CN105302380B - A kind of touch point acquisition methods, infrared touching device and touch-screen equipment - Google Patents
A kind of touch point acquisition methods, infrared touching device and touch-screen equipment Download PDFInfo
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- CN105302380B CN105302380B CN201510870540.XA CN201510870540A CN105302380B CN 105302380 B CN105302380 B CN 105302380B CN 201510870540 A CN201510870540 A CN 201510870540A CN 105302380 B CN105302380 B CN 105302380B
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Abstract
A kind of touch point acquisition methods, infrared touching device and touch-screen equipment, it is related to technical field of touch control, in the inventive solutions, in the scanning result according to the first scanning direction, after getting candidate touch point, the scanning result for not directlying adopt the second scanning direction carries out ghost, but first judge whether candidate touch point is located in the optical path on the second scanning direction, if candidate touch point is located in the optical path of the second scanning direction, ghost is carried out using the scanning result of the second scanning direction again, if touch point is not in the optical path of the second scanning direction, i.e., touch point is located in the scan blind spot between the optical path on the second scanning direction, then candidate touch point is exported as true point, it avoids because candidate touch point is located at caused by the scan blind spot of the second scanning direction the case where removing true touch point, it improves The acquisition precision really put.
Description
Technical field
The present invention relates to technical field of touch control more particularly to a kind of touch point acquisition methods, infrared touching device and touch screen
Equipment.
Background technique
Nowadays, touch display screen is widely used to the various aspects of social life.Touch display screen only needs user by hand
Refer to that icon or text on touching display screen can be achieved with operating, keeps human-computer interaction more simple and direct.According to the work of touch screen
Make principle and transmit the medium of information, touch screen is generally divided into four kinds, respectively resistance-type, capacitor induction type, infrared-type with
And surface acoustic wave type.Wherein, infrared touch panel is suitable for severe environmental conditions, is touch screen not by electric current, voltage and electrostatic interference
The development trend of product.
As shown in Figure 1, being a kind of existing infrared touching device structural schematic diagram, which includes display
The touching box of screen and setting face on a display screen, touching box include first direction while and when second direction, first direction side includes
The first opposite light emitting is at 11 and the first light-receiving and the second opposite light emitting is at 13 and the second light-receiving 14, the
One light emitting at 11 and the second light emitting 13 on be provided with infrared emission component, the first light-receiving is at 12 and the second light-receiving
Infrared receiver component is provided on 14.Infrared emission component issues infrared signal and forms light net, when a finger is touching the screen, finger
Will block the infrared signal by the position at touch location, thus the infrared receiver component of corresponding conducting do not receive it is red
External signal, processor according to this at positioning touch point in the position of screen.
Existing infrared touch frame is in rectangle, and conventional red outside line location algorithm is according to the long short side in the first scanning direction just side of sweeping
The optical path that is blocked in is orthogonal to obtain candidate touch point, and removes ghost using whether the light of the second scanning direction is blocked
Point, true point of inventor's discovery in candidate touch point can also have by follow up scan direction the case where as ghost point removal, this
It is that technical staff is suffered from a problem that.
Summary of the invention
The embodiment of the present invention provides a kind of touch point acquisition methods, infrared touching device and touch-screen equipment, provides one
The new touch point methods of kind can accurately realize the positioning of touch point.
The present invention provides a kind of touch point acquisition methods to obtain and wait including the scanning result according to the first scanning direction
Select touch point；Judge whether the candidate touch point is located in the optical path of the second scanning direction；If so, then according to the second scanning
The scanning result in direction removes terrible point；If not, it is determined that the candidate touch point is true point.
The present invention also provides a kind of infrared touching devices, comprising: display screen and infrared touch frame, further includes: candidate's touching
An acquiring unit is touched, for the scanning result according to the first scanning direction on infrared touch frame, obtains candidate touch point；Matching is single
Member, for judging whether the candidate touch point is located at the blind area of the second scanning direction；Terrible unit is removed, in the candidate touching
When touching a little in the optical path of the second scanning direction, terrible point is removed according to the scanning result of the second scanning direction；Output unit is used
When not being located in the optical path of the second scanning direction in the candidate touch point, determine that the candidate touch point is true point.
The present invention also provides a kind of touch-screen equipments, including power supply unit, further include above-mentioned infrared touching device.
In the inventive solutions, in the scanning result according to the first scanning direction, get candidate touch point it
Afterwards, the scanning result for not directlying adopt the second scanning direction carries out ghost, but first judges whether candidate touch point is located at the
In optical path on two scanning directions, if candidate touch point is located in the optical path of the second scanning direction, then the second scanning side is used
To scanning result carry out ghost, if touch point is not in the optical path of the second scanning direction, that is, touch point be located at second
In the scan blind spot between optical path on scanning direction, then candidate touch point is determined as true point, avoided because candidate touch
The case where point removes true touch point caused by the scan blind spot of the second scanning direction improves the acquisition essence really put
Degree.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of infrared touching device；
Fig. 2 a is a kind of method flow diagram provided in an embodiment of the present invention；
Fig. 2 b has a kind of method flow diagram to be provided in an embodiment of the present invention；
Fig. 3 is the scanning schematic diagram on first direction side in the first scanning direction in the embodiment of the present invention；
Fig. 4 is the scanning schematic diagram on second direction side in the first scanning direction in the embodiment of the present invention；
Fig. 5 is the schematic diagram that the candidate touch point of the first scanning direction is obtained in the embodiment of the present invention；
Fig. 6 is that candidate touch point is located at a schematic diagram in the optical path of the second scanning direction in the embodiment of the present invention；
Fig. 7 is that candidate touch point is located at another schematic diagram in the optical path of the second scanning direction in the embodiment of the present invention；
Fig. 8 is that candidate touch point is not located at a schematic diagram in the optical path of the second scanning direction in the embodiment of the present invention；
Fig. 9 is that candidate touch point is not located at another signal in the optical path of the second scanning direction in the embodiment of the present invention
Figure；
Figure 10 is the structural schematic diagram of infrared touching device in the embodiment of the present invention；
Figure 11 is the structural schematic diagram of touch-screen equipment in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Infrared touch frame include first direction while and when second direction, first direction side includes the first light hair being oppositely arranged
It penetrates at 11 and the first light-receiving 12, second direction is when including the second light emitting being oppositely arranged 13 and the second light-receiving side
14, the first light emitting at 11 and the second light emitting 13 on be provided with light emitting lamp, to emit infrared light, the first light-receiving side
12 and second are provided with light-receiving lamp on light-receiving side 14, generate voltage value to receive infrared light, light emitting lamp issues red
UV light can be arranged on the reception of the light-receiving lamp on its opposite side, and it is right that the light that a light emitting lamp issues can at least cover its
A light-receiving lamp on side.When being scanned, by taking first direction side as an example: conducting light emitting lamp, and be connected and be located at light hair
At least one light-receiving lamp in the coverage area of shot-light, what is be such as connected is the light-receiving lamp of light emitting lamp axial direction, then it is formed
Be one 90 ° of optical path, if conducting be it is other receive lamp, the scanning direction of the optical path formed is above-mentioned light emitting
The angle of line and first direction side that lamp and the light-receiving lamp are formed.The determination of the scanning angle on first direction side is usually with
One direction side is reference, and those skilled in the art can also select other reference directions.
One scanning direction include first group of parallel light path being scanned on first direction side with the first predetermined angle and
The second group of parallel light path carried out on second direction side with the second predetermined angle.Wherein, the first predetermined angle can be identical, can also
With difference.Common, for convenience of calculating and handling, the first predetermined angle often uses identical value with the second predetermined angle.It lifts
For example, the first scanning direction may include the first group of parallel light path and second being scanned on first direction side with 90 ° of angles
Second group of parallel light path being scanned on the side of direction with 90 ° of angles, certainly, those skilled in the art equally can be by above-mentioned angles
It is set as other values, but in the same scanning direction on same direction side, all optical paths are the optical path being parallel to each other.?
In the optical path being parallel to each other, cannot be referred to as by the region that light-receiving component detects between adjacent two optical paths is scanned blind
Area.
Scanning on the side of one direction can use one-to-one scanning, that is, be connected while one light emitting lamp of conducting
One light-receiving lamp can also use one-to-many scanning, that is, conducting one light emitting lamp while be connected two or two with
On light-receiving lamp.To how carrying out the scanning of optical path without limitation in this case, but should at least obtain two or two with
The scanning result of upper scanning direction, to carry out the removal of terrible point.
The embodiment of the invention provides a kind of acquisition methods of touch point, are applied to infrared touching device, infrared touch dress
The infrared touch frame set be provided with first direction while and when second direction, multiple scanning directions can be carried out during the scanning process
Scanning；As shown in Fig. 2, the localization method includes:
Step S101, according to the scanning result of the first scanning direction, candidate touch point is obtained.
The above-mentioned scanning result according to the first scanning direction obtains candidate touch point specifically: S1011 is received according to first
Each light-receiving lamp on side generated voltage value on the first scanning direction, determines between the first reception side and the first transmitting side
The position of the first touch area that is blocked of optical path, the first transmitting side is oppositely arranged with the first reception side；S1012 is according to second
Each light-receiving lamp on reception side generated voltage value on the first scanning direction, determines the second reception side and the second transmitting side
Between the position of the second touch area that is blocked of optical path, the second transmitting side is oppositely arranged with the second reception side；S1013 according to
The position of the position of first touch area and second touch area seeks common ground, and generates candidate touch point.
Concretely, scanning result is optical path on the scanning direction determined according to the voltage value that light-receiving component goes out
The situation whether being blocked.The optical path and second direction being blocked on first direction side are determined according to the result of the first scanning direction
The optical path being blocked on side；According to first direction in the upper optical path and second direction being blocked on the optical path that is blocked ask friendship
Collection determines candidate touch point.
The scanning result of first scanning direction includes: the scanning result and in a scan period, on first direction side
Scanning result on two directions side, when being particularly first light-receiving of the first direction on light-receiving lamp caused by
Voltage value caused by light-receiving lamp on when the second light-receiving in of voltage value and second direction, according to above-mentioned voltage value
With the comparison of preset threshold, it can know whether optical path is blocked, it is right if above-mentioned voltage value is less than or equal to preset threshold
The optical path answered is blocked, its corresponding optical path is not blocked if above-mentioned voltage value is greater than preset threshold.Principle among these
It is, in an optical path, that is, if there is touch point between the corresponding light emitting lamp of optical path and light-receiving lamp, then can enter light
The blocking without can enter light-receiving lamp of touch point can be should be by receiving at least part in the light of lamp, and light-receiving lamp is caused to produce
Raw voltage reduces, voltage drop as low as to a certain degree when, it is believed that the optical path is blocked.If there is no touch for the optical path
Point, the then voltage that light-receiving lamp generates in optical path will not be obviously reduced.Therefore it says, it can be by judging the voltage at light-receiving lamp
Value determines whether optical path is blocked.For example, the scanning in the first scanning direction as shown in Figure 3 on first direction side,
Scanning in the first scanning direction as shown in Figure 4 on second direction side is axis in all first scanning directions of this exemplary illustration
To scanning, that is, the angle of the scanning direction in first direction side and second direction face is 90 °, according to the first light-receiving side and
The voltage value generated at two light-receiving side light reception lamps, to determine light-receiving lamp and simultaneously between the light emitting lamp that is connected
Optical path whether be blocked.As shown in figure 5, the voltage value generated at light-receiving lamp 141 and light-receiving lamp 121 is less than default threshold
Value, since light emitting lamp 111 and light-receiving lamp 121 simultaneously turn on, light emitting lamp 131 is simultaneously turned on light-receiving lamp 141, because
This, the optical path 401 between light emitting lamp 111 and light-receiving lamp 121 is blocked, and is located at light emitting lamp 131 and light-receiving lamp
Optical path 402 between 141 is blocked.Technical principle therein is, when light in the optical path is blocked, light-receiving lamp is received
To light reduce and even do not receive light completely, so light-receiving component goes out the voltage value generated and can reduce, or even become
0, therefore it can be concluded that, when the voltage that the light-receiving lamp in optical path generates is less than predetermined threshold, optical path is blocked.Since light connects
Receiving the light beam that lamp receives has one fixed width, therefore the amount of voltage value reduction and light dredge the width being blocked and is positively correlated,
When light beam has been blocked predetermined width, light-receiving lamp goes out the voltage value generated and is less than preset threshold, thinks that optical path is hidden at this time
Gear.
Further, in infrared scan, the region that the optical path being continuously blocked is enclosed is defined as touch area,
The intersection of touch area can be used for asking candidate touch point on different directions side, and touch area can also be used to determine the true of touch point
It is false.During seeking touch point according to touch area, first optical path in optical path being continuously blocked is referred to as initial
Optical path, if it is N, N is more than or equal to 2, then the initial optical path of touch area is defined as N-1, the optical path that is continuously blocked it is last
One optical path, which is referred to as, terminates optical path, if termination optical path is M, M is less than the maximum optical path number on direction side, then by touch area
Termination optical path be defined as M+1.Extension in this way can be to avoid institute in the scan blind spot adjacent with original touch region
The situation that existing touch point is not scanned, improves scanning accuracy.
Therefore it says, in the determining first optical path for receiving between side and the first transmitting side is blocked in S1011 step first
The position of touch area specifically: if first article of optical path in the optical path being continuously blocked is the M articles optical path, the last item optical path
For the N articles optical path, wherein 1 < M≤N < MAX1, MAX1 are the maximum optical path number between the first reception side and the first transmitting side；With
Beginning boundary of the M-1 articles optical path as the first touch area, using the N+1 articles optical path as the termination side of the first touch area
Boundary, to export first touch area.Determining that second receives the optical path quilt between side and the second transmitting side in S1012 step
The position for the second touch area blocked specifically: if first optical path in the optical path being continuously blocked is I optical path, most
Latter article of optical path is the J articles optical path, wherein 1 < I≤J < MAX2, MAX2 are the maximum between the second reception side and the second transmitting side
Optical path number；Using -1 optical path of I as the beginning boundary of the second touch area, using the J+1 articles optical path as the second touch area
Termination boundary, to export second touch area.
Due to being provided with a referential inside each touching box, each light emitting lamp and each light are connect in the referential
The position that lamp has oneself to fix is received, the position of optical path can be determined according to the position of light emitting lamp and light-receiving lamp.In determination
After the position for the optical path being blocked, first direction in the upper optical path being blocked and second direction on the light being blocked
Road seeks common ground, that is, can determine candidate touch point.
Since light emitting lamp and light-receiving lamp have certain size, while in the production process between light-receiving lamp and light
Certain gap is had between emission lamp to exist, therefore will lead to the region between optical path and optical path there are one fixed width, referred to as
In order to more obtain candidate touch point, prevent the contact in the scan blind spot of the first scanning direction from not showed by method, herein
Voltage value assignment can be carried out to the position of scan blind spot, making it is considered as the light being blocked in subsequent treatment process
Road.Think that scan blind spot goes out there are a virtual optical path, the voltage value that light-receiving component generates in optical path is less than preset threshold,
Therefore there are true touch points in scan blind spot.
Therefore, the scan blind spot assignment between the first reception side and the first transmitting side, and each of side is received according to first
Light-receiving lamp generated voltage value on the first scanning direction determines the optical path quilt between the first reception side and the first transmitting side
The position for the first touch area blocked, wherein first transmitting side is oppositely arranged with first reception side, the scanning
Region of the blind area between adjacent optical path；Scan blind spot assignment between side and the second transmitting side is received for second, and according to second
Each light-receiving lamp on reception side generated voltage value on the first scanning direction, determines the second reception side and the second transmitting side
Between the position of the second touch area that is blocked of optical path, wherein it is opposite that second transmitting side with described second receives side
Setting；It is sought common ground according to the position of the position of first touch area and second touch area, generates candidate touch point.
It will increase many candidate touch points in this way, but can guarantee that the touch point positioned at blind area can be also acquired, such as
Fruit does not get in the first scanning direction change the time if, due to follow up scan direction treatment process be go terrible process, because
This not will increase new candidate touch point, so can will be located at the point for touching blind area to omitting.The ghost point more obtained can be with
It is removed in the judgement in follow up scan direction, is conducive to obtain more true points.
Step S102, judge whether candidate touch point is located in the optical path of the second scanning direction.
Optical path is that have certain width, and generally, the position of optical path can be according to light emitting lamp and light-receiving lamp
Position and predetermined width determine, i.e., when light within predetermined width can enter light-receiving lamp, which issues
Light in the light-receiving lamp had no idea in the light of the part except optical path into optical path, due on same direction side
In same scanning direction be one group of parallel optical path, since light emitting lamp and light-receiving lamp are independent optics light group respectively
Part, therefore can have certain gap, this will lead to the scan blind spot organized at this and generate one fixed width between parallel optical path.
After getting above-mentioned candidate touch point, the position of touch point can be obtained, while can be according to the second scanning side
The position of each optical path in, determines whether candidate touch point is located in the optical path of the second scanning direction.Institute in second scanning direction
The optical path that the optical path difference that includes and the first scanning direction are included, i.e. the angle of optical path is different from first in the second scanning direction
The optical path of scanning direction.
For example, it can be pushed away using algorithm is counter, as shown in Figure 6 and Figure 7, solid line with the arrow indicates the position of optical path
It sets, the dotted line of solid line two sides states the width of light beam of this optical path.The determination of touch point, which can be, obtains one using the intersection of optical path
Coordinate points, and certain radius is assigned to the coordinate points, to obtain candidate contact；One can also be obtained using the intersection of light beam
Region is as a candidate touch point；It equally can also be used other schemes well known to those skilled in the art, the present invention is herein not
It is limited, by taking Fig. 6 as an example, candidate touch point is candidate touch point acquired in Fig. 5, and center is x=a, y=b, half
Diameter is r.Therefore it would know that the position on candidate touch point boundary by calculating.Judging whether candidate touch point is located at the second scanning
When the scan blind spot in direction, it is possible to determine that whether above-mentioned candidate touch point 201 is located in the optical path of the second scanning direction, if it is not,
Then it is located at the scan blind spot of the second scanning direction, if so, being located in the optical path of the second scanning direction.In above-mentioned deterministic process
In, optical path can use the position of a line, i.e. the position of solid line with the arrow in Fig. 6, can also be using the light for calculating optical path
The mode of beam position, i.e. region represented by the dotted line of solid line two sides in Fig. 7.
Step S103, if so, removing terrible point according to the scanning result of the second scanning direction；If it is not, then, determining the time
Selecting touch point is true point.
Situation as shown in Figure 6 and Figure 7, i.e., candidate touch point are located at the situation in the optical path of the second scanning direction, at this time
Ghost point, which is removed, according to the scanning result of the second scanning direction includes: S1031 judges whether the optical path of the second scanning direction is described
It blocks candidate touch point；If S1032 is blocked, it is determined that the candidate touch point is true point, if not blocking, it is determined that the candidate
Touch point is terrible point.
Illustratively, judge whether optical path 403 is blocked according to the voltage value at light-receiving lamp 122, optical path 403 is hidden
Gear, it is determined that candidate touch point is really to put and export, and candidate touch point is determined if not being blocked for terrible point, and subsequent
Judgement week does not pay attention to, to reduce the calculation amount of entire calculating process.Before determining that candidate touch point is true point, it can also wrap
A judgment step S1033 is included, judges whether there is untreated scanning direction, and the second scanning side is substituted with new scanning direction
To, and if it exists, then new scanning direction is handled according to step 102, if it does not exist, it is determined that candidate touch point is true
Point, and export.
Situation as shown in Figure 8 and Figure 9, i.e. scanning ray on the second scanning direction, can without candidate touch point
Being judged using optical path, it is also possible to be judged using light-beam position.If the scanning light on the second scanning direction
Line is without candidate touch point, it is determined that candidate touch point is true point.Further, determine that candidate touch point is really to put it
Before, it can also include a judgment step S1033, judge whether there is untreated scanning direction, and if it exists, then according to step
102 pairs of new scanning directions are handled, and substitute the second scanning direction with new scanning direction, if it does not exist, it is determined that are waited
Selecting touch point is true point, and is exported.
The present invention also provides a kind of infrared touching devices, comprising: display screen, infrared touch frame, candidate touch point obtain
Module, matching primitives module, output unit,
Infrared touch frame, for executing infrared scan, specifically.
Candidate touch point obtains module and is used for, and according to the scanning result of the first scanning direction on infrared touch frame, obtains and waits
Select touch point.
Candidate touch point obtains module according to the scanning result of the first scanning direction, obtains candidate touch point detailed process
Are as follows: according to first receive side each light-receiving lamp on the first scanning direction generated voltage value, determine the first reception side
And the position of the first touch area that the first optical path between transmitting side is blocked, the first transmitting side receive that side is opposite to be set with first
It sets；According to second receive side each light-receiving lamp on the first scanning direction generated voltage value, determine the second reception side
And the position of the second touch area that the second optical path between transmitting side is blocked, the second transmitting side receive that side is opposite to be set with second
It sets；It is sought common ground according to the position of the position of first touch area and second touch area, generates candidate touch point.
Further, during candidate touch point obtains module and obtains candidate touch point, the first reception is determined
The position for the first touch area that optical path between side and the first transmitting side is blocked specifically: if in the optical path being continuously blocked
First article of optical path be the M articles optical path, the last item optical path is the N articles optical path, wherein 1 < M≤N < MAX1, MAX1 are first to connect
Receive the maximum optical path number between side and the first transmitting side；Using the M-1 articles optical path as the beginning boundary of the first touch area, with
Termination boundary of the N+1 optical path as the first touch area, to export first touch area.Determine the second reception side and
The position for the second touch area that optical path between two transmitting sides is blocked specifically: if first in the optical path being continuously blocked
Optical path is I optical path, and the last item optical path is the J articles optical path, wherein 1 < I≤J < MAX2, MAX2 be second receive side and
Maximum optical path number between second transmitting side；Using -1 optical path of I as the beginning boundary of the second touch area, with the J+1 articles
Termination boundary of the optical path as the second touch area, to export second touch area.
Further, candidate point obtains module and can also assign for the scan blind spot between the first reception side and the first transmitting side
Value, and according to first receive side each light-receiving lamp on the first scanning direction generated voltage value, determine the first reception side
The position of the first touch area that the first optical path between transmitting side is blocked and, wherein first transmitting side and described the
One reception side is oppositely arranged, region of the scan blind spot between adjacent optical path；For second receive side and the second transmitting side it
Between scan blind spot assignment, and according to second receive side each light-receiving lamp on the first scanning direction generated voltage value,
Determine the position for the second touch area that the optical path between the second reception side and the second transmitting side is blocked, wherein described second
Transmitting side is oppositely arranged with second reception side；According to the position of first touch area and second touch area
Position seeks common ground, and generates candidate touch point.
Candidate touch point obtains module after getting candidate touch point, and the coordinate of candidate touch point is sent to matching mould
Block,
Matching module is used for, and judges whether candidate touch point is located in the optical path of the second scanning direction.
Matching module, can be according to optical path each in the second scanning direction after the coordinate for receiving above-mentioned candidate touch point
Position, determines whether candidate touch point is located in the optical path of the second scanning direction.Optical path included in second scanning direction is not
With the optical path for being included with the first scanning direction, i.e. the angle of optical path is different from the light of the first scanning direction in the second scanning direction
Road.
For example, it can be pushed away using algorithm is counter, as shown in Figure 6 and Figure 7, solid line with the arrow indicates the position of optical path
It sets, the dotted line of solid line two sides states the width of light beam of this optical path.The determination of touch point, which can be, obtains one using the intersection of optical path
Coordinate points, and certain radius is assigned to the coordinate points, to obtain candidate contact；One can also be obtained using the intersection of light beam
Region is as a candidate touch point；It equally can also be used other schemes well known to those skilled in the art, the present invention is herein not
It is limited, by taking Fig. 6 as an example, candidate touch point is candidate touch point acquired in Fig. 5, and center is x=a, y=b, half
Diameter is r.Therefore it would know that the position on candidate touch point boundary by calculating.Judging whether candidate touch point is located at the second scanning
When the scan blind spot in direction, it is possible to determine that whether above-mentioned candidate touch point 201 is located in the optical path of the second scanning direction, if it is not,
Then it is located at the scan blind spot of the second scanning direction, if so, being located in the optical path of the second scanning direction.In above-mentioned deterministic process
In, optical path can use the position of a line, i.e. the position of solid line with the arrow in Fig. 6, can also be using calculating light-beam position
Mode, i.e. region represented by the dotted line of solid line two sides in Fig. 7.
Terrible unit is removed, when in the optical path that candidate touch point is located at the second scanning direction, according to the second scanning direction
Scanning result remove terrible point.
The ghost operation of going for removing terrible unit can be to judge whether the optical path of the second scanning direction is hidden by the candidate touch point
Gear；If blocking, the first identification information value output unit is exported, if not blocking, it is determined that the candidate touch point is terrible point.Its
In the first identification information for making output unit determine candidate's touch point true point corresponding with the first identification information.Certainly,
Those skilled in the art can also go terrible scheme to carry out ghost using others, and the present embodiment is it is not limited here.
Output unit, for determining candidate touching when the candidate touch point is not located in the optical path of the second scanning direction
Touching a little is true point.
Output unit is also used to, and after the first identification information for receiving terrible unit output, determines the candidate touch point
It is true point, and exports.
Further, before determining that candidate touch point is true point, it can also include a deterministic process, sentence output unit judgement
With the presence or absence of untreated scanning direction, and if it exists, then handle according to step 102 new scanning direction, and with new
Scanning direction substitutes the second scanning direction, if it does not exist, it is determined that candidate touch point is true point.
A kind of touch-screen equipment, including power supply unit and any one of the above infrared touching device are additionally provided by invention.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of touch point acquisition methods, which is characterized in that
According to the scanning result of the optical path of the first scanning direction, candidate touch point is obtained；
Judge whether the candidate touch point is located in the optical path of the second scanning direction；
If so, removing terrible point according to the scanning result of the optical path of the second scanning direction；If not, it is determined that the candidate touch point
It is true point；
Wherein, the optical path of the first scanning direction includes the optical path and second direction that at least one set on first direction side is parallel to each other
The optical path that at least one set on side is parallel to each other, the optical path of the second scanning direction include being different from the first scanning on first direction side
It is different from the optical path of the first scanning direction extremely in optical path that at least one set of the optical path in direction is parallel to each other and second direction side
Few one group of optical path being parallel to each other.
2. method as described in claim 1, which is characterized in that
Described, removing ghost point according to the scanning result of the optical path of the second scanning direction includes:
Judge whether the optical path of the second scanning direction is blocked by the candidate touch point；
If blocking, it is determined that the candidate touch point is true point, if not blocking, it is determined that the candidate touch point is terrible point.
3. method as described in claim 1, which is characterized in that
It is described to judge whether the candidate touch point is located in the optical path of the second scanning direction, including
According to the position of each optical path in the coordinate of the candidate touch point and second scanning direction, the candidate touch is judged
Whether point is located in the optical path of the second scanning direction.
4. such as claim 1-3 any one the method, which is characterized in that
The determination candidate touch point is true point, specifically:
Determine whether there is the optical path of untreated scanning direction；
If it exists, then judge whether the candidate touch point is located in the optical path of the untreated scanning direction, if it does not exist,
Then determine that the candidate touch point is true point.
5. method as claimed in claim 4, which is characterized in that
The scanning result of the optical path according to the first scanning direction obtains candidate touch point specifically:
According to first receive side each light-receiving lamp in the optical path of the first scanning direction generated voltage value, determine first
Receive the position for the first touch area that the optical path between side and the first transmitting side is blocked, first transmitting side and described the
One reception side is oppositely arranged；
According to second receive side each light-receiving lamp in the optical path of the first scanning direction generated voltage value, determine second
Receive the position for the second touch area that the optical path between side and the second transmitting side is blocked, second transmitting side and described the
Two reception sides are oppositely arranged；
It is sought common ground according to the position of the position of first touch area and second touch area, generates candidate touch point.
6. method as claimed in claim 5, which is characterized in that
The determination first receives the position for the first touch area that the optical path between side and the first transmitting side is blocked specifically:
If first article of optical path in the optical path being continuously blocked is the M articles optical path, the last item optical path is the N articles optical path, wherein
1 < M≤N < MAX1, MAX1 are the maximum optical path number between the first reception side and the first transmitting side；
Using the M-1 articles optical path as the beginning boundary of the first touch area, using the N+1 articles optical path as the end of the first touch area
Only boundary, to export first touch area；
The determination second receives the position for the second touch area that the optical path between side and the second transmitting side is blocked specifically:
If first optical path in the optical path being continuously blocked is I optical path, the last item optical path is the J articles optical path, wherein
1 < I≤J < MAX2, MAX2 are the maximum optical path number between the second reception side and the second transmitting side；
Using -1 optical path of I as the beginning boundary of the second touch area, using the J+1 articles optical path as the end of the second touch area
Only boundary, to export second touch area.
7. method as claimed in claim 5, which is characterized in that
The scanning result of the optical path of first scanning direction obtains candidate touch point, comprising:
Scan blind spot assignment between side and the first transmitting side is received for first, and is existed according to each light-receiving lamp on the first reception side
Generated voltage value in the optical path of first scanning direction determines that the optical path between the first reception side and the first transmitting side is blocked
The first touch area position, wherein first transmitting side with it is described first reception side be oppositely arranged, the scan blind spot
Region between adjacent optical path；
Scan blind spot assignment between side and the second transmitting side is received for second, and is existed according to each light-receiving lamp on the second reception side
Generated voltage value in the optical path of first scanning direction determines that the optical path between the second reception side and the second transmitting side is blocked
The second touch area position, wherein second transmitting side with it is described second reception side be oppositely arranged；
It is sought common ground according to the position of the position of first touch area and second touch area, generates candidate touch point.
8. a kind of infrared touching device, comprising: display screen and infrared touch frame, which is characterized in that further include:
Candidate touch point acquiring unit is obtained for the scanning result according to the optical path of the first scanning direction on infrared touch frame
Candidate touch point；
Matching unit, for judging whether the candidate touch point is located at the blind area of the second scanning direction；
Terrible unit is removed, when the candidate touch point is located in the optical path of the second scanning direction, according to the light of the second scanning direction
The scanning result on road removes terrible point；
Output unit, for determining the candidate touching when the candidate touch point is not located in the optical path of the second scanning direction
Touching a little is true point；
Wherein, infrared touch frame include first direction while and when second direction, the optical path of the first scanning direction includes first direction
The optical path that at least one set in the optical path and second direction that upper at least one set is parallel to each other is parallel to each other, the second scanning side
To optical path include optical path on first direction side different from the first scanning direction the optical path that is parallel to each other of at least one set and the
The optical path being parallel to each other on two directions side different from at least one set of the optical path of the first scanning direction.
9. infrared touching device as claimed in claim 8, which is characterized in that
The scanning result of the optical path according to the second scanning direction removes terrible point specifically:
Go whether the optical path of terrible the second scanning direction of unit judges is blocked by the candidate touch point；
If blocking, the first identification information is issued to the output unit, so that the output unit output candidate touch
Point is true point, if not blocking, it is determined that the candidate touch point is terrible point；
The output unit is also used to, and receives the first identification information, and determines that the candidate touch point is true point.
10. a kind of touch-screen equipment, including power supply unit, which is characterized in that
It further include the infrared touching device as described in claim 8 or 9 any one.
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| CN105607786B (en) * | 2016-03-14 | 2018-11-02 | 青岛海信电器股份有限公司 | A kind of recognition methods of touch point and infrared touch device |
| CN106020565A (en) * | 2016-04-20 | 2016-10-12 | 广州华欣电子科技有限公司 | Double-side infrared touch screen and infrared touch screen scanning method |
| CN106775091B (en) * | 2016-12-21 | 2022-04-01 | 北京汇冠触摸技术有限公司 | Simulation analysis method for positioning accuracy of infrared touch screen |
| CN110275645B (en) * | 2019-06-12 | 2022-08-05 | 青岛海信商用显示股份有限公司 | Touch point identification method, touch point identification device, storage medium and touch device |
| CN110968222B (en) * | 2019-12-13 | 2024-02-06 | 深圳市康冠商用科技有限公司 | Infrared touch screen tracking scanning method and device, electronic equipment and storage medium |
| CN110989874B (en) * | 2019-12-13 | 2024-01-09 | 深圳市康冠商用科技有限公司 | Infrared touch signal acquisition method and device, electronic equipment and storage medium |
| CN114415864B (en) * | 2020-10-13 | 2024-02-02 | 青岛海信商用显示股份有限公司 | Touch area determining method and display device |
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