CN106055177A - Scanning method and device of infrared touch screen - Google Patents
Scanning method and device of infrared touch screen Download PDFInfo
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- CN106055177A CN106055177A CN201610524040.5A CN201610524040A CN106055177A CN 106055177 A CN106055177 A CN 106055177A CN 201610524040 A CN201610524040 A CN 201610524040A CN 106055177 A CN106055177 A CN 106055177A
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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
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Abstract
The embodiment of the invention discloses a scanning method and device of an infrared touch screen. The scanning method presets a plurality of scanning rules, the movement information of a current touch point is determined through the position information of the current touch point in a current scanning period and a previous scanning period, so that the scanning rule activated in a next scanning period is selected, and the next scanning period is begun to continue screen scanning after the selected scanning rule is activated. Through the application of the technical scheme which is put forward by the embodiment of the invention, the movement information of the current touch point is analyzed to determine the state of the current touch point, the more proper scanning rule is switched by aiming at different scenes, problems of lost points and broken lines can be reduced even under a scene of dynamic multi-point touch, and therefore, a purpose that the accuracy of touch control and user experience are improved is achieved.
Description
Technical field
The application relates to touch control field, particularly to scan method and the device of a kind of infrared touch panel.
Background technology
Touch screen (touch screen) is also called " touch screen ", " contact panel ", is one and can detect in display
The existence touched in region and the electronic system of position, simplify man-machine interaction method.Touch screen is distinguished from know-why, can
It is divided into five basic kind: infrared technology touch screen, vector pressure sensing technology touch screen, resistive technologies touch screen, electric capacity
Technology touch screen, surface acoustic wave technique touch screen.
In current touch technology, infrared technology touch screen (Infrared Touch Screen Technology) has
The advantages such as it is more that environmental suitability is strong, the life-span is longer, recognizable touch is counted.Infrared technology touch screen is by being contained in touch screen
Infrared emitting and receiving sensing element on housing is constituted, and outward appearance is a rectangular configuration, in screen surface, is formed infrared
Line detection network, any touching object can change the infrared ray on contact and realize touch screen operation.
As it is shown in figure 1, be the structural representation of a kind of infrared technology touch screen of the prior art, it is by a long limit
Transmitting side, a long receiving while, minor face transmitting side, a short receiving while composition.Transmitting side has some transmittings
Lamp, to there being some reception lamps on correspondingly received limit, generally uses 1 to be scanned multimode, and i.e. one emission lamp luminescence is right
Face multiple reception lamp receives simultaneously, is consequently formed light net, judges according to light net different shape in the case of touching and not touching
Touch behavior.
Existing infrared touch panel is in rectangular configuration, and traditional infrared point location algorithm is just being swept in direction according to long minor face and hidden
Being in the light, road is orthogonal obtains touch point, therefore, can normally work during single-touch；During multiple point touching, orthogonal obtain count many
In counting of true contact, needing to carry out true and false judgement (referred to as removing ghost point), otherwise, system can be made mistakes.
For the problems referred to above existing under multiple point touching scene, existing processing method have time-sharing approach, zone method and
Logic method of elimination.
Applicant finds during realizing the application, and above-mentioned existing processing scheme at least exists following problem:
Time-sharing approach: assuming that multiple point touching is successively event, each moment only one of which point touches, but for
Multiple contacts touch helpless simultaneously.
Zone method: touch screen is divided into multiple little region, each region only allows a touch point to touch, but so
Reduce the resolution of touch screen.
Logic method of elimination: be better than time-sharing approach and zone method, but also have the biggest defect.In order to avoid light interference and power consumption limit
System, many light paths of infrared touch panel are different for sweep time, and the most at a time only one of which emission lamp is luminous.At this moment contact is moved
Time the light network data that scans be band error, this phenomenon is called time delay error, as in figure 2 it is shown, be logic of the prior art
The principle schematic of the time delay error that method of elimination is caused, minor face scanning monitors position a little, and when scanning on long limit, contact can
Can move, the most in situ.A position is just asked for and goes ghost point to bring the biggest impact by this.
As can be seen here, conventional point location algorithm can not be lost a little and asking of breaking in the touch effectively solved under multiple point touching scene
Topic, has had a strong impact on accuracy and the Consumer's Experience of touch control.
Summary of the invention
The embodiment of the present application provides scan method and the device of a kind of infrared touch panel, to realize cutting for different scenes
Change more adaptive scanning rule, improve accuracy and the purpose of Consumer's Experience of touch control, even if touching at dynamic multipoint
Scene under, it is also possible to reduce the problem that occurs losing a little and breaking.
In order to reach above-mentioned technical purpose, this application provides the scan method of a kind of infrared touch panel, be applied to preset
In the infrared touch screen of multiple scanning rule, described method specifically includes:
In present scanning cycle, carry out screen scanning according to the currently active scanning rule；
The result of statistical screens scanning, determines the positional information of current touch point；
Positional information according to described current touch point and described current touch point position within a upper scan period
Information, determines the movable information of described current touch point；
According to the movable information of described current touch point, in default described multiple scanning rule, the next one is selected to sweep
The scanning rule activated in retouching the cycle；
Scanning rule selected by activation, starts the next scan period.
Preferably, in the described infrared touch screen having preset multiple scanning rule, specifically include a kind of default scan regular:
When described infrared touch screen starts, activate described default scan rule, and start first scan period.
Preferably, the described movable information according to described current touch point, in default described multiple scanning rule, choosing
The scanning rule activated in selecting the next scan period, specifically includes:
When the movable information according to described current touch point, determine the touch point that current touch point is a high-speed motion
Time, in default described multiple scanning rule, select that there is less scanning optical path number, and in the length of described infrared touch screen
The scanning rule of minor face equal only one of which scanning direction, as the scanning rule activated in the next scan period；
When the movable information according to described current touch point, determine the touch point that current touch point is multiple high-speed motion
Time, in default described multiple scanning rule, select that there is less scanning optical path number, and in the length of described infrared touch screen
Minor face the most at least includes the scanning rule of two scanning directions, as the scanning rule activated in the next scan period；
When the movable information according to described current touch point, determine that current touch point is static or the touch point of low-speed motion
Time, in default described multiple scanning rule, select the scanning rule with more scanning optical path number, sweep as the next one
The scanning rule activated in retouching the cycle.
Preferably, described in present scanning cycle, after carrying out screen scanning according to the currently active scanning rule, also
Including:
When the result of statistical screens scanning, and determine when there is currently no touch point, keep the currently active scanning rule,
Start the next scan period；Or,
When the result of statistical screens scanning, and determine when there is currently no touch point, activate described default scan rule, open
Begin the next scan period.
Preferably, the result of described statistical screens scanning, after determining the positional information of current touch point, also include:
When judging that described current touch point did not exist the positional information in the upper scan period, keep the currently active
Scanning rule, starts the next scan period.
It addition, the embodiment of the present application additionally provides a kind of infrared touch panel, specifically include:
Rules administration module, is used for presetting multiple scanning rule；
Scan module, in present scanning cycle, according to sweeping in the currently active described rules administration module
Retouch rule and carry out screen scanning；
Positional information determines module, for adding up the described scan module result to screen scanning, determines current touch point
Positional information；
Movable information determines module, for determining the position of current touch point determined by module according to described positional information
Information and described current touch point positional information within a upper scan period, determine the motion letter of described current touch point
Breath；
Select module, for determining the motion letter of described current touch point determined by module according to described movable information
Breath, in the described multiple scanning rule that described rules administration module is preset, that is activated in selecting the next scan period sweeps
Retouch rule；
Active module, for activating the scanning rule selected by described selection module, and notifies that described scan module starts
The next scan period.
Preferably, in the described infrared touch screen having preset multiple scanning rule, specifically include a kind of default scan regular:
Described active module, is additionally operable to when described infrared touch screen starts, and activates writing from memory in described rules administration module
Recognize scanning rule, and notify that described scan module starts first scan period.
Preferably, described selection module, specifically for:
When determining the movable information of described current touch point determined by module according to described movable information, determine current touching
Touch when being some the touch point of a high-speed motion, in the described multiple scanning rule that described rules administration module is preset, select
There is less scanning optical path number, and the scanning rule of the long minor face equal only one of which scanning direction at described infrared touch screen,
As the scanning rule activated in the next scan period；
When determining the movable information of described current touch point determined by module according to described movable information, determine current touching
When touching a little for the touch point of multiple high-speed motions, in the described multiple scanning rule that described rules administration module is preset, select
There is less scanning optical path number, and the most at least include the scanning rule of two scanning directions at the long minor face of described infrared touch screen
Then, as the scanning rule activated in the next scan period；
When determining the movable information of described current touch point determined by module according to described movable information, determine current touching
Touch a little touch point for static or low-speed motion time, in the described multiple scanning rule that described rules administration module is preset, choosing
Select the scanning rule with more scanning optical path number, as the scanning rule activated in the next scan period.
Preferably, described active module, it is additionally operable to:
When described positional information determines that module adds up the described scan module result to screen scanning, and determine and currently do not deposit
When touch point, keep the scanning rule in the currently active described rules administration module, and start the next scan period；
Or,
When described positional information determines that module adds up the described scan module result to screen scanning, and determine and currently do not deposit
When touch point, activate the described default scan rule in described rules administration module, and start the next scan period.
Preferably, described active module, it is additionally operable to:
When described movable information determines that module judges that described current touch point did not exist the position in the upper scan period
During information, keep the scanning rule in the currently active described rules administration module, and notify that described scan module starts next
The individual scan period.
Compared with prior art, the Advantageous Effects of the technical scheme that the embodiment of the present application is proposed includes:
The embodiment of the present application discloses scan method and the device of a kind of infrared touch panel, and this scan method has been preset multiple
Scanning rule, by current touch point in present scanning cycle and on positional information in a scan period, determine and deserve
The movable information of front touch point, the scanning rule activated in selecting the next scan period accordingly, and selected by activation
After scanning rule, start next scan period continuation screen scanning, the technical side proposed by application the embodiment of the present application
Case, can determine the state of current touch point by analyzing the movable information of current touch point, switch more for different scenes
Add the scanning rule of adaptation, even if under the scene that dynamic multipoint touches, it is also possible to reduce the problem occurring losing a little and breaking, reach
To the accuracy and the purpose of Consumer's Experience that improve touch control.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the application, the required accompanying drawing used in embodiment being described below
It is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the application, general for this area
From the point of view of logical technical staff, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of infrared technology touch screen of the prior art；
The principle schematic of the time delay error that Fig. 2 is caused by logic method of elimination of the prior art；
Fig. 3 is the structural representation of a kind of infrared touch panel that the embodiment of the present application proposes；
The schematic flow sheet of the scan method of a kind of infrared touch panel that Fig. 4 is proposed by the embodiment of the present application；
The stream of the scan method of the infrared touch panel under a kind of concrete application scenarios that Fig. 5 is proposed by the embodiment of the present application
Journey schematic diagram；
Fig. 6 A is a kind of 1 on a scanning direction corresponding to limit long under the scanning rule of 2 in concrete application scenarios
Parallel light path schematic diagram；
Fig. 6 B is a kind of 1 on another scanning direction corresponding to limit long under the scanning rule of 2 in concrete application scenarios
Parallel light path schematic diagram；
Fig. 7 A, Fig. 7 B, Fig. 7 C and Fig. 7 D be respectively four kinds that the embodiment of the present application proposed under concrete application scenarios red
The schematic diagram of the scanning rule of outer touch screen；
The structural representation of a kind of infrared touch panel that Fig. 8 is proposed by the embodiment of the present application.
Detailed description of the invention
As the application background technology is stated, under multiple point touching controls scene, lose a little to reduce and break, need
Rate of scanning to be improved, reduces scanning optical path number, and in order to improve scanning accuracy, it is achieved accurately control, need again to increase scanning
Light way, the demand of scanning rule is runed counter to by both, cannot realize taking into account in existing infrared touch panel scanning technique.
Present inventor wishes by method provided herein, it is possible to achieve switch more for different scenes
Add the scanning rule of adaptation, to realize preferably scanning effect.Even if under the scene that dynamic multipoint touches, it is also possible to reduce and
The problem now lost a little and break, improves accuracy and the Consumer's Experience of touch control.
Being described for convenience, the embodiment of the present application gives and realizes a kind of particular hardware structure of the technical program and show
Example.As it is shown on figure 3, the structural representation of a kind of infrared touch panel proposed for the embodiment of the present application.
In infrared scan screen 300, MCU301 is used for managing and selecting scanning rule, and is processed by corresponding scanning rule
Scheme is sent to launch scanning circuit 302 and receive scanning circuit 303.Launch scanning circuit 302 and control infrared transmitting tube matrix
304 carry out infrared emitting according to corresponding scanning rule, receive scanning circuit 303 control infrared receiving tube matrix 305 according to
Corresponding infrared ray received by scanning rule identification, and corresponding reception condition is fed back to sample circuit 306.Sampling electricity
Road 306, by meeting the infrared ray received to contrast with the ultrared situation being an actually-received according to scanning rule, is identified
Touch area, and corresponding recognition result is fed back to MCU301.MCU301 changes according to the historical information of touch area, analyzes
The kinestate of touch area, and select the scanning rule matched, thus be sent to accordingly with more suitably scanning rule
Circuit carry out follow up scan process.Further, MCU301 is controlled and receives MCU301 feedback by primary processor 307
Touch information, thus the operational order corresponding to touch operation is made corresponding process.
In actual application, the process function of 307 and MCU301 two unit of primary processor is desirably integrated into a thing
Reason unit realizes, and, corresponding function treatment can also be come integrated with the hardware in terminal unit, hard with compression further
Part scale, it is achieved hardware simplicity, especially, can make the hardware configuration of single infrared touch panel simplify further, it is achieved more
Good hardware is simplified, lightening.
It should be noted that above-mentioned hardware configuration be intended merely to facilitate the follow-up explanation of the embodiment of the present application and be given one
Kind of preferred embodiment, in actual applications, corresponding hardware cell can be integrated merging or decomposes further, can be real
On the basis of existing constructed effect, the change that concrete hardware cell is disposed can't affect the protection domain of the application.
As shown in Figure 4, the schematic flow sheet of the scan method of a kind of infrared touch panel proposed by the embodiment of the present application,
The method is applied to have preset in the infrared touch screen of multiple scanning rule, and corresponding infrared touching screen structure is with aforementioned Fig. 2 institute
Being specifically described as a example by the structure be given, the method specifically includes:
Step S401, in present scanning cycle, carry out screen scanning according to the currently active scanning rule.
Implementing of this step can be processed by aforesaid transmitting scanning circuit 302 and reception scanning circuit 303,
Two kinds of circuit control infrared transmitting tube matrix 304 and infrared receiving tube matrix 305, the scanning rule activated according to MCU301 respectively
Then carry out infrared emitting and reception, thus, it is achieved screen scanning.
This step is directly performed after present scanning cycle starts, i.e. MCU301 selects to activate corresponding scanning rule
After, i.e. proceed by the process of this step.The length of scan period can be according to the needs of hardware condition He actual application scenarios
Being configured, such change can't affect the protection domain of the application.
As it was previously stated, preset multiple scanning rule in current infrared touch screen, in concrete application scenarios, multiple sweep
Retouching rule to be managed by MCU301, corresponding scanning rule content of presetting can be sent to MCU301 by primary processor 307.
Such multiple scanning rule is in order to tackle different application scenarios and to prepare.Concrete scanning rule feature is follow-up
Process in step and can be further described in conjunction with concrete application scenarios, do not repeat them here.
In actual application scenarios, for the realization of initialization operation, need to select in above-mentioned multiple scanning rule
Select a scanning rule by default.When described infrared touch screen starts, need to activate this default scan rule, and start the
The scan process of one scan period.
Concrete, the selection of default scan rule can be configured according to actual needs, the change of specifically chosen content
The protection domain of the application can't be affected.
But, it is contemplated that the touch scene of original state is unknown, in order to take into account the scanning effect of each scene, and this acquiescence
Scanning rule can select that there is sweeping of moderate scanning optical path quantity and rate of scanning in default multiple scanning rules
Retouch rule, even if it is at single-point and multi-point touch, and at a high speed with under low speed scene, can possess certain scanning accuracy,
Do not appear in, under a kind of scene, there is higher accuracy, the situation of then serious misalignment under contrary scene.
On the other hand, after this step has performed, according to corresponding screen scanning result, in fact it could happen that two kinds of feelings
Condition:
Situation one, captured current touch operation by scanning, i.e. there is current touch point, then perform step
S402。
Situation two, it is not capture any touch operation, thus, determine and there is currently no touch point, in this feelings
Under condition, can there be two kinds of processing schemes:
Option A, without adjusting Current Scan state, keep the currently active scanning rule, start the next scan period
Scan process.Such processing scheme can keep the continuity of touch operation, i.e. for adjacent touch operation type phase
Near situation, can have and preferably scan accuracy.
Option b, activate described default scan rule, start the scan process of next scan period.Such process side
Case can take into account the touch operation under different scene, i.e. after a touch operation, scanning mode is recovered initial, so,
No matter touch operation next time and the feature similarity that preceding touch operates or contrary, can ensure that a certain degree of scanning is known
Other accuracy.
In actual applications, when the scanning rule for activating in present scanning cycle is exactly default scan rule
Under, above-mentioned option A is consistent with the content of option b.
Above-mentioned option A and option b each have certain advantage and a defect, in actual applications, and can be as required
Carrying out selecting to arrange, such change can't affect the protection domain of the application.
The result of step S402, statistical screens scanning, determines the positional information of current touch point.
Implementing of this step can be processed by aforesaid sample circuit 306, and sample circuit 306 will be according to scanning
Rule meets the infrared ray received and the ultrared situation being an actually-received contrasts, and identifies touch area, is and works as
The positional information of front touch point.
After this step has performed, recognition result is fed back to MCU301, according to current touch point by sample circuit 306
Go whether inquiry deposited the positional information of touch point in this prior in a upper scan period further, according to Query Result, can
Two kinds of situations can occur:
Situation one, inquire this current touch point and there is the positional information in the scan period, i.e. deposit in this prior
The historical position information record of touch point, then perform step S403.
Situation two, inquiry less than this current touch point positional information within a upper scan period, thus, it is judged that deserve
There is not the positional information in the scan period in front touch point, so, keep the currently active scanning rule, start next
The scan operation of individual scan period.
Why keep the currently active scanning rule, primarily within the next scan period, can be with equally
Scanning rule get the positional information of this current touch point, be that both have identical information criterion of identification, thus keep
The continuity of identification information, improves the accuracy of recognition result.
It should be noted that for inquiry less than this current touch point positional information within a upper scan period, can
Can be because the current scan period is exactly that infrared touch panel starts or first scan period after being reactivated, and does not deposits
In a upper scan period；It was also likely to be within a upper scan period, the operation that current touch point is not corresponding, even root
This does not just have touch operation, the most above-mentioned that situation, and its result is all to cause current touch point not have historied position to believe
Breath it is therefore desirable to continue to obtain positional information in the next scan period, can analyze the motion of current touch point for reference
State.
Step S403, according to the positional information of described current touch point and described current touch point in a upper scan period
Interior positional information, determines the movable information of described current touch point.
Implementing of this step can be stored historical touch control by aforesaid MCU301 process in MCU301
Information, after the no historical position information being fitted on current touch point, determines current touch according to two or more positional informationes
The movable information of point.It should be noted that in order to realize function singleness, such analyzing and processing can also be by primary processor
307 complete, and MCU301 is only responsible for the management of scanning rule and calls activation, and such change can't affect the guarantor of the application
Protect scope.
In actual application scenarios, in order to realize kinestate result more accurately, the embodiment of the present application is proposed
Technical scheme can remove to obtain the position letter of this current touch point in the most upwards cycle or more multicycle further
Breath, thus, it is achieved the analysis of movable information more accurately.
It should be noted that movable information mentioned in this step, including the position coordinates, current of this current touch point
One or more in the information such as speed, acceleration, every information that may be used for touch point moving state identification can be answered
Using in this step, such change can't affect the protection domain of the application.
Step S404, movable information according to described current touch point, in default described multiple scanning rule, select
The scanning rule activated in the next scan period.
What this step belonged to scanning rule calls management, and implementing can be by aforesaid MCU301 process.
In view of the needs of plurality of application scenes, the technical scheme that the embodiment of the present application is proposed has penetrated multiple scanning finally
Rule, for convenience of explanation, for following plurality of application scenes, according to the processing mode of this step illustrate respectively as
Under:
Scene one, when the movable information according to described current touch point, determine that current touch point is a high-speed motion
During touch point, in default described multiple scanning rule, select that there is less scanning optical path number, and at described infrared touch-control
The scanning rule of the long minor face equal only one of which scanning direction of screen, as the scanning rule activated in the next scan period.
Such processing scheme can activate the scanning rule with higher rate of scanning, improves the knowledge of the single touch point of high-speed motion
Do not spend, reduce and be delayed error, and, single scanning direction enough meets the needs that single locus catches, and improves rate of scanning
Resource consumption can also be reduced simultaneously.
Scene two, when the movable information according to described current touch point, determine that current touch point is multiple high-speed motion
During touch point, in default described multiple scanning rule, select that there is less scanning optical path number, and at described infrared touch-control
The long minor face of screen the most at least includes the scanning rule of two scanning directions, as the scanning rule activated in the next scan period
Then.Such processing scheme can activate the scanning rule with higher rate of scanning, improves multiple touch points of high-speed motion
Resolution, reduce and be delayed error, and, the most individual scanning direction enough meets the needs of multiple spot position capture, reduces and loses a little
And broken string.
Scene three, when the movable information according to described current touch point, determine that current touch point is static or low-speed motion
Touch point time, in default described multiple scanning rule, select to have the scanning rule of more scanning optical path number, as
The scanning rule activated in the next scan period.Such processing scheme can activate the scanning rule with more scanning optical path
Then, improve the precision of screen surface sweeping, improve the accuracy of touch control.
Three above-mentioned application scenarios are the concrete example given by the embodiment of the present application, for other applied field
Scape, equally takes the scheme being similar to, and reaches more preferable screen scanning effect, it is achieved touch control operation more accurately.
It should be noted that in above-mentioned each scene, can not the selection of only one of which scanning rule, such as, for field
Scape two, if the scanning optical path number of the currently active scanning rule is N, then determine that current touch point is at present scanning cycle
During the touch point of multiple high-speed motions, can specifically identify the velocity amplitude of this current touch point, if velocity amplitude is not above pre-
If superelevation threshold value, then select activate scanning optical path number be the scanning rule of N/2, and if velocity amplitude higher than preset superelevation threshold
Value, then selecting to activate scanning optical path number is the scanning rule of N/3, have selected less scanning optical path number the most further, reaches more
High rate of scanning, to adapt to higher touch point translational speed.Certainly, alternative scanning rule can be not only two,
Can also be three the most, and the situation under other scenes equally uses similar process, it is achieved more accurate
Grading control.Such change can't affect the protection domain of the application.
Scanning rule selected by step S405, activation, starts the next scan period.
Implementing of this step can be launched scanning circuit 302 with aforesaid MCU301 and receive scanning circuit
303 complete, MCU301 determine need activate scanning rule, or receive primary processor 307 send activation certain sweep
After retouching the instruction of rule, send corresponding scanning rule or scanning rule to launching scanning circuit 302 with receiving scanning circuit 303
Then corresponding concrete transmitting and the scheme of reception, thus proceed to step S401 is carried out the circular treatment of next scan period.
This step i.e. returns after completing and restarts the new scan period, restarts following of step S401～step S405
Ring, constantly adjusts scanning rule according to current application scenarios change, it is achieved the self-adaptative adjustment of scanning rule, reaches more preferable
Touch control accuracy.
Compared with prior art, the Advantageous Effects of the technical scheme that the embodiment of the present application is proposed includes:
The embodiment of the present application discloses scan method and the device of a kind of infrared touch panel, and this scan method has been preset multiple
Scanning rule, by current touch point in present scanning cycle and on positional information in a scan period, determine and deserve
The movable information of front touch point, the scanning rule activated in selecting the next scan period accordingly, and selected by activation
After scanning rule, start next scan period continuation screen scanning, the technical side proposed by application the embodiment of the present application
Case, can determine the state of current touch point by analyzing the movable information of current touch point, switch more for different scenes
Add the scanning rule of adaptation, even if under the scene that dynamic multipoint touches, it is also possible to reduce the problem occurring losing a little and breaking, reach
To the accuracy and the purpose of Consumer's Experience that improve touch control.
Below in conjunction with the accompanying drawing in the application, the technical scheme in the application is carried out clear, complete description, aobvious
So, described embodiment is a part of embodiment of the application rather than whole embodiments.Based on the enforcement in the application
Example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of not making creative work, all belong to
Scope in the application protection.
As previously shown, existing infrared touch panel scanning technique uses the scanning of multi-direction light path (just clearing off road and tiltedly clearing off
Road), set a kind of scanning rule when initializing, periodically multi-direction many light paths are swept successively according to this scanning rule
Retouch.
But needing in the face of two problems in actual applications, first, the difference of all directions sweep times causes contact to be moved
Time the light network data that scans be band error, show as losing some during rapid movement.
On the other hand, owing to there is contradictory relation, in order to reduce time delay between light path scanning number and some precision, some discrimination
Impact, improve motion time point discrimination, need to reduce scanning optical path number as far as possible, and put precision require increase scanning light
Way.Therefore, in the face of unknown touch point state, or during the changeable application scenarios of touch point state, tend not to take into account.
Tradition scan mode is in order to solve this problem, it will usually find the scanning rule of a compromise, but, thus
Bring two defects:
1, during low-speed motion, touching object point precision is the highest, affects touch control degree of accuracy.
2, during high-speed motion, some discrimination is the highest, occurs losing a little and broken string.
In order to solve above-mentioned technical problem, patent No. CN 102053757A discloses a kind of multiple spot based on analog image
Targeting scheme, the principle of the program is: first, carries out the axle scanning of multiple angle, and then, countershaft scanning initial data was through the past
After processing except volume of data such as ambient light, data normalization, generate the axle touch information of logic, generate according to these information and work as
The luminance graph of front frame, by touching the comparison of luminance graph with theory, identifies multiple effective touch area, re-uses image
Tracing algorithm, the final event exporting multiple point touching.But due to the impact of delay problem, in the motor process of contact, present frame
The virtual condition of luminance graph and present frame there will be bigger error, thus, in the comparison process touching luminance graph with theory,
The phenomenon that easily appearance point disappears.
The embodiment of the present application, in order to solve above-mentioned problem of the prior art, reduces appeared in CN 102053757A simultaneously
Similar time delay error and some disappearance problem, it is proposed that in infrared touch panel, preset different scanning rules, further according to institute
The historical movement information of the current touch point of record, adjusts the technical scheme of the scanning rule of current application in real time, makes infrared touching
Touch screen and be in optimal mode of operation all the time, solve and lose point, disconnected caused by the scanning delay when rapid movement of the touch point
The problems such as line, and the problem that scanning element precision that touch point is when low-speed motion is the highest, improve Consumer's Experience and touch control
Accuracy.
As it is shown in figure 5, the scanning of the infrared touch panel under a kind of concrete application scenarios proposed by the embodiment of the present application
The schematic flow sheet of method, the method specifically includes:
Step S501, in infrared touch panel preset multiple scanning rule, and therefrom determine default scan rule.
In actual applications, this step also needs to arrange the scan period, in general, when the scan period includes two parts
Between: being first under Current Scan rule, the whole scanning optical paths on all scanning directions are fully completed required for single pass
Time, next to that complete the time of the follow-up scanning rule selection course of the technical program, the summation of this two parts time is just
It is length basic time of scan period.
Being fixing owing to single emission lamp performs the time of a scanning optical path, the scan period is concrete with scanning rule
The scanning optical path quantity arranged is corresponding relevant, and the time span difference completing subsequent treatment is the most small, so, can recognize
Corresponding scan period information, under such application scenarios, different scanning light path is contained for correspondence actual in scanning rule
Quantity, different scan period length that the most different scanning rules is corresponding.Such it is advantageous in that adjacent twice sweep
The process of retouching with slitless connection, can not have the interval of sky window time, accordingly, occurs that the probability of time delay is the most just greatly lowered,
Can accomplish to obtain touch point information in real time, not have problems such as losing point, breakpoint.
Certainly, in actual applications, in order to ensure that the regularization of scan operation is carried out, it is also possible to arrange unified scanning week
Phase, comprise the scanning rule of most scanning optical path number as standard with satisfied.When performing other scanning rules, comprise a number of
The empty window phase, in the case of the empty window phase is less than certain numerical value, the time elongatedness that the i.e. empty window phase is caused is less than certain numerical value, will not
In the case of affecting the data accuracy of touch point, such scan period set-up mode also can be employed.So
Application scenarios under, different scanning light path quantity, identical scan period length that the most different scanning rule is corresponding.This
Scan period in every kind of scanning rule is unified by the set-up mode of sample, can avoid frequently changing scan period data institute
The system resources consumption caused, meanwhile, is also convenient for statistics scanning times within the unit interval and data volume, keeps system to process
The steady use of resource, processes the operation fluctuation of resource in not havinging the unit interval caused due to scan period change,
The even running of holding system.
In actual applications, can select the scan period scheme being suitable for according to concrete needs, which kind of is swept in concrete employing
Retouch cycle regimen, the protection domain of the application can't be affected.
In the technical scheme that the embodiment of the present application is proposed, scan under different motion state for touch point and need with algorithm
The contact asked, has preset scanning rule flexibly, and the content that each scanning rule is configured includes that scanning direction number n and each of which are swept
Retouch the angle in direction.
Wherein, the concrete meaning of scanning direction is as follows:
In 1 couple of n (n >=1) scan mode, for particular lamp, every light path has different angles；For one
Particular transmission lamp, in its corresponding n bar light path, the angle that every light path is had is a scanning direction.Therefore, the 1 couple of n
Scanning rule will include n scanning direction.
In concrete application scenarios, each scanning direction is formed with the parallel light path of slope by one group, such as Fig. 6 A and
Shown in Fig. 6 B, in the most concrete application scenarios, a kind of 1 under the scanning rule of 2, on 2 scanning directions corresponding to long limit
Parallel light path schematic diagram.
For convenience of explanation, the technical scheme that the embodiment of the present application is proposed gives following four scanning rule, as
Shown in Fig. 7 A, Fig. 7 B, Fig. 7 C and Fig. 7 D, respectively proposed under concrete application scenarios four kinds infrared of the embodiment of the present application touch
Touch the schematic diagram of the scanning rule of screen, for convenience, each schematic diagram simply respectively gives respectively in long limit and minor face
The signal circuit of a scanning optical path on each scanning direction.
Wherein, the scanning rule one gone out given in Fig. 7 A is 1 scanning rule to 3, the scanning rule gone out given in Fig. 7 B
Two is 1 scanning rule to 1, and the scanning rule three gone out given in Fig. 7 C is 1 scanning rule to 2, and go out given in Fig. 7 D sweeps
Retouching rule four is 1 scanning rule to 9.
In the technical scheme that the present embodiment is proposed, owing to scanning rule one has moderate scanning optical path number, permissible
Take into account the touch point of height and low-speed motion, so, scanning rule one is set for default scan rule.
Certainly, in actual application scenarios, the scanning rule preset is not limited only to scanning rule given above
Quantity and content, on the premise of the scanning demand that disclosure satisfy that different touch points kinestate, concrete scanning rule content and
The change presetting scanning rule quantity can't affect the protection domain of the application.
Step S502, infrared touch panel start, and activate default scan rule.
In the case of dormancy, also can stop current surface sweeping in view of infrared touch panel to process, so, startup here can
To refer to initial start, it is also possible to be that infrared touch panel is waken up activation in the case of dormancy.Start successfully at infrared touch panel
After, activate the default scan rule arranged in step S501.
Step S503, start the new scan period, perform screen scanning operation according to the currently active scanning rule.
In actual application scenarios, the scan operation in this step can be full screen scanning, can also be tracking sweeps
Retouch, parallel scan scan mode, such change can't affect the protection domain of the application.
The result of step S504, statistical screens scanning.
Add up all region that is blocked (touch area) coordinates on each scanning direction on long limit and minor face the most respectively,
Until all of scanning direction is the most processed on long limit and minor face.In concrete statistic processes, long limit and minor face, and same
Each scanning direction on bar limit does not has the sequencing requirement of certainty, as long as being sequentially completed all of scan statistics.
It is blocked owing to the region that is blocked there will be the infrared ray that emission lamp sent, it is impossible to be transmitted into the reception lamp of correspondence
Situation.Therefore, each reception lamp infrared receiver situation in all directions scanning period is directly added up, it is possible to determine and be blocked
Scanning optical path position, and then the edge coordinate in the region that obtains being blocked.This step completes the statistics of scan data the most accordingly
Process.
Step S505, judge whether region (touch area) coordinate that is effectively blocked.
If it is judged that be yes, then perform step S506；
If it is judged that be no, then perform step S511.
It should be noted that in actual applications, in order to improve scanning accuracy, the execution of this step also needs to include
Operation except interference information.I.e. avoid because extraneous shadow electromagnetic change, or the improper touch objects such as dust chip is caused
Interference information, and obvious irrational occlusion area information.The most just can be effectively blocked region (touch
Region) coordinate, do not repeat them here.
Step S506, collecting statistical data, algorithm adds up the region being blocked, and determines current touch point according to occlusion area
Positional information.
Step S507, positional information according to the current touch point of this frame (present scanning cycle), inquire about current touch point
Whether history of existence positional information in historical frames (upper or front several scan period).
If it does, perform step S508；
If it does not, perform step S512.
The process of this step depends on finds the touch information corresponding to current touch point in historical frames information, and this needs
The trend changing track reasonability and touch location is analyzed to determine, in the prior art, has the solution of maturation
Scheme.In actual applications, every technical scheme that can arrive identification corresponding touch point effect, can be applied to the application
In the technical scheme that embodiment is proposed, such change can't affect the protection domain of the application.
Step S508, according to current touch point at the positional information of this frame and the historical position information in historical frames, really
Determine the information such as the movement velocity of touching object corresponding to current touch point, acceleration, the movable information of output current touch point.
If it should be noted that simply add up the speed of touch point, the information of a upper historical frames both may determine that phase
The result answered, however, if it is desired to obtain touch point movable information more accurately, it is necessary to determine this by multiple historical frames
The direction of motion variation tendency of touch point, the information such as acceleration.
In view of in current touch screen technology, a lot of touch operation contents is all relevant to the kinestate of touch point,
Such as, in video display process, upper and lower touch point has moved volume adjusting corresponding, and the touch point of left and right has been moved correspondence and broadcast
The adjustment of degree of putting into, and the amplitude that the speed moved left and right playing progress rate corresponding with acceleration adjusts or the change of broadcasting speed
Change.Therefore, complex touch point movable information will serve as the most important role, institute in the application extension of touch screen
With, the technical scheme that the embodiment of the present application is proposed by positional information in historical frames and present frame, determines in this step
More movable informations of current touch point, will be with a wide range of applications in actual applications.
Step S509, movable information according to current touch point, select the scanning needing to activate in the next scan period
Rule.
The multiframe movement tendency of the current touch point that the movable information according to current touch point is presented, adjusts scanning rule
Then.
If current touch point is single-point rapid movement, need to be adjusted to scanning rule two, because will not go out during single-point motion
Existing ghost point, long limit and minor face has only to each scanning direction and can position current touch point.
If current touch point is multiple spot rapid movement, then need to be adjusted to scanning rule three, it is ensured that remove ghost point ability
Meanwhile, reduce light path scanning as far as possible, reduce time delay influence.
If current touch point is low speed or resting state, then need to be adjusted to scanning rule four, increase light reticular density, can
To improve touch point scanning accuracy.
Step S510, terminate the current scan period, the scanning rule selected by activation, and return execution step S503.
Step S511, terminate the current scan period, activate default scan rule, and return execution step S503, the completeest
Become the initialization of scanning rule, in the case of there is no any touch operation, made infrared touch panel return to original state.
Step S512, terminate the current scan period, keep activating current scanning rule, and return execution step
S503, i.e. when current touch point does not has the historical position information of historical frames, keeps Current Scan rule, continues next one scanning
Cycle, thus accumulated history positional information, to complete the kinestate analysis of current touch point.
Compared with prior art, the Advantageous Effects of the technical scheme that the embodiment of the present application is proposed includes:
The embodiment of the present application discloses scan method and the device of a kind of infrared touch panel, and this scan method has been preset multiple
Scanning rule, by current touch point in present scanning cycle and on positional information in a scan period, determine and deserve
The movable information of front touch point, the scanning rule activated in selecting the next scan period accordingly, and selected by activation
After scanning rule, start next scan period continuation screen scanning, the technical side proposed by application the embodiment of the present application
Case, can determine the state of current touch point by analyzing the movable information of current touch point, switch more for different scenes
Add the scanning rule of adaptation, even if under the scene that dynamic multipoint touches, it is also possible to reduce the problem occurring losing a little and breaking, reach
To the accuracy and the purpose of Consumer's Experience that improve touch control.
The technical scheme that the embodiment of the present application is proposed goes to be substantially better than other existing infrared touch-controls on ghost algorithm at multiple spot
Sweeping scheme, has the difference of essence in thinking with it.Touch screen scanning rule can be adjusted according to the kinestate of touch point
Then, this differs markedly from the thought that tradition scanning rule is single.
Based on such roadmap, light path scanning can be reduced under touch objects rapid movement pattern, improve point and identify
Rate；Under touch objects low-speed motion pattern, increase light path scanning, improve the scanning accuracy of touch point.On this basis, Ke Yi
Under conditions of hardware is constant, eliminate impact that time delay error brought (because time the light path that is blocked causing gathering of postponing a meeting or conference go out
The biggest skew, but do not disappear).
The technical scheme that the embodiment of the present application is proposed contrasts with traditional infrared sweeping scheme, and maximum advantage is: grab
Live under touch objects different motion state, light path demand this key factor different, adjust scanning rule, eliminate scanning delay with
The impact that contact motion interaction is brought；In the case of not changing hardware configuration (not increasing cost), substantially improve
The man-machine interaction impressions such as touch screen is write, line.
For being illustrated more clearly that the scheme that the application previous embodiment provides, based on the invention structure as said method
Thinking, the embodiment of the present application also proposed a kind of infrared touch panel, and its structural representation as shown in Figure 8, specifically includes:
Rules administration module 81, is used for presetting multiple scanning rule；
Scan module 82, in present scanning cycle, according in the currently active described rules administration module 81
Scanning rule carry out screen scanning；
Positional information determines module 83, for adding up the described scan module 82 result to screen scanning, determines current touching
Touch positional information a little；
Movable information determines module 84, for determining current touch point determined by module 83 according to described positional information
Positional information and described current touch point positional information within a upper scan period, determine the motion of described current touch point
Information；
Select module 85, for determining the motion of described current touch point determined by module 84 according to described movable information
Information, in the described multiple scanning rule that described rules administration module 81 is preset, is activated in selecting the next scan period
Scanning rule；
Active module 86, for activating the scanning rule selected by described selection module 85, and notifies described scan module
82 start the next scan period.
Preferably, in the described infrared touch screen having preset multiple scanning rule, specifically include a kind of default scan regular:
Described active module 86, is additionally operable to, when described infrared touch screen starts, activate in described rules administration module 81
Default scan rule, and notify that described scan module 82 starts first scan period.
Preferably, described selection module 85, specifically for:
When determining the movable information of described current touch point determined by module 84 according to described movable information, determine current
When touch point is the touch point of a high-speed motion, in the described multiple scanning rule that described rules administration module 81 is preset,
Select that there is less scanning optical path number, and the scanning rule of the long minor face equal only one of which scanning direction at described infrared touch screen
Then, as the scanning rule activated in the next scan period；
When determining the movable information of described current touch point determined by module 84 according to described movable information, determine current
When touch point is the touch point of multiple high-speed motion, in the described multiple scanning rule that described rules administration module 81 is preset,
Select that there is less scanning optical path number, and the most at least include sweeping of two scanning directions at the long minor face of described infrared touch screen
Retouch rule, as the scanning rule activated in the next scan period；
When determining the movable information of described current touch point determined by module 84 according to described movable information, determine current
Touch point is static or during the touch point of low-speed motion, at the described multiple scanning rule that described rules administration module 81 is preset
In, select the scanning rule with more scanning optical path number, as the scanning rule activated in the next scan period.
Preferably, described active module 86, it is additionally operable to:
When described positional information determines that module 83 adds up the described scan module 82 result to screen scanning, and determine current
When there is not touch point, keep the scanning rule in the currently active described rules administration module 81, and start next scanning
Cycle；Or,
When described positional information determines that module 83 adds up the described scan module 82 result to screen scanning, and determine current
When there is not touch point, activate the described default scan rule in described rules administration module 81, and start next scanning week
Phase.
Preferably, described active module 86, it is additionally operable to:
When described movable information determines that module 84 judges that described current touch point did not exist the position in the upper scan period
During confidence breath, keep the scanning rule in the currently active described rules administration module 81, and notify that described scan module 82 is opened
Begin the next scan period.
Compared with prior art, the Advantageous Effects of the technical scheme that the embodiment of the present application is proposed includes:
The embodiment of the present application discloses scan method and the device of a kind of infrared touch panel, and this scan method has been preset multiple
Scanning rule, by current touch point in present scanning cycle and on positional information in a scan period, determine and deserve
The movable information of front touch point, the scanning rule activated in selecting the next scan period accordingly, and selected by activation
After scanning rule, start next scan period continuation screen scanning, the technical side proposed by application the embodiment of the present application
Case, can determine the state of current touch point by analyzing the movable information of current touch point, switch more for different scenes
Add the scanning rule of adaptation, even if under the scene that dynamic multipoint touches, it is also possible to reduce the problem occurring losing a little and breaking, reach
To the accuracy and the purpose of Consumer's Experience that improve touch control.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive the embodiment of the present invention
Can be realized by hardware, it is also possible to the mode adding necessary general hardware platform by software realizes.Based on such reason
Solving, the technical scheme of the embodiment of the present invention can embody with the form of software product, and this software product can be stored in one
In individual non-volatile memory medium (can be CD-ROM, USB flash disk, portable hard drive etc.), including some instructions with so that a meter
Calculate machine equipment (can be personal computer, server, or network equipment etc.) and perform each enforcement scene of the embodiment of the present invention
Described method.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram being preferable to carry out scene, module in accompanying drawing or
Flow process is not necessarily implemented necessary to the embodiment of the present invention.
It will be appreciated by those skilled in the art that the module in the device implemented in scene can be entered according to implementing scene description
Row is distributed in the device implementing scene, it is also possible to carries out respective change and is disposed other than one or more dresses of this enforcement scene
In putting.The module of above-mentioned enforcement scene can merge into a module, it is also possible to is further split into multiple submodule.
The invention described above embodiment sequence number, just to describing, does not represent the quality implementing scene.
The several scenes that are embodied as being only the embodiment of the present invention disclosed above, but, the embodiment of the present invention not office
Being limited to this, the changes that any person skilled in the art can think of all should fall into the business of the embodiment of the present invention and limit scope.
Claims (10)
1. the scan method of an infrared touch panel, it is characterised in that be applied to preset the infrared touch-control of multiple scanning rule
In screen, described method specifically includes:
In present scanning cycle, carry out screen scanning according to the currently active scanning rule；
The result of statistical screens scanning, determines the positional information of current touch point；
Positional information according to described current touch point and described current touch point positional information within a upper scan period,
Determine the movable information of described current touch point；
According to the movable information of described current touch point, in default described multiple scanning rule, select next one scanning week
The scanning rule activated in phase；
Scanning rule selected by activation, starts the next scan period.
2. the method for claim 1, it is characterised in that in the described infrared touch screen having preset multiple scanning rule,
Specifically include a kind of default scan regular:
When described infrared touch screen starts, activate described default scan rule, and start first scan period.
3. method as claimed in claim 2, it is characterised in that the described movable information according to described current touch point, in advance
If described multiple scanning rule in, the scanning rule activated in selecting the next scan period, specifically include:
When the movable information according to described current touch point, when determining the touch point that current touch point is a high-speed motion,
In the described multiple scanning rule preset, select that there is less scanning optical path number, and at the long minor face of described infrared touch screen
All scanning rules of only one of which scanning direction, as the scanning rule activated in the next scan period；
When the movable information according to described current touch point, when determining the touch point that current touch point is multiple high-speed motion,
In the described multiple scanning rule preset, select that there is less scanning optical path number, and at the long minor face of described infrared touch screen
The most at least include the scanning rule of two scanning directions, as the scanning rule activated in the next scan period；
When the movable information according to described current touch point, determine that current touch point is static or during the touch point of low-speed motion,
In default described multiple scanning rule, select the scanning rule with more scanning optical path number, scan as the next one
The scanning rule activated in cycle.
4. method as claimed in claim 2, it is characterised in that described in present scanning cycle, sweeps according to the currently active
Retouch after rule carries out screen scanning, also include:
When the result of statistical screens scanning, and determine when there is currently no touch point, keep the currently active scanning rule, start
The next scan period；Or,
When the result of statistical screens scanning, and determine when there is currently no touch point, activate described default scan rule, under starting
One scan period.
5. the method for claim 1, it is characterised in that the result of described statistical screens scanning, determines current touch point
Positional information after, also include:
When judging that described current touch point did not exist the positional information in the upper scan period, keep the currently active scanning
Rule, starts the next scan period.
6. an infrared touch panel, it is characterised in that specifically include:
Rules administration module, is used for presetting multiple scanning rule；
Scan module, in present scanning cycle, according to the scanning rule in the currently active described rules administration module
Then carry out screen scanning；
Positional information determines module, for adding up the described scan module result to screen scanning, determines the position of current touch point
Confidence ceases；
Movable information determines module, for determining the positional information of current touch point determined by module according to described positional information
With described current touch point positional information within a upper scan period, determined the movable information of described current touch point；
Select module, for determining the movable information of described current touch point determined by module according to described movable information,
In the described multiple scanning rule that described rules administration module is preset, the scanning rule activated in selecting the next scan period
Then；
Active module, for activating the scanning rule selected by described selection module, and notifies that described scan module starts next
The individual scan period.
Infrared touch screen the most as claimed in claim 6, it is characterised in that the described infrared touch-control having preset multiple scanning rule
In screen, specifically include a kind of default scan regular:
Described active module, is additionally operable to when described infrared touch screen starts, and the acquiescence activated in described rules administration module is swept
Retouch rule, and notify that described scan module starts first scan period.
Infrared touch screen the most as claimed in claim 7, it is characterised in that described selection module, specifically for:
When determining the movable information of described current touch point determined by module according to described movable information, determine current touch point
When being the touch point of a high-speed motion, in the described multiple scanning rule that described rules administration module is preset, select to have
Less scanning optical path number, and the scanning rule of the long minor face equal only one of which scanning direction at described infrared touch screen, as
The scanning rule activated in the next scan period；
When determining the movable information of described current touch point determined by module according to described movable information, determine current touch point
During for the touch point of multiple high-speed motions, in the described multiple scanning rule that described rules administration module is preset, select to have
Less scanning optical path number, and the scanning rule of two scanning directions is the most at least included at the long minor face of described infrared touch screen,
As the scanning rule activated in the next scan period；
When determining the movable information of described current touch point determined by module according to described movable information, determine current touch point
During for the touch point of static or low-speed motion, in the described multiple scanning rule that described rules administration module is preset, select tool
There is the scanning rule of more scanning optical path number, as the scanning rule activated in the next scan period.
Infrared touch screen the most as claimed in claim 6, it is characterised in that described active module, is additionally operable to:
When described positional information determine module add up the described scan module result to screen scanning, and determine there is currently no tactile
When touching, keep the scanning rule in the currently active described rules administration module, and start the next scan period；Or,
When described positional information determine module add up the described scan module result to screen scanning, and determine there is currently no tactile
When touching, activate the described default scan rule in described rules administration module, and start the next scan period.
Infrared touch screen the most as claimed in claim 6, it is characterised in that described active module, is additionally operable to:
When described movable information determines that module judges that described current touch point did not exist the positional information in the upper scan period
Time, keep the scanning rule in the currently active described rules administration module, and notify that described scan module starts the next one and sweeps
Retouch the cycle.
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