CN106020565A - Double-side infrared touch screen and infrared touch screen scanning method - Google Patents
Double-side infrared touch screen and infrared touch screen scanning method Download PDFInfo
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- CN106020565A CN106020565A CN201610248845.1A CN201610248845A CN106020565A CN 106020565 A CN106020565 A CN 106020565A CN 201610248845 A CN201610248845 A CN 201610248845A CN 106020565 A CN106020565 A CN 106020565A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002146 bilateral effect Effects 0.000 claims description 37
- 238000010304 firing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 23
- 230000006872 improvement Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a double-side infrared touch screen, comprising an infrared touch frame and a touch region. A first frame edge and a second frame edge of the infrared touch frame, the frame edges being opposite, are respectively uniformly fully distributed with infrared transmitting tubes and infrared receiving tubes. The infrared transmitting tubes and the infrared receiving tubes are arranged opposite to each other. The touch region comprises a first edge and a second edge which are parallel to the first frame edge and the second frame edge. The lengths of the first edge and the second edge are smaller than the lengths of the first frame edge and the second frame edge. The invention also discloses an infrared touch screen scanning method suitable for the double-side infrared touch screen. The double-side infrared touch screen and the infrared touch screen scanning method can effectively reduce side effect of low infrared ray density in a conventional double-side infrared touch screen.
Description
Technical field
The present invention relates to touch screen field, particularly relate to a kind of bilateral infrared touch screen and infrared touch panel scanning
Method.
Background technology
As a branch of computer touch screen, infrared touch panel is low with its production cost, easy for installation,
The advantages such as high anti-knock properties, freedom from repairs and be widely used in every field.Generally, infrared touch panel includes touching
Touch frame and be arranged on touch frame four limits on infrared transmitting tube and infrared receiving tube, and infrared transmitting tube and
Infrared receiving tube one_to_one corresponding is arranged.In the case of there is no touch objects, infrared transmitting tube and infrared receiving tube
Between light form the light net in X, Y-direction in touch area；When there being touch objects, touch objects can be right
Light causes and blocks, and in the region being blocked, infrared receiving tube does not receives infrared light or can only receive
The most weak infrared light, can orient touch according to the signal sampling value of X-direction and the infrared receiving tube of Y-direction
The coordinate of thing.
Existing infrared touch panel typically on four frame limits all dense arrangement infrared tube；Additionally, for reducing
Product cost, also occurs in that a kind of bilateral infrared touch screen, i.e. arranges on two the relative limits touching frame
Infrared transmitting tube and/or infrared receiving tube.But, inventor finds in the practice of the invention: 1, four
On bar frame limit, the mode of all dense arrangement infrared tubes can make the production cost of infrared touch panel higher, especially
Larger-size infrared touch panel；And this mode is not suitable for some special occasions, such as the display of long splicing
Equipment, on two distant opposite side, the infrared signal between infrared transmitting tube and infrared receiving tube may be deposited
In bigger decay, it is unfavorable for steady operation；2, formed on the touch area of traditional bilateral infrared touch screen
Infrared network closeness relatively low, the especially infrared cross point of avris is sparse, touches precision relatively low, constitutes double
The blind area of limit infrared touch panel, i.e. " avris effect ".
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of bilateral infrared touch screen and infrared touch panel
Scan method, it is possible to effectively reduce " the avris that the avris infrared ray closeness of traditional bilateral infrared touch screen is low
Effect ".
For achieving the above object, embodiments provide a kind of bilateral infrared touch screen, including: infrared
Touch frame and touch area；On two the first relative frame limits of described infrared touch frame and the second frame limit respectively
Uniformly it is covered with infrared transmitting tube and infrared receiving tube, described infrared transmitting tube and described infrared receiving tube phase one by one
To setting；
Described touch area includes first edge parallel with described first frame limit, the second frame limit and the second edge,
The length at described first edge and the second edge is less than the first frame limit and the length on the second frame limit.
The bilateral infrared touch screen that the embodiment of the present invention provides will be by being respectively equipped with infrared transmitting tube and infrared connect
The length at two edges that the length on two frame limits of closed tube is parallel with these two frame limits more than touch area, because of
When this utilizes infrared transmitting tube and infrared receiving tube to be scanned, light can be covered Petting Area to greatest extent
Territory, it is ensured that there is in touch area identical touch effect such that it is able to effectively reduce traditional bilateral infrared
" avris effect " and therefore the some blind areas that the avris infrared ray closeness of touch screen is low.
As the improvement of such scheme, described touch area is positioned at described infrared touch frame area defined
Central authorities.
As the improvement of such scheme, the maximum of each described infrared transmitting tube is just launching negative with maximum of angle
Maximum positive receiving angle and the maximum of firing angle degree and each described infrared receiving tube bear the size phase of receiving angle
Deng.
As the improvement of such scheme, described infrared touch frame is rectangle frame, described first frame limit and
Two frame limits are the long limit of described infrared touch frame.
As the improvement of such scheme, described first edge, the second edge and described first frame limit, the second frame
The length on limit meets relational expression: (L-l)/2≤h × tan (a)；Wherein, L is described first frame limit, the second frame
The length on limit；L is described first edge, the length at the second edge；H is described first frame limit and the second frame limit
Between distance；A is that the maximum of each described infrared transmitting tube is just launching angle.
As the improvement of such scheme, when (L-l)/2 < during h × tan (a), are arranged on described first frame limit
The angular dimension of first infrared transmitting tube is that at least two scanning angle in b to a is scanned, and sets
At least two put sized by the angle of last infrared receiving tube on described second frame limit in b to a is swept
Retouch angle to be scanned；Or/and, the angle arranging last infrared transmitting tube on described first frame limit is big
Little is that at least two scanning angle in-b to-a is scanned, and arranges first on described second frame limit
The angle of infrared receiving tube is that at least two scanning angle in-b to-a is scanned；Wherein, described angle b
For equal to or less than and closest to the scanning angle of angle arctan ((L-l)/2h).
Embodiment of the present invention correspondence provides a kind of infrared touch panel scan method, it is adaptable to the most double
Limit infrared touch panel, described scan method includes step:
When responding at least one touch objects touch control operation on the touchscreen, start infrared of described touch screen
Penetrate pipe and infrared receiving tube is scanned with maximum positive and negative scanning angle, to obtain the infrared of described touch screen
The light being blocked first between transmitting tube and infrared receiving tube；
The public territory obtained by the described ray intersection being blocked first is as candidate touch point；
The infrared transmitting tube and the infrared receiving tube that start described touch screen are positive and negative with arbitrarily at least one non-maximum
Scanning angle is scanned, to obtain the secondary between infrared transmitting tube and the infrared receiving tube of described touch screen
The light being blocked；
The quantity of the light being blocked through described secondary is defined as more than or equal to the candidate touch point of threshold value
True touch point.
The infrared touch panel scan method that the embodiment of the present invention provides is applicable to bilateral infrared touch screen, wherein,
The length on two the frame limits being respectively equipped with infrared transmitting tube and infrared receiving tube on this bilateral infrared touch screen is more than
The length at two edges that touch area is parallel with these two frame limits, this scan method is by starting touch screen
When infrared transmitting tube and infrared receiving tube are scanned with maximum positive and negative scanning angle, can be by crossing light
Line covers touch area to greatest extent, has identical touch effect such that it is able to have in keeping touch area
Effect reduce the avris infrared ray closeness of traditional bilateral infrared touch screen low " avris effect " and therefore have blind
District.
As the improvement of such scheme, the infrared transmitting tube of the described touch screen of described startup and infrared receiving tube with
Arbitrarily at least one positive and negative scanning angle of non-maximum is scanned, particularly as follows:
The infrared transmitting tube and the infrared receiving tube that start described touch screen are scanned with 0 degree of scanning angle.
As the improvement of such scheme, described threshold value and the quantity starting the described positive and negative scanning angle of non-maximum
It is directly proportional.
As the improvement of such scheme, when (L-l)/2, < during h × tan (a), wherein, L is described first frame
Limit, the length on the second frame limit；L is described first edge, the length at the second edge；H is described first frame limit
And the distance that second between frame limit；A is that the maximum of each described infrared transmitting tube is just launching angle；
Infrared transmitting tube and the infrared receiving tube of the described touch screen of described startup enter with maximum positive and negative scanning angle
Row scanning particularly as follows:
The infrared transmitting tube and the infrared receiving tube that start described touch screen are scanned with the positive scanning angle of maximum,
The angular dimension simultaneously arranging first infrared transmitting tube on described first frame limit is at least two in b to a
Individual scanning angle is scanned, and the angle arranging last infrared receiving tube on described second frame limit is
At least two scanning angle in size b to a is scanned；
The infrared transmitting tube and the infrared receiving tube that start described touch screen are born scanning angle with maximum and are scanned,
Arrange simultaneously the angular dimension of last infrared transmitting tube on described first frame limit be in-b to-a at least
Two scanning angles are scanned, and the angle arranging first infrared receiving tube on described second frame limit is-b
At least two scanning angle to-a is scanned；
Wherein, described angle b be equal to or less than and closest to the scan angle of angle arctan ((L-l)/2h)
Degree.
In embodiments of the present invention, preferred scheme is described first edge, the second edge and described first frame
Limit, the length on the second frame limit meet relational expression: (L-l)/2≤h × tan (a)；Wherein, L is described first frame
Limit, the length on the second frame limit；L is described first edge, the length at the second edge；H is described first frame limit
And the distance that second between frame limit；A is that the maximum of each described infrared transmitting tube is just launching angle.
Most highly preferred embodiment of the invention is described first edge, the second edge and described first frame limit, the second frame
The length on limit meets relational expression: (L-l)/2=h × tan (a), so can ensure that by starting the red of touch screen
When emission pipe and infrared receiving tube are scanned with maximum positive and negative scanning angle, it is possible to by crossing light
Touch area is completely covered, thus there is in ensureing touch area identical touch effect.
In another preferred embodiment of the present invention, if touch screen only meets relational expression (L-l)/2 ＜ h × tan (a),
The infrared transmitting tube by starting touch screen and infrared receiving tube is caused to be swept with maximum positive and negative scanning angle
Retouch, when the light intersected cannot be completely covered touch area, by using first infrared transmitting tube or last
The low-angle of opposite side fluorescent tube is scanned and makes up because touch mask limit and touch edge do not reach by one infrared receiving tube
To requiring that the edge effect caused is long such that it is able to be prevented effectively from " avris effect ".
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, below by use required in embodiment
Accompanying drawing is briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Mode, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of bilateral infrared touch screen that the embodiment of the present invention provides.
Fig. 2 is the scanning angle schematic diagram of a kind of bilateral infrared touch screen that the embodiment of the present invention provides.
Fig. 3 is the structural representation of a kind of bilateral infrared touch screen that the embodiment of the present invention provides, it is shown that touch
Touch the length relation between frame and touch area.
Fig. 4 is the structural representation of a kind of bilateral infrared touch screen that another embodiment of the present invention provides.
Fig. 5 is the flow chart of a kind of infrared touch panel scan method that the embodiment of the present invention provides.
Fig. 6 is carried out in a kind of infrared touch panel scan method that the embodiment of the present invention provides just scanning with maximum
Structural representation when angle is scanned.
Fig. 7 is carried out in a kind of infrared touch panel scan method that the embodiment of the present invention provides with the negative scanning of maximum
Structural representation when angle is scanned.
Fig. 8 be carried out the embodiment of the present invention provide a kind of infrared touch panel scan method after obtain first by
The light schematic diagram blocked.
The candidate that Fig. 9 obtains after being carried out a kind of infrared touch panel scan method that the embodiment of the present invention provides touches
Touch a schematic diagram.
Figure 10 is carried out in a kind of infrared touch panel scan method that the embodiment of the present invention provides with 0 scanning angle
Structural representation when being scanned.
Figure 11 is carried out in a kind of infrared touch panel scan method that the embodiment of the present invention provides with 0 scanning angle
The light schematic diagram that the secondary obtained after being scanned is blocked.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Refer to Fig. 1, be the structural representation of an embodiment of the bilateral infrared touch screen that the present invention provides.
The present embodiment provides a kind of infrared touch panel, and including touching frame 1 and touch area 2, described touch frame 1 includes
The second frame limit 12 that first frame limit 13, frame limit the 11, the 3rd is relative with described first frame limit 11 and with described
The 4th frame limit 14 that 3rd frame limit 13 is relative.
The touch frame 1 of the present embodiment is rectangle frame, and described first frame limit 11 and the second frame limit 12 are institute
State the long limit of infrared touch frame 1.Wherein, described first frame limit 11 is uniformly covered with infrared transmitting tube 111,
Uniformly it is covered with infrared receiving tube 121 on described second frame limit 12, and described infrared transmitting tube 111 is red with described
External closed tube 121 is oppositely arranged one by one.Launching infrared signal by described infrared transmitting tube 111, it is right to control
The infrared receiving tube 121 answered receives signal, thus realizes the scanning to touch point.
Carry out launching light as in figure 2 it is shown, each described infrared transmitting tube 111 is provided with multiple scanning angle,
Such as, in fig. 2, each described infrared transmitting tube 111 is provided with the scanning angle of 7 different angles,
Including 0 angle (the most just sweeping), three angles of forward scan: include 1 angle, 2 angles and a angle,
Three angles of negative sense scanning: include-1 angle ,-2 angles and-a angle.Wherein, a angle and-a angle are divided
It not that maximum positive scanning angle and the maximum of each described infrared transmitting tube 111 bears the scanning angle (angle of departure
Degree), the maximum scan angle of the 111 of each infrared transmitting tube is determined by fluorescent tube characteristic.
In the present embodiment, the maximum of each described infrared transmitting tube 111 is just launching angle transmitting negative with maximum
Maximum positive receiving angle and the maximum of angle and each described infrared receiving tube 121 bear the size phase of receiving angle
Deng.Such as, each described infrared receiving tube 121 is provided with the scanning angle (receiving angle) of 7 different angles,
Including 0 angle (the most just sweeping), three angles of forward scan: include 1 angle, 2 angles and a angle,
Three angles of negative sense scanning: include-1 angle ,-2 angles and-a angle.Wherein, a angle and-a angle are divided
It not that maximum positive scanning angle and the maximum of each described infrared receiving tube 111 bears scanning angle (acceptance angle
Degree).
Referring back to Fig. 1, described touch area 2 is i.e. for the region of user operation, when detecting that user's touch-control should
Corresponding operation is performed during region.In the prior art, typically by described infrared touch frame area defined
All as touch area.And the touch area 2 of the present invention is less than infrared touch frame area defined, institute
State 2, touch area and cover the subregion in described touch frame area defined.Preferably, described tactile
Touch region 2 and be positioned at the central authorities of described touch frame 2 area defined.
Concrete, described touch area 2 is rectangle, including the first edge the 21, the 3rd edge 23 and institute
State the second relative edge 22 of the first edge 21 and fourth edge 24 relative with described 3rd edge 23.
Wherein, the 21, second edge, described first edge 22 and first frame limit the 11, second frame of described touch frame 1
Limit 12 is parallel, and the length at the 21, second edge 22, described first edge is less than the first of described touch frame 1
The length on the 11, second frame limit 12, frame limit.
With reference to Fig. 3, the length at 21, second edge 22, the first edge of described touch area 2 is touched less than described
Touch 11, the second frame limit 12, the first frame limit of frame 1, and the 21, second edge 22, described first edge is with described
The length on the first the 11, second frame limit 12, frame limit meets relationship below:
(L-l)/2≤h×tan (a)；
Wherein, L is the length on the 11, second frame limit 12, described first frame limit；L be described first edge 21,
The length at the second edge 22；H is the distance between described first frame limit 11 and the second frame limit 12；A is each
The maximum of described infrared transmitting tube 111 is just launching angle.
21, second limit, first edge of the touch area 2 of the bilateral touch screen of the optimum embodiment of the present embodiment
The length on edge 22 and 11, the second frame limit 12, the first frame limit of described touch frame 1 meets relationship below:
(L-l)/2=h × tan (a)；
In this manner it is ensured that infrared transmitting tube and infrared receiving tube by startup touch screen are positive and negative with maximum
When scanning angle is scanned, it is possible to crossing light is completely covered touch area, thus ensures Petting Area
There is in territory identical touch effect (with reference to Fig. 6～Fig. 7), thus be prevented effectively from " avris effect ".
Reference Fig. 4, in another embodiment, if the first edge of the described touch area 2 of bilateral touch screen
21, the length on the second edge 22 and 11, the second frame limit 12, the first frame limit of described touch frame 1 only meet with
Lower relational expression: (L-l)/2 ＜ h × tan (a), causes the infrared transmitting tube by starting touch screen and infrared receiver
Pipe is scanned with maximum positive and negative scanning angle, when the light intersected cannot be completely covered touch area, logical
Cross and use side infrared transmitting tube or side infrared receiving tube that the low-angle scanning of opposite side fluorescent tube is made up
Not up to require that the edge effect caused is long because touching mask limit and touch edge such that it is able to be prevented effectively from
" avris effect ".
Concrete, first infrared transmitting tube on described first frame limit 11 1111 is set (by the from left to right
One) angular dimension be that at least two scanning angle in b to a is scanned, and arrange described second
Last infrared receiving tube 1210 on frame limit 12 is (i.e. farthest away from described first infrared transmitting tube 1111
Angle sized by least two scanning angle in b to a be scanned；Or/and, described first frame is set
The angular dimension of last infrared transmitting tube 1110 on limit 11 is at least two scan angle in-b to-a
Degree is scanned, and the angle arranging first infrared receiving tube 1211 on described second frame limit 12 is-b
At least two scanning angle to-a is scanned；
Wherein, described angle b be equal to or less than and closest to the scan angle of angle arctan ((L-l)/2h)
Degree, a is that the maximum of each described infrared transmitting tube 111 is just launching angle or/and each described infrared receiving tube
The maximum positive receiving angle of 1211.Wherein, the quantity arranging scanning angle is set out according to actual, as long as can
Ensure scanning after intersect light can uniform fold in touch area 2.Wherein, the angle of b is preferably equal to
The scanning angle of arctan ((L-l)/2h), if the transmitting angle or red of described first infrared transmitting tube 1111
There is not arctan ((L-l)/2h) such a angle, the then angle of b in the receiving angle of external closed tube 1211
Degree should for less than and closest to one of arctan ((L-l)/2h) transmitting angle or receiving angle.
To sum up, bilateral infrared touch screen disclosed in the present embodiment will be by being respectively equipped with infrared transmitting tube and infrared
The length on two the frame limits receiving pipe is more than the length at two edges parallel with these two frame limits, touch area,
When being scanned hence with infrared transmitting tube and infrared receiving tube, light can be covered touch to greatest extent
Region, it is ensured that there is in touch area identical touch effect such that it is able to effectively reduce traditional bilateral red
" avris effect " and therefore the some blind areas that the avris infrared ray closeness of outer touch screen is low.
With reference to Fig. 5, the embodiment of the invention discloses a kind of infrared touch panel scan method, it is adaptable to such as Fig. 1 institute
Show that described bilateral infrared touch screen, described scan method include step S51～S54:
S51, when responding at least one touch objects touch control operation on the touchscreen, start the red of described touch screen
Emission pipe and infrared receiving tube are scanned with maximum positive and negative scanning angle, to obtain described touch screen
The light being blocked first between infrared transmitting tube and infrared receiving tube.
Refer to detect tactile it should be noted that respond at least one touch objects touch control operation on the touchscreen
Touching thing and touch the produced in a flash signal of described touch screen, these are that those skilled in the art can manage
Solve and determine.
Wherein, the purpose of this step be intended to the intersecting area of the Infrared so that scanning can uniformly and completely
Cover on touch area.
Wherein in an embodiment, if in the structure of bilateral infrared touch screen, the of described touch area 2
One the 21, second edge, edge 22 is full with the length on 11, the second frame limit 12, the first frame limit of described touch frame 1
Foot relationship below (with reference to Fig. 2):
(L-l)/2=h × tan (a)；
Wherein, L is the length on the 11, second frame limit 12, described first frame limit；L be described first edge 21,
The length at the second edge 22；H is the distance between described first frame limit 11 and the second frame limit 12；A is each
The maximum of described infrared transmitting tube 111 is just launching angle.
So, by starting the infrared transmitting tube of described touch screen and infrared receiving tube with the positive scanning angle of maximum,
I.e. a angle is scanned (with reference to Fig. 6), and with the positive scanning angle of maximum, i.e.-a angle is scanned (ginseng
Examine Fig. 7), then, the region intersected with the light of a ,-a angle scanning can just and be completely covered tactile
Control region 2, thus there is in ensureing touch area identical touch effect, promote the touch screen inspection to touch point
Survey effect.
In another embodiment, if in the structure of bilateral infrared touch screen, the first limit of described touch area 2
Edge the 21, second edge 22 only meets with the length on 11, the second frame limit 12, the first frame limit of described touch frame 1
Relationship below (with reference to Fig. 2):
(L-l)/2 ＜ h × tan (a)；
The infrared transmitting tube by startup touch screen and infrared receiving tube will be caused with maximum positive and negative scanning angle
Being scanned, the light intersected cannot be completely covered touch area (as shown in Figure 4).
So, in this step, concrete execution operates as follows:
The infrared transmitting tube and the infrared receiving tube that start described touch screen are scanned with the positive scanning angle of maximum,
The angular dimension simultaneously arranging first infrared transmitting tube on described first frame limit is at least two in b to a
Individual scanning angle is scanned, and the angle arranging last infrared receiving tube on described second frame limit is
At least two scanning angle in size b to a is scanned；And
The infrared transmitting tube and the infrared receiving tube that start described touch screen are born scanning angle with maximum and are scanned,
Arrange simultaneously the angular dimension of last infrared transmitting tube on described first frame limit be in-b to-a at least
Two scanning angles are scanned, and the angle arranging first infrared receiving tube on described second frame limit is-b
At least two scanning angle to-a is scanned；
Wherein, described angle b be equal to or less than and closest to the scan angle of angle arctan ((L-l)/2h)
Degree.A is that the maximum of each described infrared transmitting tube 111 is just launching angle or/and each described infrared receiving tube
The maximum positive receiving angle of 1211.Wherein, the quantity arranging scanning angle is set out according to actual, as long as can
Ensure scanning after intersect light can uniform fold in touch area 2.Wherein, the angle of b is preferably equal to
The scanning angle of arctan ((L-l)/2h), if the transmitting angle or red of described first infrared transmitting tube 1111
There is not arctan ((L-l)/2h) such a angle, the then angle of b in the receiving angle of external closed tube 1211
Degree should for less than and closest to one of arctan ((L-l)/2h) transmitting angle or receiving angle.
In this embodiment, by using side infrared transmitting tube or side infrared receiving tube to cowl lamp
The low-angle scanning of pipe makes up because touching mask limit and touching the edge effect mistake that edge not up to requires to cause
Long such that it is able to be prevented effectively from " avris effect ".
With reference to Fig. 8, it is assumed that response touch objects touch point on the touchscreen touch point A as shown in Figure 8 and
Touch point B, then after the infrared scan of step S51, the infrared transmitting tube of the described touch screen obtained
With the light being blocked first between infrared receiving tube is as shown in Figure 8.
S52, the public territory obtained by the described ray intersection being blocked first are as candidate touch point.
With reference to Fig. 9, when, after the light being blocked first that step S51 obtains as shown in Figure 8, at once obtaining
To the public territory 31,32,33 and 34 of the described ray intersection being blocked first, by these public territorys
31,32,33 and 34 as candidate touch point, owing to both having contained true touch point in candidate touch point, also
Suspicious points (pseudo-point) may be comprised, it is therefore desirable to these candidate touch points are analyzed further and judges to determine very
Real touch point, concrete execution step S53 and S54.
S53, the infrared transmitting tube starting described touch screen and infrared receiving tube are with arbitrarily at least one non-maximum
Positive and negative scanning angle is scanned, to obtain between infrared transmitting tube and the infrared receiving tube of described touch screen
The light that is blocked of secondary.S54, by the quantity of light that is blocked through described secondary more than or equal to threshold
The candidate touch point of value is defined as true touch point.
In step S53～S54, mainly by candidate touch point obtained above is carried out other directions
Scanning, to obtain the light that the secondary between the infrared transmitting tube of touch screen and infrared receiving tube is blocked, and
The light being blocked in conjunction with secondary and candidate touch point are to judge the position at true touch point place.
Such as, as shown in Figure 10, the present embodiment uses and just sweeps (i.e. 0 scanning angle) and judge.Concrete,
It is scanned with 0 scanning angle by the infrared transmitting tube and infrared receiving tube starting touch screen.It is appreciated that
, it is not necessary to start all of infrared transmitting tube and infrared receiving tube on touch screen, as long as starting the most infrared
Transmitting tube and infrared receiving tube make Infrared can be completely covered place, described candidate touch point region or
Person touch area 2.
After just scanning, it is possible to obtain the secondary quilt between the infrared transmitting tube of touch screen and infrared receiving tube
The light blocked, as shown in figure 11.As can be seen from Figure 11, the light that secondary is blocked process candidate touch
Touching is some candidate touch point 32 and 34, therefore, it is possible to judge that candidate touch point 32 and 34 is true touch point,
And candidate touch point 31 and 33 is pseudo-point.
In this step, described threshold value is directly proportional to the quantity starting the described positive and negative scanning angle of non-maximum.
It addition, for the judgement precision improving true touch point, it would however also be possible to employ privately owned light number judges.
True touch point will be judged to by privately owned light number more than or equal to each described candidate touch point of certain threshold value
Region；Wherein, the privately owned light number of each described candidate touch point is the quilt only passing through this candidate touch point
The quantity of the light blocked.
To sum up, the infrared touch panel scan method of the present embodiment is applicable to bilateral infrared touch screen, wherein, and should
The length on two frame limits of infrared transmitting tube and infrared receiving tube it is respectively equipped with more than touching on bilateral infrared touch screen
Touching the length at two edges parallel with these two frame limits, region, the scan method of the present invention is touched by startup
When the infrared transmitting tube of screen and infrared receiving tube are scanned with maximum positive and negative scanning angle, can will intersect
Light cover touch area to greatest extent, in keeping touch area, there is identical touch effect, it is thus possible to
" avris effect " that enough avris infrared ray closenesses effectively reducing traditional bilateral infrared touch screen are low and therefore have
Blind area.
Above disclosed only one preferred embodiment of the present invention, can not limit this with this certainly
Bright interest field, one of ordinary skill in the art will appreciate that all or part of stream realizing above-described embodiment
Journey, and according to the equivalent variations that the claims in the present invention are made, still fall within the scope that the present invention is contained.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method,
Can be by computer program and complete to instruct relevant hardware, described program can be stored in a calculating
In machine read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.
Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory,
Or random store-memory body (Random Access Memory, RAM) etc. ROM).
Claims (10)
1. a bilateral infrared touch screen, it is characterised in that including: infrared touch frame and touch area；Institute
State the most uniformly be covered with on two the first relative frame limits of infrared touch frame and the second frame limit infrared transmitting tube and
Infrared receiving tube, described infrared transmitting tube is oppositely arranged one by one with described infrared receiving tube；
Described touch area includes first edge parallel with described first frame limit, the second frame limit and the second edge,
The length at described first edge and the second edge is less than the first frame limit and the length on the second frame limit.
2. bilateral infrared touch screen as claimed in claim 1, it is characterised in that described touch area is positioned at
Central authorities in described infrared touch frame area defined.
3. bilateral infrared touch screen as claimed in claim 2, it is characterised in that each described infrared emission
The maximum of pipe is just being launched angle and is being born the maximum positive acceptance angle launching angle with each described infrared receiving tube with maximum
Degree bears the equal in magnitude of receiving angle with maximum.
4. the bilateral infrared touch screen as described in any one of claims 1 to 3, it is characterised in that described red
Outer touch frame is rectangle frame, described first frame limit and the long limit that the second frame limit is described infrared touch frame.
5. bilateral infrared touch screen as claimed in claim 3, it is characterised in that described first edge, the
Two edges and described first frame limit, the length on the second frame limit meet relational expression: (L-l)/2≤h × tan (a)；Its
In, L is described first frame limit, the length on the second frame limit；L is described first edge, the length at the second edge；
H is the distance between described first frame limit and the second frame limit；A is that the maximum of each described infrared transmitting tube is just sent out
Firing angle degree.
6. bilateral infrared touch screen as claimed in claim 5, it is characterised in that as (L-l)/2 < h × tan
Time (a), arrange the angular dimension of first infrared transmitting tube on described first frame limit be in b to a extremely
Few two scanning angles are scanned, and arrange the angle of last infrared receiving tube on described second frame limit
Sized by degree, at least two scanning angle in b to a is scanned；Or/and, arrange on described first frame limit
The angular dimension of last infrared transmitting tube is that at least two scanning angle in-b to-a is scanned, and
The angle arranging first infrared receiving tube on described second frame limit is at least two scan angle in-b to-a
Degree is scanned；Wherein, described angle b for equal to or less than and closest to angle arctan ((L-l)/2h)
Scanning angle.
7. an infrared touch panel scan method, it is adaptable to bilateral red as described in any one of Claims 1 to 5
Outer touch screen, it is characterised in that described scan method includes step:
When responding at least one touch objects touch control operation on the touchscreen, start infrared of described touch screen
Penetrate pipe and infrared receiving tube is scanned with maximum positive and negative scanning angle, to obtain the infrared of described touch screen
The light being blocked first between transmitting tube and infrared receiving tube；
The public territory obtained by the described ray intersection being blocked first is as candidate touch point；
The infrared transmitting tube and the infrared receiving tube that start described touch screen are positive and negative with arbitrarily at least one non-maximum
Scanning angle is scanned, to obtain the secondary between infrared transmitting tube and the infrared receiving tube of described touch screen
The light being blocked；
The quantity of the light being blocked through described secondary is defined as more than or equal to the candidate touch point of threshold value
True touch point.
8. bilateral infrared touch screen scan method as claimed in claim 7, it is characterised in that described startup
The infrared transmitting tube of described touch screen and infrared receiving tube are with arbitrarily at least one positive and negative scanning angle of non-maximum
It is scanned, particularly as follows:
The infrared transmitting tube and the infrared receiving tube that start described touch screen are scanned with 0 degree of scanning angle.
9. bilateral infrared touch screen scan method as claimed in claim 7, it is characterised in that described threshold value
It is directly proportional to the quantity starting the described positive and negative scanning angle of non-maximum.
10. bilateral infrared touch screen scan method as claimed in claim 7, it is characterised in that as (L-l)
/ 2 < during h × tan (a), wherein, L is described first frame limit, the length on the second frame limit；L is described first limit
Edge, the length at the second edge；H is the distance between described first frame limit and the second frame limit；A is each described
The maximum of infrared transmitting tube is just launching angle；
Infrared transmitting tube and the infrared receiving tube of the described touch screen of described startup enter with maximum positive and negative scanning angle
Row scanning particularly as follows:
The infrared transmitting tube and the infrared receiving tube that start described touch screen are scanned with the positive scanning angle of maximum,
The angular dimension simultaneously arranging first infrared transmitting tube on described first frame limit is at least two in b to a
Individual scanning angle is scanned, and the angle arranging last infrared receiving tube on described second frame limit is
At least two scanning angle in size b to a is scanned；
The infrared transmitting tube and the infrared receiving tube that start described touch screen are born scanning angle with maximum and are scanned,
Arrange simultaneously the angular dimension of last infrared transmitting tube on described first frame limit be in-b to-a at least
Two scanning angles are scanned, and the angle arranging first infrared receiving tube on described second frame limit is-b
At least two scanning angle to-a is scanned；
Wherein, described angle b be equal to or less than and closest to the scan angle of angle arctan ((L-l)/2h)
Degree.
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| CN201610248845.1A CN106020565A (en) | 2016-04-20 | 2016-04-20 | Double-side infrared touch screen and infrared touch screen scanning method |
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| CN201610248845.1A CN106020565A (en) | 2016-04-20 | 2016-04-20 | Double-side infrared touch screen and infrared touch screen scanning method |
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| CN116855218A (en) * | 2023-07-10 | 2023-10-10 | 上海森克电子科技有限公司 | Zero bonding process for capacitive screen and liquid crystal film group |
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Application publication date: 20161012 |