CN106371674B - The touch localization method and device of infrared touch panel - Google Patents
The touch localization method and device of infrared touch panel Download PDFInfo
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- CN106371674B CN106371674B CN201610817243.3A CN201610817243A CN106371674B CN 106371674 B CN106371674 B CN 106371674B CN 201610817243 A CN201610817243 A CN 201610817243A CN 106371674 B CN106371674 B CN 106371674B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- Position Input By Displaying (AREA)
Abstract
The disclosure discloses the touch localization method and device of a kind of infrared touch panel.The described method includes: infrared touch panel successively carries out in periodic infrared scanning according to each default scanning direction, according to the intensity value and preset boundary intensity limit value of infrared ray optical path adjacent under the default scanning direction, determine the analog quantity touch area under the default scanning direction, analog quantity touch area under each default scanning direction removes terrible point, and positions the touch point in the infrared touch panel.The touch localization method and device of above-mentioned infrared touch panel can be avoided appearance due to cause the infrared ray optical path to be unsatisfactory for binarization threshold the problems such as touching object is smaller or edge is unsmooth can not fixation and recognition touch point the problem of, improve the accuracy that positioning is touched in infrared touch panel.
Description
Technical field
This disclosure relates to infrared touch-control field, the in particular to touch localization method and device of a kind of infrared touch panel.
Background technique
Touch screen is a kind of induction type display device of receivable input signal, provides one kind for current electronic product
Simply, conveniently, natural subscriber computer exchange method.In various types of touch screens, infrared touch screen with environment due to adapting to
Property strong, longer life expectancy, can recognize and touch the advantages such as points are more and be widely used.
In infrared touch panel, detect whether infrared ray optical path is blocked by infrared scanning, and then determine infrared touch
Touch point in screen.The binaryzation information for being all based on infrared ray optical path is positioned currently, touch to infrared touch panel, i.e.,
Judge the size relation between infrared ray optical path intensity value and binarization threshold, and then positions the touch point in infrared touch panel.
However, when occur touch location it is smaller, touch physics edge it is unsmooth when, be based only on infrared ray optical path
Binaryzation information carry out infrared touch panel touch positioning just will appear positioning mistake problem, greatly reduce infrared ray
The accuracy of positioning is touched in touch screen.
For example, Fig. 1 is infrared ray optical path intensity value and binaryzation information schematic diagram when infrared touch panel touches.It is logical
It crosses setting binarization threshold to judge the intensity value of each infrared ray optical path, obtains the binaryzation letter of infrared ray optical path intensity value
Breath.When occur touch location it is smaller, touch physics edge it is unsmooth when, due to touch edge or small touch point etc. to red
The blocking degree of outside line optical path is simultaneously little, and correspondingly, the degree that the intensity value of infrared ray optical path reduces is also little, does not reach two
Value threshold value standard positions mistake so as to cause touching.
Therefore, the accuracy that positioning is touched in infrared touch panel is improved as current technical problem urgently to be resolved.
Summary of the invention
The lower technical problem of accuracy in order to solve to touch positioning in infrared touch panel in the related technology, the disclosure
Provide the touch localization method and device of a kind of infrared touch panel.
A kind of touch localization method of infrared touch panel, comprising:
Infrared touch panel successively carries out in periodic infrared scanning according to each default scanning direction, according to described pre-
If the intensity value of adjacent infrared ray optical path and preset boundary intensity limit value, determine under the default scanning direction under scanning direction
Analog quantity touch area；
Analog quantity touch area under each default scanning direction removes terrible point, and positions in the infrared touch panel
Touch point.
A kind of touch positioning device of infrared touch panel, comprising:
Touch area determining module is successively carried out according to each default scanning direction periodically red for infrared touch panel
In outside line scanning, according to the intensity value and preset boundary intensity limit value of infrared ray optical path adjacent under the default scanning direction,
Determine the analog quantity touch area under the default scanning direction；
Locating module removes terrible point for the analog quantity touch area under each default scanning direction, and described in positioning
Touch point in infrared touch panel.
The technical scheme provided by this disclosed embodiment can include the following benefits:
When carrying out touching positioning to the touch operation in infrared touch panel, successively swept according to each preset in infrared touch panel
It retouches direction to carry out in periodic infrared scanning, according to the intensity value of infrared ray optical path adjacent under default scanning direction and preset
Boundary intensity limit value be reference, the analog quantity touch area under each default scanning direction is determined, under each default scanning direction
Analog quantity touch area remove terrible point, and the touch point in infrared touch panel is positioned, by judging the strong of infrared ray optical path
Judged when angle value and the relationship of boundary intensity limit value in conjunction with the intensity value of adjacent infrared ray optical path, is avoided in touching object
The problems such as smaller or edge is unsmooth cause infrared ray optical path be unsatisfactory for binarization threshold and can not fixation and recognition touch point ask
Topic, improves the accuracy that positioning is touched in infrared touch panel.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
It is open.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is infrared ray optical path intensity value and binaryzation information schematic diagram when infrared touch panel touches；
Fig. 2 is a kind of flow chart of the touch localization method of infrared touch panel shown according to an exemplary embodiment；
Fig. 3 is a kind of structural schematic diagram of infrared touch panel shown according to an exemplary embodiment；
Fig. 4 is that the structure of long side infrared ray optical path under two different scanning directions shown according to an exemplary embodiment is shown
It is intended to；
Fig. 5 is infrared under one scanning direction when infrared touch panel shown according to an exemplary embodiment does not touch
The intensity value schematic diagram on linear light road；
Fig. 6 is infrared ray under one scanning direction when infrared touch panel shown according to an exemplary embodiment touches
The intensity value schematic diagram of optical path；
Fig. 7 is the intensity value according to infrared ray optical path adjacent under the default scanning direction shown in Fig. 1 corresponding embodiment,
It is with reference to the method flow diagram for determining the touch area step under the default scanning direction with preset boundary intensity limit value；
Fig. 8 is the signal on infrared ray roadside circle when infrared touch panel shown according to an exemplary embodiment touches
Figure；
Fig. 9 is the structural representation of default scanning direction lower die analog quantity touch area shown according to an exemplary embodiment
Figure；
Figure 10 is intensity value of the intensity value by infrared ray optical path shown in Fig. 7 corresponding embodiment to adjacent infrared ray optical path
It is compared respectively with preset boundary intensity limit value, is determined as the method flow diagram of the infrared ray optical path step on boundary；
Figure 11 is the schematic diagram shown according to an exemplary embodiment that beginning boundary is determined in infrared ray optical path；
Figure 12 is the schematic diagram shown according to an exemplary embodiment for determining in infrared ray optical path and terminating boundary；
Figure 13 is a kind of block diagram of the touch positioning device of infrared touch panel shown according to an exemplary embodiment；
Figure 14 is the block diagram of the touch area determining module shown in Figure 13 corresponding embodiment；
Figure 15 is the block diagram that boundary shown in Figure 14 corresponding embodiment determines submodule；
Figure 16 is the block diagram of the beginning boundary determination unit shown in Figure 15 corresponding embodiment；
Figure 17 is the block diagram of the termination boundary determination unit shown in Figure 15 corresponding embodiment.
Specific embodiment
Here will the description is performed on the exemplary embodiment in detail, the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Fig. 2 is a kind of flow chart of the touch localization method of infrared touch panel shown according to an exemplary embodiment.Such as
Shown in Fig. 2, the touch localization method of the infrared touch panel be may comprise steps of.
In step s 110, infrared touch panel successively carries out periodic infrared scanning according to each default scanning direction
In, according to the intensity value of infrared ray optical path adjacent under default scanning direction and preset boundary intensity limit value, determine default scanning
Analog quantity touch area under direction.
Periodic infrared scanning successively is carried out according to each default scanning direction in infrared touch panel, to perceive to red
Outer touch screen carries out the touch point of touch operation.
It should be understood that being correspondingly installed with emission lamp in infrared touch panel and receiving lamp, to be shone by emission lamp
With the reception for receiving lamp, light net is formed on infrared touch panel, and then perceives the touch point of touch operation in infrared touch panel.Tool
For body, Fig. 3 is a kind of structural schematic diagram of infrared touch panel shown according to an exemplary embodiment.As shown in figure 3, infrared
The appearance of touch screen is a rectangular configuration, is made of long side and short side.Long side includes a long side transmitting side 110 and one long
Receiving while 120, short side include a short side transmitting side 130 and one short receiving while 140.In long side transmitting side 110 and short
Several emission lamps are installed on edge emitting side 130, correspondence is installed in corresponding long receiving while 120 and short receiving while 140
Several reception lamps.It is set to form transmitting reception pair according to one-to-one mode by controlling these emission lamps and reception lamp, and
It is respectively turned on every a pair of of emission lamp in a certain order and receives lamp and carries out infrared scanning.By detecting every a pair of of transmitting
Whether lamp and the infrared ray received between lamp are blocked, to judge whether there is touch operation in infrared touch panel.
Scanning direction is pre-set infrared ray optical path in infrared touch panel.It is right when one emission lamp transmitting infrared ray
Multiple reception lamps in face can receive the infrared ray of emission lamp transmitting.Any reception lamp in side is received from emission lamp to opposite
Between infrared ray optical path be one angle of emission lamp optical path, i.e. a scanning direction, infrared ray under each scanning direction
Angle between road and transmitting side is certain.
Each scanning direction includes the scanning of long side transmitting side and long receiving while, short side transmitting side and short receiving while
Direction.For a scanning direction, emission lamp and reception lamp form according to one-to-one mode and emit reception pair.By according to
It is secondary to connect every a pair of of emission lamp and receive lamp, and then infrared touch panel is scanned under the scanning direction.
More than two scanning directions can be preset in infrared touch panel, each scan period includes each default scanning side
The infrared scanning of downward infrared scanning, each default scanning direction successively carries out.In infrared touch panel operation, pass through
Scan period one by one carries out infrared scanning to infrared touch panel again and again to infrared touch panel, perceives infrared touching
Touch the touch point of touch operation in screen.
Fig. 4 is that the structure of long side infrared ray optical path under two different scanning directions shown according to an exemplary embodiment is shown
It is intended to.
Scanning direction 1 is parallel to the short side direction of infrared touch panel, and A1, A2 ... An are the transmitting in long side transmitting side
Lamp, a1, a2 ... an are the reception lamp in long receiving while, and A1 and a1, A2 and a2 ... An and an separately constitute transmitting and receive
It is right, by control, be respectively turned on every a pair of of emission lamp in a certain order and receive lamp, thus every a pair of of transmitting receive lamp it
Between optical path be the optical path being parallel to each other.Similar, scanning direction 2 and the short side direction of infrared touch panel are at an angle,
B1, B2 ... Bm are the emission lamp in long side transmitting side, and b1, b2 ... bm are the reception lamp in long receiving while, B1 and b1, B2
And b2 ... Bm and bm separately constitute transmitting reception pair, by control, are respectively turned on every a pair of of emission lamp in a certain order
With reception lamp, thus every a pair of of emission lamp and the optical path received between lamp are the optical path being parallel to each other.
Lamp is received for some, receives the infrared ray that the emission lamp connected with it launches, which connects
The infra-red intensity value received, the as intensity value of the infrared ray optical path.When touching, a certain infrared ray optical path is blocked
Afterwards, the infra-red intensity value that the reception lamp of the infrared ray optical path receives will greatly reduce.
For example, Fig. 5 is one scanning direction when infrared touch panel shown according to an exemplary embodiment does not touch
The intensity value schematic diagram of lower infrared ray optical path.Since infrared touch panel does not touch, each infrared ray optical path does not all have
It is blocked, the intensity value of infrared ray optical path reaches maximum value.
Fig. 6 is infrared ray under one scanning direction when infrared touch panel shown according to an exemplary embodiment touches
The intensity value schematic diagram of optical path.Since infrared touch panel touches, part infrared ray optical path is caused to be blocked, what is be blocked is red
The infra-red intensity value that the reception lamp of outside line optical path receives will greatly reduce, and the degree being blocked due to infrared ray optical path
The reasons such as difference, the infrared ray optical path intensity value being blocked are also not exactly the same.Adjacent infrared ray optical path is same default scanning
Two adjacent infrared ray optical paths under direction.
Boundary intensity limit value is pre-set infra-red intensity limit value, and characterization infrared touch panel generation touch causes infrared
When linear light road is blocked, the critical strength that lamp receives infrared ray is received.
If the intensity value of infrared ray optical path is less than boundary intensity limit value, illustrate the region overlay touched to the infrared ray
Optical path causes the infrared ray optical path to be blocked, greatly reduces the intensity value of the infrared ray optical path.
If the intensity value of infrared ray optical path is greater than boundary intensity limit value, illustrate that touch operation does not occur in infrared touch panel,
Or the reasons such as the region that touches is smaller, only sub-fraction infrared ray is blocked in infrared ray optical path, passes through phase at this time
The intensity value of adjacent infrared ray optical path is verified, it is determined whether causes the infrared ray optical path to be blocked because occurring to touch.By right
The intensity value of infrared ray optical path is judged under each default scanning direction, identifies that the analog quantity under each default scanning direction touches
Region.
In the step s 120, the analog quantity touch area under each default scanning direction removes terrible point, and positions infrared
Touch point in touch screen.
Ghost point is the pseudo- touch point of the analog quantity touch area touch point Zhong Bushi.Due to infrared ray under each default scanning direction
There is a certain error for scanning, and the analog quantity touch area under each default scanning direction recognized includes only touch point
Region, touch point are a part in these regions, and more or less there is some terrible points in analog quantity touch area.Therefore it needs
Fixation and recognition is carried out after removing ghost to the analog quantity touch area under each default scanning direction, determines the touch in infrared touch panel
Point.
For example, calculating the overlapping region of each default scanning direction lower die analog quantity touch area recognized, the overlapping region
As touch point of the user to infrared touch panel progress touch operation.
In another example choosing a most default scanning direction of analog quantity touch area, extract under the default scanning direction
Touch the central point of each analog quantity touch area, and then whether authentication center point is in other analog quantity touchings under presetting scanning direction
It touches in region, if it has, then the corresponding analog quantity touch area of confirmation central point is the region touched, i.e. infrared touch panel
In touch point.
By method as described above, when carrying out fixation and recognition to the touch operation in infrared touch panel, obtain each pre-
If the intensity value of infrared ray optical path under scanning direction, judge whether the intensity value of infrared ray optical path reaches preset boundary intensity limit
Value, and the relationship between the infrared ray optical path and adjacent infrared ray optical path intensity value is combined, it determines under each default scanning direction
Analog quantity touch area, and then the touch point in infrared touch panel is positioned according to analog quantity touch area, thus infrared identifying
When whether linear light road is in analog quantity touch area, judge infrared ray optical path intensity value and boundary intensity limit value relationship when
Judged in conjunction with the intensity value of adjacent infrared ray optical path, is avoided smaller or the problems such as edge is unsmooth causes in touching object
The problem of infrared ray optical path is unsatisfactory for binarization threshold and identification touch point can not be accurately positioned, improves in infrared touch panel
Touch the accuracy of positioning.
Fig. 7 is the description of the details shown according to an exemplary embodiment to step S110.Step S110 can wrap
Include following steps.
In step S111, infrared touch panel successively carries out periodic infrared scanning according to each default scanning direction
In, for the infrared ray optical path under each default scanning direction, by the intensity value of infrared ray optical path to adjacent infrared ray optical path
Intensity value and preset boundary intensity limit value are compared respectively, are determined as the infrared ray optical path on boundary.
Boundary is the edge boundary for the analog quantity touch area identified under default scanning direction.Each default scanning direction
Under, judgement identification is carried out to each infrared ray optical path in a certain order, meets preset boundary intensity limit value in intensity value and wants
Ask or multiple adjacent infrared ray optical paths of the intensity value requirement of adjacent infrared ray optical path in, determine near infrared touch platen edge
Infrared ray optical path as boundary.
The analog quantity touch area identified under default scanning direction is identified using infrared ray optical path as boundary,
Specifically, being swept for an analog quantity touch area under scanning direction default for one comprising long side in infrared touch panel
Retouch four infrared ray optical paths of direction and short side scanning direction, as boundary.
For example, Fig. 8 is infrared ray roadside circle when infrared touch panel shown according to an exemplary embodiment touches
Schematic diagram.When determining boundary, successively infrared ray optical path A1, A2, A3 ... are judged.Since infrared ray optical path A1 is red
Infrared ray optical path in edge in outer touch screen, when judging infrared ray optical path A1, to the intensity value of infrared ray optical path A1 and
Intensity value, the preset boundary intensity limit value of adjacent infrared ray optical path A2 compares respectively, is confirmed according to comparing result infrared
Whether linear light road A1 is boundary；When judging infrared ray optical path A2, intensity value to infrared ray optical path A2 and adjacent red
The intensity value of outside line optical path A1, A3, preset boundary intensity limit value compare respectively, confirm infrared ray according to comparing result
Whether road A2 is boundary.
In step S112, determine infrared touch panel under default scanning direction by the infrared ray optical path as boundary
Analog quantity touch area.
Fig. 9 is the structural representation of default scanning direction lower die analog quantity touch area shown according to an exemplary embodiment
Figure.Scanning direction is 90 degree of directions, and infrared ray optical path 10 and 20 is two boundaries of longitudinal direction under the scanning direction, infrared ray
Optical path 30 and 40 is two boundaries of short side direction under the scanning direction, so that it is determined that analog quantity touch area A is infrared ray
Region between road 10 and 20, region of the analog quantity touch area B between infrared ray optical path 30 and 40, and then determine analog quantity
Touch area AB is the analog quantity touch area under 90 degree of scanning directions.
By method as described above, under each default scanning direction, meet in the intensity value of infrared ray optical path preset
In multiple adjacent infrared ray optical paths that boundary intensity limit value requires or the intensity value of adjacent infrared ray optical path requires, it is determined as side
The infrared ray optical path on boundary, and the analog quantity touch area under the default scanning direction is determined according to boundary, to pass through infrared ray
Opposite variation limit value between the absolute bound intensity limit value and adjacent infrared ray optical path of optical path intensity value carries out analog quantity touch
The identification in region prevents the problems such as touching object is smaller or edge is unsmooth and leads to not recognize touch point, improves
The accuracy of positioning is touched in infrared touch panel.
Figure 10 is the description of the details shown according to an exemplary embodiment to step S111.In step S111, boundary
Including beginning boundary and boundary is terminated, step S111 may comprise steps of.
In step S1111, infrared touch panel successively carries out periodic infrared ray according to each default scanning direction and sweeps
In retouching, for the infrared ray optical path under each default scanning direction, determine that intensity value is less than preset boundary intensity limit value or phase
The infrared ray optical path for meeting the intensity value of adjacent infrared ray optical path the opposite variation limit value requirement of preset intensity is beginning boundary.
Beginning boundary is that intensity value, which meets absolute strength value, to be wanted according to the sequence of positions of infrared ray optical path in infrared touch panel
It asks or the infrared ray optical path of relative intensity value requirement.
The specific implementation for meeting intensity value the infrared ray optical path of relative intensity value requirement, can be infrared ray optical path and phase
The difference of the intensity value of adjacent infrared ray optical path meets preset requirement, is also possible to the strong of infrared ray optical path and adjacent infrared ray optical path
The ratio between angle value meets preset requirement, can also be other implementations.
Specifically, check under default scanning direction is in adjacent infrared ray optical path according to the sequence of positions of infrared ray optical path
No infrared ray optical path is less than the intensity value of previous infrared ray optical path, and the intensity value phase of infrared ray optical path and previous infrared ray optical path
Preset intensity is less than to difference and changes limit value relatively, and the intensity value of infrared ray optical path is greater than preset boundary intensity limit value.
It is blocked if it has not, then characterizing the infrared ray optical path, using the infrared ray optical path as beginning boundary；If it has, then be not processed,
Next infrared ray optical path is examined successively.
Figure 11 is the schematic diagram shown according to an exemplary embodiment that beginning boundary is determined in infrared ray optical path.According to
The sequence of positions of infrared ray optical path need to only check infrared ray optical path since infrared ray optical path A1 is in the boundary of infrared touch panel
Whether the intensity value of A1 is greater than preset boundary intensity limit value, when infrared ray optical path A1 is greater than preset boundary intensity limit value,
Then infrared ray optical path A1 is not beginning boundary, is not processed；Then the intensity value of infrared ray optical path A2 and previous red is checked whether
The relative difference of the intensity value of outside line optical path A1 is less than preset intensity and changes limit value, and the intensity value of infrared ray optical path A2 relatively
Greater than preset boundary intensity limit value, when to be no, then infrared ray optical path A2 is determined as beginning boundary；If it has, then not doing
Processing, is examined successively next infrared ray optical path.
For example, infrared ray optical path A1 is first infrared ray optical path according to the sequence of positions of infrared ray optical path in Fig. 7,
Intensity value is respectively 100, and boundary intensity limit value is 60, and the opposite variation limit value of intensity is 25, due to the intensity of infrared ray optical path A1
Value meets the requirement for being greater than preset boundary intensity limit value, then by infrared ray optical path A1 not as beginning boundary.
In another example successively adjacent infrared ray optical path A1, A2, A3's is strong according to the sequence of positions of infrared ray optical path in Fig. 7
Angle value is respectively 100,95,65, and boundary intensity limit value is 60, and the opposite variation limit value of intensity is 25, due to infrared ray optical path A2's
Intensity value, which meets, is greater than preset boundary intensity limit value 60, and the difference of the intensity value of infrared ray optical path A2 and infrared ray optical path A1 is
5, it is less than the opposite variation limit value 25 of intensity, then infrared ray optical path A2 is not beginning boundary；And the intensity value of infrared ray optical path A3 is not
Meet and be greater than preset boundary intensity limit value 60, and the difference of the intensity value of infrared ray optical path A3 and infrared ray optical path A2 is 30, greatly
In the opposite variation limit value 25 of intensity, then infrared ray optical path A2 is as beginning boundary.
In step S1112, according to the sequence of positions of infrared ray optical path, for as the infrared ray after beginning boundary
Road determines that intensity value is greater than preset boundary intensity limit value, or relatively adjacent infrared ray optical path intensity value meet it is preset strong
The infrared ray optical path that the opposite variation limit value of degree requires is to terminate boundary.
After judging as the infrared ray optical path of beginning boundary, according to the sequence of positions of infrared ray optical path, as starting
Infrared ray optical path after boundary terminate the judgement on boundary.
Terminating boundary is that intensity value, which meets absolute strength value, to be wanted according to the sequence of positions of infrared ray optical path in infrared touch panel
It asks or the infrared ray optical path of relative intensity value requirement.
The specific implementation for meeting intensity value the infrared ray optical path of relative intensity value requirement, can be infrared ray optical path and phase
The difference of the intensity value of adjacent infrared ray optical path meets preset requirement, is also possible to the strong of infrared ray optical path and adjacent infrared ray optical path
The ratio between angle value meets preset requirement, can also be other implementations.
Specifically, according to the sequence of positions of infrared ray optical path, in as the infrared ray optical path after beginning boundary, successively
Check whether that the difference of the intensity value of infrared ray optical path and previous infrared ray optical path is less than the difference of the opposite variation limit value of preset intensity,
And the intensity value of infrared ray optical path is less than preset boundary intensity limit value.If NO, it is determined that infrared ray optical path is to terminate boundary；
If it has, then being not processed, next infrared ray optical path is examined successively.
Figure 12 is the schematic diagram shown according to an exemplary embodiment for determining in infrared ray optical path and terminating boundary.According to
Infrared ray optical path is examined successively after as beginning boundary in the sequence of positions of infrared ray optical path, so that it is determined that as side is terminated
The infrared ray optical path on boundary.Since infrared ray optical path A3 is beginning boundary, infrared ray optical path A4, A5, A6 ... is examined successively
It whether is to terminate boundary.When checking infrared ray optical path A4, the intensity value and previous infrared ray of infrared ray optical path A4 are checked whether
The difference of the intensity value of road A3 is less than preset intensity and changes limit value relatively, and the intensity value of infrared ray optical path A4 is less than in preset
Infrared ray optical path A4 is then determined as terminating boundary by boundary intensity limit value when to be no；If it has, then being not processed, successively examine
Look into next infrared ray optical path.
For example, according to the sequence of positions of infrared ray optical path in Figure 12, five successively adjacent infrared ray optical path A3, A4, A5,
The intensity value of A6, A7 are respectively 65,50,25,45,65, and boundary intensity limit value is 60, and the opposite variation limit value of intensity is 25, infrared
Linear light road A3 is as beginning boundary.Due to the difference of the intensity value of the intensity value and previous infrared ray optical path A3 of infrared ray optical path A4
It is -15, is less than the opposite variation limit value 25 of intensity, and the intensity value 50 of infrared ray optical path A4 is less than boundary intensity limit value 60, therefore,
Infrared ray optical path A4 is not as termination boundary；Similarly, infrared ray optical path A5, A6 is also not as termination boundary；Due to infrared ray
The difference of the intensity value of the intensity value of road A7 and previous infrared ray optical path A6 is 20, is less than the opposite variation limit value 25 of intensity, but infrared
The intensity value 65 of linear light road A7 is greater than boundary intensity limit value 60, therefore, using infrared ray optical path A7 as termination boundary.
By method as described above, under each default scanning direction, meet in the intensity value of infrared ray optical path preset
In multiple adjacent infrared ray optical paths that boundary intensity limit value requires and the intensity value of adjacent infrared ray optical path requires, it has been determined as
The infrared ray optical path of initial line circle, and determined in the infrared ray optical path after beginning boundary and terminate boundary, and then determine each side
Downward analog quantity touch area ensure that touch point in these analog quantity touch areas.
Following is embodiment of the present disclosure, and the touch localization method that can be used for executing this above-mentioned infrared touch panel is implemented
Example.For those undisclosed details in the apparatus embodiments, the touch localization method for please referring to disclosure infrared touch panel is real
Apply example.
Figure 13 is a kind of block diagram of the touch positioning device of infrared touch panel shown according to an exemplary embodiment, the dress
It sets including but not limited to: touch area determining module 110 and locating module 120.
Touch area determining module 110 successively carries out periodically according to each default scanning direction for infrared touch panel
Infrared scanning in, according to the intensity value of infrared ray optical path adjacent under default scanning direction and preset boundary intensity limit value,
Determine the analog quantity touch area under default scanning direction；
Locating module 120 removes terrible point for the analog quantity touch area under each default scanning direction, and positions red
Touch point in outer touch screen.
The function of modules and the realization process of effect are specifically detailed in the touch positioning device of above-mentioned infrared touch panel
The realization process of step is corresponded in the touch localization method of above-mentioned infrared touch panel, details are not described herein.
Optionally, as shown in figure 14, touch area determining module 110 includes but is not limited to: boundary determines 111 He of submodule
Touch area determines submodule 112.
Boundary determines submodule 111, successively carries out according to each default scanning direction for infrared touch panel periodic
In infrared scanning, for the infrared ray optical path under each default scanning direction, by the intensity value of infrared ray optical path to adjacent red
The intensity value of outside line optical path and preset boundary intensity limit value are compared respectively, are determined as the infrared ray optical path on boundary；
Touch area determines submodule 112, for determining infrared touch panel pre- by the infrared ray optical path as boundary
If the analog quantity touch area under scanning direction.
Optionally, as shown in figure 15, boundary determines that submodule 111 includes but is not limited to: beginning boundary determination unit 1111
With termination boundary determination unit 1112.
Beginning boundary determination unit 1111 successively carries out periodically according to each default scanning direction for infrared touch panel
Infrared scanning in, for the infrared ray optical path under each default scanning direction, it is strong to determine that intensity value is less than preset boundary
Limit value is spent, or the intensity value of relatively adjacent infrared ray optical path meets the opposite infrared ray optical path for changing limit value requirement of preset intensity
For beginning boundary；
Terminate boundary determination unit 1112, for the sequence of positions according to infrared ray optical path, for as beginning boundary it
Infrared ray optical path afterwards determines that intensity value is greater than preset boundary intensity limit value, or the intensity value of relatively adjacent infrared ray optical path
Meet the infrared ray optical path of the opposite variation limit value requirement of preset intensity to terminate boundary.
Optionally, as shown in figure 16, beginning boundary determination unit 1111 includes but is not limited to: beginning boundary judgment sub-unit
11111 and beginning boundary determine subelement 11112.
Beginning boundary judgment sub-unit 11111 checks default scanning direction for the sequence of positions according to infrared ray optical path
Under whether infrared ray optical path is less than the intensity value of previous infrared ray optical path in adjacent infrared ray optical path, and infrared ray optical path and previous
The intensity value relative difference of infrared ray optical path is less than preset intensity and changes limit value relatively, and the intensity value of infrared ray optical path is greater than
Preset boundary intensity limit value；
Beginning boundary determines subelement 11112, for if NO, it is determined that infrared ray optical path is beginning boundary.
Optionally, as shown in figure 17, terminating boundary determination unit 1112 includes but is not limited to: it is single to play termination boundary judgement
Member 11121 and termination boundary determine subelement 11122.
Boundary judgment sub-unit 11121 is terminated, for the sequence of positions according to infrared ray optical path, after beginning boundary
In infrared ray optical path, it is examined successively whether the difference of the intensity value of infrared ray optical path and previous infrared ray optical path is less than preset intensity
The difference of opposite variation limit value, and the intensity value of infrared ray optical path is less than preset boundary intensity limit value；
It terminates boundary and determines subelement 11122, for if NO, it is determined that infrared ray optical path is to terminate boundary.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and change can executed without departing from the scope.The scope of the present invention is limited only by the attached claims.
Claims (8)
1. a kind of touch localization method of infrared touch panel characterized by comprising
Infrared touch panel successively carries out in periodic infrared scanning according to each default scanning direction, sweeps for each preset
The infrared ray optical path under direction is retouched, by the intensity value of the infrared ray optical path to the intensity value of adjacent infrared ray optical path and preset
Boundary intensity limit value is compared respectively, is determined as the infrared ray optical path on boundary, and the intensity value of the infrared ray optical path is institute
State the infra-red intensity value that infrared ray optical path receiving end receives；
Simulation of the infrared touch panel under the default scanning direction is determined by the infrared ray optical path as boundary
Measure touch area；
Analog quantity touch area under each default scanning direction removes terrible point, and positions the touch in the infrared touch panel
Point.
2. the method according to claim 1, wherein the boundary include beginning boundary and terminate boundary, it is described
Infrared touch panel successively carries out in periodic infrared scanning according to each default scanning direction, for each default scanning side
Downward infrared ray optical path, by the intensity value of the infrared ray optical path to the intensity value of the adjacent infrared ray optical path and preset
The step of boundary intensity limit value is compared respectively, is determined as the infrared ray optical path on boundary include:
Infrared touch panel successively carries out in periodic infrared scanning according to each default scanning direction, sweeps for each preset
The infrared ray optical path under direction is retouched, determines that intensity value is less than preset boundary intensity limit value, or relatively adjacent infrared ray optical path
The infrared ray optical path that intensity value meets the opposite variation limit value requirement of preset intensity is beginning boundary；
According to the sequence of positions of infrared ray optical path, in as the infrared ray optical path after the beginning boundary, determine strong
Angle value is greater than preset boundary intensity limit value, or the intensity value of relatively adjacent infrared ray optical path meets the opposite variation of preset intensity
The infrared ray optical path that limit value requires is to terminate boundary.
3. according to the method described in claim 2, it is characterized in that, the infrared touch panel is successively according to each default scanning side
Into the periodic infrared scanning of progress, for the infrared ray optical path under each default scanning direction, determine that intensity value is less than
Preset boundary intensity limit value, or the intensity value of relatively adjacent infrared ray optical path meet the opposite variation limit value requirement of preset intensity
Infrared ray optical path be beginning boundary step include:
According to the sequence of positions of infrared ray optical path, check under the default scanning direction in adjacent infrared ray optical path whether infrared ray
Optical path is less than the intensity value of previous infrared ray optical path, and the intensity value phase of the infrared ray optical path and the previous infrared ray optical path
Preset intensity is less than to difference and changes limit value relatively, and the intensity value of the infrared ray optical path is limited greater than preset boundary intensity
Value；
If NO, it is determined that the infrared ray optical path is beginning boundary.
4. according to the method described in claim 2, it is characterized in that, the sequence of positions according to infrared ray optical path, for institute
Infrared ray optical path after stating as beginning boundary determines that intensity value is greater than preset boundary intensity limit value, or relatively adjacent red
The intensity value of outside line optical path meets the step of infrared ray optical path of the opposite variation limit value requirement of preset intensity is terminates boundary packet
It includes:
According to the sequence of positions of infrared ray optical path, in the infrared ray optical path after the beginning boundary, whether red it is examined successively
The difference of the intensity value of outside line optical path and previous infrared ray optical path is less than the difference of the opposite variation limit value of preset intensity, and described infrared
The intensity value on linear light road is less than preset boundary intensity limit value；
If NO, it is determined that the infrared ray optical path is to terminate boundary.
5. a kind of touch positioning device of infrared touch panel characterized by comprising
Boundary determines submodule, successively carries out periodic infrared ray according to each default scanning direction for infrared touch panel and sweeps
In retouching, for the infrared ray optical path under each default scanning direction, by the intensity value of the infrared ray optical path to adjacent infrared ray
The intensity value of optical path and preset boundary intensity limit value are compared respectively, are determined as the infrared ray optical path on boundary, described red
The intensity value of outside line optical path is the infra-red intensity value that infrared ray optical path receiving end receives；
Touch area determines submodule, for determining the infrared touch panel in institute by the infrared ray optical path as boundary
State the analog quantity touch area under default scanning direction；
Locating module removes terrible point for the analog quantity touch area under each default scanning direction, and positions described infrared
Touch point in touch screen.
6. device according to claim 5, which is characterized in that the boundary determines that submodule includes:
Beginning boundary determination unit successively carries out periodic infrared ray according to each default scanning direction for infrared touch panel
In scanning, for the infrared ray optical path under each default scanning direction, determine that intensity value is less than preset boundary intensity limit value, or
The infrared ray optical path that the intensity value of relatively adjacent infrared ray optical path meets the opposite variation limit value requirement of preset intensity has been initial line
Boundary；
Boundary determination unit is terminated, for the sequence of positions according to infrared ray optical path, as the institute after the beginning boundary
It states in infrared ray optical path, determines that intensity value is greater than preset boundary intensity limit value, or the intensity value of relatively adjacent infrared ray optical path
Meet the infrared ray optical path of the opposite variation limit value requirement of preset intensity to terminate boundary.
7. device according to claim 6, which is characterized in that the beginning boundary determination unit includes:
Beginning boundary judgment sub-unit checks phase under the default scanning direction for the sequence of positions according to infrared ray optical path
Whether infrared ray optical path is less than the intensity value of previous infrared ray optical path, and the infrared ray optical path and described in adjacent infrared ray optical path
The intensity value relative difference of previous infrared ray optical path is less than preset intensity and changes limit value relatively, and the infrared ray optical path is strong
Angle value is greater than preset boundary intensity limit value；
Beginning boundary determines subelement, for if NO, it is determined that the infrared ray optical path is beginning boundary.
8. device according to claim 6, which is characterized in that termination boundary determination unit includes:
Boundary judgment sub-unit is terminated, it is infrared after the beginning boundary for the sequence of positions according to infrared ray optical path
In linear light road, be examined successively whether the difference of the intensity value of infrared ray optical path and previous infrared ray optical path to be less than preset intensity opposite
Change the difference of limit value, and the intensity value of the infrared ray optical path is less than preset boundary intensity limit value；
It terminates boundary and determines subelement, for if NO, it is determined that the infrared ray optical path is to terminate boundary.
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| CN113076031B (en) * | 2021-03-31 | 2023-09-22 | 青岛海信商用显示股份有限公司 | Display equipment, touch positioning method and device |
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