CN106055177B - A kind of scan method and device of infrared touch panel - Google Patents
A kind of scan method and device of infrared touch panel Download PDFInfo
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- CN106055177B CN106055177B CN201610524040.5A CN201610524040A CN106055177B CN 106055177 B CN106055177 B CN 106055177B CN 201610524040 A CN201610524040 A CN 201610524040A CN 106055177 B CN106055177 B CN 106055177B
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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
Abstract
The embodiment of the present application discloses the scan method and device of a kind of infrared touch panel, the scan method has preset a variety of scanning rules, location information by current touch point in present scanning cycle and in a upper scan period, determine the motion information of the current touch point, the scanning rule activated in next scan period is selected accordingly, and after activating selected scanning rule, start next scan period continuation screen scanning, pass through the technical solution proposed using the embodiment of the present application, the motion information of analysis current touch point can be passed through, determine the state of current touch point, the scanning rule being more adapted to for different scene switchings, even if under the scene that dynamic multipoint touches, the problem of occurring losing a little and breaking can also be reduced, achieve the purpose that the accuracy and user experience that improve touch control.
Description
Technical field
This application involves touch control field, in particular to the scan method and device of a kind of infrared touch panel.
Background technique
Touch screen (touch screen) is also known as " touch screen ", " touch panel ", and being one can detecte and showing
The electronic system of the presence and position that touch in region, simplifies man-machine interaction method.Touch screen is distinguished from technical principle, it can
It is divided into five basic kinds: infrared technology touch screen, vector pressure sensing technology touch screen, resistive technologies touch screen, capacitor
Technology touch screen, surface acoustic wave technique touch screen.
In current touch technology, infrared technology touch screen (Infrared Touch Screen Technology) tool
There are environmental suitability strong, longer life expectancy, can recognize and touch the advantages such as points are more.Infrared technology touch screen is by mounted in touch
The Infrared emitting and receiving sensing element shielded on outline border is constituted, and appearance is a rectangular configuration, in screen surface, is formed red
Outside line detection network, any touching object can be changed the infrared ray on contact and realize touch screen operation.
As shown in Figure 1, being a kind of structural schematic diagram of infrared technology touch screen in the prior art, by a long side
Transmitting side, a long receiving while, a short side transmitting side, one short receiving while composition.There are several transmittings in transmitting side
Lamp is corresponding with several reception lamps on correspondingly received side, generallys use 1 pair of multimode and be scanned, i.e., an emission lamp shines, right
The multiple reception lamps in face receive simultaneously, and light net is consequently formed, and are judged according to different shape of the light net when 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 short side and hidden
Light-blocking road is orthogonal to obtain touch point, and therefore, when single-touch can work normally；When multiple point touching, the orthogonal points found out are more
Points in true contact need to carry out true and false point judgement (referred to as removing terrible point), and otherwise, system can malfunction.
For the above problem existing under multiple point touching scene, existing processing method have time-sharing approach, zone method and
Logic null method.
Applicant has found that above-mentioned existing processing scheme at least has the following problems during realizing the application:
Time-sharing approach: assuming that multiple point touching is the event successively occurred, each moment, only one point was touched, but for
Multiple contacts touch helpless simultaneously.
Zone method: being divided into multiple small regions for touch screen, and each region only allows a touch touch, but in this way
Reduce the resolution ratio of touch screen.
Logic null method: it is better than time-sharing approach and zone method, but also has very big defect.In order to avoid light interference and power consumption limit
System, more optical path sweep times of infrared touch panel are different, i.e., at a time only one emission lamp shines.At this moment contact is mobile
When the light network data that scans be with error, this phenomenon is referred to as time delay error, as shown in Fig. 2, being logic in the prior art
The schematic illustration of time delay error caused by null method, short side scanning monitor position a little, and in long side scanning, contact can
It can move, not in situ.This just seeks and goes ghost point to bring very big influence to a position.
It can be seen that conventional point location algorithm not can effectively solve, the touch under multiple point touching scene is lost a little and that breaks asks
Topic, has seriously affected the accuracy and user experience of touch control.
Summary of the invention
The embodiment of the present application provides the scan method and device of a kind of infrared touch panel, is cut with realizing for different scenes
The scanning rule being more adapted to is changed, the accuracy of touch control and the purpose of user experience are improved, even if being touched in dynamic multipoint
Scene under, can also reduce occur losing a little and broken string the problem of.
In order to reach above-mentioned technical purpose, this application provides a kind of scan methods of infrared touch panel, are applied to default
In the infrared touch panels of a variety of scanning rules, the method is specifically included:
In present scanning cycle, screen scanning is carried out according to the currently active scanning rule；
Statistical screens scanning as a result, determine current touch point location information；
According to the position of the location information of the current touch point and the current touch point within a upper scan period
Information determines the motion information of the current touch point；
According to the motion information of the current touch point, in preset a variety of scanning rules, next sweep is selected
Retouch the scanning rule activated in the period；
Selected scanning rule is activated, next scan period is started.
Preferably, in the infrared touch panel for having preset a variety of scanning rules, a kind of default scan rule is specifically included:
When infrared touch panel starting, the default scan rule is activated, and start first scan period.
Preferably, the motion information according to the current touch point, in preset a variety of scanning rules, choosing
The scanning rule activated in next scan period is selected, is specifically included:
When the motion information according to the current touch point, determine that current touch point is the touch point of a high-speed motion
When, in preset a variety of scanning rules, selection has less scanning optical path number, and in the length of the infrared touch panel
The scanning rule of short side only one scanning direction, as the scanning rule activated in next scan period；
When the motion information according to the current touch point, determine that current touch point is the touch point of multiple high-speed motions
When, in preset a variety of scanning rules, selection has less scanning optical path number, and in the length of the infrared touch panel
Short side includes at least the scanning rule of two scanning directions, as the scanning rule activated in next scan period；
When the motion information according to the current touch point, determine that current touch point is static or low-speed motion touch point
When, in preset a variety of scanning rules, the scanning rule with more scanning optical path numbers is selected, is swept as next
Retouch the scanning rule activated in the period.
Preferably, described in present scanning cycle, after carrying out screen scanning according to the currently active scanning rule, also
Include:
When statistical screens scanning as a result, and determine there is currently no when touch point, keep the currently active scanning rule,
Start next scan period；Or,
When statistical screens scanning as a result, and determine there is currently no the default scan rule when touch point, is activated, open
Begin next scan period.
Preferably, statistical screens scanning as a result, determining the location information of current touch point after, further includes:
When judging that the current touch point there is no when location information in a upper scan period, kept the currently active
Scanning rule starts next scan period.
In addition, being specifically included the embodiment of the present application also provides a kind of infrared touch panel:
Rules administration module, for presetting a variety of scanning rules；
Scan module is used in present scanning cycle, according to sweeping in the currently active rules administration module
It retouches rule and carries out screen scanning；
Location information determining module, for counting the scan module to screen scanning as a result, determining current touch point
Location information；
Motion information determining module, the position for current touch point determined by determining module according to the positional information
The location information of information and the current touch point within a upper scan period determines the movement letter of the current touch point
Breath；
Selecting module, the movement for the current touch point according to determined by the motion information determining module are believed
Breath selects that is activated in next scan period to sweep in the preset a variety of scanning rules of the rules administration module
Retouch rule；
Active module for activating the selected scanning rule of the selecting module, and notifies the scan module to start
Next scan period.
Preferably, in the infrared touch panel for having preset a variety of scanning rules, a kind of default scan rule is specifically included:
The active module is also used to when the infrared touch panel starts, and is activated silent in the rules administration module
Recognize scanning rule, and the scan module is notified to start first scan period.
Preferably, the selecting module, is specifically used for:
When the motion information of the current touch point according to determined by the motion information determining module, current touching is determined
Touch a little be a high-speed motion touch point when, in the preset a variety of scanning rules of the rules administration module, selection
With less scanning optical path number, and the scanning rule in the long short side of the infrared touch panel only one scanning direction,
As the scanning rule activated in next scan period；
When the motion information of the current touch point according to determined by the motion information determining module, current touching is determined
Touch a little be multiple high-speed motions touch point when, in the preset a variety of scanning rules of the rules administration module, selection
The scanning rule of two scanning directions is included at least with less scanning optical path number, and in the long short side of the infrared touch panel
Then, as the scanning rule activated in next scan period；
When the motion information of the current touch point according to determined by the motion information determining module, current touching is determined
When touching a little as static or low-speed motion touch point, in the preset a variety of scanning rules of the rules administration module, choosing
The scanning rule with more scanning optical path numbers is selected, as the scanning rule activated in next scan period.
Preferably, the active module, is also used to:
When the location information determining module count the scan module to screen scanning as a result, and determination do not deposit currently
At touch point, the scanning rule in the currently active rules administration module is kept, and start next scan period；
Or,
When the location information determining module count the scan module to screen scanning as a result, and determination do not deposit currently
At touch point, the default scan rule in the rules administration module is activated, and start next scan period.
Preferably, the active module, is also used to:
When the motion information determining module judges the current touch point, there is no the positions in a upper scan period
When information, the scanning rule in the currently active rules administration module is kept, and it is next to notify that the scan module starts
A scan period.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The embodiment of the present application discloses the scan method and device of a kind of infrared touch panel, which has preset a variety of
Scanning rule, the location information by current touch point in present scanning cycle and in a upper scan period, determination are deserved
The motion information of preceding touch point selects the scanning rule activated in next scan period accordingly, and selected activating
After scanning rule, starts next scan period continuation screen scanning, pass through the technical side proposed using the embodiment of the present application
Case can determine the state of current touch point, more for different scene switchings by the motion information of analysis current touch point
Add the scanning rule of adaptation, even if can also reduce the problem of occurring losing a little and breaking under the scene that dynamic multipoint touches, reach
To the purpose for the accuracy and user experience for improving touch control.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of the technical solution of the application
It is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of infrared technology touch screen in the prior art；
Fig. 2 is the schematic illustration of time delay error caused by logic null method in the prior art；
Fig. 3 is a kind of structural schematic diagram for infrared touch panel that the embodiment of the present application proposes；
A kind of flow diagram of the scan method for infrared touch panel that Fig. 4 is proposed by the embodiment of the present application；
The stream of the scan method of infrared touch panel under a kind of concrete application scene that Fig. 5 is proposed by the embodiment of the present application
Journey schematic diagram；
Fig. 6 A is on a scanning direction corresponding to long side under 1 pair 2 of scanning rule a kind of in concrete application scene
Parallel light path schematic diagram；
Fig. 6 B is on another scanning direction corresponding to long side under 1 pair 2 of scanning rule a kind of in concrete application scene
Parallel light path schematic diagram；
Fig. 7 A, Fig. 7 B, Fig. 7 C and Fig. 7 D are respectively that proposed under concrete application scene four kinds of the embodiment of the present application are red
The schematic diagram of the scanning rule of outer touch screen；
A kind of structural schematic diagram for infrared touch panel that Fig. 8 is proposed by the embodiment of the present application.
Specific embodiment
As the application background technique is stated, in the case where multiple point touching controls scene, lost a little and broken string to reduce, need
Scan frequency is improved, scanning optical path number is reduced, and in order to improve scanning accuracy, realize accurate control, and need to increase scanning
Optical path number, demand of the two to scanning rule are runed counter to, and be cannot achieve and are taken into account in existing infrared touch panel scanning technique.
Present inventor wishes to be may be implemented by method provided herein for different scene switchings more
Add the scanning rule of adaptation, to realize preferably scanning effect.Even if can also be reduced out under the scene that dynamic multipoint touches
The problem of now losing a little and breaking, improves the accuracy and user experience of touch control.
It is described for convenience, the embodiment of the present application, which gives, realizes that a kind of specific hardware structure of the technical program is shown
Example.As shown in figure 3, a kind of structural schematic diagram of the infrared touch panel proposed for the embodiment of the present application.
In infrared scan screen 300, MCU301 is handled corresponding scanning rule for managing and selecting scanning rule
Scheme is sent to transmitting scanning circuit 302 and receives scanning circuit 303.Emit scanning circuit 302 and controls infrared transmitting tube matrix
304 according to corresponding scanning rule carry out infrared ray transmitting, receive scanning circuit 303 control infrared receiving tube matrix 305 according to
The received infrared ray of corresponding scanning rule identification, and corresponding reception condition is fed back into sample circuit 306.Sampling electricity
Road 306 by met according to scanning rule the infrared ray received be an actually-received infrared ray the case where compare, identify
Touch area, and corresponding recognition result is fed back into MCU301.MCU301 changes according to the historical information of touch area, analysis
The motion state of touch area, and the scanning rule to match is selected, to be sent to accordingly with more suitable scanning rule
Circuit carry out follow up scan processing.Further, primary processor 307 controls MCU301 and receives MCU301 feedback
Touch information, to make corresponding processing to operational order corresponding to touch operation.
In actual application, the processing function of two units of primary processor 307 and MCU301 is desirably integrated into an object
Reason unit is to realize, also, function treatment can also be integrated with the hardware in terminal device accordingly, hard further to compress
Part scale is realized that hardware simplicity especially can be such that the hardware configuration of single infrared touch panel further simplifies, is realized more
Good hardware is simplified, lightening.
It should be noted that above-mentioned hardware configuration be intended merely to facilitate the subsequent explanation of the embodiment of the present application and provide one
Kind of preferred embodiment, in practical applications, corresponding hardware cell can be integrated merging or further decompose, can be real
On the basis of existing same technique effect, the variation of specific hardware cell deployment will not influence the protection scope of the application.
As shown in figure 4, a kind of flow diagram of the scan method of the infrared touch panel proposed by the embodiment of the present application,
This method is applied to preset in the infrared touch panel of a variety of scanning rules, and corresponding infrared touching screen structure is with aforementioned Fig. 3 institute
It is specifically described for the structure provided, this method specifically includes:
Step S401, in present scanning cycle, screen scanning is carried out according to the currently active scanning rule.
The specific implementation of this step can be handled by transmitting scanning circuit 302 above-mentioned and reception scanning circuit 303,
Two kinds of circuits control infrared transmitting tube matrix 304 and infrared receiving tube matrix 305 respectively, the scanning activated according to MCU301
Rule carries out infrared ray transmitting and reception, thus, realize screen scanning.
This step is directly performed after present scanning cycle starts, i.e. MCU301 selection activates corresponding scanning rule
Afterwards, that is, start to carry out the processing of this step.The length of scan period can be according to the needs of hardware condition and practical application scene
It is configured, it is such to change the protection scope that will not influence the application.
As previously mentioned, a variety of scanning rules have been preset in current infrared touch panel, it is a variety of to sweep in concrete application scene
Retouching rule can be managed by MCU301, and default scanning rule content can be sent to MCU301 by primary processor 307 accordingly.
Such a variety of scanning rules are prepared to cope with different application scenarios.Specific scanning rule feature is subsequent
It can be further described in conjunction with specific application scenarios in processing step, details are not described herein.
In actual application scenarios, for the realization of initialization operation, need to select in above-mentioned a variety of scanning rules
One is selected as default scan rule.It when infrared touch panel starting, needs to activate the default scan regular, and starts the
The scan process of one scan period.
Specifically, the selection of default scan rule can be configured according to actual needs, it is specifically chosen the variation of content
It will not influence the protection scope of the application.
But, it is contemplated that the touch scene of original state is unknown, in order to balance the scanning effect of each scene, this default
Scanning rule can select that there is moderate scanning optical path quantity and scan frequency to sweep in preset multiple scanning rules
Rule is retouched, even if it can have certain scanning accuracy under low speed scene in single-point and multi-point touch, and high speed,
Do not appear in has higher accuracy in a scenario, and under opposite scene the case where then serious misalignment.
On the other hand, after this step executes completion, according to corresponding screen scanning result, in fact it could happen that two kinds of feelings
Condition:
Situation one captures current touch operation by scanning, that is, there is current touch point, then follow the steps
S402。
Situation two, be do not capture any touch operation, thus, determine there is currently no touch points, in this feelings
It, can be there are two types of processing scheme under condition:
Option A, without adjusting Current Scan state, keep the currently active scanning rule, start next scan period
Scan process.Such processing scheme can keep the continuity of touch operation, i.e., for adjacent touch operation type phase
Close situation can have preferably scanning accuracy.
Option b, the activation default scan rule, start the scan process of next scan period.Such processing side
Case can take into account the touch operation under different scenes, i.e., after a touch operation, scanning mode is restored initial, in this way,
No matter touch operation next time is similar to the feature that preceding touch operates or on the contrary, can guarantee that a degree of scanning is known
Other accuracy.
In practical applications, in the case of the scanning rule activated in present scanning cycle is exactly default scan rule
Under, the content of above-mentioned option A and option b is consistent.
Respectively there is above-mentioned option A and option b certain advantage and defect can according to need in practical applications
Selection setting is carried out, it is such to change the protection scope that will not influence the application.
Step S402, statistical screens scanning as a result, determine current touch point location information.
The specific implementation of this step can be handled by sample circuit 306 above-mentioned, and sample circuit 306 will be according to scanning
Rule meet the infrared ray received be an actually-received infrared ray the case where compare, identify touch area, as work as
The location information of preceding touch point.
After this step executes completion, recognition result is fed back to MCU301 by sample circuit 306, according to current touch point
The location information for further going to inquire in a upper scan period with the presence or absence of the current touch point can according to query result
Two kinds of situations can occur:
Situation one inquired the current touch point there are the location information in a upper scan period, that is, deposited in this prior
The historical position information of touch point records, and thens follow the steps S403.
The location information of situation two, inquiry less than the current touch point within a upper scan period, thus, judgement is deserved
There is no the location informations in a upper scan period for preceding touch point, so, the currently active scanning rule is kept, is started next
The scan operation of a scan period.
Why the currently active scanning rule is kept, primarily within next scan period, it can be with same
Scanning rule get the location information of the current touch point, both be information criterion of identification having the same, to keep
The continuity of identification information improves the accuracy of recognition result.
It should be noted that for inquiring the location information less than the current touch point within a upper scan period, it can
It can be because the current scan period is exactly first scan period after infrared touch panel starts or is reactivated, without depositing
In a upper scan period；It was also likely to be within a upper scan period, there is no the corresponding operation of current touch point or even roots
Originally without touch operation, no matter that above-mentioned situation, result is all that current touch point is caused not have historied position to believe
Breath can for reference, it is therefore desirable to continue to obtain location information in next scan period, to analyze the movement of current touch point
State.
Step S403, according to the location information of the current touch point and the current touch point in a upper scan period
Interior location information determines the motion information of the current touch point.
The specific implementation of this step can be handled by MCU301 above-mentioned, and historical touch control is stored in MCU301
Information, it is no be fitted on the historical position information of current touch point after, determine current touch according to two or more location informations
The motion information of point.It should be noted that such analysis processing can also be by primary processor in order to realize having a single function
307 complete, and MCU301 is only responsible for the management of scanning rule and calls activation, such to change the guarantor that will not influence the application
Protect range.
In actual application scenarios, in order to realize more accurate motion state as a result, the embodiment of the present application is proposed
Technical solution can further go obtain again the position of upward a cycle or the current touch point in the more multicycle believe
Breath, thus, realize the analysis of more accurate motion information.
It is position coordinates including the current touch point, current it should be noted that the motion information mentioned in this step
One or more of information such as speed, acceleration, all information that can be used for touch point moving state identification can answer
It uses in this step, it is such to change the protection scope that will not influence the application.
Step S404, according to the motion information of the current touch point, in preset a variety of scanning rules, selection
The scanning rule activated in next scan period.
This step belongs to the calling management of scanning rule, and specific implementation can be handled by MCU301 above-mentioned.
In view of the needs of plurality of application scenes, the technical solution that the embodiment of the present application is proposed has penetrated a variety of scannings finally
Rule, for convenience of explanation, for plurality of application scenes below, according to the processing mode of this step be illustrated respectively as
Under:
Scene one, when the motion information according to the current touch point, determine that current touch point is a high-speed motion
When touch point, in preset a variety of scanning rules, selection has less scanning optical path number, and in the infrared touch
The scanning rule of the long short side of screen only one scanning direction, as the scanning rule activated in next scan period.
Such processing scheme can activate the scanning rule with higher scan frequency, improve the knowledge of the single touch point of high-speed motion
It does not spend, reduces delay error, moreover, single scanning direction meets the needs of single locus capture enough, improve scan frequency
Resource consumption can also be reduced simultaneously.
Scene two, when the motion information according to the current touch point, determine that current touch point is multiple high-speed motions
When touch point, in preset a variety of scanning rules, selection has less scanning optical path number, and in the infrared touch
The long short side of screen includes at least the scanning rule of two scanning directions, as the scanning rule activated in next scan period
Then.Such processing scheme can activate the scanning rule with higher scan frequency, improve multiple touch points of high-speed motion
Resolution, reduce delay error, moreover, at least a scanning direction meets the needs of multiple spot position capture enough, reduction is lost a little
And broken string.
Scene three, when the motion information according to the current touch point, determine that current touch point is static or low-speed motion
Touch point when, in preset a variety of scanning rules, select have more scanning optical path numbers scanning rule, as
The scanning rule activated in next scan period.Such processing scheme can activate the scanning rule with more scanning optical paths
Then, the precision for improving screen surface sweeping improves the accuracy of touch control.
Three above-mentioned application scenarios are specific example given by the embodiment of the present application, for other applied fields
Scape can equally take similar scheme, reach better screen scanning effect, realize more accurate touch control operation.
It should be noted that in above-mentioned each scene, can not only one scanning rule selection, for example, for field
Scape two determines that current touch point is in present scanning cycle if the scanning optical path number of the currently active scanning rule is N
When the touch point of multiple high-speed motions, can specifically identify the velocity amplitude of the current touch point, if velocity amplitude be not above it is pre-
If superelevation threshold value, then select the scanning rule that activation scanning optical path number is N/2, and if velocity amplitude is higher than preset superelevation
Threshold value, then selecting activation scanning optical path number is the scanning rule of N/3, i.e., has further selected less scanning optical path number, reached
Higher scan frequency, to adapt to higher touch point movement speed.Certainly, alternative scanning rule not only can be two
It is a, it is even more to be also possible to three, and the situation under other scenes can equally use similar processing, realize more accurate
Grading control.It is such to change the protection scope that will not influence the application.
Step S405, selected scanning rule is activated, next scan period is started.
The specific implementation of this step can emit scanning circuit 302 with MCU301 above-mentioned and receive scanning circuit
303 complete, and MCU301 determines the scanning rule for needing to activate, or receive the transmission of primary processor 307 activation some sweep
After the instruction for retouching rule, corresponding scanning rule or scanning are sent to transmitting scanning circuit 302 and reception scanning circuit 303
Specific transmitting and reception scheme corresponding to rule, to be transferred at the circulation for carrying out next scan period in step S401
Reason.
It is returned after the completion of this step and restarts the new scan period, restart step S401~step S405
Circulation is realized the adaptive adjustment of scanning rule, is reached more constantly according to current application scenarios variation adjustment scanning rule
Good touch control accuracy.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The embodiment of the present application discloses the scan method and device of a kind of infrared touch panel, which has preset a variety of
Scanning rule, the location information by current touch point in present scanning cycle and in a upper scan period, determination are deserved
The motion information of preceding touch point selects the scanning rule activated in next scan period accordingly, and selected activating
After scanning rule, starts next scan period continuation screen scanning, pass through the technical side proposed using the embodiment of the present application
Case can determine the state of current touch point, more for different scene switchings by the motion information of analysis current touch point
Add the scanning rule of adaptation, even if can also reduce the problem of occurring losing a little and breaking under the scene that dynamic multipoint touches, reach
To the purpose for the accuracy and user experience for improving touch control.
Below in conjunction with the attached drawing in the application, clear, complete description is carried out to the technical solution in the application, is shown
So, described embodiment is a part of the embodiment of the application, instead of all the embodiments.Based on the implementation in the application
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all belongs to
In the range of the application protection.
As previously shown, existing infrared touch panel scanning technique (is just being cleared off road and tiltedly cleared off using the scanning of multi-direction optical path
Road), a kind of scanning rule is set in initialization, periodically multi-direction more optical paths are successively swept according to this scanning rule
It retouches.
But it is needed in practical applications in face of two problems, firstly, the difference of all directions sweep time causes contact mobile
When the light network data that scans be to be lost a little when showing as quickly moving with error.
On the other hand, since optical path scans between number and point precision, point discrimination, there are contradictory relations, in order to reduce time delay
Influence, improve movement time point discrimination, need as far as possible reduce scanning optical path number, and put precision require increase scan light
Number.Therefore, it when facing unknown touch dotted state, or touching the changeable application scenarios of dotted state, tends not to take into account.
Traditional scanning mode is in order to solve this problem, it will usually find the scanning rule of a compromise, still, thus
Bring two defects:
1, when low-speed motion, touching object point precision is not high, influences touch control accuracy.
2, when high-speed motion, point discrimination is not high, occurs losing a little and break.
In order to solve the above technical problems, patent No. CN 102053757A discloses a kind of multiple spot based on analog image
Locating scheme, the principle of the program are as follows: firstly, the axis scanning of multiple angles is carried out, then, to axis scanning initial data through the past
After the processing of the volume of data such as environment light, data normalization, the axis touch information of logic is generated, is worked as according to the generation of these information
The luminance graph of previous frame identifies multiple effective touch areas, reuses image by the comparison with theoretical touch luminance graph
Tracing algorithm, the event of final output multiple point touching.But due to the influence of delay problem, in the motion process of contact, present frame
Luminance graph and the virtual condition of present frame will appear large error, thus, in the theoretical comparison process for touching luminance graph,
It is easy to appear the phenomenon that disappearing.
The embodiment of the present application is reduced appeared in CN 102053757A to solve above-mentioned problem of the prior art
Similar time delay error and point disappearance problem, propose and preset different scanning rules in infrared touch panel, further according to institute
The historical movement information of the current touch point of record adjusts the technical solution of the scanning rule of current application in real time, makes infrared touching
Screen is touched always in optimal operating mode, is solved and is lost point caused by scanning delay of the touch point in quick movement, breaks
The problems such as line and touch point the not high problem of the scanning element precision in low-speed motion, improve user experience and touch control
Accuracy.
As shown in figure 5, the scanning of the infrared touch panel under a kind of concrete application scene proposed by the embodiment of the present application
The flow diagram of method, this method specifically include:
Step S501, a variety of scanning rules are preset in infrared touch panel, and therefrom determine default scan rule.
In practical applications, this step also needs that the scan period is arranged, when including in general, in the scan period two parts
Between: it is under Current Scan rule first, whole scanning optical paths on all scanning directions are fully completed required for single pass
Time, followed by complete the subsequent scanning rule selection course of the technical program time, the summation of this two parts time is just
It is the basic time length of scan period.
Due to the time that single emission lamp executes a scanning optical path be it is fixed, it is specific in scan period and scanning rule
The scanning optical path quantity of setting is corresponding relevant, and the time span difference for completing subsequent processing is very small, so, it can recognize
For actually correspondence contains corresponding scan period information, in such an application scenario, different scanning optical path in scanning rule
Quantity, scanning rules different in other words have corresponded to different scan period length.It is such to be advantageous in that adjacent sweeping twice
The process of retouching can be not in the interval of sky window time with seamless interfacing, correspondingly, the probability for time delay occur also just is greatly lowered,
It can accomplish to obtain touch point information in real time, be not in the problems such as losing point, breakpoint.
Certainly, in practical applications, in order to guarantee that the regularization of scan operation carries out, unified scanning week also can be set
Phase, to meet the scanning rule comprising most scanning optical path numbers as standard.When executing other scanning rules, comprising a certain number of
The empty window phase, in the case where the empty window phase being less than certain numerical value, i.e., elongatedness is less than certain numerical value when caused by the empty window phase, will not
In the case where the data accuracy for influencing touch point, such scan period set-up mode is also that can be applied.In this way
Application scenarios under, different scanning optical path quantity, scanning rule different in other words has corresponded to identical scan period length.This
The set-up mode of sample by the scan period in every kind of scanning rule be it is unified, can be to avoid frequent change scan period data institute
Caused system resources consumption, meanwhile, also facilitate the scanning times and data volume counted within the unit time, keeps system processing
The steady use of resource is not in the operation fluctuation of process resource in the unit time caused by changing due to the scan period,
The even running of holding system.
Which kind of in practical applications, according to specifically needing can choose suitable scan period scheme, specifically swept using
Cycle regimen is retouched, will not influence the protection scope of the application.
In the technical solution that the embodiment of the present application is proposed, scanning under different motion state for touch point is needed with algorithm
Flexible scanning rule has been preset in the connection asked, and the content that each scanning rule is configured includes scanning direction number n and each of which is swept
Retouch the angle in direction.
Wherein, the concrete meaning of scanning direction is as follows:
In 1 couple of n (n >=1) scanning mode, every optical path possesses different angles for particular lamp；For one
Particular transmission lamp, corresponding to n optical path in, angle that every optical path is possessed is a scanning direction.Therefore, 1 couple of n
It will include n scanning direction in scanning rule.
In specific application scenarios, each scanning direction is made of one group of parallel light path with slope, such as Fig. 6 A and
Shown in Fig. 6 B, respectively in concrete application scene under 1 pair 2 of one kind of scanning rule, on 2 scanning directions corresponding to long side
Parallel light path schematic diagram.
For convenience of explanation, following four scanning rule is given in the technical solution that the embodiment of the present application is proposed, such as
Fig. 7 A, Fig. 7 B, shown in Fig. 7 C and Fig. 7 D, respectively four kinds of infrared touchings being proposed under concrete application scene of the embodiment of the present application
The schematic diagram of the scanning rule of screen is touched, for convenience, is only respectively given in long side and short side respectively in each schematic diagram
The signal route of a scanning optical path on each scanning direction.
Wherein, the scanning rule one gone out given in Fig. 7 A is 1 pair 3 of scanning rule, the scanning rule gone out given in Fig. 7 B
Two be 1 pair 1 of scanning rule, the scanning rule that the scanning rule three gone out given in Fig. 7 C is 1 pair 2, and what is gone out given in Fig. 7 D sweeps
Retouch the scanning rule that rule four is 1 pair 9.
It, can be with since scanning rule one has moderate scanning optical path number in the technical solution that the present embodiment is proposed
The touch point of height and low-speed motion is taken into account, so, setting scanning rule one is default scan rule.
Certainly, in actual application scenarios, preset scanning rule is not limited only to scanning rule given above
Quantity and content, under the premise of can satisfy the scanning demand of different touch point motion states, specific scanning rule content and
The variation of default scanning rule quantity will not influence the protection scope of the application.
Step S502, infrared touch panel starts, activation default scan rule.
In view of infrared touch panel can also stop current surface sweeping processing in suspend mode, so, starting here can
To refer to initial start, it is also possible to infrared touch panel and is waken up activation in suspend mode.Start successfully in infrared touch panel
Afterwards, the default scan rule being arranged in step S501 is activated.
Step S503, start the new scan period, screen scanning operation is executed according to the currently active scanning rule.
In actual application scenarios, scan operation in this step can be full screen scanning, be also possible to tracking and sweep
It retouches, parallel scan scanning mode, it is such to change the protection scope that will not influence the application.
Step S504, the result of statistical screens scanning.
All region that is blocked (touch area) coordinates on long side and short side on each scanning direction are successively counted respectively,
Until scanning direction all on long side and short side is processed.In specific statistic processes, long side and short side and same
Each scanning direction not inevitable sequencing requirement on side, as long as being sequentially completed all scan statistics.
It is blocked since the region that is blocked will appear the infrared ray that emission lamp is issued, corresponding reception lamp can not be emitted to
The case where.Therefore, each reception lamp is directly counted in the infrared receiver situation of all directions scanning period, so that it may which determination is blocked
Scanning optical path position, and then the edge coordinate in the region that obtains being blocked.This step just completes the statistics of scan data accordingly
Process.
Step S505, region (touch area) coordinate that is effectively blocked is judged whether there is.
If it is judged that be it is yes, then follow the steps S506；
If it is judged that be it is no, then follow the steps S511.
It should be noted that in practical applications, in order to improve scanning accuracy, the execution of this step also need include
Except the operation of interference information.It avoids because caused by the improper touch objects of extraneous shadow electromagnetic change or dust clast etc.
Interference information, and obvious unreasonable occlusion area information.Only in this way just can be effectively blocked region (touch
Region) coordinate, details are not described herein.
Step S506, collect statistics data, algorithm count the region being blocked, determine current touch point according to occlusion area
Location information.
Step S507, according to the location information of the current touch point of this frame (present scanning cycle), current touch point is inquired
It whether there is historical position information in historical frames (upper one or preceding several scan periods).
If it does, executing step S508；
If it does not, executing step S512.
Dependent on touch information corresponding to current touch point is found in history frame information, this is needed for the processing of this step
The trend that track reasonability and touch location change is analyzed to determine, in the prior art, there is mature solution
Scheme.In practical applications, all to reach the technical solution for identifying corresponding touch point effect, it can be applied to the application
It is such to change the protection scope that will not influence the application in the technical solution that embodiment is proposed.
Step S508, according to current touch point in the location information of this frame and the historical position information in historical frames, really
Determine the information such as movement velocity, the acceleration of touching object corresponding to current touch point, exports the motion information of current touch point.
It should be noted that the information of a upper historical frames can both determine phase if only counting the speed of touch point
It is answering as a result, however, if it is desired to obtain more accurate touch point motion information, 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, many touch operation contents are all related to the motion state of touch point,
For example, upper and lower touch point is mobile to have corresponded to volume adjustment, and mobile corresponded in the touch point of left and right is broadcast in video display process
The adjustment of degree of putting into, and the velocity and acceleration moved left and right has corresponded to the amplitude of playback progress adjustment or the change of broadcasting speed
Change.Therefore, more complicated touch point motion information will serve as more and more important role, institute in the application extension of touch screen
With the technical solution that the embodiment of the present application is proposed passes through location information in historical frames and present frame in this step, to determine
More motion informations of current touch point, will be with a wide range of applications in practical applications.
Step S509, according to the motion information of current touch point, the scanning for needing to activate in next scan period is selected
Rule.
According to the multiframe movement tendency for the current touch point that the motion information of current touch point is presented, scanning rule is adjusted
Then.
If current touch point is that single-point quickly moves, need to be adjusted to scanning rule two, because single-point will not go out when moving
Show ghost point, only needs each scanning direction that can position current touch point in long side and short side.
It if current touch point is that multiple spot quickly moves, then needs to be adjusted to scanning rule three, guarantees to remove terrible point ability
Meanwhile optical path scanning is reduced as far as possible, reduce time delay influence.
If current touch point is low speed or stationary state, then needs to be adjusted to scanning rule four, increase light reticular density, it can
To improve touch point scanning accuracy.
Step S510, terminate the current scan period, activate selected scanning rule, and return to step S503.
Step S511, terminate the current scan period, activation default scan rule, and return to step S503, i.e., it is complete
At the initialization of scanning rule, in the case where no any touch operation, infrared touch panel is made to be restored to original state.
Step S512, terminate the current scan period, keep activating current scanning rule, and return to step
S503 keeps Current Scan rule, continues next scanning that is, when current touch point does not have the historical position information of historical frames
Period, thus accumulated history location information, to complete the motion state analysis of current touch point.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The embodiment of the present application discloses the scan method and device of a kind of infrared touch panel, which has preset a variety of
Scanning rule, the location information by current touch point in present scanning cycle and in a upper scan period, determination are deserved
The motion information of preceding touch point selects the scanning rule activated in next scan period accordingly, and selected activating
After scanning rule, starts next scan period continuation screen scanning, pass through the technical side proposed using the embodiment of the present application
Case can determine the state of current touch point, more for different scene switchings by the motion information of analysis current touch point
Add the scanning rule of adaptation, even if can also reduce the problem of occurring losing a little and breaking under the scene that dynamic multipoint touches, reach
To the purpose for the accuracy and user experience for improving touch control.
The technical solution that the embodiment of the present application is proposed goes on terrible algorithm to be substantially better than other existing infrared touch-controls in multiple spot
Sweeping scheme has the difference of essence in thinking with it.Touch screen scanning rule can be adjusted according to the motion state of touch point
Then, this differs markedly from the single thought of traditional scanning rule.
Based on such roadmap, optical path scanning can be reduced under the quick motor pattern of touch objects, improve point identification
Rate；Under touch objects low-speed motion mode, increases optical path scanning, improve the scanning accuracy of touch point.On this basis, Ke Yi
Under conditions of hardware is constant, eliminating influences brought by time delay error (because the optical path that is blocked that time delay will lead to acquisition goes out
Existing larger offset, but do not disappear).
The technical solution and traditional infrared sweeping scheme that the embodiment of the present application is proposed compare, and biggest advantage is: grabbing
Firmly under touch objects different motion state, this different key factor of optical path demand adjusts scanning rule, eliminate scanning delay with
Contact movement influences brought by interacting；In the case where not changing hardware configuration (not increasing cost), substantially improve
The human-computer interactions impression such as touch screen writing, scribing line.
To be illustrated more clearly that scheme that the application previous embodiment provides, it is based on invention structure same as the above method
Think, the embodiment of the present application also proposed a kind of infrared touch panel, and structural schematic diagram is as shown in figure 8, specifically include:
Rules administration module 81, for presetting a variety of scanning rules；
Scan module 82 is used in present scanning cycle, according in the currently active rules administration module 81
Scanning rule carry out screen scanning；
Location information determining module 83, for counting the scan module 82 to screen scanning as a result, determining current touching
Touch location information a little；
Motion information determining module 84, for current touch point determined by determining module 83 according to the positional information
The location information of location information and the current touch point within a upper scan period, determines the movement of the current touch point
Information；
Selecting module 85, the movement for the current touch point according to determined by the motion information determining module 84
Information selects to be activated in next scan period in the preset a variety of scanning rules of the rules administration module 81
Scanning rule；
Active module 86 for activating the selected scanning rule of the selecting module 85, and notifies the scan module
82 start next scan period.
Preferably, in the infrared touch panel for having preset a variety of scanning rules, a kind of default scan rule is specifically included:
The active module 86 is also used to activate in the rules administration module 81 when the infrared touch panel starts
Default scan rule, and the scan module 82 is notified to start first scan period.
Preferably, the selecting module 85, is specifically used for:
When the motion information of the current touch point according to determined by the motion information determining module 84, determine current
When touch point is the touch point of a high-speed motion, in the preset a variety of scanning rules of the rules administration module 81,
Selection has less scanning optical path number, and the scanning rule in the long short side of the infrared touch panel only one scanning direction
Then, as the scanning rule activated in next scan period；
When the motion information of the current touch point according to determined by the motion information determining module 84, determine current
When touch point is the touch point of multiple high-speed motions, in the preset a variety of scanning rules of the rules administration module 81,
Selection has less scanning optical path number, and includes at least sweeping for two scanning directions in the long short side of the infrared touch panel
Rule is retouched, as the scanning rule activated in next scan period；
When the motion information of the current touch point according to determined by the motion information determining module 84, determine current
When touch point is static or low-speed motion touch point, in the preset a variety of scanning rules of the rules administration module 81
In, the scanning rule with more scanning optical path numbers is selected, as the scanning rule activated in next scan period.
Preferably, the active module 86, is also used to:
When the location information determining module 83 counts the scan module 82 to screen scanning as a result, and determining current
There is no the scanning rules in the rules administration module 81 for when touch point, keeping the currently active, and start next scanning
Period；Or,
When the location information determining module 83 counts the scan module 82 to screen scanning as a result, and determining current
There is no default scan when touch point, activated in the rules administration module 81 rules, and start next scanning week
Phase.
Preferably, the active module 86, is also used to:
When the motion information determining module 84 judges the current touch point, there is no the positions in a upper scan period
When confidence ceases, the scanning rule in the currently active rules administration module 81 is kept, and the scan module 82 is notified to open
Begin next scan period.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The embodiment of the present application discloses the scan method and device of a kind of infrared touch panel, which has preset a variety of
Scanning rule, the location information by current touch point in present scanning cycle and in a upper scan period, determination are deserved
The motion information of preceding touch point selects the scanning rule activated in next scan period accordingly, and selected activating
After scanning rule, starts next scan period continuation screen scanning, pass through the technical side proposed using the embodiment of the present application
Case can determine the state of current touch point, more for different scene switchings by the motion information of analysis current touch point
Add the scanning rule of adaptation, even if can also reduce the problem of occurring losing a little and breaking under the scene that dynamic multipoint touches, reach
To the purpose for the accuracy and user experience for improving touch control.
Through the above description of the embodiments, those skilled in the art can be understood that the embodiment of the present invention
The mode of necessary general hardware platform can also be added to realize by software by hardware realization.Based on such reason
Solution, the technical solution of the embodiment of the present invention can be embodied in the form of software products, which can store one
In a non-volatile memory medium (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are used so that a meter
It calculates machine equipment (can be personal computer, server or network side equipment etc.) and executes each implement scene of the embodiment of the present invention
The method.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
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 device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
The serial number of the above embodiments of the invention is only for description, does not represent the superiority and inferiority of implement scene.
Disclosed above is only several specific implementation scenes of the embodiment of the present invention, and still, the embodiment of the present invention is not office
It is limited to this, the changes that any person skilled in the art can think of should all fall into the business limitation range of the embodiment of the present invention.
Claims (10)
1. a kind of scan method of infrared touch panel, which is characterized in that applied to the infrared touch-control for having preset a variety of scanning rules
In screen, the method is specifically included:
In present scanning cycle, screen scanning is carried out according to the currently active scanning rule；
Statistical screens scanning as a result, determine current touch point location information；
According to the location information of the location information of the current touch point and the current touch point within a upper scan period,
Determine the motion information of the current touch point；
According to the motion information of the current touch point, in preset a variety of scanning rules, next scanning week is selected
The scanning rule activated in phase；
Selected scanning rule is activated, next scan period is started.
2. the method as described in claim 1, which is characterized in that in the infrared touch screen for having preset a variety of scanning rules,
Specifically include a kind of default scan rule:
When infrared touch screen starting, the default scan rule is activated, and start first scan period.
3. method according to claim 2, which is characterized in that the motion information according to the current touch point, pre-
If a variety of scanning rules in, select the scanning rule activated in next scan period, specifically include:
When the motion information according to the current touch point, when determining that current touch point is the touch point of a high-speed motion,
In preset a variety of scanning rules, selection has less scanning optical path number, and in the long short side of the infrared touch screen
The scanning rule of only one equal scanning direction, as the scanning rule activated in next scan period；
When the motion information according to the current touch point, when determining that current touch point is the touch point of multiple high-speed motions,
In preset a variety of scanning rules, selection has less scanning optical path number, and in the long short side of the infrared touch screen
The scanning rule for including at least two scanning directions, as the scanning rule activated in next scan period；
When the motion information according to the current touch point, when determining that current touch point is static or low-speed motion touch point,
In preset a variety of scanning rules, the scanning rule with more scanning optical path numbers is selected, as next scanning
The scanning rule activated in period.
4. method according to claim 2, which is characterized in that it is described in present scanning cycle, it is swept according to the currently active
Retouch rule carry out screen scanning after, further includes:
When statistical screens scanning as a result, and determine there is currently no when touch point, keeping the currently active scanning rule, start
Next scan period；Or,
When statistical screens scanning as a result, and determine there is currently no when touch point, activating default scan rule, under starting
One scan period.
5. the method as described in claim 1, which is characterized in that the statistical screens scan as a result, determining current touch point
Location information after, further includes:
When judging that the current touch point there is no when location information in a upper scan period, kept the currently active scanning
Rule starts next scan period.
6. a kind of infrared touch panel, which is characterized in that specifically include:
Rules administration module, for presetting a variety of scanning rules；
Scan module is used in present scanning cycle, according to the scanning rule in the currently active rules administration module
Then carry out screen scanning；
Location information determining module, for counting the scan module to screen scanning as a result, determining the position of current touch point
Confidence breath；
Motion information determining module, the location information for current touch point determined by determining module according to the positional information
With location information of the current touch point within a upper scan period, the motion information of the current touch point was determined；
Selecting module, for the motion information of the current touch point according to determined by the motion information determining module,
In the preset a variety of scanning rules of rules administration module, the scanning rule activated in next scan period is selected
Then；
Active module, for activating the selected scanning rule of the selecting module, and it is next to notify that the scan module starts
A scan period.
7. infrared touch panel as claimed in claim 6, which is characterized in that the infrared touch for having preset a variety of scanning rules
In screen, a kind of default scan rule is specifically included:
The active module is also used to activate the default in the rules administration module to sweep when the infrared touch panel starts
Rule is retouched, and the scan module is notified to start first scan period.
8. infrared touch panel as claimed in claim 7, which is characterized in that the selecting module is specifically used for:
When the motion information of the current touch point according to determined by the motion information determining module, current touch point is determined
For a high-speed motion touch point when, in the preset a variety of scanning rules of the rules administration module, selection has
Less scanning optical path number, and the scanning rule in the long short side of the infrared touch panel only one scanning direction, as
The scanning rule activated in next scan period；
When the motion information of the current touch point according to determined by the motion information determining module, current touch point is determined
For multiple high-speed motions touch point when, in the preset a variety of scanning rules of the rules administration module, selection has
Less scanning optical path number, and the scanning rule of two scanning directions is included at least in the long short side of the infrared touch panel,
As the scanning rule activated in next scan period；
When the motion information of the current touch point according to determined by the motion information determining module, current touch point is determined
When for static or low-speed motion touch point, in the preset a variety of scanning rules of the rules administration module, selection tool
There is the scanning rule of more scanning optical path numbers, as the scanning rule activated in next scan period.
9. infrared touch panel as claimed in claim 7, which is characterized in that the active module is also used to:
When the location information determining module counts the scan module to screen scanning as a result, and determining that there is currently no touchings
When touching, the scanning rule in the currently active rules administration module is kept, and start next scan period；Or,
When the location information determining module counts the scan module to screen scanning as a result, and determining that there is currently no touchings
When touching, the default scan rule in the rules administration module is activated, and start next scan period.
10. infrared touch panel as claimed in claim 6, which is characterized in that the active module is also used to:
When the motion information determining module judges the current touch point, there is no the location informations in a upper scan period
When, the scanning rule in the currently active rules administration module is kept, and the scan module is notified to start next sweep
Retouch the period.
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| CN106557209B (en) * | 2016-10-28 | 2019-09-17 | 青岛海信电器股份有限公司 | Processing method, device and the terminal device of infrared touch panel touching signals |
| CN109885213A (en) * | 2019-03-11 | 2019-06-14 | 广州视源电子科技股份有限公司 | Touch signal processing method, intelligent interaction plate |
| CN109959666B (en) * | 2019-04-11 | 2021-08-03 | 京东方科技集团股份有限公司 | Array substrate defect judgment method, processor and judgment system |
| CN111475054B (en) * | 2020-05-28 | 2023-10-17 | Tcl华星光电技术有限公司 | Mutual capacitance type touch screen driving method and device and terminal equipment |
| CN117369668A (en) * | 2023-11-20 | 2024-01-09 | 广州众远智慧科技有限公司 | Infrared touch screen scanning method and device and infrared touch screen system |
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Address after: 266555, No. 218, Bay Road, Qingdao economic and Technological Development Zone, Qingdao, Shandong Patentee after: Hisense Video Technology Co., Ltd Address before: 266555, No. 218, Bay Road, Qingdao economic and Technological Development Zone, Qingdao, Shandong Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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