CN104049813B - A kind of processing method and processing device of interference signal - Google Patents
A kind of processing method and processing device of interference signal Download PDFInfo
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- CN104049813B CN104049813B CN201410274304.7A CN201410274304A CN104049813B CN 104049813 B CN104049813 B CN 104049813B CN 201410274304 A CN201410274304 A CN 201410274304A CN 104049813 B CN104049813 B CN 104049813B
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Abstract
The embodiment of the invention discloses a kind of processing method and processing device of interference signal, it is related to touch-screen field, the interference to reduce the signal that environmental disturbances signal is launched emission lamp.Concrete scheme is：Serial within a scan period to open transmitter unit, its any transmitter unit is opened to launch during useful signal, the first receiving unit for receiving useful signal corresponding with any transmitter unit is opened, to obtain sampled signal；Opening the first receiving unit, to obtain sampled signal simultaneously, the second receiving unit with the first N number of receiving unit in receiving unit interval is opened, to obtain the environmental disturbances signal of the second receiving unit collection, and the environmental disturbances signal of the second receiving unit collection of last stored is updated；By sampled signal and the environmental disturbances signal subtraction of the first receiving unit stored collection, the environmental disturbances signal included in the sampled signal to filter the first receiving unit.The embodiment of the present invention is used in the data acquisition of touch-screen equipment.
Description
Technical field
The present invention relates to touch-screen field, more particularly to a kind of processing method and processing device of interference signal.
Background technology
In recent years, infrared touch panel is so that its is simple in construction, not by electric current, voltage and electrostatic interference, with high stability, height
Resolution ratio and it is easy for installation the advantages of, the main product as touch-screen market.Infrared touch panel is by installed in screen periphery
The circuit board arranged on housing, housing and the infrared signal emission lamp on circuit board transverse and longitudinal direction and IR signal reception lamp structure
Into.Wherein, infrared signal emission lamp and IR signal reception lamp are corresponded, and infrared signal emission lamp launches infrared letter
Number, the infrared signal net that transverse and longitudinal is intersected is constituted on circuit boards.When a certain position of touch body touch touch-screen, touch body and block
By the infrared signal in the transverse and longitudinal direction of the position so that the IR signal reception lamp of correspondence position can not receive infrared letter
Number.By detecting whether IR signal reception lamp receives infrared signal, it may be determined that go out the position of touch point.
However, include infrared signal composition in ambient light signal, it is red in ambient light signal particularly when sunlight irradiates
External signal composition is higher, as shown in figure 1, when touching body touch touch-screen, touching body and although having blocked infrared signal emission lamp
The infrared signal in the transverse and longitudinal direction for the process position launched, but infrared signal in ambient light signal is to exist in real time and angle
Spend at random so that ambient light can still be received by being blocked the corresponding IR signal reception lamp of infrared signal emission lamp of part
Infrared signal in signal.Now, although the infrared signal of infrared discharge lamps transmitting is blocked by touch body, but corresponding infrared
Signal reception lamp receives the infrared signal in ambient light signal, when whether the reception lamp of detection infrared signal receives infrared letter
Number when, will be considered that the IR signal reception lamp receives the infrared signal of correspondence infrared signal emission lamp transmitting, and judge red
The infrared signal of outer emission lamp transmitting is not blocked by touch body, and the interference of the infrared signal in this ambient light signal can be caused
The erroneous judgement of touch point information.
In the prior art, for the infrared signal in filtering environmental optical signal, the infrared signal in reduction ambient light signal
The interference for the infrared signal launched infrared discharge lamps, proposes a kind of hardware antinoise signal interference method.Hardware antinoise signal disturber
Method is mainly disturbed by the design of touch-screen hardware circuit come filtering environmental signal.Concrete principle is by hardware circuit control
The frequency of the infrared signal of infrared signal emission lamp transmitting, then filters out the infrared letter in ambient light signal by filter circuit
Number launch the different signal of frequency of infrared signal from infrared discharge lamps.But in this approach, if in ambient light signal
When infrared signal and the same or like frequency that infrared discharge lamps launch infrared signal, by filter circuit it is difficult to filter out environment
Infrared signal in optical signal, therefore after being handled by filter circuit, infrared discharge lamps transmitting infrared signal still can be by ring
The interference of infrared signal in the optical signal of border.
The content of the invention
Embodiments of the invention provide a kind of processing method and processing device of interference signal, to solve to exist in the prior art
Can not filter or be difficult filtering environmental optical signal in infrared signal the problem of, can reduce infrared in ambient light signal
The interference for the infrared signal that signal is launched infrared discharge lamps.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
The first aspect of the embodiment of the present invention there is provided a kind of processing method of interference signal, including：
Serial within a scan period to open transmitter unit, its any transmitter unit is opened to launch during useful signal,
The first receiving unit for receiving the useful signal corresponding with any transmitter unit is opened, to obtain sampled signal, its
In, the sampled signal is included in the environmental disturbances signal of the first receiving unit periphery；
First receiving unit is being opened, to obtain the sampled signal simultaneously, is being opened and first receiving unit
The second receiving unit of N number of receiving unit is spaced, outside second receiving unit to obtain the second receiving unit collection
The environmental disturbances signal enclosed, and the environmental disturbances signal of second receiving unit collection of last stored is updated, N is nature
Number；
By the sampled signal and the environmental disturbances signal subtraction of first receiving unit stored collection, to filter
The environmental disturbances signal included in the sampled signal of first receiving unit.
With reference in a first aspect, in a kind of possible implementation, second reception for updating last stored is single
The environmental disturbances signal of member collection, including：
According to second receiving unit gather second receiving unit periphery environmental disturbances signal and it is described on
The rate of change of environmental disturbances signal described in the environmental disturbances signal of change of second receiving unit collection of secondary storage；
If the rate of change of the environmental disturbances signal is more than default rate of change threshold value, adopted using second receiving unit
The environmental disturbances signal of second receiving unit periphery of collection replaces second receiving unit collection of the last stored
Environmental disturbances signal.
With reference to first aspect and above-mentioned possible implementation, in alternatively possible implementation, the interference signal
Processing method also include：
The collection period of the environmental disturbances signal is adjusted according to the rate of change of the environmental disturbances signal；
It is described to open first receiving unit, to obtain the sampled signal simultaneously, open and received with described first
Second receiving unit of the N number of receiving unit of unit interval, receives single with obtain the second receiving unit collection described second
The environmental disturbances signal of first periphery, including：
First receiving unit is being opened, to obtain the sampled signal simultaneously, if the collection period is reached, is being opened
The second receiving unit is opened, is believed with obtaining the environmental disturbances of second receiving unit periphery of the second receiving unit collection
Number.
With reference to first aspect and above-mentioned possible implementation, in alternatively possible implementation, described second connects
Receive unit and include K reception lamp, K >=1, K is natural number；
M reception lamp is separated between second receiving unit and first receiving unit, M=N × K, M is nature
Number；
Wherein, M for touch-screen first direction while it is upper receive lamp number with second direction while on reception lamp number
/ 2nd of sum.
With reference to first aspect and above-mentioned possible implementation, in alternatively possible implementation,
As K ＞ 1, the environmental disturbances signal of the second receiving unit periphery is the jth in second receiving unit
The individual sampled signal for receiving lamp, 1≤j≤K；Or, the sampled signal of second receiving unit is second receiving unit
In all reception lamps sampled signal average value.
The second aspect of the embodiment of the present invention, also provides a kind of processing unit of interference signal, including：
Sampling unit, opens transmitter unit, its any transmitter unit is opened to send out for serial within a scan period
When penetrating useful signal, the first receiving unit for receiving the useful signal corresponding with any transmitter unit is opened, to obtain
Sampled signal is taken, wherein, the sampled signal is included in the environmental disturbances signal of the first receiving unit periphery；
Acquiring unit, it is same to obtain the sampled signal for opening first receiving unit in the sampling unit
When, the second receiving unit with the N number of receiving unit in the first receiving unit interval is opened, to obtain second receiving unit
The environmental disturbances signal of second receiving unit periphery of collection；
Updating block, for after the environmental disturbances signal that acquiring unit obtains the second receiving unit periphery, updating
The environmental disturbances signal of second receiving unit collection of last stored, N is natural number；
Unit is filtered, it is single for the sampled signal for obtaining the sampling unit and first reception stored
The environmental disturbances letter included in the environmental disturbances signal subtraction of member collection, the sampled signal to filter first receiving unit
Number.
With reference to second aspect, in a kind of possible implementation, the updating block, including：
Computing module, second reception that second receiving unit for being obtained according to the acquiring unit is gathered
The environmental disturbances signal of unit periphery and the environmental disturbances signal of change of second receiving unit collection of the last stored
The rate of change of the environmental disturbances signal；
Update module, if being more than for the rate of change that the computing module calculates the obtained environmental disturbances signal default
Rate of change threshold value, the then environmental disturbances signal of second receiving unit periphery gathered using second receiving unit is replaced
The environmental disturbances signal of second receiving unit collection of the last stored.
With reference to second aspect and above-mentioned possible implementation, in alternatively possible implementation, interference signal
Processing unit also includes：
Adjustment unit, the rate of change for calculating the obtained environmental disturbances signal according to the updating block adjusts institute
State the collection period of environmental disturbances signal；
The acquiring unit, is additionally operable to open first receiving unit in the collecting unit, to obtain the sampling
Signal simultaneously, if the collection period after adjustment unit adjustment is reached, opens second receiving unit, to obtain
The environmental disturbances signal of the second receiving unit periphery.
With reference to second aspect and above-mentioned possible implementation, in alternatively possible implementation, described second connects
Receive unit and include K reception lamp, K >=1, K is natural number；
M reception lamp is separated between second receiving unit and first receiving unit, M=N × K, M is nature
Number；
Wherein, M for touch-screen first direction while it is upper receive lamp number with second direction while on reception lamp number
/ 2nd of sum.
With reference to second aspect and above-mentioned possible implementation, in alternatively possible implementation,
As K ＞ 1, the environmental disturbances signal of the second receiving unit periphery is the jth in second receiving unit
The individual sampled signal for receiving lamp, 1≤j≤K；Or, the sampled signal of second receiving unit is second receiving unit
In all reception lamps sampled signal average value.
The processing method and processing device of interference signal provided in an embodiment of the present invention, with that can not filter in the prior art or very
Infrared signal in difficult filtering environmental optical signal is compared, during the serial scan of this programme, and each can be opened successively
Transmitter unit, when a transmitter unit is in opening, other transmitter units are in closed mode；Therefore, first connect
Receive unit (receiving unit of the corresponding useful signal for receiving transmitter unit transmitting of the transmitter unit in opening)
Sampled signal includes the environmental disturbances signal and useful signal of the first receiving unit periphery, or the peripheral ring of the first receiving unit
Border interference signal；And for for the second receiving unit of the first N number of receiving unit in receiving unit interval, because its is corresponding
Transmitter unit is closed, and is separated between the first receiving unit N number of receiving unit, therefore can not collect its correspondence
Transmitter unit transmitting useful signal, and effective letter of the first receiving unit corresponding transmitter unit transmitting can not be collected
Number, it is merely able to collect the environmental disturbances signal of the second receiving unit periphery.Therefore in this programme, first can be obtained simultaneously and is connect
The sampled signal of unit and the peripheral environmental disturbances signal of the second receiving unit are received, and stores the peripheral of the second receiving unit
Environmental disturbances signal, for that when serially opening the corresponding transmitter unit of the second receiving unit to launch useful signal, can adopt
With the environmental disturbances signal in the sampled signal of the receiving unit of environmental disturbances target signal filter second of storage；And use what is stored
The environmental disturbances signal included in the sampled signal of the receiving unit of environmental disturbances target signal filter first of first receiving unit collection,
The interference for the infrared signal that the infrared signal in ambient light signal is launched infrared discharge lamps can be reduced.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Judge schematic diagram by accident in touch point under a kind of ambient light signal interference that Fig. 1 provides for background of invention；
Fig. 2 is infrared touch-screen equipment schematic diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of process flow figure of interference signal provided in an embodiment of the present invention；
Fig. 4 is infrared touch-screen equipment transmitter unit transmission signal schematic diagram provided in an embodiment of the present invention；
A kind of process flow figure for interference signal that Fig. 5 provides for another embodiment of the present invention；
Fig. 6 provides a kind of structural representation of the processing unit of interference signal for another embodiment of the present invention；
The structural representation of the processing unit for another interference signal that Fig. 7 provides for another embodiment of the present invention；
The structural representation of the processing unit for another interference signal that Fig. 8 provides for another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
In addition, the terms " system " and " network " are often used interchangeably herein.The terms " and/
Or ", only a kind of incidence relation for describing affiliated partner, represents there may be three kinds of relations, for example, A and/or B, can be with table
Show：Individualism A, while there is A and B, these three situations of individualism B.In addition, character "/" herein, before and after typicallying represent
Affiliated partner is a kind of relation of "or".
The processing method of interference signal provided in an embodiment of the present invention, can apply to the signal acquisition process of touch-screen equipment
In, wherein, signal transmitting side is included on the touch-screen of touch-screen equipment and signal receives side.Signal is launched and signal receives side and is pair
Answer.It can be infrared touch-screen equipment or other touch-screen equipments that this, which touches equipment, and the present invention is not limited touch-screen equipment
System.
If touch-screen equipment is infrared touch-screen equipment, as shown in Fig. 2 signal transmitting side refers to infrared emission side, signal is received
When referring to infrared receiver.Infrared signal emission lamp is arranged with infrared emission side, infrared receiver is arranged with infrared signal on side
Receive lamp, infrared signal emission lamp and IR signal reception lamp are one-to-one, and an infrared signal emission lamp is in opening
It is used to launch the infrared signal (embodiment of the present invention to IR signal reception lamp corresponding with the infrared signal emission lamp when opening state
In useful signal), the infrared signal emission lamp in opening is represented in Fig. 2 with stain.
In actual applications, on the touch-screen of infrared touch-screen equipment infrared signal emission lamp and IR signal reception lamp
Number is determined according to the size of the touch-screen of infrared touch-screen equipment.
The embodiment of the present invention provides a kind of processing method of interference signal, as shown in figure 3, this method can include：
S101, the serial unlatching transmitter unit within a scan period, its any transmitter unit are opened to launch effective letter
Number when, open the first receiving unit of reception useful signal corresponding with any transmitter unit, to obtain sampled signal, its
In, sampled signal is included in the environmental disturbances signal of the first receiving unit periphery.
Wherein, transmitter unit can be the emission lamp in the signal transmitting side on the touch-screen of touch-screen equipment, receiving unit
Can for touch-screen equipment touch-screen on signal receive side on reception lamp, the first receiving unit be with opening
Emission lamp (emission lamp having been switched on) corresponding receiving unit.
Wherein, when the useful signal in the embodiment of the present invention refers to open any transmitter unit, transmitter unit transmitting
Signal.For example, when touch-screen equipment is infrared touch-screen equipment, useful signal is the infrared signal that infrared signal emission lamp is launched.
Certain touch-screen equipment includes but is not limited to infrared touch-screen equipment, and corresponding useful signal is also not necessarily limited to the transmitting of infrared signal emission lamp
Infrared signal.
The present invention implement in environmental disturbances signal can be ambient light in can to useful signal produce interference signal,
Such as approached or identical ambient light composition with useful signal frequency.For example, when touch-screen equipment is infrared touch-screen equipment, environment
Interference signal is the infrared light in ambient light.Certain touch-screen equipment includes but is not limited to infrared touch-screen equipment, and corresponding environment is done
Disturb the infrared light that signal is also not necessarily limited in ambient light.
Sampled signal in the embodiment of the present invention is opens during the first receiving unit, the letter that the first receiving unit is collected
Number.Wherein, because transmitter unit corresponding with the first receiving unit is in opening, and ambient light exists at any time,
Therefore the signal (i.e. sampled signal) that the first receiving unit is collected can include：The environmental disturbances letter of first receiving unit periphery
Number and be received from the useful signal of corresponding with the first receiving unit transmitter unit transmitting；Or first receiving unit collect
Signal (i.e. sampled signal) can include：The environmental disturbances signal of first receiving unit periphery.
Exemplary, touched when existing on body contact touch-screen, it is with the first receiving unit and corresponding with the first receiving unit
Transmitter unit formed scanning optical path correspondence position when, the first receiving unit and transmitting corresponding with the first receiving unit are single
The scanning optical path that member is formed can then be blocked by touch body, and now, the first receiving unit can not be received and the first receiving unit
The useful signal of corresponding transmitter unit transmitting, the then signal (i.e. sampled signal) that the first receiving unit is collected can include：
The environmental disturbances signal of first receiving unit periphery.
When on no touch body contact touch-screen, with the first receiving unit and transmitter unit corresponding with the first receiving unit
During the scanning optical path correspondence position formed, what the first receiving unit and transmitter unit corresponding with the first receiving unit were formed
Scanning optical path will not then be blocked by touch body, now, and the first receiving unit can receive hair corresponding with the first receiving unit
The useful signal of unit transmitting is penetrated, then the signal (i.e. sampled signal) that the first receiving unit is collected can include：First receives
The environmental disturbances signal of unit periphery and the useful signal for being received from transmitter unit transmitting corresponding with the first receiving unit.
A scan period in the embodiment of the present invention can scan touch-screen equipment successively for the processing unit of interference signal
Touch-screen on all reception lamps and the time cycle used by the scanning optical path that is formed of emission lamp corresponding with the reception lamp.
S102, open the first receiving unit, to obtain sampled signal simultaneously, open it is N number of with the first receiving unit interval
Second receiving unit of receiving unit, is believed with obtaining the environmental disturbances of the second receiving unit periphery of the second receiving unit collection
Number, and the environmental disturbances signal of the second receiving unit collection of last stored is updated, N is natural number.
Wherein, the second receiving unit can include a reception lamp, can also include K reception lamp, K is natural number.
Explanation is needed, in embodiments of the present invention, N value can be configured according to the angle of radiation of useful signal,
When the second receiving unit and the N number of receiving unit in the first receiving unit interval, the second receiving unit can not be collected and first
The useful signal of the corresponding transmitter unit transmitting of receiving unit, i.e., as shown in figure 4, the second receiving unit can be to be received first
Signal residing for unit is received on (while such as long), the radiation determined according to the position of the first receiving unit on the touchscreen
Receiving unit outside scope.Certainly, the second receiving unit can be to receive side not with the signal residing for the first receiving unit
Other same signals are received on side (such as short side), the reception list determined according to the position of the first receiving unit on the touchscreen
Member, the embodiment of the present invention is not limited.
In the embodiment of the present invention while sampled signal of the first receiving unit is obtained, parallel obtain receives single with first
The environmental disturbances signal of the second receiving unit periphery of the second receiving unit collection of the N number of receiving unit in member interval can ensure：
The environmental disturbances signal of the second receiving unit periphery of the second receiving unit collection got is not to be mingled with to receive single with first
The useful signal of the corresponding transmitter unit transmitting of member.
Wherein, if as shown in figure 4, in the embodiment of the present invention obtain the first receiving unit sampled signal while, and
Row obtains the receiving unit periphery that receiving unit (such as receiving unit 1 and receiving unit 2 in Fig. 4) is gathered in radiation scope
Environmental disturbances signal, and during using collecting as the environmental disturbances signal of receiving unit periphery, because this can be in difference
Effective letter of transmitter unit (transmitter unit for being in opening) transmitting corresponding with the first receiving unit is received in degree
Number, then it is mingled with and the first receiving unit in the peripheral environmental disturbances signal that may result in receiving unit 1 or receiving unit 2
The useful signal of corresponding transmitter unit transmitting, then when can reduce follow-up progress signal transacting, the accuracy rate of signal transacting.
Optionally, the interval of the second receiving unit and the first receiving unit can also be more than N number of receiving unit.For example, the
N+A, the interval receiving unit of two receiving units and the first receiving unit, A is the integer more than 0.
It should be noted that the embodiment of the present invention is serial scan, and within a scan period, each receiving unit
Sampled signal will be collected, each receiving unit (including the first receiving unit and second receiving unit) can collect outer
The environmental disturbances signal enclosed.Second receiving unit is collected after the environmental disturbances signal of the second receiving unit periphery, can basis
The environmental disturbances signal for needing the second receiving unit for updating last stored to gather.
Further, updating the method for the environmental disturbances signal of the second receiving unit collection of last stored can be：Root
The peripheral environmental disturbances signal and the environmental disturbances of the second receiving unit collection of last stored gathered according to the second receiving unit
The rate of change of signal of change environmental disturbances signal, if the rate of change of environmental disturbances signal is more than default rate of change threshold value, is used
The environmental disturbances signal for stating the second receiving unit periphery of the second receiving unit collection replaces the second receiving unit of last stored
The environmental disturbances signal of collection.More detailed process may be referred to other embodiments of the invention.
S103, by sampled signal and the environmental disturbances signal subtraction of the first receiving unit stored collection, to filter the
The environmental disturbances signal included in the sampled signal of one receiving unit.
Wherein, sampled signal may be included in the environmental disturbances signal of the first receiving unit periphery, it is also possible to including effective
Signal and the environmental disturbances signal of the first receiving unit periphery, by sampled signal and the ring of the first receiving unit stored collection
Border interference signal is subtracted each other, and can reduce the useful signal that environmental disturbances signal is launched transmitter unit with filtering environmental interference signal
Interference.
The processing method of interference signal provided in an embodiment of the present invention, with that can not filter in the prior art or be difficult to filter
Infrared signal in ambient light signal is compared, during the serial scan of this programme, each transmitting can be opened successively single
Member, when a transmitter unit is in opening, other transmitter units are in closed mode；Therefore, the first receiving unit
The sampling letter of (receiving unit of the corresponding useful signal for receiving transmitter unit transmitting of the transmitter unit in opening)
Number include the first receiving unit periphery environmental disturbances signal and useful signal, or the first receiving unit periphery environmental disturbances
Signal；And for for the second receiving unit of the first N number of receiving unit in receiving unit interval, launching single because its is corresponding
Member is closed, and is separated between the first receiving unit N number of receiving unit, therefore can not collect its corresponding transmitting
The useful signal of unit transmitting, and the useful signal of the corresponding transmitter unit transmitting of the first receiving unit can not be collected, only
The environmental disturbances signal of the second receiving unit periphery can be collected.Therefore in this programme, the first reception list can be obtained simultaneously
The sampled signal of member and the peripheral environmental disturbances signal of the second receiving unit, and store the peripheral environment of the second receiving unit
Interference signal, for that when serially opening the corresponding transmitter unit of the second receiving unit to launch useful signal, can use and deposit
Environmental disturbances signal in the sampled signal of the receiving unit of environmental disturbances target signal filter second of storage；And using first stored
The environmental disturbances signal that includes in the sampled signal of the receiving unit of environmental disturbances target signal filter first of receiving unit collection, can be with
The interference for the infrared signal that infrared signal in reduction ambient light signal is launched infrared discharge lamps.
Another embodiment of the present invention provides a kind of processing method of interference signal, as shown in figure 5, this method can include：
S201, within a scan period, the processing unit of interference signal serially opens transmitter unit, and its any transmitting is single
Member opens to launch during useful signal, the first receiving unit for receiving useful signal corresponding with the transmitter unit is opened, to obtain
Take sampled signal.
Wherein, sampled signal may be included in the environmental disturbances signal of the first receiving unit periphery, it is also possible to including effective
Signal and the environmental disturbances signal of the first receiving unit periphery.
If it should be noted that the current scan period is first scan period, needing in first scan period
The environmental disturbances signal of periphery is gathered before progress, i.e., the environmental disturbances signal of periphery is gathered before S201, and stores each
The peripheral environmental disturbances signal that individual receiving unit is collected.Specific acquisition method can open each reception successively
Unit, to gather the environmental disturbances signal of periphery；Multiple receiving units can also be opened simultaneously, to gather the environmental disturbances of periphery
Signal；All receiving units can also be opened simultaneously, to gather the environmental disturbances signal of periphery.The embodiment of the present invention is to
The method for the environmental disturbances signal for gathering periphery before one scan period progress is not limited.
S202, the processing unit of interference signal are opening the first receiving unit, to obtain sampled signal simultaneously, if collection week
Phase reaches, and the second receiving unit that N number of receiving unit is at least spaced with the first receiving unit is opened, to obtain the second receiving unit
The environmental disturbances signal of the second receiving unit periphery of collection.
Wherein, collection period refers to that a receiving unit (the first receiving unit or the second receiving unit) gathers this twice
The environmental disturbances signal institute interlude cycle of receiving unit periphery.
It should be noted that the collection period that receiving unit gathers the environmental disturbances signal of receiving unit periphery can be
The time cycle prestored in touch-screen equipment.Certainly, the processing unit of interference signal can also subsequently be obtained according to calculating
The collection period that the rate of change adjustment of environmental disturbances signal prestores.Wherein, the processing unit of interference signal is believed according to environmental disturbances
Number the method for collection period that prestores of rate of change adjustment may be referred to the follow-up associated description of the embodiment of the present invention, the present embodiment
Here repeat no more.
It should be noted that N is any one natural number, N includes 0.Specific N value can be according to the spoke of useful signal
Firing angle degree is configured.When the angle of radiation of useful signal is 0, N could be arranged to 0.
Optionally, the second receiving unit can be comprising K reception lamp, and K >=1, K is natural number.Second receiving unit and
M reception lamp, when the second receiving unit and the N number of receiving unit in the first receiving unit interval, M are separated between one receiving unit
=N × K, M are natural number.
Wherein, as K ＞ 1, the environmental disturbances signal of the second receiving unit periphery can be the jth in the second receiving unit
The individual sampled signal for receiving lamp, 1≤j≤K, the sampled signal of the second receiving unit can also be all in the second receiving unit
Receive the average value of the sampled signal of lamp, the sampled signal of the second receiving unit can also be in the second receiving unit certain is several
The average value of the sampled signal of lamp is received, the embodiment of the present invention is not limited to this.
It is preferred that, M for touch-screen equipment first direction while it is upper receive lamp number with second direction while on reception lamp
/ 2nd of number sum.So, in a scan period, the receiving unit of head and the tail first and the second receiving unit of scanning it
Between keep certain interval, effectively corresponding with the first receiving unit transmitter unit of control is produced to the second receiving unit and disturbed
Possibility.Wherein, first direction while can be touch-screen equipment it is long while, second direction side is the short side of touch-screen equipment；First
Direction side can also be the short side of touch-screen equipment, second direction while be touch-screen equipment it is long while.
It should be noted that having certain angle of radiation in view of transmitter unit transmission signal, in the first receiving unit correspondence
Transmitter unit transmitting signal the second receiving unit is not interfered in the case of, if the first receiving unit is set positioned at touch screen
Standby long side, the second receiving unit can be located at the short side of touch-screen equipment, and meet the second receiving unit and the first receiving unit
At least it is spaced N number of receiving unit；If the first receiving unit is located at the short side of touch-screen equipment, the second receiving unit can be located at touch screen
The long side of equipment, and the second receiving unit of satisfaction and the first receiving unit are at least spaced N number of receiving unit.
Wherein, the environmental disturbances signal of the second receiving unit periphery of the second receiving unit collection is used to open the serial
The corresponding transmitter unit of two receiving units is to launch during useful signal, and the environment filtered in the sampled signal of the second receiving unit is done
Disturb signal.
The environment for the second receiving unit periphery that S203, the processing unit of interference signal are gathered according to the second receiving unit is done
Disturb the rate of change of the environmental disturbances signal of change environmental disturbances signal of the second receiving unit collection of signal and last stored.
Wherein, the rate of change of environmental disturbances signal is believed for characterizing the previous environmental disturbances of working as of the second receiving unit collection
Number and last stored the second receiving unit gather environmental disturbances signal situation of change.Environmental disturbances change rate signal is larger
Represent the collection of the second receiving unit works as previous environmental disturbances signal compared to the ring that the second receiving unit of last stored is gathered
Border interference signal difference is larger, and the environmental disturbances signal intensity of corresponding second receiving unit periphery is larger；Environmental disturbances signal
The smaller previous environmental disturbances signal of working as representing the collection of the second receiving unit of rate of change receives single compared to the second of last stored
Less, the environmental disturbances signal intensity of corresponding second receiving unit periphery is little for the environmental disturbances signal difference of member collection.Its
In, the environmental disturbances signal of the second receiving unit collection of last stored is the previous secondary environment when previous environmental disturbances signal
Interference signal.
The method of the rate of change of specific computing environment interference signal can include：Calculate working as the second receiving unit collection
The difference of previous environmental disturbances signal and the environmental disturbances signal of the second receiving unit of last stored collection, then with obtaining
Difference divided by last stored the second receiving unit collection environmental disturbances signal.The rate of change of computing environment interference signal
Method can also include：Calculate the second receiving unit collection when previous environmental disturbances signal and last stored second reception
The difference of the environmental disturbances signal of unit collection.The rate of change of other method computing environment interference signal can certainly be used,
The embodiment of the present invention is not limited to this.
For example, the previous environmental disturbances signal of working as of the second receiving unit collection is V2, the second of last stored receives single
The environmental disturbances signal of member collection is V1, and the rate of change of environmental disturbances signal is represented with P, then P=(| V2-V1 |)/V1 or P=
|V2-V1|。
If the rate of change of S204, environmental disturbances signal is more than default rate of change threshold value, the processing unit of interference signal is then adopted
The environmental disturbances signal of the second receiving unit periphery gathered with the second receiving unit replaces the second receiving unit of last stored
The environmental disturbances signal of collection.
Further, when the rate of change of environmental disturbances signal is less than or equal to default rate of change threshold value, then last time is not replaced
The environmental disturbances signal of the second receiving unit collection of storage.
Wherein, if default rate of change threshold value is P0If, P>P0, then it represents that what the second receiving unit was gathered works as previous environment
Interference signal is larger compared to the environmental disturbances signal difference that the second receiving unit of last stored is gathered, and corresponding second receives single
The environmental disturbances signal intensity of first periphery is larger.If the environmental disturbances still gathered using the second receiving unit of last stored
Signal, may be larger with actual environmental disturbances deviation of signal, influences the accuracy of subsequent process.Therefore, if environmental disturbances are believed
Number rate of change be more than default rate of change threshold value, it is necessary to the environment of the second receiving unit periphery gathered using the second receiving unit
Interference signal replaces the environmental disturbances signal of the second receiving unit collection of last stored.If P≤P0, then it represents that second receives single
The previous environmental disturbances signal of working as of member collection compares the environmental disturbances signal difference that the second receiving unit of last stored is gathered
Less, less, the second receiving unit of last stored is gathered the environmental disturbances signal intensity of corresponding second receiving unit periphery
Environmental disturbances signal and actual environmental disturbances deviation of signal less, do not interfere with the accuracy of subsequent process.Therefore, if ring
The rate of change of border interference signal is less than default rate of change threshold value, it is not necessary to replace the ring of the second receiving unit collection of last stored
Border interference signal.
Further, the lower and upper limit of the rate of change threshold value of environmental disturbances signal can be pre-set, for example, setting ring
The lower limit of the rate of change threshold value of border interference signal is P1, the upper limit for setting the rate of change threshold value of environmental disturbances signal is P2, then P1≤
P0≤P2。
If it should be noted that outside the second receiving unit that the processing unit of interference signal is gathered according to the second receiving unit
The environmental disturbances that the environmental disturbances signal and the environmental disturbances signal of change of the second receiving unit collection of last stored enclosed is obtained
The rate of change of signal is less than P1If then the processing unit of interference signal can determine collection week currently stored in touch-screen equipment
Phase (receiving unit gathers the environmental disturbances signal institute interlude cycle of receiving unit periphery twice) interval acquiring
The environmental disturbances signal of receiving unit collection, then one accessed before and after one collection period of the processing unit of interference signal
The environmental disturbances signal intensity gathered twice of receiving unit will not be very big, shows that the actual environment of receiving unit periphery is done
The change for disturbing signal is little；Therefore the processing unit of interference signal then so need not frequently obtain the collection of receiving unit
Environmental disturbances signal (while e.g., obtaining the sampled signal of the first receiving unit every time, all obtains the collection of the second receiving unit
Environmental disturbances signal), then the processing unit of interference signal can adjust collection period, be larger than the currency of collection period.
If the environmental disturbances for the second receiving unit periphery that the processing unit of interference signal is gathered according to the second receiving unit
The rate of change for the environmental disturbances signal that signal and the environmental disturbances signal of change of the second receiving unit of last stored collection are obtained
More than P2If then the processing unit of interference signal can determine a currently stored collection period (reception in touch-screen equipment
Unit gathers the environmental disturbances signal institute interlude cycle of receiving unit periphery twice) collection of interval acquiring receiving unit
Environmental disturbances signal, then a receiving unit accessed before and after one collection period of the processing unit of interference signal two
The environmental disturbances signal intensity of secondary collection can be than larger, the change of actual environmental disturbances signal that may be peripheral with the receiving unit
Change situation is not inconsistent；Therefore the processing unit of interference signal then needs to adjust collection period, the currency for making it be less than collection period,
In order to which newest environmental disturbances signal can be got as far as possible.
If the environmental disturbances for the second receiving unit periphery that the processing unit of interference signal is gathered according to the second receiving unit
The rate of change for the environmental disturbances signal that signal and the environmental disturbances signal of change of the second receiving unit of last stored collection are obtained
More than or equal to P1And less than or equal to P2If then the processing unit of interference signal can determine currently stored in touch-screen equipment adopt
Collection cycle (receiving unit gathers the environmental disturbances signal institute interlude cycle of receiving unit periphery twice) interval
Obtain the environmental disturbances signal of receiving unit collection, then it is accessed before and after one collection period of the processing unit of interference signal
The environmental disturbances signal intensity gathered twice of one receiving unit and the actual environmental disturbances signal of receiving unit periphery
Situation of change be consistent；Therefore the processing unit of interference signal need not adjust collection period.
Exemplary, if the collection period of current environment interference signal is T0, if P<P1, then adopting environmental disturbances signal
Integrate period modulation as T0+t；If P>P2, then the collection period of environmental disturbances signal is adjusted to T0-t；If P1≤P≤P2, then protect
The collection period of held in ring border interference signal is T0.Wherein, t is that the collection for being used for adjusting environment interference signal pre-set is all
The step-length of phase.
The environmental disturbances that S205, the processing unit of interference signal gather sampled signal and the first receiving unit stored
The environmental disturbances signal included in signal subtraction, the sampled signal to filter the first receiving unit.
Wherein, sampled signal may be included in the environmental disturbances signal of the first receiving unit periphery, it is also possible to including effective
Signal and the environmental disturbances signal of the first receiving unit periphery, by sampled signal and the ring of the first receiving unit stored collection
Border interference signal is subtracted each other, and can reduce the useful signal that environmental disturbances signal is launched transmitter unit with filtering environmental interference signal
Interference.
The processing method of interference signal provided in an embodiment of the present invention, with that can not filter in the prior art or be difficult to filter
Infrared signal in ambient light signal is compared, during the serial scan of this programme, each transmitting can be opened successively single
Member, when a transmitter unit is in opening, other transmitter units are in closed mode；Therefore, the first receiving unit
The sampling letter of (receiving unit of the corresponding useful signal for receiving transmitter unit transmitting of the transmitter unit in opening)
Number include the first receiving unit periphery environmental disturbances signal and useful signal, or the first receiving unit periphery environmental disturbances
Signal；And for for the second receiving unit of the first N number of receiving unit in receiving unit interval, launching single because its is corresponding
Member is closed, and is separated between the first receiving unit N number of receiving unit, therefore can not collect its corresponding transmitting
The useful signal of unit transmitting, and the useful signal of the corresponding transmitter unit transmitting of the first receiving unit can not be collected, only
The environmental disturbances signal of the second receiving unit periphery can be collected.Therefore in this programme, the first reception list can be obtained simultaneously
The sampled signal of member and the peripheral environmental disturbances signal of the second receiving unit, and store the peripheral environment of the second receiving unit
Interference signal, for that when serially opening the corresponding transmitter unit of the second receiving unit to launch useful signal, can use and deposit
Environmental disturbances signal in the sampled signal of the receiving unit of environmental disturbances target signal filter second of storage；And using first stored
The environmental disturbances signal that includes in the sampled signal of the receiving unit of environmental disturbances target signal filter first of receiving unit collection, can be with
The interference for the infrared signal that infrared signal in reduction ambient light signal is launched infrared discharge lamps.
Another embodiment of the present invention provides a kind of processing unit of interference signal, as shown in fig. 6, the device can include：
Sampling unit 31, acquiring unit 32, updating block 33 and filter unit 34.
Sampling unit 31, transmitter unit is opened for serial within a scan period, its any transmitter unit open with
When launching useful signal, the first receiving unit for receiving useful signal corresponding with any transmitter unit is opened, is adopted with obtaining
Sample signal, wherein, sampled signal is included in the environmental disturbances signal of the first receiving unit periphery.
Acquiring unit 32, for sampling unit 31 open the first receiving unit, to obtain sampled signal simultaneously, open with
Second receiving unit of the first N number of receiving unit in receiving unit interval, receives single to obtain the second of the collection of the second receiving unit
The environmental disturbances signal of first periphery.
Wherein, the second receiving unit includes K reception lamp, and K >=1, K is natural number.
M reception lamp is separated between second receiving unit and the first receiving unit, M=N × K, M is natural number.Wherein,
M for touch-screen first direction while it is upper receive lamp number with second direction while on reception lamp number sum two/
One.
Further, as K ＞ 1, the environmental disturbances signal of the second receiving unit periphery is the jth in the second receiving unit
The individual sampled signal for receiving lamp, 1≤j≤K；Or, the sampled signal of the second receiving unit is all in the second receiving unit
Receive the average value of the sampled signal of lamp.
Updating block 33, for after the environmental disturbances signal that acquiring unit 32 obtains the second receiving unit periphery, updating
The environmental disturbances signal of the second receiving unit collection of last stored, N is natural number.
Unit 34 is filtered, is gathered for the sampled signal for obtaining sampling unit 31 and the first receiving unit stored
The environmental disturbances signal included in environmental disturbances signal subtraction, the sampled signal to filter the first receiving unit.
Further, updating block 33, as shown in fig. 7, can specifically include：Computing module 331 and update module 332.
Outside computing module 331, the second receiving unit that the second receiving unit for being obtained according to acquiring unit 32 is gathered
The environmental disturbances signal of change environmental disturbances signal that the environmental disturbances signal and the second receiving unit of last stored enclosed is gathered
Rate of change；
Update module 332, if being more than default change for the rate of change that computing module 331 calculates obtained environmental disturbances signal
Rate threshold value, the then environmental disturbances signal of the second receiving unit periphery gathered using the second receiving unit replaces last stored
The environmental disturbances signal of second receiving unit collection.
Further, the processing unit of the interference signal, as shown in figure 8, adjustment unit 35 can also be included.
Adjustment unit 35, the rate of change adjustment environment for calculating obtained environmental disturbances signal according to updating block 33 is done
Disturb the collection period of signal.
Further, acquiring unit 32, are additionally operable to open the first receiving unit in collecting unit 31, to obtain sampled signal
Meanwhile, if the collection period after adjustment unit 35 is adjusted is reached, the second receiving unit is opened, to obtain outside the second receiving unit
The environmental disturbances signal enclosed.
It should be noted that in the processing unit of interference signal provided in an embodiment of the present invention part functional module it is specific
Description may be referred to the corresponding content in embodiment of the method, and the present embodiment is no longer described in detail here.
The processing unit of interference signal provided in an embodiment of the present invention, with that can not filter in the prior art or be difficult to filter
Infrared signal in ambient light signal is compared, during the serial scan of this programme, each transmitting can be opened successively single
Member, when a transmitter unit is in opening, other transmitter units are in closed mode；Therefore, the first receiving unit
The sampling letter of (receiving unit of the corresponding useful signal for receiving transmitter unit transmitting of the transmitter unit in opening)
Number include the first receiving unit periphery environmental disturbances signal and useful signal, or the first receiving unit periphery environmental disturbances
Signal；And for for the second receiving unit of the first N number of receiving unit in receiving unit interval, launching single because its is corresponding
Member is closed, and is separated between the first receiving unit N number of receiving unit, therefore can not collect its corresponding transmitting
The useful signal of unit transmitting, and the useful signal of the corresponding transmitter unit transmitting of the first receiving unit can not be collected, only
The environmental disturbances signal of the second receiving unit periphery can be collected.Therefore in this programme, the first reception list can be obtained simultaneously
The sampled signal of member and the peripheral environmental disturbances signal of the second receiving unit, and store the peripheral environment of the second receiving unit
Interference signal, for that when serially opening the corresponding transmitter unit of the second receiving unit to launch useful signal, can use and deposit
Environmental disturbances signal in the sampled signal of the receiving unit of environmental disturbances target signal filter second of storage；And using first stored
The environmental disturbances signal that includes in the sampled signal of the receiving unit of environmental disturbances target signal filter first of receiving unit collection, can be with
The interference for the infrared signal that infrared signal in reduction ambient light signal is launched infrared discharge lamps.
Through the above description of the embodiments, it is apparent to those skilled in the art that, for description
It is convenient and succinct, can as needed will be upper only with the division progress of above-mentioned each functional module for example, in practical application
State function distribution to be completed by different functional modules, i.e., the internal structure of device is divided into different functional modules, to complete
All or part of function described above.The specific work process of the system, apparatus, and unit of foregoing description, before may be referred to
The corresponding process in embodiment of the method is stated, be will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the module or
The division of unit, only a kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units
Or component can combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, institute
Display or the coupling each other discussed or direct-coupling or communication connection can be by some interfaces, device or unit
INDIRECT COUPLING or communication connection, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or used
When, it can be stored in a computer read/write memory medium.Understood based on such, technical scheme is substantially
The part contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are to cause a computer
Equipment (can be personal computer, server, or network equipment etc.) or processor (processor) perform the present invention each
The all or part of step of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD
Etc. it is various can be with the medium of store program codes.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of processing method of interference signal, it is characterised in that including：
Serial within a scan period to open transmitter unit, its any transmitter unit is opened to launch during useful signal, opens
The first receiving unit for receiving the useful signal corresponding with any transmitter unit, to obtain sampled signal, wherein, institute
State the environmental disturbances signal that sampled signal is included in the first receiving unit periphery；
First receiving unit is being opened, to obtain the sampled signal simultaneously, is being opened and the first receiving unit interval N
Second receiving unit of individual receiving unit, with the ring for second receiving unit periphery for obtaining the second receiving unit collection
Border interference signal, and the environmental disturbances signal of second receiving unit collection of last stored is updated, N is positive integer or 0；
By the sampled signal and the environmental disturbances signal subtraction of first receiving unit stored collection, described in filtering
The environmental disturbances signal included in the sampled signal of first receiving unit.
2. according to the method described in claim 1, it is characterised in that second receiving unit for updating last stored is adopted
The environmental disturbances signal of collection, including：
The environmental disturbances signal of second receiving unit periphery gathered according to second receiving unit and the last time deposit
The rate of change of environmental disturbances signal described in the environmental disturbances signal of change of second receiving unit collection of storage；
If the rate of change of the environmental disturbances signal is more than default rate of change threshold value, gathered using second receiving unit
The environmental disturbances signal of the second receiving unit periphery replaces the ring of second receiving unit collection of the last stored
Border interference signal.
3. method according to claim 2, it is characterised in that also include：
The collection period of the environmental disturbances signal is adjusted according to the rate of change of the environmental disturbances signal；
It is described to open first receiving unit, to obtain the sampled signal simultaneously, open and first receiving unit
The second receiving unit of N number of receiving unit is spaced, outside second receiving unit to obtain the second receiving unit collection
The environmental disturbances signal enclosed, including：
First receiving unit is being opened, to obtain the sampled signal simultaneously, if the collection period is reached, the is being opened
Two receiving units, with the environmental disturbances signal for second receiving unit periphery for obtaining the second receiving unit collection.
4. method according to claim 1 or 2, it is characterised in that second receiving unit receives lamp comprising K, K >=
1, K is natural number；
M reception lamp is separated between second receiving unit and first receiving unit, M to N × K, M is natural number；
Wherein, M for touch-screen first direction while it is upper receive lamp number with second direction while on reception lamp number sum
1/2nd.
5. method according to claim 4, it is characterised in that
As K ＞ 1, the environmental disturbances signal of the second receiving unit periphery connects for j-th in second receiving unit
Receive the sampled signal of lamp, 1≤j≤K；Or, the sampled signal of second receiving unit is in second receiving unit
The average value of all sampled signals for receiving lamp.
6. a kind of processing unit of interference signal, it is characterised in that including：
Sampling unit, opens transmitter unit, its any transmitter unit is opened to have launched for serial within a scan period
When imitating signal, the first receiving unit for receiving the useful signal corresponding with any transmitter unit is opened, is adopted with obtaining
Sample signal, wherein, the sampled signal is included in the environmental disturbances signal of the first receiving unit periphery；
Acquiring unit, for opening first receiving unit in the sampling unit, to obtain the sampled signal simultaneously, is opened
The second receiving unit with the N number of receiving unit in the first receiving unit interval is opened, is gathered with obtaining second receiving unit
Second receiving unit periphery environmental disturbances signal；
Updating block, for after the environmental disturbances signal that acquiring unit obtains the second receiving unit periphery, updating last time
The environmental disturbances signal of second receiving unit collection of storage, N is positive integer or 0；
Unit is filtered, first receiving unit for the sampled signal that obtains the sampling unit with having stored is adopted
The environmental disturbances signal included in the environmental disturbances signal subtraction of collection, the sampled signal to filter first receiving unit.
7. device according to claim 6, it is characterised in that the updating block, including：
Computing module, second receiving unit that second receiving unit for being obtained according to the acquiring unit is gathered
Described in the environmental disturbances signal of periphery and the environmental disturbances signal of change of second receiving unit collection of the last stored
The rate of change of environmental disturbances signal；
Update module, if being more than default change for the rate of change that the computing module calculates the obtained environmental disturbances signal
Rate threshold value, the then environmental disturbances signal of second receiving unit periphery gathered using second receiving unit replaces described
The environmental disturbances signal of second receiving unit collection of last stored.
8. device according to claim 7, it is characterised in that also include：
Adjustment unit, the rate of change for calculating the obtained environmental disturbances signal according to the updating block adjusts the ring
The collection period of border interference signal；
The acquiring unit, is additionally operable to open first receiving unit in the sampling unit, to obtain the sampled signal
Meanwhile, if the collection period after adjustment unit adjustment is reached, second receiving unit is opened, it is described to obtain
The environmental disturbances signal of second receiving unit periphery.
9. the device according to claim 6 or 7, it is characterised in that second receiving unit receives lamp comprising K, K >=
1, K is natural number；
M reception lamp is separated between second receiving unit and first receiving unit, and (M to N × K, M are natural number；
Wherein, M for touch-screen first direction while it is upper receive lamp number with second direction while on reception lamp number sum
1/2nd.
10. device according to claim 9, it is characterised in that
As K ＞ 1, the environmental disturbances signal of the second receiving unit periphery connects for j-th in second receiving unit
Receive the sampled signal of lamp, 1≤j≤K；Or, the sampled signal of second receiving unit is in second receiving unit
The average value of all sampled signals for receiving lamp.
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| CN201410274304.7A CN104049813B (en) | 2014-06-18 | 2014-06-18 | A kind of processing method and processing device of interference signal |
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| CN111865436B (en) * | 2020-07-29 | 2022-11-04 | 北京紫光微电子系统有限公司 | Method and system for removing power line interference and electronic equipment |
| CN116719440A (en) * | 2022-09-28 | 2023-09-08 | 广州众远智慧科技有限公司 | Infrared signal scanning method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103455213A (en) * | 2013-08-23 | 2013-12-18 | 广州视睿电子科技有限公司 | Light interference resistance method and circuit |
| CN103777821A (en) * | 2014-01-02 | 2014-05-07 | 青岛海信电器股份有限公司 | Anti-interference method and device for touch system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103455213A (en) * | 2013-08-23 | 2013-12-18 | 广州视睿电子科技有限公司 | Light interference resistance method and circuit |
| CN103777821A (en) * | 2014-01-02 | 2014-05-07 | 青岛海信电器股份有限公司 | Anti-interference method and device for touch system |
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