CN106371674A - Method and device for locating touch on infrared touch screen - Google Patents
Method and device for locating touch on infrared touch screen Download PDFInfo
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- CN106371674A CN106371674A CN201610817243.3A CN201610817243A CN106371674A CN 106371674 A CN106371674 A CN 106371674A CN 201610817243 A CN201610817243 A CN 201610817243A CN 106371674 A CN106371674 A CN 106371674A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000000737 periodic effect Effects 0.000 claims abstract description 16
- 230000004807 localization Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 12
- 238000004088 simulation Methods 0.000 claims description 2
- 108010001267 Protein Subunits Proteins 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 4
- 238000006127 Vicarious substitution reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
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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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- Theoretical Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a method and a device for locating a touch on an infrared touch screen. The method comprises the following steps: when periodic infrared scanning is sequentially carried out on the infrared touch screen according to all preset scanning directions, determining analog quantity touch zones under the preset scanning directions according to strength values of adjacent infrared light paths under the preset scanning directions and a preset boundary strength limiting value; removing ghost points in the analog quantity touch zones under all the preset scanning directions, and locating touch points in the infrared touch screen. According to the method and the device for locating the touch on the infrared touch screen, disclosed by the invention, the problem that the touch points cannot be located and identified as the infrared light paths do not meet a binary threshold due to the problems such as smaller touch objects or unsmooth edge can be prevented from happening, so that the accuracy of locating the touch on the infrared touch screen is increased.
Description
Technical field
It relates to infrared touch-control field, particularly to a kind of touch localization method of infrared touch panel and device.
Background technology
Touch screen be a kind of can receives input signal vicariouss display device, provide one kind for current electronic product
Simply, conveniently, natural subscriber computer exchange method.In various types of touch screens, infrared touch screen adapts to due to having environment
Property strong, the life-span is longer, recognizable touch the advantages such as points are more and be widely used.
In infrared touch panel, detect whether infrared ray light path is blocked by noctovisor scan, and then determine infrared touch
Touch point in screen.At present, infrared touch panel is carried out touch the binaryzation information that positioning is all based on infrared ray light path, that is,
Judge the magnitude relationship between infrared ray light path intensity level and binary-state threshold, and then position the touch point in infrared touch panel.
However, when occur touch location less, touch physics edge unsmooth when, be based only on infrared ray light path
Binaryzation information carry out the positioning that touches of infrared touch panel and arise that the problem of Wrong localization, greatly reduce infrared ray
The accuracy of positioning is touched in touch screen.
For example, Fig. 1 is infrared ray light path intensity level and binaryzation information schematic diagram when infrared touch panel occurs to touch.Logical
Cross setting binary-state threshold the intensity level of each infrared ray light path is judged, obtain the binaryzation letter of infrared ray light path intensity level
Breath.When occur touch location less, touch physics edge unsmooth when, due to touch edge or little touch point etc. to red
The stop degree of outside line light path is simultaneously little, and correspondingly, the degree that the intensity level of infrared ray light path reduces is also little, is not reaching to two
Value threshold value standard, thus lead to touch Wrong localization.
Therefore, the accuracy touching positioning in raising infrared touch panel becomes technical problem currently urgently to be resolved hurrily.
Content of the invention
For the relatively low technical problem of the accuracy solving to touch positioning in correlation technique middle infrared (Mid-IR) touch screen, the disclosure
Provide a kind of touch localization method of infrared touch panel and device.
A kind of touch localization method of infrared touch panel, comprising:
Infrared touch panel carries out in periodic noctovisor scan according to each default scanning direction successively, according to described pre-
If the intensity level of adjacent infrared ray light path and default boundary intensity limit value, determine under described 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 described infrared touch panel
Touch point.
A kind of touch positioning device of infrared touch panel, comprising:
Touch area determining module, carries out periodically red successively for infrared touch panel according to each default scanning direction
In outside line scanning, the intensity level according to infrared ray light path adjacent under described default scanning direction and default boundary intensity limit value,
Determine the analog quantity touch area under described default scanning direction；
Locating module, removes terrible point for the analog quantity touch area under each default scanning direction, and positions described
Touch point in infrared touch panel.
The technical scheme that embodiment of the disclosure provides can include following beneficial effect:
When touch operation in infrared touch panel is carried out touch with positioning, preset according to each successively in infrared touch panel and sweep
Retouch direction to carry out in periodic noctovisor scan, the intensity level according to infrared ray light path adjacent under default scanning direction and default
Boundary intensity limit value be reference, determine the analog quantity touch area under each default scanning direction, under each default scanning direction
Analog quantity touch area remove terrible point, and position the touch point in infrared touch panel, by judging the strong of infrared ray light path
During the relation of angle value and boundary intensity limit value, the intensity level with reference to adjacent infrared ray light path is judged, it is to avoid in touching object
Less or lead to infrared ray light path to be unsatisfactory for binary-state threshold the problems such as edge is unsmooth and cannot the asking of fixation and recognition touch point
Topic, improves the accuracy touching positioning in infrared touch panel.
It should be appreciated that above general description and detailed description hereinafter are only exemplary, can not be limited this
Open.
Brief description
Accompanying drawing herein is merged in description and constitutes the part of this specification, shows the enforcement meeting the present invention
Example, and be used for explaining the principle of the present invention together with description.
Fig. 1 is infrared ray light path intensity level and binaryzation information schematic diagram when infrared touch panel occurs to touch；
Fig. 2 is a kind of flow chart of the touch localization method of infrared touch panel according to an exemplary embodiment；
Fig. 3 is a kind of structural representation of the infrared touch panel according to an exemplary embodiment；
Fig. 4 is that the structure of the two different scanning directions Xia Chang side infrared ray light path according to an exemplary embodiment is shown
It is intended to；
Fig. 5 is infrared under one scanning direction when infrared touch panel according to an exemplary embodiment does not occur to touch
The intensity level schematic diagram on linear light road；
Fig. 6 is that the infrared touch panel according to an exemplary embodiment occurs infrared ray under one scanning direction during touch
The intensity level schematic diagram of light path；
Fig. 7 is the corresponding intensity level according to infrared ray light path adjacent under described default scanning direction implementing to exemplify of Fig. 1,
It is the method flow diagram with reference to the touch area step determining under described default scanning direction with default boundary intensity limit value；
Fig. 8 is the signal on infrared ray roadside circle during the infrared touch panel generation touch according to an exemplary embodiment
Figure；
Fig. 9 is the structural representation of the default scanning direction Imitating amount touch area according to an exemplary embodiment
Figure；
Figure 10 is the intensity level to adjacent infrared ray light path for the corresponding intensity level by infrared ray light path implementing to exemplify of Fig. 7
Compare respectively with default boundary intensity limit value, determine the method flow diagram of the infrared ray light path step as border；
Figure 11 is the schematic diagram determining beginning boundary in infrared ray light path according to an exemplary embodiment；
Figure 12 is the schematic diagram determining termination border in infrared ray light path according to an exemplary embodiment；
Figure 13 is a kind of block diagram of the touch positioning device of infrared touch panel according to an exemplary embodiment；
Figure 14 is the block diagram of the corresponding touch area determining module implementing to exemplify of Figure 13；
Figure 15 is the block diagram of the corresponding border determination sub-module implementing to exemplify of Figure 14；
Figure 16 is the block diagram of the corresponding beginning boundary determining unit implementing to exemplify of Figure 15；
Figure 17 is the corresponding block diagram terminating border determining unit implementing to exemplify of Figure 15.
Specific embodiment
Here in detail explanation will be executed to exemplary embodiment, its example is illustrated in the accompanying drawings.Explained below is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the present invention.On the contrary, they be only with such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, the present invention.
Fig. 2 is a kind of flow chart of the touch localization method of infrared touch panel according to an exemplary embodiment.As
Shown in Fig. 2, the touch localization method of this infrared touch panel may comprise steps of.
In step s110, infrared touch panel carries out periodic noctovisor scan according to each default scanning direction successively
In, the intensity level according to infrared ray light path adjacent under default scanning direction and default boundary intensity limit value, determine default scanning
Analog quantity touch area under direction.
Carry out periodic noctovisor scan according to each default scanning direction successively, to perceive to red in infrared touch panel
Outer touch screen carries out the touch point of touch operation.
It should be understood that in infrared touch panel, being accordingly equiped with emission lamp and receive lamp, being lighted by emission lamp
With the reception 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 representation of the infrared touch panel according to an exemplary embodiment.As shown in figure 3, it is infrared
The outward appearance of touch screen is a rectangular configuration, is made up of long side and minor face.Long when including a long edge emitting 110 and one long
Receiving while 120, minor face includes a minor face transmitting side 130 and a short receiving while 140.On long edge emitting side 110 and short
Some emission lamps are equiped with edge emitting side 130, in long receiving while 120 and short receiving while 140, correspondence is equiped with accordingly
Some reception lamps.By control these emission lamps and receive lamp make its according to one-to-one mode form transmitting receive right, and
It is respectively turned on every a pair of emission lamp in a certain order and receive lamp and carry out noctovisor scan.By detecting every a pair of transmitting
Whether lamp and the infrared ray receiving between lamp are blocked, and to judge whether there is touch operation in infrared touch panel.
Scanning direction is the infrared ray light path pre-setting in infrared touch panel.During one emission lamp transmitting infrared ray, right
Multiple reception lamps in face all can receive the infrared ray of this emission lamp transmitting.Arbitrary reception lamp in side is received from emission lamp to opposite
Between infrared ray light path be one angle of emission lamp light 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 edge emitting side and long receiving while, minor face transmitting side and short receiving while
Direction.For a scanning direction, it is right that emission lamp and reception lamp form transmitting reception according to one-to-one mode.By according to
Every a pair of the emission lamp of secondary connection and reception lamp, and then under this scanning direction, infrared touch panel is scanned.
Plural scanning direction can be preset, each scan period all includes each default scanning side in infrared touch panel
Downward noctovisor scan, the noctovisor scan of each default scanning direction is carried out successively.During infrared touch panel runs, pass through
Scan period one by one carries out noctovisor scan again and again to infrared touch panel to infrared touch panel, and perception is infrared to touch
Touch the touch point of touch operation in screen.
Fig. 4 is that the structure of the two different scanning directions Xia Chang side infrared ray light path according to an exemplary embodiment is shown
It is intended to.
Parallel to the short side direction of infrared touch panel, a1, a2 ... an is the transmitting in long edge emitting side for scanning direction 1
Lamp, a1, a2 ... an is the reception lamp in long receiving while, a1 and a1, a2 and a2 ... an and an separately constitute transmitting and receive
Right, by control, be respectively turned in a certain order every a pair of emission lamp and receive lamp, thus every a pair of transmitting receive lamp it
Between light path be the light path being parallel to each other.Similar, scanning direction 2 is at an angle with the short side direction of infrared touch panel,
B1, b2 ... bm is the emission lamp in long edge emitting side, and b1, b2 ... bm is the reception lamp in long receiving while, b1 and b1, b2
And b2 ... bm and bm separately constitute transmitting receive right, by control, be respectively turned on every a pair of emission lamp in a certain order
With reception lamp, thus every a pair of emission lamp and the light path receiving between lamp are the light path being parallel to each other.
Lamp is received for some, it receives the infrared ray that the emission lamp connected with it is launched, and this reception lamp connects
The infra-red intensity value receiving, is the intensity level of this infrared ray light path.When touching, a certain infrared ray light path is blocked
Afterwards, the infra-red intensity value that the reception lamp of this infrared ray light path receives will greatly reduce.
For example, Fig. 5 is one scanning direction when infrared touch panel according to an exemplary embodiment does not occur to touch
The intensity level schematic diagram of lower infrared ray light path.Because infrared touch panel touches, therefore each infrared ray light path does not all have
It is blocked, the intensity level of infrared ray light path all reaches maximum.
Fig. 6 is that the infrared touch panel according to an exemplary embodiment occurs infrared ray under one scanning direction during touch
The intensity level schematic diagram of light path.Because infrared touch panel touches, part infrared ray light path is led to be blocked, be blocked is red
The infra-red intensity value that the reception lamp of outside line light path receives will greatly reduce, and the degree being blocked due to infrared ray light path
Not equal reason, the infrared ray light path intensity level being blocked is also incomplete same.Adjacent infrared ray light path is same default scanning
Adjacent two infrared ray light paths under direction.
Boundary intensity limit value is the infra-red intensity limit value pre-setting, and it is infrared that sign infrared touch panel occurs touch to lead to
When linear light road is blocked, receives lamp and receive ultrared critical strength.
If the intensity level of infrared ray light path is less than boundary intensity limit value, illustrate the region overlay touching to occur to this infrared ray
Light path, leads to this infrared ray light path to be blocked, so that the intensity level of this infrared ray light path is greatly reduced.
If the intensity level of infrared ray light path is more than boundary intensity limit value, illustrate, in infrared touch panel, touch operation does not occur,
Or the reason such as region is less occurring to touch, is that sub-fraction infrared ray is blocked, now by phase in infrared ray light path
The intensity level of adjacent infrared ray light path is verified, it is determined whether because occurring touch to lead to this infrared ray light path to be blocked.By right
Under each default scanning direction, the intensity level of infrared ray light path is judged, identifies that the analog quantity under each default scanning direction touches
Region.
In step s120, 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 analog quantity touch area Zhong Bushi touch point.Due to infrared ray under each default scanning direction
All there is certain error in scanning, the analog quantity touch area under each default scanning direction recognizing simply comprises touch point
Region, touch point is the part in these regions, more or less there are some terrible points in analog quantity touch area.Therefore need
Remove to carry out fixation and recognition after ghost to the analog quantity touch area under each default scanning direction, determine the touch in infrared touch panel
Point.
For example, the overlapping region of each default scanning direction Imitating amount touch area recognizing, this overlapping region are calculated
It is the touch point that user carries out touch operation to infrared touch panel.
Again for example, choose a most default scanning direction of analog quantity touch area, extract under this default scanning direction
Touch the central point of each analog quantity touch area, so authentication center point the analog quantity under other default scanning directions is touched
Touch in region, if it has, then confirming that central point corresponding analog quantity touch area is the region occurring to touch, i.e. infrared touch panel
In touch point.
By method as above, when fixation and recognition is carried out to the touch operation in infrared touch panel, obtain each pre-
If the intensity level of infrared ray light path under scanning direction, judge whether the intensity level of infrared ray light path reaches default boundary intensity limit
Value, and combine the relation between this infrared ray light path and adjacent infrared ray light path intensity level, determine 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 the intensity level of infrared ray light path and boundary intensity limit value relation when
Intensity level in conjunction with adjacent infrared ray light path judged, it is to avoid less or lead to the problems such as edge is unsmooth in touching object
Infrared ray light path is unsatisfactory for binary-state threshold and cannot be accurately positioned the problem of identification touch point, improves in infrared touch panel
Touch the accuracy of positioning.
Fig. 7 is the description of the details to step s110 according to an exemplary embodiment.This step s110 can be wrapped
Include following steps.
In step s111, infrared touch panel carries out periodic noctovisor scan according to each default scanning direction successively
In, for the infrared ray light path under each default scanning direction, by infrared ray light path intensity level to adjacent infrared ray light path
Intensity level and default boundary intensity limit value are compared respectively, determine the infrared ray light path as border.
Border is the edge boundary of the analog quantity touch area identified under default scanning direction.Each default scanning direction
Under, each infrared ray light path is carried out judging identification in a certain order, meeting default boundary intensity limit value in intensity level will
Ask or the multiple adjacent infrared ray light path that requires of intensity level of adjacent infrared ray light path in, determine near infrared touch platen edge
Infrared ray light path as border.
The analog quantity touch area identified under default scanning direction is identified using infrared ray light path as border,
Specifically, for an analog quantity touch area under a default scanning direction, comprise long side in infrared touch panel and sweep
Retouch four infrared ray light paths of direction and minor face scanning direction, as border.
For example, Fig. 8 is infrared ray roadside circle during the infrared touch panel generation touch according to an exemplary embodiment
Schematic diagram.When determining border, successively infrared ray light path a1, a2, a3 ... are judged.Because infrared ray light path a1 is red
Infrared ray light path in edge in outer touch screen, when judging to infrared ray light path a1, to the intensity level of infrared ray light path a1 and
The intensity level of adjacent infrared ray light path a2, default boundary intensity limit value are contrasted respectively, are confirmed infrared according to comparing result
Whether linear light road a1 is border；When judging to infrared ray light path a2, intensity level to infrared ray light path a2 and adjacent red
The intensity level of outside line light path a1, a3, default boundary intensity limit value are contrasted respectively, confirm infrared ray according to comparing result
Whether road a2 is border.
In step s112, determine infrared touch panel under default scanning direction by the infrared ray light path as border
Analog quantity touch area.
Fig. 9 is the structural representation of the default scanning direction Imitating amount touch area according to an exemplary embodiment
Figure.Scanning direction is 90 degree of directions, and infrared ray light path 10 and 20 is two borders of long side direction under this scanning direction, infrared ray
Light path 30 and 40 is two borders of short side direction under this scanning direction, so that it is determined that analog quantity touch area a is infrared ray
Region between road 10 and 20, analog quantity touch area b is the region between infrared ray light path 30 and 40, and then determines analog quantity
Touch area ab is the analog quantity touch area under this 90 degree of scanning directions.
By method as above, under each default scanning direction, meet default in the intensity level of infrared ray light path
In the multiple adjacent infrared ray light path that the intensity level of the requirement of boundary intensity limit value or adjacent infrared ray light path requires, determine as side
The infrared ray light path on boundary, and the analog quantity touch area under this default scanning direction is determined according to border, thus passing through infrared ray
Relative change limit value simulation amount between the absolute bound intensity limit value of light path intensity level and adjacent infrared ray light path touches
The identification in region, it is less or lead to not recognize touch point the problems such as edge is unsmooth to prevent touching object, improves
The accuracy of positioning is touched in infrared touch panel.
Figure 10 is the description of the details to step s111 according to an exemplary embodiment.In step s111, border
Including beginning boundary and termination border, this step s111 may comprise steps of.
In step s1111, infrared touch panel carries out periodic infrared ray according to each default scanning direction successively and sweeps
In retouching, for the infrared ray light path under each default scanning direction, determine that intensity level is less than default boundary intensity limit value, or phase
The intensity level of adjacent infrared ray light path is met with default intensity relatively changing the infrared ray light path that limit value requires is beginning boundary.
Beginning boundary is the sequence of positions according to infrared touch panel middle infrared (Mid-IR) light path, and intensity level meets absolute strength value will
Ask or relative intensity value requirement infrared ray light path.
Intensity level is met with the implementing of infrared ray light path of relative intensity value requirement, can be infrared ray light path and phase
The difference of the intensity level of adjacent infrared ray light path meet default require or infrared ray light path and adjacent infrared ray light path strong
The ratio of angle value meets default requirement, can also be other implementations.
Specifically, according to the sequence of positions of infrared ray light path, checking under default scanning direction in adjacent infrared ray light path is
No infrared ray light path is less than the intensity level of previous infrared ray light path, and the intensity level phase of infrared ray light path and previous infrared ray light path
Default intensity is less than to difference and relatively changes limit value, and the intensity level of infrared ray light path is more than default boundary intensity limit value.
If it has not, then characterize this infrared ray light path being blocked, using this infrared ray light path as beginning boundary；If it has, then not processing,
It is examined in next infrared ray light path.
Figure 11 is the schematic diagram determining beginning boundary in infrared ray light path according to an exemplary embodiment.According to
The sequence of positions of infrared ray light path, because infrared ray light path a1 is in the border of infrared touch panel, only need to check infrared ray light path
Whether the intensity level of a1 is more than default boundary intensity limit value, when infrared ray light path a1 is more than default boundary intensity limit value,
Then infrared ray light path a1 is not beginning boundary, does not process；Then check whether the intensity level of infrared ray light path a2 and previous red
The relative difference of the intensity level of outside line light path a1 is less than default intensity and relatively changes limit value, and the intensity level of infrared ray light path a2
More than default boundary intensity limit value, when for no when, then infrared ray light path a2 is defined as beginning boundary；If it has, then not doing
Process, be examined in next infrared ray light path.
For example, according to the sequence of positions of infrared ray light path in Fig. 7, infrared ray light path a1 is first infrared ray light path, its
Intensity level is respectively 100, and boundary intensity limit value is 60, and it is 25 that intensity changes limit value relatively, due to the intensity of infrared ray light path a1
Value meets the requirement more than default boundary intensity limit value, then by infrared ray light path a1 not as beginning boundary.
Again for example, according to the sequence of positions of infrared ray light path in Fig. 7, adjacent successively infrared ray light path a1, a2, a3 strong
Angle value is respectively 100,95,65, and boundary intensity limit value is 60, and it is 25 that intensity changes limit value relatively, due to infrared ray light path a2
Intensity level meets more than default boundary intensity limit value 60, and the difference of the intensity level of infrared ray light path a2 and infrared ray light path a1 is
5, relatively change limit value 25 less than intensity, then infrared ray light path a2 is not beginning boundary；And the intensity level of infrared ray light path a3 is not
Meet and be more than default boundary intensity limit value 60, and the difference of the intensity level of infrared ray light path a3 and infrared ray light path a2 is 30, greatly
Relatively change limit value 25 in intensity, then infrared ray light path a2 is as beginning boundary.
In step s1112, according to the sequence of positions of infrared ray light path, for as the infrared ray after beginning boundary
Road, determines that intensity level is more than default boundary intensity limit value, or the intensity level of relatively adjacent infrared ray light path meet default strong
The infrared ray light path that degree changes limit value requirement relatively is to terminate border.
After judging as the infrared ray light path of beginning boundary, according to the sequence of positions of infrared ray light path, as initial
Infrared ray light path after border carries out terminating the judgement on border.
Terminate the sequence of positions that border is according to infrared touch panel middle infrared (Mid-IR) light path, intensity level meets absolute strength value will
Ask or relative intensity value requirement infrared ray light path.
Intensity level is met with the implementing of infrared ray light path of relative intensity value requirement, can be infrared ray light path and phase
The difference of the intensity level of adjacent infrared ray light path meet default require or infrared ray light path and adjacent infrared ray light path strong
The ratio of angle value meets default requirement, can also be other implementations.
Specifically, according to the sequence of positions of infrared ray light path, in the infrared ray light path after as beginning boundary, successively
Check whether that infrared ray light path and the difference of the intensity level of previous infrared ray light path are less than the difference of default intensity relative change limit value,
And the intensity level of infrared ray light path is less than default boundary intensity limit value.If NO it is determined that infrared ray light path is to terminate border；
If it has, then not processing, it is examined in next infrared ray light path.
Figure 12 is the schematic diagram determining termination border in infrared ray light path according to an exemplary embodiment.According to
The sequence of positions of infrared ray light path, after as beginning boundary, is examined in infrared ray light path, so that it is determined that as termination side
The infrared ray light path on boundary.Because infrared ray light path a3 is beginning boundary, therefore it is examined in infrared ray light path a4, a5, a6 ...
Whether it is to terminate border.When checking infrared ray light path a4, check whether the intensity level of infrared ray light path a4 and previous infrared ray
The difference of the intensity level of road a3 is less than default intensity and relatively changes limit value, and the intensity level of infrared ray light path a4 is less than in default
Boundary intensity limit value, when for no when, then by infrared ray light path a4 be defined as terminate border；If it has, then not processing, examine successively
Look into next infrared ray light path.
For example, according to the sequence of positions of infrared ray light path in Figure 12, five successively adjacent infrared ray light path a3, a4, a5,
The intensity level of a6, a7 is respectively 65,50,25,45,65, and boundary intensity limit value is 60, and it is 25 that intensity changes limit value relatively, infrared
Linear light road a3 is as beginning boundary.Difference due to the intensity level of infrared ray light path a4 and the intensity level of previous infrared ray light path a3
For -15, relatively change limit value 25 less than intensity, and the intensity level 50 of infrared ray light path a4 is less than boundary intensity limit value 60, therefore,
Infrared ray light path a4 is not as termination border；In the same manner, infrared ray light path a5, a6 is also not as termination border；Due to infrared ray
The difference of the intensity level of the intensity level of road a7 and previous infrared ray light path a6 is 20, relatively changes limit value 25 less than intensity, but infrared
The intensity level 65 of linear light road a7 is more than boundary intensity limit value 60, therefore, using infrared ray light path a7 as termination border.
By method as above, under each default scanning direction, meet default in the intensity level of infrared ray light path
In the multiple adjacent infrared ray light path that the intensity level of the requirement of boundary intensity limit value and adjacent infrared ray light path requires, determine that conduct rises
Determine in the infrared ray light path of initial line circle, and the infrared ray light path after beginning boundary and terminate border, and then determine each side
Downward analog quantity touch area is it is ensured that touch point is in these analog quantity touch areas.
Following for disclosure device embodiment, the touch localization method that can be used for executing this above-mentioned infrared touch panel is implemented
Example.For the details not disclosed in disclosure device embodiment, the touch localization method that refer 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 according to an exemplary embodiment, this dress
Put including but not limited to: touch area determining module 110 and locating module 120.
Touch area determining module 110, is carried out periodically according to each default scanning direction successively for infrared touch panel
Noctovisor scan in, the intensity level according to infrared ray light path adjacent under default scanning direction and default 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.
In the touch positioning device of above-mentioned infrared touch panel, the process of realizing of the function of modules and effect specifically refers to
Correspond to step in the touch localization method of above-mentioned infrared touch panel realizes process, will not be described here.
Optionally, as shown in figure 14, touch area determining module 110 includes but is not limited to: border determination sub-module 111 He
Touch area determination sub-module 112.
Border determination sub-module 111, is carried out periodically according to each default scanning direction successively for infrared touch panel
In noctovisor scan, for the infrared ray light path under each default scanning direction, by infrared ray light path intensity level to adjacent red
The intensity level of outside line light path and default boundary intensity limit value are compared respectively, determine the infrared ray light path as border；
Touch area determination sub-module 112, for determining infrared touch panel pre- by the infrared ray light path as border
If the analog quantity touch area under scanning direction.
Optionally, as shown in figure 15, border determination sub-module 111 includes but is not limited to: beginning boundary determining unit 1111
With termination border determining unit 1112.
Beginning boundary determining unit 1111, is carried out periodically according to each default scanning direction successively for infrared touch panel
Noctovisor scan in, for the infrared ray light path under each default scanning direction, determine that intensity level is less than default border strong
Spend limit value, or the intensity level of relatively adjacent infrared ray light path meets default intensity and relatively changes the infrared ray light path that limit value requires
For beginning boundary；
Terminate border determining unit 1112, for the sequence of positions according to infrared ray light path, for as beginning boundary it
Infrared ray light path afterwards, determines that intensity level is more than default boundary intensity limit value, or the intensity level of relatively adjacent infrared ray light path
Meet default intensity and relatively change the infrared ray light path of limit value requirement for terminating border.
Optionally, as shown in figure 16, beginning boundary determining unit 1111 includes but is not limited to: beginning boundary judgment sub-unit
11111 and beginning boundary determination subelement 11112.
Beginning boundary judgment sub-unit 11111, for the sequence of positions according to infrared ray light path, checks default scanning direction
Under in adjacent infrared ray light path whether infrared ray light path be less than the intensity level of previous infrared ray light path, and infrared ray light path and previous
The intensity level relative difference of infrared ray light path is less than default intensity and relatively changes limit value, and the intensity level of infrared ray light path is more than
Default boundary intensity limit value；
Beginning boundary determination subelement 11112, for if NO it is determined that infrared ray light path is beginning boundary.
Optionally, as shown in figure 17, terminate border determining unit 1112 to include but is not limited to: play termination border and judge that son is single
Unit 11121 and termination border determination subelement 11122.
Terminate border judgment sub-unit 11121, for the sequence of positions according to infrared ray light path, after beginning boundary
In infrared ray light path, the difference being examined in the whether intensity level of infrared ray light path and previous infrared ray light path is less than default intensity
Relatively change the difference of limit value, and the intensity level of infrared ray light path is less than default boundary intensity limit value；
Terminate border determination subelement 11122, for if NO it is determined that infrared ray light path is to terminate border.
It is described above and precision architecture illustrated in the accompanying drawings it should be appreciated that the invention is not limited in, and
And various modifications and changes can executed without departing from the scope.The scope of the present invention only to be limited by appended claim.
Claims (10)
1. a kind of touch localization method of infrared touch panel is it is characterised in that include:
Infrared touch panel is carried out in periodic noctovisor scan according to each default scanning direction successively, is swept according to described presetting
Retouch the intensity level of adjacent infrared ray light path and default boundary intensity limit value under direction, determine the mould under described default scanning direction
Analog quantity touch area；
Analog quantity touch area under each default scanning direction removes terrible point, and positions the touch in described infrared touch panel
Point.
2. method according to claim 1 is it is characterised in that described infrared touch panel is successively according to each default scanning side
To carrying out in periodic noctovisor scan, the intensity level according to infrared ray light path adjacent under described default scanning direction and default
Boundary intensity limit value, determine that the analog quantity touch area step under described default scanning direction includes:
Infrared touch panel is carried out in periodic noctovisor scan according to each default scanning direction successively, presets for each and sweeps
Retouch the infrared ray light path under direction, by described infrared ray light path intensity level to the intensity level of described adjacent infrared ray light path and pre-
If boundary intensity limit value compare respectively, determine as border infrared ray light path；
Simulation under described default scanning direction for the described infrared touch panel is determined by the described infrared ray light path as border
Amount touch area.
3. method according to claim 2 is it is characterised in that described border includes beginning boundary and terminates border, described
Infrared touch panel is carried out in periodic noctovisor scan according to each default scanning direction successively, for each default scanning side
Downward infrared ray light path, by described infrared ray light path intensity level to the intensity level of described adjacent infrared ray light path and default
Boundary intensity limit value is compared respectively, determines that the step as the infrared ray light path on border includes:
Infrared touch panel is carried out in periodic noctovisor scan according to each default scanning direction successively, presets for each and sweeps
Retouch the infrared ray light path under direction, determine that intensity level is less than default boundary intensity limit value, or relatively adjacent infrared ray light path
The infrared ray light path that intensity level meets the change limit value requirement relatively of default intensity is beginning boundary；
According to the sequence of positions of infrared ray light path, for described as the infrared ray light path after beginning boundary, determine intensity level
More than default boundary intensity limit value, or the intensity level of relatively adjacent infrared ray light path meets default intensity and relatively changes limit value
The infrared ray light path requiring is to terminate border.
4. method according to claim 3 is it is characterised in that described infrared touch panel is successively according to each default scanning side
To carrying out in periodic noctovisor scan, for the infrared ray light path under each default scanning direction, determine that intensity level is less than
Default boundary intensity limit value, or the intensity level of relatively adjacent infrared ray light path meets default intensity and relatively changes limit value and require
Infrared ray light path include for beginning boundary step:
According to the sequence of positions of infrared ray light path, check in adjacent infrared ray light path under described default scanning direction whether infrared ray
Light path is less than the intensity level of previous infrared ray light path, and the intensity level phase of described infrared ray light path and described previous infrared ray light path
Default intensity is less than to difference and relatively changes limit value, and the intensity level of described infrared ray light path is more than default boundary intensity limit
Value；
If NO it is determined that described infrared ray light path is beginning boundary.
5. method according to claim 3 is it is characterised in that the described sequence of positions according to infrared ray light path, for institute
Infrared ray light path after stating as beginning boundary, determines that intensity level is more than default boundary intensity limit value, or relatively adjacent red
It is to terminate the step bag on border that the intensity level of outside line light path meets the default intensity infrared ray light path that change limit value requires relatively
Include:
According to the sequence of positions of infrared ray light path, in the infrared ray light path after described beginning boundary, whether red it is examined in
Outside line light path is less than the difference of default intensity relative change limit value with the difference of the intensity level of previous infrared ray light path, and described infrared
The intensity level on linear light road is less than default boundary intensity limit value；
If NO it is determined that described infrared ray light path is to terminate border.
6. a kind of touch positioning device of infrared touch panel is it is characterised in that include:
Touch area determining module, carries out periodic infrared ray according to each default scanning direction successively for infrared touch panel
In scanning, the intensity level according to infrared ray light path adjacent under described default scanning direction and default boundary intensity limit value, determine
Analog quantity touch area under described 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.
7. device according to claim 6 is it is characterised in that described touch area determining module includes:
Border determination sub-module, carries out periodic infrared ray according to each default scanning direction successively for infrared touch panel and sweeps
In retouching, for the infrared ray light path under each default scanning direction, by described infrared ray light path intensity level to described adjacent red
The intensity level of outside line light path and default boundary intensity limit value are compared respectively, determine the infrared ray light path as border；
Touch area determination sub-module, for determining described infrared touch panel in institute by the described infrared ray light path as border
State the analog quantity touch area under default scanning direction.
8. device according to claim 7 is it is characterised in that described border determination sub-module includes:
Beginning boundary determining unit, carries out periodic infrared ray according to each default scanning direction successively for infrared touch panel
In scanning, for the infrared ray light path under each default scanning direction, determine that intensity level is less than default boundary intensity limit value, or
It has been initial line that the intensity level of relatively adjacent infrared ray light path meets the default intensity infrared ray light path that change limit value requires relatively
Boundary；
Terminate border determining unit, for the sequence of positions according to infrared ray light path, for described as beginning boundary after
Infrared ray light path, determines that intensity level is more than default boundary intensity limit value, or the intensity level of relatively adjacent infrared ray light path meets
The infrared ray light path that default intensity changes limit value requirement relatively is to terminate border.
9. device according to claim 8 is it is characterised in that described beginning boundary determining unit includes:
Beginning boundary judgment sub-unit, for the sequence of positions according to infrared ray light path, checks phase under described default scanning direction
In adjacent infrared ray light path, infrared ray light path is less than the intensity level of previous infrared ray light path, and described infrared ray light path and described
The intensity level relative difference of previous infrared ray light path is less than default intensity and relatively changes limit value, and described infrared ray light path is strong
Angle value is more than default boundary intensity limit value；
Beginning boundary determination subelement, for if NO it is determined that described infrared ray light path is beginning boundary.
10. device according to claim 8 is it is characterised in that described termination border determining unit includes:
Terminate border judgment sub-unit, for the sequence of positions according to infrared ray light path, infrared after described beginning boundary
In linear light road, it is examined in whether infrared ray light path is relative less than default intensity with the difference of the intensity level of previous infrared ray light path
The difference of change limit value, and the intensity level of described infrared ray light path is less than default boundary intensity limit value；
Terminate border determination subelement, for if NO it is determined that described infrared ray light path is to terminate border.
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