CN103019460A - Bilateral combined touch screen - Google Patents
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- CN103019460A CN103019460A CN2011103005126A CN201110300512A CN103019460A CN 103019460 A CN103019460 A CN 103019460A CN 2011103005126 A CN2011103005126 A CN 2011103005126A CN 201110300512 A CN201110300512 A CN 201110300512A CN 103019460 A CN103019460 A CN 103019460A
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Abstract
The invention discloses a bilateral combined touch screen, which relates to the field of infrared touch screens. The bilateral combined touch screen comprises at least two touch signal sensing systems, wherein a group of infrared emitting arrays is arranged one edge of a touch area; a group of infrared receiving arrays is arranged on the other edge of the touch area; the infrared emitting arrays and the infrared receiving arrays are arranged oppositely; each infrared emitting array comprises at least at two infrared emitting tubes; one infrared emitting tube corresponds to an infrared receiving tube group consisting of at least three infrared receiving tubes; infrared receiving tubes in at least two infrared receiving tube groups are overlapped on the aspect of arrangement positions; straight lines where light rays emitted from at least two infrared emitting tubes onto the infrared receiving tubes in each corresponding infrared receiving tube group are positioned intersect with one another, and determined intersection points exist; and when a touch piece shields light rays which correspond to at least two straight lines having intersection points, a touch point exists on at least one intersection point. Due to the adoption of the design, the position of a touch point on the touch area can be determined by using only one group of infrared emitting arrays and one group of infrared receiving arrays.
Description
Technical field
The present invention relates to the touch-screen field, relate in particular to the infrared touch panel field.
Background technology
Existing infrared touch panel, General Requirements with infrared receiving array and infrared emission array arrangement at square display screen peripheral.Therefore supporting display screen shape and size are all limited to some extent.
Along with the development of technology, people propose more requirements to the shape and size of display screen, and existing infrared touch panel can not well adapt to the development of display screen.
Summary of the invention
The object of the present invention is to provide a kind of bilateral combined type to touch screen, to solve the problems of the technologies described above.
Technical matters solved by the invention can realize by the following technical solutions:
Bilateral combined type touches screen, comprises the touch signal induction system, and described touch signal induction system comprises the infrared emission array, and the infrared receiving array that is oppositely arranged with described infrared emission array; Also comprise the touch sensible accessory circuit, described touch sensible accessory circuit connects described touch signal induction system, it is characterized in that: comprise at least two described touch signal induction systems; At least two described touch signal induction systems connect described touch sensible accessory circuit;
At least one described touch signal induction system only is provided with one group of infrared emission array and one group of infrared receiving array;
A limit of described touch area is provided with one group of described infrared emission array, another of described touch area limit is provided with one group of described infrared receiving array, described infrared emission array and described infrared receiving array are oppositely arranged, and described infrared receiving array receives the infrared light of described infrared emission array emission;
In the one described touch signal induction system:
Comprise at least two infrared transmitting tubes in the described infrared emission array, the infrared light of one described infrared transmitting tube emission is received (and identification) by at least three infrared receiving tubes in the described infrared receiving array, i.e. the infrared receiving tube group of at least three infrared receiving tubes compositions of a described infrared transmitting tube correspondence;
Infrared receiving tube at least two described infrared transmitting tubes in corresponding at least two infrared receiving tube groups exists overlapping at arrangement position; Because the infrared receiving tube at least two infrared receiving tube groups exists overlapping at arrangement position, so the light place straight line of at least two infrared transmitting tubes infrared receiving tube in corresponding each infrared receiving tube group exists staggered, and the definite cross-point of existence, the position of described cross-point is obtained by a microprocessor system, and described microprocessor system connects described touch sensible accessory circuit;
Be positioned at least two described straight lines at the touch part, and wherein have at least two straight lines to have at least one cross-point; Namely, when touching part and sheltering from least two the corresponding light of described straight line that has a cross-point, then described microprocessor system is judged as the formed touch point of described touch part and covers at least one described cross-point, namely has at least a described cross-point place that the touch point is arranged.
At least two described touch signal induction systems only are provided with respectively one group of described infrared emission array and one group of described infrared receiving array, namely comprise the described infrared emission array of at least two groups and two groups of described infrared receiving arraies.
Technique scheme is according to the optical principle of light rectilinear propagation, and two straight lines intersect the geometrical principle of determining an intersection point, determine the position of cross-point on touch-screen by the microprocessor system, then by determining to touch the light path of light that part blocks, and then the microprocessor system determines light path of light corresponding one or several cross-points that the touch part blocks, again by one or several cross-points, accurately or the position of Fuzzy Determination touch point.
By above-mentioned design, as long as one group of infrared emission array, one group of described infrared receiving array can be determined the position of touch point on the touch area.Determine the traditional infrared touch-screen of position, touch point to have the characteristics such as structure is simplified greatly, cost reduces greatly with respect to original by two groups of infrared emission arrays, two groups of described infrared receiving arraies.
In addition, the traditional infrared touch-screen is applied to width greater than the display screen of 2m because left and right sides correlation optical signal transmission distance problem can not be applied to the wide display screen of width such as being not suitable for.Among the present invention, bilateral formula infrared touch panel does not need left and right sides correlation light signal to finish the work, and therefore not affected by the display screen width, can be applied on the display screen of width greater than 2m.With respect to the traditional infrared touch-screen, the dirigibility of arranging strengthens greatly, has obvious technical advantage.
And can be applicable to the wider screen of width by a plurality of described touch signal induction systems splicings, even to be applicable to width be tens meters screen.Connecting method can be versatile and flexible, is applicable to the screen of different geometries.
Infrared receiving tube at least two described infrared transmitting tubes in corresponding at least two infrared receiving tube groups exists overlapping at arrangement position, the infrared receiving tube at overlapping place is shared by described two infrared receiving tube groups.With simplified structure, and reduce cost.
Arrange successively and be parallel to each other about the described infrared emission array of at least two groups, arrange successively and be parallel to each other about the described infrared receiving array of at least two groups.
The run-in index structure tends to exist the dead band between the described touch signal induction system of at least two groups, and in order to reduce the touch blind area between the described touch signal induction system of two adjacent groups, the present invention can adopt following design:
The described infrared emission array of at least two groups front and back are overlapping arranges and is parallel to each other, and the described infrared receiving array of at least two groups front and back are overlapping arranges and be parallel to each other;
One group of described infrared emission array and the described infrared emission array of adjacent sets are positioned on the Different Plane, and one group of described infrared receiving array and the described infrared receiving array of adjacent sets are positioned on the Different Plane.
Arrange along same straight line successively about the described infrared emission array of at least two groups, arrange along same straight line successively about the described infrared receiving array of at least two groups.
The design that above-mentioned employing orthoscopic is arranged tends to exist the dead band between adjacent two touch signal induction systems, and in order to reduce the touch blind area between the described touch signal induction system of two adjacent groups, the present invention can adopt following design:
The infrared light of the infrared transmitting tube emission adjacent with the described infrared emission array of adjacent sets is received (identification) by at least one infrared receiving tube in the described infrared receiving array of adjacent sets in one group of described infrared emission array;
Described microprocessor system is when determining cross-point, and control touch sensible accessory circuit is lighted infrared transmitting tube from one group of described infrared emission array to the described infrared emission array of adjacent sets respectively one by one;
In the corresponding infrared receiving tube group of infrared transmitting tube adjacent with the described infrared emission array of adjacent sets, have at least one to be the infrared receiving tube in the described infrared receiving array of adjacent sets.
Distance in one group of described infrared emission array between adjacent two infrared transmitting tubes is not less than the width of described infrared transmitting tube;
Limit section has at least an infrared transmitting tube to be arranged between adjacent two infrared transmitting tubes in the described infrared emission array of adjacent sets in one group of described infrared emission array, and the limit section of the limit section of one group of described infrared emission array and the described infrared emission array of adjacent sets forms the serrate occlusion structure;
Distance in one group of described infrared receiving array between adjacent two infrared receiving tubes is not less than the width of described infrared receiving tube;
Infrared receiving tube and described infrared transmitting tube in the described infrared receiving array are oppositely arranged, and the limit section of one group of described infrared receiving array and the limit section of the described infrared receiving array of adjacent sets form the serrate occlusion structure.
Infrared transmitting tube between adjacent two infrared transmitting tubes in one group of described infrared emission array can be located along the same line with adjacent two infrared transmitting tubes and to arrange, and also can be positioned on the different straight lines and arrange.
The arranging density of the infrared reception LED limit section of the described infrared receiving array of described touch signal induction system is greater than the arranging density at middle part.To guarantee that limit section has good scanning accuracy.
The arranging density of the infrared emission LED limit section of the described infrared emission array of described touch signal induction system is greater than the arranging density at middle part.To guarantee that limit section has good scanning accuracy.
Described infrared emission array in the two described touch signal induction systems is positioned at the screen homonymy, two described touch signal induction system adjacent dislocation sweep time.To avoid mutual signal to disturb.
The described infrared emission array of one described touch signal induction system, adjacent with the described infrared receiving array of another described touch signal induction system, about arrange successively and be parallel to each other.Signal disturbs between two described touch signal induction systems to avoid.
The described infrared emission array of one described touch signal induction system, adjacent with the described infrared receiving array of another described touch signal induction system, about arrange along same straight line successively.
Infrared emission LED in the described infrared emission array adopts the infrared emission LED of flat.
Infrared reception LED in the described infrared receiving array adopts the infrared reception LED of flat.
Also comprise transparent touch pad and a touch pad framework, described touch pad is embedded in the described touch pad framework; Described touch pad below is provided with at least one described infrared emission array on one side, and relative at least another side is provided with described infrared receiving array;
The transmitting terminal of the described infrared transmitting tube in the described infrared emission array is towards described touch pad top; The corresponding reflective device of emission that described infrared transmitting tube emitted light is played reflex that is provided with in described touch pad top;
The receiving end of the described infrared receiving tube in the described infrared receiving array is towards described touch pad top; Corresponding being provided with in described touch pad top receives the reflective device of reception that light plays reflex to described infrared receiving tube;
The light reflection direction of the reflective device of described emission is towards the light receive direction of the reflective device of described reception.
Realize following light path by above-mentioned design, arrive after the light that the infrared emission array is launched reflects through the reflective device of emission and receive reflective device, and after receiving reflective device reflection, arrive infrared receiving array, and by infrared receiving array perception.Thereby realize the perception to the touch point on touch pad.
Described touch pad is embedded in the described touch pad framework, carries out easily the waterproof setting between touch pad and the touch pad framework, and next the present invention of prerequisite of waterproof can realize waterproof between touch pad and touch pad framework.
Scribble the waterproof sealing glue-line between described touch pad and the described touch pad framework, tight to guarantee sealing, dustproof and waterproof.
The reflective device of described emission adopts triangular prism, and the reflective device of described reception also adopts triangular prism, and the vertical edge of two described triangular prisms is oppositely arranged.Vertical edge is exposed to the outside, is not easy to deposit dust, and appearance looks elegant.
The square reflecting prism that the reflective device of described emission adopts tangent plane to be square, the reflective device of described reception also adopts square reflecting prism; Be provided with a reflecting surface in the described square reflecting prism, described reflecting surface is respectively an incidence surface, an exiting surface towards two sides of square reflecting prism; The incidence surface of the described exiting surface of the reflective device of described emission and the reflective device of described reception is oppositely arranged.
In the specific design for a described touch signal induction system:
Described microprocessor system determines that the mode of cross-point can be:
One, obtain following data:
When (1) determining that each described infrared transmitting tube is lighted respectively, at least three described infrared receiving tubes of response are divided to a described infrared receiving tube group with at least three described infrared receiving tubes, by described microprocessor system log (SYSLOG) respectively;
(2) determine relative distance between described infrared emission array and described infrared receiving array, by described microprocessor system log (SYSLOG);
(3) determine the relative position of described infrared transmitting tube in described infrared emission array, and the relative position of described infrared receiving tube in described infrared receiving array, by described microprocessor system log (SYSLOG);
Two, calculate the cross-point location method:
(1) according to the relative position of described infrared transmitting tube in described infrared emission array, and relative distance between described infrared emission array and described infrared receiving array, determine position and the angle of each the bar light place straight line between each infrared receiving tube in described infrared transmitting tube and the corresponding described infrared receiving tube group, and be designated as a straight line group information;
(2) determine to exist at least two staggered group infrared receiving tube groups, and definite at least two corresponding two groups of straight line group information of infrared receiving tube, according to position and the angle of two groups of straight line group information cathetuss, determine crossing straight line, and determine the cross-point relative position.
The method of determining cross-point in (2) can be to utilize by two intersecting straight lines, two infrared receiving tubes, two triangles that infrared receiving tube consists of, and uses the triangulation calculation rule to calculate the cross-point relative position.
The relative distance of mentioning in the above-mentioned design, relative position refer to the distance relative with the touch area and position, can be concrete sizes, also can be the proportionate relationships between each geometric data.Can obtain on the basis that described microprocessor system only carries out relative simple computation the position of cross-point by above-mentioned design, for the position of further determining the touch point lays the foundation.
Higher in touch-screen resolution, cross-point is comparatively intensive, and when the touch point is larger, can cover on many straight lines that interlock in twos, namely there is the staggered light of two bundles at least two the cross-point all to be blocked, form at least two when being blocked cross-point, described microprocessor system determines the position, touch point in the following way:
Judge the position of each cross-point that is blocked, relatively each distance between cross-point and described infrared emission array that is blocked is got the nearest cross-point that is blocked of the described infrared emission array of distance and is the cross-point that effectively is blocked, as the position, touch point.
When existing at least two to be blocked cross-point with nearest described of described infrared emission array, the microprocessor system is considered as the middle part that the touch point is positioned at least two described cross-points that are blocked.
By above-mentioned design, can effectively solve higher in touch-screen resolution, cross-point is comparatively intensive and the touch point exists when being blocked in a large number cross-point when larger, is not easy to judge the problem of position, touch point.
The generation of cross-point information can be in the following ways:
(1) before carrying out touch point identification work, first-selection is obtained the cross-point relative position, and the relative position of each cross-point corresponded in the described touch area, and be stored into described microprocessor system and form database, there is the touch point, form when being blocked cross-point, the microprocessor system determines the cross-point that is blocked, and transfer database information, obtain the position corresponding with the described cross-point that is blocked in described touch area, thereby determine the position, touch point.
This design can reduce the calculated amount of microprocessor system in the touch operation.
(2) when carrying out touch operation, there is the cross-point that is blocked determining, then determine the position, touch point by described calculating cross-point location method.
This design can reduce the memory data output in the microprocessor system.
For the method for determining cross-point is simplified, can be in the following ways:
In the hardware, infrared receiving tube in described infrared transmitting tube and the corresponding described infrared receiving tube group is the correlation relation, described microprocessor system controls described infrared emission array and infrared receiving array by described touch sensible accessory circuit, and the touch point in the described touch area is scanned;
Scanning in the situation of touch point, described microprocessor system determines the position of at least one described cross-point that the touch point covers by moving the axle scanning algorithm, thereby obtains the positional information of touch point in the touch area;
The described axle scanning algorithm of moving refers to, at first determines the scattering angle φ of described infrared transmitting tube emission efficient light signal;
Described scattering angle φ refers to that take described infrared transmitting tube as the summit a described infrared receiving tube of arranging the two ends of described infrared receiving tube that certainly responds infrared signal draws straight line to described infrared transmitting tube respectively, formed angle.The two ends of the described infrared receiving tube of one row of response infrared signal also are the two ends of corresponding described infrared receiving tube group.
Because described infrared transmitting tube and two described infrared receiving tube relative positions determine that respectively therefore described scattering angle φ is determined;
The infrared receiving tube that described microprocessor system controls in the described infrared receiving array is opened, and the infrared transmitting tube of controlling in the described infrared emission array is lighted one by one, described infrared emission array and described infrared receiving array to the touch point scanning process in, with rectangular coordinate system as a reference, take the length direction of infrared emission array as X-direction, take the direction vertical with X-direction as Y direction;
Wherein scan on the X coordinate axis in the correlation scanning, when determining the infrared receiving tube that is the correlation relation with infrared transmitting tube C1 and being blocked, obtain the X coordinate figure X1 of infrared transmitting tube C1;
Wherein on the X coordinate axis during sequential scanning, the X coordinate figure X3 of the infrared transmitting tube C3 when scanning first and occurring blocking;
Take the Y coordinate axis coordinate of infrared emission array as Y0, then:
By aforesaid equation, determine coordinate figure Y1, then the coordinate of touch point is X1, Y1.
The above-mentioned coordinate relation that embodies in the axle scanning algorithm of moving focuses on embodying the position relationship between touch point, infrared transmitting tube, the infrared receiving tube, concerns little with choosing of coordinate system itself.The choosing of true origin, X coordinate axis, the Y coordinate axis can be relatively flexible.By determining the described infrared receiving tube position at two ends, can simplify calculating.
Can determine in the following way the described infrared receiving tube of described infrared receiving tube group:
Described microprocessor system does not have in the touch area in the situation of touch point, open by the infrared receiving tube that described touch sensible accessory circuit is controlled in the described infrared receiving array, and the infrared transmitting tube of controlling in the described infrared emission array is lighted one by one;
When an infrared transmitting tube is lighted, the power valve coordinate figure of this infrared transmitting tube under the described microprocessor system log (SYSLOG), and record at least two receiving tube coordinate figures of the infrared receiving tube at the two ends that receive the infrared signal of sending, and power valve coordinate figure and corresponding at least two receiving tube coordinate figures are carried out related, and incidence relation stored; Infrared transmitting tube is lighted one by one, finally forms the database of an infrared transmitting tube and corresponding infrared receiving tube group incidence relation.
When the intensity that receives the signal that described infrared transmitting tube launches at described infrared receiving tube is enough identified, be considered as receiving the signal that infrared transmitting tube sends.Also can set a signal voltage intensity reference value for described infrared receiving tube, when the signal of launching at described infrared transmitting tube makes magnitude of a voltage fluctuation that described infrared receiving tube produces greater than described signal voltage intensity reference value, be considered as receiving the signal that infrared transmitting tube sends.Described signal voltage intensity reference value can be set to 0.2 volt～2.5 volts.By setting described signal voltage intensity reference value, be conducive to control flexibly scattering angle φ, so that adjust accuracy of identification.
Can also determine in the following way the described infrared receiving tube of described infrared receiving tube group:
Determine the coordinate of an infrared transmitting tube, then centered by described coordinate, symmetrical at least two described infrared receiving tubes of appointment are as the described infrared receiving tube of described infrared receiving tube group.Specified infrared receiving tube should you can be stable the signal of response infrared transmitting tube.
Can determine in the following way the described infrared receiving tube position at the two ends of described infrared receiving tube group:
When determining that infrared transmitting tube is lighted described in the described infrared emission array, the described infrared receiving tube at the two ends of the described infrared receiving tube of one row of response infrared signal, and the corresponding relation of the described infrared receiving tube at the two ends that infrared transmitting tube described in the described infrared emission array is corresponding forms a database.
Can also determine in the following way the described infrared receiving tube position at the two ends of described infrared receiving tube group:
Determine the coordinate of an infrared transmitting tube, then centered by described coordinate, symmetrical two described infrared receiving tubes of appointment are as the described infrared receiving tube at two ends.The described infrared receiving tube distance at each corresponding two ends of described infrared transmitting tube should be close.
Described scattering angle φ is in the described database creation process, the coordinate of infrared transmitting tube, respectively and receive the angle value that the line between two coordinates of infrared receiving tube at two ends of the infrared signal of sending consists of; In described database creation process, according to the power valve coordinate figure of infrared transmitting tube, two the receiving tube coordinate figures of infrared receiving tube that receive the two ends of the infrared signal of sending calculate described scattering angle φ by the microprocessor system.Described scattering angle φ and non-artificial setting, but calculated voluntarily by the structural parameters of equipment itself, precision can be improved.
Described infrared transmitting tube is for adopting the wide-angle infrared transmitting tube.
The signal of each infrared transmitting tube emission in the described infrared emission array is by three infrared receiving tubes identifications in the described infrared receiving array, the vertical line of dividing equally between two other described infrared receiving tube of line between the infrared receiving tube in described infrared transmitting tube and three the described infrared receiving tubes.
Larger when the touch area, when the present invention was the large scale infrared touch panel, described infrared emission array and described infrared receiving array were arranged on two long limits, touch area, and are oppositely arranged.Guarantee that large-sized the present invention all can accurately touch in the touch area, in order to guarantee its precision.
Less when the touch area, when the present invention was the small size infrared touch panel, described infrared emission array and described infrared receiving array were arranged on two minor faces in touch area, and are oppositely arranged.When guaranteeing that the touch area can touch, reduce the quantity of infrared transmitting tube and infrared receiving tube, so that Cost reduction.
The acquiescence radius of touch point can be 5mm, the both sides that namely the are defaulted as described touch point respectively distance between two infrared transmitting tubes that the Y coordinate axis is blocked are 5mm, the both sides of the described touch point respectively distance between two infrared transmitting tubes that the X coordinate axis is blocked are 5mm, by the acquiescence radius touch point position judgment are revised.None-identified goes out true touch point in the microprocessor system, and it is real perhaps to identify a large amount of true touch points, calls described acquiescence radius.The acquiescence radius is set, and excessive, the complex calculation of recognizing site deviation appears in the equipment that can prevent, even the problem such as deadlock.
Description of drawings
Fig. 1 is a kind of structure of the present invention and the cross-point synoptic diagram of arranging;
Fig. 2 is a kind of arrangement synoptic diagram of infrared emission array of the present invention and infrared receiving array;
Fig. 3 is that the another kind of infrared emission array of the present invention and infrared receiving array is arranged synoptic diagram;
Fig. 4 is overlapping synoptic diagram of arranging before and after infrared emission array of the present invention and the infrared receiving array;
Fig. 5 is the synoptic diagram of infrared emission array of the present invention and the interlock of infrared receiving array serrate;
Fig. 6 is for moving axle scanning algorithm principle schematic.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, further set forth the present invention below in conjunction with concrete diagram.
With reference to Fig. 1, bilateral combined type touches screen, comprises the touch signal induction system, and the touch signal induction system comprises infrared emission array 1, and the infrared receiving array 2 that is oppositely arranged with infrared emission array 1.Also comprise the touch sensible accessory circuit, the touch sensible accessory circuit connects the touch signal induction system, and the touch signal induction system comprises at least two, and at least two touch signal induction systems connect the touch sensible accessory circuit.At least one touch signal induction system only is provided with one group of infrared emission array 1 and one group infrared receiving array 2.A limit of touch area 4 is provided with one group of infrared emission array 1, another limit of touch area 4 is provided with one group infrared receiving array 2, infrared emission array 1 is oppositely arranged with infrared receiving array 2, and infrared receiving array 2 receives the infrared light of infrared emission array 1 emission.
In the one touch signal induction system: comprise at least two infrared transmitting tubes 12 in the infrared emission array 1, the infrared light of one infrared transmitting tube, 12 emissions is received (and identification) by at least three infrared receiving tubes 13 in the infrared receiving array 2, i.e. the infrared receiving tube group of at least three infrared receiving tubes of infrared transmitting tube 12 correspondences 13 compositions.Infrared receiving tube 13 at least two infrared transmitting tubes 12 in corresponding at least two infrared receiving tube groups exists overlapping at arrangement position.Because the infrared receiving tube 13 at least two infrared receiving tube groups exists overlapping at arrangement position, so the light place straight line of at least two infrared transmitting tubes 12 infrared receiving tube 13 in corresponding each infrared receiving tube group exists staggered, and the definite cross-point 14 of existence, the position of cross-point 14 is obtained by the microprocessor system, the microprocessor system connects the touch sensible accessory circuit, be positioned at least two straight lines at the touch part, and wherein have at least two straight lines to have at least one cross-point 14.That is, when touching part and sheltering from least two the corresponding light of straight line that has a cross-point 14, then the microprocessor system is judged as and touches the formed touch point of part and cover at least one cross-point 14, namely has at least a cross-point 14 places that the touch point is arranged.
At least two touch signal induction systems only are provided with respectively one group of infrared emission array 1 and one group infrared receiving array 2, namely comprise at least two group infrared emission arrays 1 and two groups infrared receiving arraies 2.
Technique scheme is according to the optical principle of light rectilinear propagation, and two straight lines intersect the geometrical principle of determining an intersection point, determine the position of cross-point 14 on touch-screen by the microprocessor system, then by determining to touch the light path of light that part blocks, and then the microprocessor system determines light path of light corresponding one or several cross-points 14 that the touch part blocks, again by one or several cross-points 14, accurately or the position of Fuzzy Determination touch point.
By above-mentioned design, as long as one group of infrared emission array 1, one group infrared receiving array 2 can be determined the position of touch point on touch area 4.With respect to original traditional infrared touch-screen that passes through two groups of infrared emission arrays 1, two groups infrared receiving arraies 2 definite positions, touch point, have the characteristics such as structure is simplified greatly, cost reduces greatly.
In addition, the traditional infrared touch-screen is applied to width greater than the display screen of 2m because left and right sides correlation optical signal transmission distance problem can not be applied to the wide display screen of width such as being not suitable for.Among the present invention, bilateral formula infrared touch panel does not need left and right sides correlation light signal to finish the work, and therefore not affected by the display screen width, can be applied on the display screen of width greater than 2m.With respect to the traditional infrared touch-screen, the dirigibility of arranging strengthens greatly, has obvious technical advantage.And can be applicable to the wider screen of width by the splicing of a plurality of touch signal induction systems, even to be applicable to width be tens meters screen.Connecting method can be versatile and flexible, is applicable to the screen of different geometries.
Infrared receiving tube 13 at least two infrared transmitting tubes 12 in corresponding at least two infrared receiving tube groups exists overlapping at arrangement position, the infrared receiving tube 13 at overlapping place is shared by two infrared receiving tube groups.With simplified structure, and reduce cost.With reference to Fig. 2, at least two group infrared emission arrays about 1 are arranged along same straight line successively, and the infrared receiving array about 2 of at least two groups is arranged along same straight line successively.The design that above-mentioned employing orthoscopic is arranged tends to exist the dead band between adjacent two touch signal induction systems, and in order to reduce the touch blind area between the two adjacent groups touch signal induction system, the present invention can adopt following design:
The infrared light of infrared transmitting tube 12 emissions adjacent with adjacent sets infrared emission array 1 is received (identification) by at least one infrared receiving tube 13 in the infrared receiving array 2 of adjacent sets in one group of infrared emission array 1.The microprocessor system is when determining cross-point, and control touch sensible accessory circuit is lighted infrared transmitting tube 12 from one group of infrared emission array 1 to adjacent sets infrared emission array 1 respectively one by one.In the infrared transmitting tube 12 corresponding infrared receiving tube groups adjacent with adjacent sets infrared emission array 1, have at least one to be the infrared receiving tube 13 in the infrared receiving array 2 of adjacent sets.
In order further to reduce the touch blind area between the two adjacent groups touch signal induction system, the present invention can also adopt following design: with reference to Fig. 5, the distance in one group of infrared emission array 1 between adjacent two infrared transmitting tubes 12 is not less than the width of infrared transmitting tube 12.Limit section has at least an infrared transmitting tube 12 to be arranged between adjacent two infrared transmitting tubes 12 in the adjacent sets infrared emission array 1 in one group of infrared emission array 1, and the limit section of the limit section of one group of infrared emission array 1 and adjacent sets infrared emission array 1 forms the serrate occlusion structure.Distance in one group infrared receiving array 2 between adjacent two infrared receiving tubes 13 is not less than the width of infrared receiving tube.Infrared receiving tube 13 in the infrared receiving array 2 is oppositely arranged with infrared transmitting tube 12, and the limit section of the limit section of one group of infrared receiving array 2 and the infrared receiving array 2 of adjacent sets forms the serrate occlusion structure.
With reference to Fig. 5, the infrared transmitting tube 12 between adjacent two infrared transmitting tubes 12 in one group of infrared emission array 1 can be located along the same line with adjacent two infrared transmitting tubes 12 and to arrange.Certainly, also can be positioned on the different straight lines and arrange.
With reference to Fig. 3, at least two group infrared emission arrays about 1 are arranged successively and are parallel to each other, and the infrared receiving array about 2 of at least two groups is arranged successively and is parallel to each other.The run-in index structure tends to exist the dead band between at least two group touch signal induction systems, in order to reduce the touch blind area between the two adjacent groups touch signal induction system, the present invention can adopt following design: with reference to Fig. 4, at least two group infrared emission arrays 1 front and back are overlapping arranges and is parallel to each other, and the infrared receiving array of at least two groups 2 front and back are overlapping arranges and be parallel to each other.One group of infrared emission array 1 is positioned on the Different Plane with adjacent sets infrared emission array 1, and one group infrared receiving array 2 is positioned on the Different Plane with the infrared receiving array 2 of adjacent sets.
The arranging density of the infrared reception LED limit section of the infrared receiving array 2 of touch signal induction system is greater than the arranging density at middle part.To guarantee that limit section has good scanning accuracy.Infrared reception LED in the infrared receiving array 2 adopts the infrared reception LED of flat.
The arranging density of the infrared emission LED limit section of the infrared emission array 1 of touch signal induction system is greater than the arranging density at middle part.To guarantee that limit section has good scanning accuracy.Infrared emission LED in the infrared emission array 1 adopts the infrared emission LED of flat.
The infrared emission array 1 of one touch signal induction system, adjacent with the infrared receiving array 2 of another touch signal induction system, about arrange successively and be parallel to each other.Signal disturbs between two touch signal induction systems to avoid.
The infrared emission array 1 of one touch signal induction system, adjacent with the infrared receiving array 2 of another touch signal induction system, about arrange along same straight line successively.
Also comprise transparent touch pad and a touch pad framework, touch pad is embedded in the touch pad framework.The touch pad below is provided with at least one infrared emission array 1 on one side, and relative at least another side is provided with infrared receiving array 2.The transmitting terminal of the infrared transmitting tube 12 in the infrared emission array 1 is towards the touch pad top.The corresponding reflective device of emission that infrared transmitting tube 12 emitted lights is played reflex that is provided with in touch pad top.The receiving end of the infrared receiving tube 13 in the infrared receiving array 2 is towards the touch pad top.Corresponding being provided with in touch pad top receives the reflective device of reception that light plays reflex to infrared receiving tube 13.Launch the light reflection direction of reflective device, towards the light receive direction that receives reflective device.
Realize following light path by above-mentioned design, arrive after the light that infrared emission array 1 is launched reflects through the reflective device of emission and receive reflective device, and after receiving reflective device reflection, arrive infrared receiving array 2, and by infrared receiving array 2 perception.Thereby realize the perception to the touch point on touch pad.
Touch pad is embedded in the touch pad framework, carries out easily the waterproof setting between touch pad and the touch pad framework, and next the present invention of prerequisite of waterproof can realize waterproof between touch pad and touch pad framework.Scribble the waterproof sealing glue-line between touch pad and the touch pad framework, tight to guarantee sealing, dustproof and waterproof.
Launch reflective device and adopt triangular prism, receive reflective device and also adopt triangular prism, the vertical edge of two triangular prisms is oppositely arranged.Vertical edge is exposed to the outside, is not easy to deposit dust, and appearance looks elegant.Launch the square reflecting prism that reflective device adopts tangent plane to be square, receive reflective device and also adopt square reflecting prism; Be provided with a reflecting surface in the square reflecting prism, reflecting surface is respectively an incidence surface, an exiting surface towards two sides of square reflecting prism; The exiting surface of launching reflective device is oppositely arranged with the incidence surface that receives reflective device.
In the specific design for a touch signal induction system:
The microprocessor system determines that the mode of cross-point 14 can be in the touch sensible accessory circuit:
One, obtain following data:
When (1) determining that each infrared transmitting tube 12 is lighted respectively, at least three infrared receiving tubes 13 of response are divided to an infrared receiving tube group with at least three infrared receiving tubes 13, by the microprocessor system log (SYSLOG) respectively;
(2) determine 2 relative distances of infrared emission array 1 and infrared receiving array, by the microprocessor system log (SYSLOG);
(3) determine the relative position of infrared transmitting tube 12 in infrared emission array 1, and the relative position of infrared receiving tube 13 in infrared receiving array 2, by the microprocessor system log (SYSLOG);
Two, calculate cross-point 14 location methods:
(1) according to the relative position of infrared transmitting tube 12 in infrared emission array 1, and infrared emission array 1 and 2 relative distances of infrared receiving array, determine position and the angle of each the bar light place straight line between each infrared receiving tube 13 in infrared transmitting tube 12 and the corresponding infrared receiving tube group, and be designated as a straight line group information;
(2) determine have at least two staggered group infrared receiving tube groups, and definite at least two infrared receiving tube 13 corresponding two groups of straight line group information, according to position and the angle of two groups of straight line group information cathetuss, determine crossing straight line, and determine cross-point 14 relative positions.
The method of determining cross-point 14 in (2) can be to utilize by two intersecting straight lines, two infrared receiving tubes 13, two triangles that infrared receiving tube 13 consists of, and uses the triangulation calculation rule to calculate cross-point 14 relative positions.
The relative distance of mentioning in the above-mentioned design, relative position refer to distance and the position relative with touch area 4, can be concrete sizes, also can be the proportionate relationships between each geometric data.Can obtain on the basis that the microprocessor system only carry out relative simple computation the position of cross-point 14 by above-mentioned design, for the position of further determining the touch point lays the foundation.
Higher in touch-screen resolution, cross-point 14 is comparatively intensive, and when the touch point is larger, can cover on many straight lines that interlock in twos, namely there is the staggered light of two bundles at least two the cross-point 14 all to be blocked, form at least two when being blocked cross-point 14, the microprocessor system determines the position, touch point in the following way: the position of judging each cross-point 14 that is blocked, the distance of each be blocked 1 of cross-point 14 and infrared emission array relatively, get apart from the infrared emission array 1 nearest cross-point 14 that is blocked and be the cross-point 14 that effectively is blocked, as the position, touch point.
Exist at least two with nearest being blocked during cross-point 14 of infrared emission array 1, the microprocessor system is considered as the middle part that the touch point is positioned at least two cross-points 14 that are blocked.
By above-mentioned design, can effectively solve higher in touch-screen resolution, cross-point 14 is comparatively intensive and the touch point exists when being blocked in a large number cross-point 14 when larger, is not easy to judge the problem of position, touch point.
The generation of cross-point 14 information can be in the following ways:
(1) before carrying out touch point identification work, first-selection is obtained cross-point 14 relative positions, and the relative position of each cross-point 14 corresponded in the touch area 4, and be stored into microprocessor system formation database, and there is the touch point, form when being blocked cross-point 14, the microprocessor system determines the cross-point 14 that is blocked, and transfer database information, obtain in the touch area 4 positions corresponding with the cross-point 14 of being blocked, thereby determine the position, touch point.This design can reduce the calculated amount of microprocessor system in the touch operation.
(2) when carrying out touch operation, there is the cross-point 14 that is blocked determining, then determine the position, touch point by calculating cross-point 14 location methods.This design can reduce the memory data output in the microprocessor system.
With reference to Fig. 6, for the method for determining cross-point 14 is simplified, can be in the following ways:
In the hardware, infrared receiving tube 13 in infrared transmitting tube 12 and the corresponding infrared receiving tube group is the correlation relation, the microprocessor system scans the touch point in the touch area 4 by touch sensible accessory circuit control infrared emission array 1 and infrared receiving array 2.Scanning in the situation of touch point, the microprocessor system determines the position of at least one cross-point 14 that the touch point covers by moving the axle scanning algorithm, thereby obtains the positional information of touch point in touch area 4.
Move the axle scanning algorithm and refer to, at first determine the scattering angle φ of infrared transmitting tube 12 emission efficient light signals.Scattering angle φ refers to that take infrared transmitting tube 12 as the summit infrared receiving tube 13 of arranging the two ends of infrared receiving tube 13 that certainly responds infrared signal draws straight line to infrared transmitting tube 12 respectively, formed angle.The two ends of one row's infrared receiving tube 13 of response infrared signal also are the two ends of corresponding infrared receiving tube group.
Because infrared transmitting tube 12 and two infrared receiving tube 13 relative positions are determined respectively, so scattering angle φ is determined.The infrared receiving tube 13 that the microprocessor system controls in the infrared receiving array 2 is opened, and the infrared transmitting tube 12 in the control infrared emission array 1 is lighted one by one, in infrared emission array 1 and 2 pairs of touch point scanning processes of infrared receiving array, with rectangular coordinate system as a reference, take the length direction of infrared emission array 1 as X-direction, take the direction vertical with X-direction as Y direction;
Wherein scan on the X coordinate axis in the correlation scanning, when determining the infrared receiving tube 13 that is the correlation relation with infrared transmitting tube C1 and being blocked, obtain the X coordinate figure X1 of infrared transmitting tube C1.Wherein on the X coordinate axis during sequential scanning, the X coordinate figure X3 of the infrared transmitting tube C3 when scanning first and occurring blocking.Take the Y coordinate axis coordinate of infrared emission array 1 as Y0, then:
By aforesaid equation, determine coordinate figure Y1, then the coordinate of touch point is X1, Y1.The above-mentioned coordinate relation that embodies in the axle scanning algorithm of moving focuses on embodying the position relationship between touch point, infrared transmitting tube 12, the infrared receiving tube 13, concerns little with choosing of coordinate system itself.The choosing of true origin, X coordinate axis, the Y coordinate axis can be relatively flexible.By determining infrared receiving tube 13 positions at two ends, can simplify calculating.
Can determine in the following way the infrared receiving tube 13 of infrared receiving tube group:
The microprocessor system does not have in touch area 4 in the situation of touch point, open by the infrared receiving tube 13 that the touch sensible accessory circuit is controlled in the infrared receiving array 2, and the infrared transmitting tube 12 in the control infrared emission array 1 is lighted one by one.When an infrared transmitting tube 12 is lighted, the power valve coordinate figure of this infrared transmitting tube 12 under the microprocessor system log (SYSLOG), and record at least two receiving tube coordinate figures of the infrared receiving tube 13 at the two ends that receive the infrared signal of sending, and power valve coordinate figure and corresponding at least two receiving tube coordinate figures are carried out related, and incidence relation stored; Infrared transmitting tube 12 is lighted one by one, finally forms the database of an infrared transmitting tube 12 and corresponding infrared receiving tube group incidence relation.
When the intensity that receives the signal that infrared transmitting tube 12 launches at infrared receiving tube 13 is enough identified, be considered as receiving the signal that infrared transmitting tube 12 sends.Also can set a signal voltage intensity reference value for infrared receiving tube 13, when the signal of launching at infrared transmitting tube 12 makes magnitude of a voltage fluctuation that infrared receiving tube 13 produces greater than the signal voltage intensity reference value, be considered as receiving the signal that infrared transmitting tube 12 sends.The signal voltage intensity reference value can be set to 0.2 volt～2.5 volts.By setting signal voltage strength reference value, be conducive to control flexibly scattering angle φ, so that adjust accuracy of identification.
Can also determine in the following way the infrared receiving tube 13 of infrared receiving tube group:
Determine the coordinate of an infrared transmitting tube 12, then centered by coordinate, symmetrical at least two infrared receiving tubes of appointment 13 are as the infrared receiving tube 13 of infrared receiving tube group.Specified infrared receiving tube 13 should you can be stable the signal of response infrared transmitting tube 12.
Can determine in the following way infrared receiving tube 13 positions at the two ends of infrared receiving tube group:
When determining that infrared transmitting tube 12 is lighted in the infrared emission array 1, one of response infrared signal is arranged the infrared receiving tube 13 at the two ends of infrared receiving tube 13, and the corresponding relation of the infrared receiving tube 13 at the two ends of infrared transmitting tube 12 correspondences in the infrared emission array 1 is formed a database.
Can also determine in the following way infrared receiving tube 13 positions at the two ends of infrared receiving tube group:
Determine the coordinate of an infrared transmitting tube 12, then centered by coordinate, symmetrical two infrared receiving tubes 13 of appointment are as the infrared receiving tube 13 at two ends.Infrared receiving tube 13 distances at each infrared transmitting tube 12 corresponding two ends should be close.
Scattering angle φ is in the database creation process, the coordinate of infrared transmitting tube 12, respectively and receive the angle value that the line between two coordinates of infrared receiving tube 13 at two ends of the infrared signal of sending consists of; In database creation process, according to the power valve coordinate figure of infrared transmitting tube 12, two the receiving tube coordinate figures of infrared receiving tube 13 that receive the two ends of the infrared signal of sending calculate scattering angle φ by the microprocessor system.Scattering angle φ and non-artificial setting, but calculated voluntarily by the structural parameters of equipment itself, precision can be improved.
Infrared transmitting tube 12 is for adopting wide-angle infrared transmitting tube 12.The signal of each infrared transmitting tube 12 emissions in the infrared emission array 1 is by three infrared receiving tubes 13 identifications in the infrared receiving array 2, the vertical line of dividing equally between two other infrared receiving tube 13 of line between the infrared receiving tube 13 in infrared transmitting tube 12 and three infrared receiving tubes 13.
Larger when touch area 4, when the present invention was the large scale infrared touch panel, infrared emission array 1 was arranged on 4 two long limits, touch area with infrared receiving array 2, and is oppositely arranged.Guarantee that large-sized the present invention 4 all can accurately touch in the touch area, in order to guarantee its precision.
Less when touch area 4, when the present invention was the small size infrared touch panel, infrared emission array 1 was arranged on 4 two minor faces in touch area with infrared receiving array 2, and is oppositely arranged.When guaranteeing that touch area 4 can touch, reduce the quantity of infrared transmitting tube 12 and infrared receiving tube 13, so that Cost reduction.
The acquiescence radius of touch point can be 5mm, the both sides that namely the are defaulted as the touch point respectively distance between two infrared transmitting tubes 12 that the Y coordinate axis is blocked are 5mm, the both sides of the touch point respectively distance between two infrared transmitting tubes 12 that the X coordinate axis is blocked are 5mm, by the acquiescence radius touch point position judgment are revised.None-identified goes out true touch point in the microprocessor system, and it is real perhaps to identify a large amount of true touch points, calls the acquiescence radius.The acquiescence radius is set, and excessive, the complex calculation of recognizing site deviation appears in the equipment that can prevent, even the problem such as deadlock.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (17)
1. bilateral combined type touches screen, comprises the touch signal induction system, and described touch signal induction system comprises the infrared emission array, and the infrared receiving array that is oppositely arranged with described infrared emission array; Also comprise the touch sensible accessory circuit, described touch sensible accessory circuit connects described touch signal induction system, it is characterized in that: comprise at least two described touch signal induction systems; At least two described touch signal induction systems connect described touch sensible accessory circuit;
At least one described touch signal induction system only is provided with one group of infrared emission array and one group of infrared receiving array;
A limit of described touch area is provided with one group of described infrared emission array, another of described touch area limit is provided with one group of described infrared receiving array, described infrared emission array and described infrared receiving array are oppositely arranged, and described infrared receiving array receives the infrared light of described infrared emission array emission;
In the one described touch signal induction system:
Comprise at least two infrared transmitting tubes in the described infrared emission array, the infrared light of one described infrared transmitting tube emission is received by three infrared receiving tubes in the described infrared receiving array at least, i.e. the infrared receiving tube group of at least three infrared receiving tubes compositions of a described infrared transmitting tube correspondence;
Infrared receiving tube at least two described infrared transmitting tubes in corresponding at least two infrared receiving tube groups exists overlapping at arrangement position; Because the infrared receiving tube at least two infrared receiving tube groups exists overlapping at arrangement position, so the light place straight line of at least two infrared transmitting tubes infrared receiving tube in corresponding each infrared receiving tube group exists staggered, and having the cross-point of determining, the position of described cross-point is obtained by a microprocessor system; Described microprocessor system connects described touch sensible accessory circuit;
Be positioned at least two described straight lines at the touch part, and wherein have at least two straight lines to have at least one cross-point; Namely, when touching part and sheltering from least two the corresponding light of described straight line that has a cross-point, then described microprocessor system is judged as the formed touch point of described touch part and covers at least one described cross-point, namely has at least a described cross-point place that the touch point is arranged.
2. bilateral combined type according to claim 1 touches screen, it is characterized in that, at least two described touch signal induction systems only are provided with respectively one group of described infrared emission array and one group of described infrared receiving array, namely comprise the described infrared emission array of at least two groups and two groups of described infrared receiving arraies;
Infrared receiving tube at least two described infrared transmitting tubes in corresponding at least two infrared receiving tube groups exists overlapping at arrangement position, the infrared receiving tube at overlapping place is shared by described two infrared receiving tube groups.
3. bilateral combined type according to claim 2 touches screen, it is characterized in that, arranges along same straight line successively about the described infrared emission array of at least two groups, arranges along same straight line successively about the described infrared receiving array of at least two groups.
4. bilateral combined type according to claim 3 touches screen, it is characterized in that, the infrared light of the infrared transmitting tube emission adjacent with the described infrared emission array of adjacent sets is received by at least one infrared receiving tube in the described infrared receiving array of adjacent sets in one group of described infrared emission array;
Described microprocessor system is when determining cross-point, and control touch sensible accessory circuit is lighted infrared transmitting tube from one group of described infrared emission array to the described infrared emission array of adjacent sets respectively one by one;
In the corresponding infrared receiving tube group of infrared transmitting tube adjacent with the described infrared emission array of adjacent sets, have at least one to be the infrared receiving tube in the described infrared receiving array of adjacent sets.
5. bilateral combined type according to claim 3 touches screen, it is characterized in that, the distance in one group of described infrared emission array between adjacent two infrared transmitting tubes is not less than the width of described infrared transmitting tube;
Limit section has at least an infrared transmitting tube to be arranged between adjacent two infrared transmitting tubes in the described infrared emission array of adjacent sets in one group of described infrared emission array, and the limit section of the limit section of one group of described infrared emission array and the described infrared emission array of adjacent sets forms the serrate occlusion structure;
Distance in one group of described infrared receiving array between adjacent two infrared receiving tubes is not less than the width of described infrared receiving tube;
Infrared receiving tube and described infrared transmitting tube in the described infrared receiving array are oppositely arranged, and the limit section of one group of described infrared receiving array and the limit section of the described infrared receiving array of adjacent sets form the serrate occlusion structure.
6. bilateral combined type according to claim 2 touches screen, it is characterized in that, arranges successively and is parallel to each other about the described infrared emission array of at least two groups, arranges successively and is parallel to each other about the described infrared receiving array of at least two groups.
7. bilateral combined type according to claim 6 touches screen, it is characterized in that, the described infrared emission array of at least two groups front and back are overlapping arranges and be parallel to each other, and the described infrared receiving array of at least two groups front and back are overlapping arranges and be parallel to each other;
One group of described infrared emission array and the described infrared emission array of adjacent sets are positioned on the Different Plane, and one group of described infrared receiving array and the described infrared receiving array of adjacent sets are positioned on the Different Plane.
According to claim 3 or 6 described bilateral combined types touch screen, it is characterized in that the arranging density of the infrared reception LED limit section of the described infrared receiving array of described touch signal induction system is greater than the arranging density at middle part; The arranging density of the infrared emission LED limit section of the described infrared emission array of described touch signal induction system is greater than the arranging density at middle part;
Described infrared emission array in the two described touch signal induction systems is positioned at the screen homonymy, two described touch signal induction system adjacent dislocation sweep time.
9. bilateral combined type according to claim 1 touches screen, it is characterized in that also comprise transparent touch pad and a touch pad framework, described touch pad is embedded in the described touch pad framework; Described touch pad below is provided with at least one described infrared emission array on one side, and relative at least another side is provided with described infrared receiving array;
The transmitting terminal of the described infrared transmitting tube in the described infrared emission array is towards described touch pad top; The corresponding reflective device of emission that described infrared transmitting tube emitted light is played reflex that is provided with in described touch pad top;
The receiving end of the described infrared receiving tube in the described infrared receiving array is towards described touch pad top; Corresponding being provided with in described touch pad top receives the reflective device of reception that light plays reflex to described infrared receiving tube;
The light reflection direction of the reflective device of described emission is towards the light receive direction of the reflective device of described reception.
10. bilateral combined type according to claim 9 touches screen, it is characterized in that, scribbles the waterproof sealing glue-line between described touch pad and the described touch pad framework, and is tight to guarantee sealing, dustproof and waterproof.
11. according to claim 9 or 10 described bilateral combined types touch screen, it is characterized in that the reflective device of described emission adopts triangular prism, the reflective device of described reception also adopts triangular prism, the vertical edge of two described triangular prisms is oppositely arranged.
12. according to claim 9 or 10 described bilateral combined types touch screen, it is characterized in that, the square reflecting prism that the reflective device of described emission adopts tangent plane to be square, the reflective device of described reception also adopts square reflecting prism; Be provided with a reflecting surface in the described square reflecting prism, described reflecting surface is respectively an incidence surface, an exiting surface towards two sides of square reflecting prism; The incidence surface of the described exiting surface of the reflective device of described emission and the reflective device of described reception is oppositely arranged.
13. bilateral combined type according to claim 2 touches screen, it is characterized in that, described microprocessor system determines that the mode of cross-point is:
One, obtain following data:
When (1) determining that each described infrared transmitting tube is lighted respectively, at least three described infrared receiving tubes of response are divided to a described infrared receiving tube group with at least three described infrared receiving tubes, by described microprocessor system log (SYSLOG) respectively;
(2) determine relative distance between described infrared emission array and described infrared receiving array, by described microprocessor system log (SYSLOG);
(3) determine the relative position of described infrared transmitting tube in described infrared emission array, and the relative position of described infrared receiving tube in described infrared receiving array, by described microprocessor system log (SYSLOG);
Two, calculate the cross-point location method:
(1) according to the relative position of described infrared transmitting tube in described infrared emission array, and relative distance between described infrared emission array and described infrared receiving array, determine position and the angle of each the bar light place straight line between each infrared receiving tube in described infrared transmitting tube and the corresponding described infrared receiving tube group, and be designated as a straight line group information;
(2) determine to exist at least two staggered group infrared receiving tube groups, and definite at least two corresponding two groups of straight line group information of infrared receiving tube, according to position and the angle of two groups of straight line group information cathetuss, determine crossing straight line, and determine the cross-point relative position.
14. bilateral combined type according to claim 13 touches screen, it is characterized in that, the method of determining cross-point in (2) is to utilize by two intersecting straight lines, two infrared receiving tubes, two triangles that infrared receiving tube consists of, and uses the triangulation calculation rule to calculate the cross-point relative position.
15. bilateral combined type according to claim 14 touches screen, it is characterized in that, in the hardware, infrared receiving tube in described infrared transmitting tube and the corresponding described infrared receiving tube group is the correlation relation, described microprocessor system controls described infrared emission array and infrared receiving array by described touch sensible accessory circuit, and the touch point in the described touch area is scanned;
Scanning in the situation of touch point, described microprocessor system determines the position of at least one described cross-point that the touch point covers by moving the axle scanning algorithm, thereby obtains the positional information of touch point in the touch area;
The described axle scanning algorithm of moving refers to, at first determines the scattering angle φ of described infrared transmitting tube emission efficient light signal;
Described scattering angle φ refers to that take described infrared transmitting tube as the summit a described infrared receiving tube of arranging the two ends of described infrared receiving tube that certainly responds infrared signal draws straight line to described infrared transmitting tube respectively, formed angle; The two ends of the described infrared receiving tube of one row of response infrared signal also are the two ends of corresponding described infrared receiving tube group;
Because described infrared transmitting tube and two described infrared receiving tube relative positions determine that respectively therefore described scattering angle φ is determined;
The infrared receiving tube that described microprocessor system controls in the described infrared receiving array is opened, and the infrared transmitting tube of controlling in the described infrared emission array is lighted one by one, described infrared emission array and described infrared receiving array to the touch point scanning process in, with rectangular coordinate system as a reference, take the length direction of infrared emission array as X-direction, take the direction vertical with X-direction as Y direction;
Wherein scan on the X coordinate axis in the correlation scanning, when determining the infrared receiving tube that is the correlation relation with infrared transmitting tube C1 and being blocked, obtain the X coordinate figure X1 of infrared transmitting tube C1;
Wherein on the X coordinate axis during sequential scanning, the X coordinate figure X3 of the infrared transmitting tube C3 when scanning first and occurring blocking;
Take the Y coordinate axis coordinate of infrared emission array as Y0, then:
By aforesaid equation, determine coordinate figure Y1, then the coordinate of touch point is X1, Y1.
16. bilateral combined type according to claim 1 touches screen, it is characterized in that, determines in the following way the described infrared receiving tube of described infrared receiving tube group:
Described microprocessor system does not have in the touch area in the situation of touch point, open by the infrared receiving tube that described touch sensible accessory circuit is controlled in the described infrared receiving array, and the infrared transmitting tube of controlling in the described infrared emission array is lighted one by one;
When an infrared transmitting tube is lighted, the power valve coordinate figure of this infrared transmitting tube under the described microprocessor system log (SYSLOG), and record at least two receiving tube coordinate figures of the infrared receiving tube at the two ends that receive the infrared signal of sending, and power valve coordinate figure and corresponding at least two receiving tube coordinate figures are carried out related, and incidence relation stored; Infrared transmitting tube is lighted one by one, finally forms the database of an infrared transmitting tube and corresponding infrared receiving tube group incidence relation.
17. bilateral combined type according to claim 1 touches screen, it is characterized in that, determines in the following way the described infrared receiving tube position at the two ends of described infrared receiving tube group:
Determine the coordinate of an infrared transmitting tube, then centered by described coordinate, symmetrical two described infrared receiving tubes of appointment are as the described infrared receiving tube at two ends; The described infrared receiving tube distance at each corresponding two ends of described infrared transmitting tube should be close;
Described scattering angle φ is the coordinate of infrared transmitting tube in the described database creation process, respectively and receive the angle value that the line between two coordinates of infrared receiving tube at two ends of the infrared signal of sending consists of; In described database creation process, according to the power valve coordinate figure of infrared transmitting tube, two the receiving tube coordinate figures of infrared receiving tube that receive the two ends of the infrared signal of sending calculate described scattering angle φ by the microprocessor system; Described scattering angle φ is that the structural parameters by equipment itself calculate voluntarily.
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| CN201110300512.6A CN103019460B (en) | 2011-09-28 | 2011-09-28 | Bilateral combination type touch screen |
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| CN201110300512.6A CN103019460B (en) | 2011-09-28 | 2011-09-28 | Bilateral combination type touch screen |
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| CN105808017B (en) * | 2014-12-31 | 2023-10-24 | 鸿合科技股份有限公司 | Infrared touch screen covered by multiple scanning groups |
| CN106383617A (en) * | 2016-09-21 | 2017-02-08 | 广州华欣电子科技有限公司 | Touch frame and touch-control method |
| CN106383617B (en) * | 2016-09-21 | 2020-02-07 | 广州华欣电子科技有限公司 | Touch frame and touch method |
| CN108021264A (en) * | 2017-05-24 | 2018-05-11 | 上海优熠电子科技有限公司 | Three side formula infrared touch panels |
| CN108873089A (en) * | 2018-08-24 | 2018-11-23 | 中控智慧科技股份有限公司 | A kind of infrared detecting device and screening machine and security check passage and mechanical equipment |
| CN110275645A (en) * | 2019-06-12 | 2019-09-24 | 青岛海信商用显示股份有限公司 | Touch point recognition methods, touch point identification device, storage medium and touch device |
| 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 |
| CN112923874A (en) * | 2021-01-28 | 2021-06-08 | 广州视源电子科技股份有限公司 | Intelligent interactive flat plate and method and device for detecting flatness of spliced screen |
| CN112923874B (en) * | 2021-01-28 | 2023-06-20 | 广州视源电子科技股份有限公司 | Intelligent interaction flat plate and method and device for detecting flatness of spliced screen |
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