various changes in the form and details, and without departing from the spirit and scope of the present invention.
Claims (8)
1. a system that realizes capacitance detecting and electromagnetic detection, is characterized in that, comprises: touch screen panel, electric capacity and electromagnetism touch-control chip, the antenna multiplexed array of sensing;
The antenna multiplexed array of described sensing is positioned at the touch area of described touch screen panel, comprises change-over switch array, horizontally-arranged wire and vertical setting of types wire;
Described change-over switch array comprises some electronic switches;
Every two described horizontally-arranged wires or vertical setting of types wire are connected by a described electronic switch;
Described electric capacity and electromagnetism touch-control chip have capacitance detecting transmitting terminal TX, capacitance detecting receiving end RX and electromagnetic surveying end EM Detect; The multiplexing described electric capacity in one end of described TX, RX and EM Detect and the pin of electromagnetism touch-control chip, the other end is connected with one end of described horizontally-arranged wire or described vertical setting of types wire respectively;
When all electronic switches of described change-over switch array are during in off-state, each root in described horizontally-arranged wire and described vertical setting of types wire is individualism all, form sensor, described electric capacity and electromagnetism touch-control chip are sent and drive signal to described sensor by described TX, and receive induced signal by described RX, carry out the capacitance detecting of touch point;
When whole electronic switches of described change-over switch array are during in closure state, in described horizontally-arranged wire or vertical setting of types wire, connect between two, form antenna loop, described electric capacity and electromagnetism touch-control chip receive the induced signal on described antenna loop by described EM Detect, carry out the electromagnetic detection of touch point.
When the portions of electronics switch of described change-over switch array is in off-state, all the other electronic switches during in closure state, the described horizontally-arranged wire being connected with the described electronic switch in off-state or vertical setting of types wire individualism, the horizontally-arranged wire of described individualism or vertical setting of types wire form sensor; The described horizontally-arranged wire being connected with the described electronic switch in closure state or vertical setting of types wire are connected between two, form antenna loop.
2. the system that realizes capacitance detecting and electromagnetic detection according to claim 1, it is characterized in that, each pin being connected with horizontally-arranged wire or vertical setting of types wire of described electric capacity and electromagnetism touch-control chip is connected with an EM Detect with a TX, a RX by on-off element, and controls being communicated with and disconnection of described pin and described TX, RX and EM Detect by described on-off element;
When described on-off element, control described pin and be communicated with described TX or described RX, while disconnecting with described EM Detect, described electric capacity and electromagnetism touch-control chip carry out capacitance touch detection;
When described on-off element, control described pin and described TX and described RX and disconnect, while being communicated with described EM Detect, described electric capacity and electromagnetism touch-control chip carry out electromagnetic touch detection.
3. the system that realizes capacitance detecting and electromagnetic detection according to claim 1, is characterized in that, described electric capacity and electromagnetism touch-control chip also comprise sensing control element, for generation of the control signal of controlling described change-over switch array;
When described electric capacity and electromagnetism touch-control chip carry out electromagnetic touch while detecting, described electric capacity and electromagnetism touch-control chip scan successively two horizontally-arranged wires or two vertical setting of types wires and couple together the antenna loop forming, and read the induced signal on the antenna in described formation loop;
While scanning each time, the horizontally-arranged wire that described sensing control element is connected according to the wish of described electric capacity and the appointment of electromagnetism touch-control chip or the information of vertical setting of types wire, produce control signal and send to described change-over switch array; Described change-over switch array, according to the control signal receiving, couples together the horizontally-arranged wire of described appointment or vertical setting of types wire;
Wherein, the horizontally-arranged wire of described appointment or vertical setting of types wire comprise in horizontally-arranged wire or vertical setting of types wire between two or many groups.
4. the system that realizes capacitance detecting and electromagnetic detection according to claim 1, is characterized in that, described horizontally-arranged wire and vertical setting of types wire lay respectively at two different planes.
5. the system that realizes capacitance detecting and electromagnetic detection according to claim 1, is characterized in that, described change-over switch array comprises a connecting line and several electronic switches, and wherein, the number of electronic switch is consistent with the sum of horizontally-arranged wire and vertical setting of types wire.
6. the system that realizes capacitance detecting and electromagnetic detection according to claim 1, it is characterized in that, described change-over switch array comprises some connecting lines and several electronic switches, wherein, the number of electronic switch is consistent with the sum of horizontally-arranged wire and vertical setting of types wire, and electronic switch is multicontact switch.
7. the system that realizes capacitance detecting and electromagnetic detection according to claim 1, is characterized in that, when described capacitance touch detects as mutual capacitance touch detection, described TX is connected with described horizontally-arranged wire or described vertical setting of types wire respectively with described RX.
8. the system that realizes capacitance detecting and electromagnetic detection according to claim 6, is characterized in that, when described capacitance touch detects as self-capacitance touch detection, described TX is unsettled, and described RX is connected with described horizontally-arranged wire or described vertical setting of types wire.
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| CN201310601190.8A CN103677469A (en) | 2013-11-25 | 2013-11-25 | System for achieving capacitance detection and electromagnetic detection |
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| CN201310601190.8A CN103677469A (en) | 2013-11-25 | 2013-11-25 | System for achieving capacitance detection and electromagnetic detection |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US11233508B2 (en) | 2014-05-06 | 2022-01-25 | Texas Instruments Incorporated | Capacitive touch sensor and method |
| US10534491B2 (en) | 2014-05-06 | 2020-01-14 | Texas Instruments Incorporated | Capacitive touch sensor and method |
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| CN104699317B (en) * | 2015-04-01 | 2017-10-13 | 上海中航光电子有限公司 | Array base palte, display panel and display device |
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| US11216120B2 (en) | 2017-07-04 | 2022-01-04 | Boe Technology Group Co., Ltd. | Touch panel and driving method thereof, and touch device |
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| CN110753139B (en) * | 2019-09-25 | 2021-02-26 | 维沃移动通信有限公司 | Input method and mobile terminal |
| CN110753139A (en) * | 2019-09-25 | 2020-02-04 | 维沃移动通信有限公司 | Input method and mobile terminal |
| CN113471697A (en) * | 2020-03-31 | 2021-10-01 | 昇佳电子股份有限公司 | Transmission architecture of antenna and proximity sensing circuit |
| CN113471697B (en) * | 2020-03-31 | 2023-12-15 | 昇佳电子股份有限公司 | Transmission architecture of antenna and proximity sensing circuit |
| CN113050831A (en) * | 2021-03-17 | 2021-06-29 | 深圳市华星光电半导体显示技术有限公司 | Touch control device |
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| CN113567752A (en) * | 2021-07-22 | 2021-10-29 | 之江实验室 | High dynamic array type capacitance measuring circuit facing touch perception and measuring method thereof |
| CN113567752B (en) * | 2021-07-22 | 2024-04-23 | 之江实验室 | High-dynamic array type capacitance measuring circuit facing tactile perception and measuring method thereof |
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