CN106775135B - Method and device for positioning touch point on infrared touch device and terminal equipment - Google Patents
Method and device for positioning touch point on infrared touch device and terminal equipment Download PDFInfo
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- CN106775135B CN106775135B CN201610999208.8A CN201610999208A CN106775135B CN 106775135 B CN106775135 B CN 106775135B CN 201610999208 A CN201610999208 A CN 201610999208A CN 106775135 B CN106775135 B CN 106775135B
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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
Abstract
The embodiment of the application provides a method and a device for positioning a touch point on an infrared touch device and a terminal device, wherein the identification method provided by the invention comprises the following steps: in a scanning period, scanning a light path in a scanning direction, and defining an initial outline of a target touch point by using a parameter of a position of an intersection point of the light path which is shielded by the target touch point; the optical path capable of executing scanning forms a virtual optical network, and the optical path passing through the intersection point of the optical path in the virtual optical network on the periphery of the initial contour is scanned again; and after the secondary scanning is finished, the light path is shielded by the target touch point to form a plurality of intersection points, and the outline of the target touch point is redefined according to the plurality of intersection point position parameters. And selecting part of scanning light paths in all scanning light paths according to the initial profile and scanning the initial profile again, so that the number of scanning light paths executed when the infrared touch device identifies the touch points is reduced.
Description
Technical Field
The invention relates to the field of infrared touch control, in particular to a method and a device for positioning a touch point on an infrared touch control device and terminal equipment.
Background
The infrared touch device is characterized in that a plurality of infrared transmitting tubes are arranged on two adjacent sides of the infrared touch device, a plurality of infrared receiving tubes are arranged on the other two adjacent sides of the infrared touch device, the infrared transmitting tubes correspond to the infrared transmitting tubes arranged on the opposite sides, the infrared transmitting tubes transmit infrared light outwards, the corresponding infrared receiving tubes receive the infrared light, and the structural schematic diagram of the infrared touch device is shown in fig. 1. Generally, an infrared transmitting tube corresponds to a plurality of infrared receiving tubes, when an infrared transmitting tube emits infrared light, the plurality of receiving tubes on the opposite side receive the transmitted infrared light at the same time, a line along which the infrared light reaches the receiving tubes on the opposite side from the transmitting tube is a scanning light path, other infrared transmitting tubes and infrared receiving tubes form other corresponding light paths in sequence, the slopes of adjacent light paths are the same, each group of infrared transmitting tubes form one light path, the infrared receiving tubes in each light path receive the infrared light emitted by the infrared transmitting tube to realize the scanning of the touch screen, wherein the scanning direction is called when the outer transmitting tubes scan with the same slope, and each infrared transmitting tube has a plurality of scanning directions.
When a user performs touch operation on the infrared touch device, the touch point can shield part of infrared light emitted by the infrared emission tube, namely part of light paths, the infrared receiving tube corresponding to the shielded light paths cannot receive the infrared light, and the shape and the position of the touch point are determined according to the shielded state of each light path and the corresponding infrared receiving tube through global scanning of the whole optical network.
When the infrared touch device in the related art identifies a touch point, global scanning and algorithm calculation are directly performed on the touch point according to a preset rule, and the touch point is scanned and identified through a light path shielding condition between an infrared transmitting tube and an infrared receiving tube. However, in the related art, in the scanning of the infrared touch device, all scanning light paths in the infrared touch device are used for scanning all touch points to obtain a touch point identification area, the touch point identification method cannot select a proper scanning light path according to the position of the touch point to perform scanning, and the scanning is performed by directly executing all scanning light paths, and the number of scanning light paths used for identifying the touch points in the infrared touch device is large.
Disclosure of Invention
In order to overcome the problems in the related art, the present invention provides a method and an apparatus for positioning touch points on an infrared touch device, so as to reduce the number of scanning optical paths executed when the infrared touch device identifies the touch points.
In a first aspect, an embodiment of the present invention provides a method for positioning a touch point profile with reduced scanning light path on an infrared touch device, where the method includes:
in a scanning period, scanning a light path in a scanning direction, and defining an initial outline of a target touch point by using a parameter of a position of an intersection point of the light path which is shielded by the target touch point;
the optical path capable of executing scanning forms a virtual optical network, and the optical path passing through the intersection point of the optical path in the virtual optical network on the periphery of the initial contour is scanned again;
and after the secondary scanning is finished, the light path is shielded by the target touch point to form a plurality of intersection points, and the outline of the target touch point is redefined according to the plurality of intersection point position parameters.
In a second aspect, an embodiment of the present invention further provides a touch point contour positioning apparatus for reducing a scanning light path on an infrared touch device, where the touch point contour positioning apparatus includes:
the initial scanning module is used for scanning a light path in a scanning direction in a scanning period, and defining an initial outline of a target touch point by using a parameter of a position of an intersection point of the light path which is shielded by the target touch point;
a scanning light path obtaining module, configured to form a virtual optical network from a light path capable of performing scanning, and scan a light path passing through a light path intersection point in the virtual optical network on the periphery of the initial profile;
and the correction scanning module is used for forming a plurality of intersection points by shielding the light path by the target touch point after the secondary scanning is finished, and redefining the outline of the target touch point according to the position parameters of the intersection points.
In a third aspect, the present application further provides an infrared touch terminal device, which includes a processor, a transmitting and scanning circuit, a receiving and scanning circuit, an infrared transmitting tube matrix, and an infrared receiving tube matrix, where the processor is configured to execute the program code provided by the method in the first aspect.
Compared with the related art, the technical scheme provided by the application of the invention has the beneficial effects that:
in the method and the device for positioning the touch point contour for reducing the scanning light path on the infrared touch control equipment and the infrared touch control terminal equipment, in a scanning period, a light path in a scanning direction is scanned first, and the initial contour of a target touch point is defined by the intersection point position parameter of the light path shielded by the target touch point; the optical path capable of executing scanning forms a virtual optical network, and the optical path passing through the intersection point of the optical path in the virtual optical network on the periphery of the initial contour is scanned again; and after the secondary scanning is finished, the light path is shielded by the target touch point to form a plurality of intersection points, and the outline of the target touch point is redefined according to the plurality of intersection point position parameters.
The method comprises the steps of firstly executing a light path in a scanning direction to scan a touch point to obtain an initial contour, roughly positioning the initial contour position of the touch point in advance by using fewer scanning light paths, then determining a high-probability shelterable light path of the touch point by using the initial contour position as a central position and a plurality of light path intersection points in a virtual optical network capable of executing scanning, and finely scanning the high-probability shelterable light path to determine a more accurate contour of the touch point. Therefore, accurate scanning and positioning are carried out only by the light path which can be shielded with high probability, the number of scanning light paths is reduced compared with the positioning method of global scanning in the prior art, and the scanning and positioning efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an infrared touch device in the related art;
fig. 2 is a flowchart of a method for positioning a touch point profile for reducing a scanning light path on an infrared touch device according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of an initial profile provided in an embodiment of the present invention;
FIG. 4 is a schematic view of an enclosed area provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of an optical path through an intersection point provided in an embodiment of the present invention;
FIG. 6 is a schematic diagram of an optical path for performing a rescan as provided in an embodiment of the present invention;
FIG. 7 is a schematic diagram of an intersection point of blocked optical paths provided in an embodiment of the present invention;
FIG. 8 is a schematic view of an enclosed area provided in an embodiment of the present invention;
FIG. 9 is a schematic illustration of a redefined profile provided in an embodiment of the present invention;
FIG. 10 is a schematic view of an enclosed area provided by an embodiment of the present invention;
FIG. 11 is a schematic diagram of an optical path through an intersection point provided by an embodiment of the present invention;
FIG. 12 is a schematic diagram of an optical path for performing a rescan according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of an intersection point of blocked optical paths according to an embodiment of the present invention;
FIG. 14 is a schematic illustration of a redefined profile provided by an embodiment of the present invention;
FIG. 15 is a schematic diagram of the location of an intersection provided by an embodiment of the present invention;
FIG. 16 is a schematic view of a fully covered enclosed area provided by an embodiment of the present invention;
FIG. 17 is a schematic diagram of an optical path through an intersection point provided by an embodiment of the present invention;
FIG. 18 is a schematic diagram of an intersection of blocked optical paths according to an embodiment of the present invention;
FIG. 19 is a schematic illustration of a redefined profile provided by an embodiment of the present invention;
fig. 20 is a schematic diagram of a touch point contour positioning apparatus for reducing a scanning light path on an infrared touch device according to an embodiment of the present invention;
fig. 21 is an infrared touch terminal device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some preferred schemes or non-preferred schemes in the application have certain advantages and defects respectively in specific application scenes, the technology in the field can be selected and set according to the requirements of the specific application scenes, and the protection range of the application is not affected by the change.
As described in the background art, when a touch point is identified in the related art, all scanning optical paths in the infrared touch device are executed to scan the touch point, and the touch point is identified according to the shielded condition of the scanning optical path.
The invention provides a touch point outline positioning method for reducing scanning light paths on infrared touch equipment.
In one aspect, an embodiment of the present application provides a method for locating a touch point contour used for reducing a scanning light path on an infrared touch device, where the method is applied to the infrared touch device, the infrared touch device includes a plurality of infrared transmitting tubes and a plurality of infrared receiving tubes, one infrared transmitting tube transmits infrared light to one or more infrared receiving tubes corresponding to the one infrared transmitting tube, and the infrared receiving tube is used for receiving the transmitted infrared light. Fig. 2 is a schematic flow chart of a method for positioning a touch point profile for reducing a scanning light path on an infrared touch device according to an embodiment of the present application, and the implementation of the present invention will be specifically described below with reference to the drawings in the specification.
Step S110, in a scanning period, first scanning an optical path in a scanning direction, and defining an initial profile of the target touch point by using a parameter of a position of an intersection of the optical path blocked by the target touch point.
For example, in the scanning direction in the background art, scanning is performed on an optical path in one scanning direction on an infrared emission edge, in one scanning period, infrared light is emitted by an infrared emission tube on the infrared emission edge in one scanning direction in sequence, infrared light is received by a corresponding infrared receiving tube on the infrared emission edge, and intersection position parameters of the scanning optical path shielded by a touch point are determined, wherein the position parameters include position coordinates of each intersection, a closed area contour surrounded by sequential connection lines of intersection points of the optical path is an initial contour of a target touch point, and the sequential connection lines include sequential connection of the intersection points in a clockwise or counterclockwise direction. Illustratively, as shown in fig. 3, the scanning direction perpendicular to the infrared emission edge is taken as the initial scanning direction, the optical path of the direction on the emission edge is performed to scan the target touch point, the intersection points of the blocked 4 scanning optical paths are m1, m2, m3 and m4, and the closed region contour surrounded by the sequential connection lines of the intersection points m1, m2, m3 and m4 is taken as the initial contour.
Step S120, the optical path capable of performing scanning forms a virtual optical network, and the optical path passing through the intersection point of the optical path in the virtual optical network on the periphery of the initial contour is scanned again.
In the infrared touch device, all light paths capable of executing scanning form a virtual light network, in the virtual light network, two light paths in different scanning directions are intersected to obtain an intersection point, a plurality of light paths in different scanning directions are respectively intersected, the virtual light network formed by the light paths capable of executing scanning comprises a plurality of light path intersection points, the position parameters of the intersection points are determined, and in the light paths in the virtual light network, the light paths passing through the intersection points at the periphery of an initial contour are selected to execute scanning again.
It should be noted that the virtual optical network is formed by all executable scanning optical paths in the infrared touch device, where the executable scanning optical paths are scanning optical paths executed by the infrared touch device according to an instruction of a scanning instruction, but scanning is not actually executed. For example, as shown in fig. 1, 1 ir emitting lamp can be paired with 3 ir receiving lamps facing each other, and optical path scanning in 3 scanning directions is performed, so that each ir emitting lamp has 3 executable scanning optical paths, i.e. a plurality of executable scanning optical paths can form a virtual optical network.
As shown in fig. 4, the optical path for performing the rescanning is selected for the initial profile shown in fig. 3, the intersection points a1, a2 and a3 of the optical path located at the periphery of the initial profile are selected in the virtual optical network, and as shown in fig. 5, the optical path passing through the intersection points a1, a2 and a3 in the virtual optical network is selected, wherein the optical path selected for the rescanning does not include the optical path on which the scanning has been performed, so the optical path for the rescanning does not include the optical path perpendicular to the direction of the infrared emission edge, and the optical path selected for performing the rescanning is shown in fig. 6. The rescanning is performed according to the optical path selected in fig. 6.
And step S130, after the secondary scanning is finished, the light path is shielded by the target touch point to form a plurality of intersection points, and the outline of the target touch point is redefined according to the position parameters of the intersection points.
And executing the light path determined in the step S120 to scan again, determining an intersection point of the shielded scanning light path in the light path scanned again, acquiring position parameters of the intersection point, sequentially connecting the intersection points to enclose a closed region, and redefining the outline of the target touch point. In the secondary scanning, the optical path determined according to the initial contour comprises the optical path which is not scanned in the initial scanning and the optical path which is scanned already, the optical path which is not scanned in the initial scanning is scanned again, after the secondary scanning is finished, the intersection point of the optical path is determined according to whether all the optical paths determined in the secondary scanning are shielded by the touch point, the optical path shielded by the target touch point forms a plurality of intersection points, and the contour of the target touch point is redefined according to the position parameters of the intersection points.
Specifically, when the outline of the target touch point is redefined according to the position parameters of the intersection points, the outline of the target touch point is redefined according to the intersection points on the periphery of the initial outline, when rescanning is performed, because the shielded scanning light path can form the intersection points, the intersection points form a plurality of intersection point combinations, the intersection points in each intersection point combination are sequentially connected to form a plurality of closed areas, the position parameters of the intersection points in the intersection point combination of the largest closed area are determined, and the outline of the target touch point is redefined according to the determined intersection point position parameters.
As shown in fig. 7, after the optical paths for rescanning shown in fig. 6 are executed, 1 optical path is not occluded by the touch point, the intersection points of 5 optical paths occluded by the target touch point are e1, e2, e3 and e4, the position parameters of the intersection points are determined, the intersection points e1, e2, e3 and e4 are all located at the periphery of the initial profile, the profile of the target touch point is redefined according to the intersection points, the intersection points of the determined initial profile are m1, m2, m3 and m4 when the touch point is initially scanned, after rescanning, a plurality of occluded optical paths are intersected to form a plurality of intersection points, the plurality of intersection points form a plurality of intersection point combinations, the intersection point sequential connecting lines of the intersection point combinations can form a plurality of closed regions, as shown in fig. 8, two closed regions are exemplified, one of which is defined by the intersection points e1, e2, e3, m4 and e4, and the second closed region is defined by m1, e2, e3, m4 and e4, the coverage area of the first closed area is larger than that of the second closed area, and compared with other closed areas not exemplified in the embodiment, the first closed area is the largest closed area, the outline of the first closed area is more approximate to the real outline shape of the touch point, a more accurate outline of the touch point can be obtained, the outline of the target touch point is redefined by the intersection points e1, e2, e3, m4 and e4 on the outline of the closed area, and the redefined outline is as shown in fig. 9. Compared with the contour obtained after the initial scanning, the redefined initial contour after the re-scanning has the contour shape which is accurate to the target touch point, and the recognition accuracy is higher.
Preferably, in order to obtain a touch point identification area with higher precision and more accurate shape profile, the redefined profile may be scanned again according to steps S120 and S130, an optical path for scanning again is selected for the redefined profile according to step S120, the selected optical path is executed for scanning again, and a position parameter of the intersection point is determined according to the intersection point of the optical path blocked by the touch point after the scanning is completed according to step S130. If the determined intersection point is located outside the outline, redefining the outline of the target touch point according to the position parameter of the intersection point, and if the determined intersection point is located inside the outline or on the boundary of the outline, determining the outline as the final recognition outline of the target touch point.
Illustratively, the processing continues to be performed on the contour region obtained in fig. 9 in steps S120 and S130, an intersection point of an optical path outside the contour is selected in the virtual optical network, a closed contour obtained by sequentially connecting the intersection points of the optical path is shown in fig. 10, an optical path passing through the intersection point on the closed contour and not performing scanning is determined, and the contour is scanned, wherein an optical path passing through the determined intersection point is shown in fig. 11, wherein an optical path used for performing scanning again is shown in fig. 12, and all the optical paths determined in the current scanning include an optical path on which scanning has been performed and an optical path on which scanning has not been performed, and the selected optical path is performed for scanning again. In all the determined light paths, the light path blocked by the touch point has intersection points e5 and e6 outside the outline, the intersection point positions are as shown in fig. 13, the closed region surrounded by the intersection point sequence connecting lines is used for redefining the outline of the touch point as shown in fig. 14 according to the intersection points e5 and e6 determined this time and the position parameters of the intersection point on the outline determined last time, wherein the outline of the touch point determined in fig. 14 has a shape more accurate to the real outline of the target touch point than the outline of the touch point obtained in fig. 9, and the touch point identification outline with higher accuracy is obtained through scanning once again.
When the outline of the touch point is redefined using the intersection point determined this time and the intersection point of the outline determined last time, the intersection point determined last time closest to the intersection point determined this time is discarded in order to more accurately locate the outline of the touch point, and the outline of the touch point closer to the real outline is determined. As shown in fig. 15, the intersection points e1 and m4 which are determined last time as intersection points e1, e2, e3, e4 and m4 and are closest to the intersection points e5 and e6 determined this time are discarded, and the contour is obtained by sequentially connecting the optical path intersection points e5, e2, e3, e6 and e 4.
When scanning is performed after steps S120 and S130 are continuously performed on the contour in fig. 14, the shielded scanning optical path has no intersection point outside the contour, and the contour does not need to be redefined again, the determined contour of the touch point in fig. 14 is the final recognition contour of the touch point, and the scanning is finished. The outline is scanned for multiple times, the light path which can be shielded with high probability around the outline is selected for multiple times to scan according to the redefined outline of the touch point after each scanning, and the outline of the touch point with higher precision and more accurate outline shape can be obtained through circular scanning.
Preferably, a high-probability shelterable optical path is quickly selected from executable scanning optical paths in the virtual optical network, so that the scanning times of the initial profile are reduced, the repeated scanning times are reduced, and the time for acquiring the final recognition profile of the target touch point is shortened. When scanning light paths are selected and executed according to the initial outline, a light path intersection point combination of a minimum closed area which completely covers the initial outline of the touch point is selected based on the fact that a closed area which is defined by sequential connection lines of light path intersection points in a virtual light network which is positioned at the periphery of the initial outline completely covers the initial outline.
Illustratively, as shown in fig. 16, the example gives two enclosed areas of full coverage: the area of the first closed region is smaller than that of the second closed region, and compared with other closed region outlines which completely cover the initial outline and are not illustrated in the embodiment, the coverage area of the first closed region is the minimum, so that the first closed region is the minimum selected closed region. As shown in fig. 17, intersection points b1, b2, b3 and b4 are selected in the virtual optical network, a closed area is defined by the sequential connection of the intersection points b1, b2, b3 and b4, the closed area completely covers the initial contour of the touch point, and the optical path passing through the intersection points on the closed area contour is determined. And executing the rescanning of the optical path which is not scanned in the selected optical path, determining the intersection point of the occluded optical path outside the initial outline and acquiring the position parameter of the intersection point according to all occluded optical paths determined in the secondary scanning after the rescanning is finished, wherein the intersection points of the determined occluded optical paths outside the outline are c1, c2, c3, c4 and c5, the touch point is redefined according to the intersection point position parameter, the outline of the touch point is defined according to the position parameter of the intersection point is the same as the above, and the redefined outline of the touch point is shown in FIG. 19. Wherein the outline in fig. 19 is the same as the outline area in fig. 14. Therefore, the final contour can be obtained by executing one-time scanning, the selection of the high-probability shelterable light path can be quickly completed by once determining the closed contour surrounded by the sequential connecting lines of the intersection points of the light path, the scanning times of the initial contour can be reduced, the final contour of the target touch point can be determined in less scanning times, and the scanning times of the light path and the touch point identification time can be reduced.
It should be noted that, in step S120, when determining the closed region surrounded by the intersection points on the periphery of the initial contour, the position of the initial contour should be taken as the reference, specifically, the coverage area of the selected closed region overlaps with the range of the initial contour, that is, a range with partial or full overlap exists, as shown in fig. 4, the determined closed region partially overlaps with the initial contour, as shown in fig. 17, the determined closed region completely overlaps with the initial contour. In order to obtain a more accurate identification area of the target touch point, in this embodiment, an example is given in which the closed area completely covers the initial contour, and an object is to illustrate that a high-probability shelterable optical path can be quickly obtained by determining the closed contour, the number of scans for identifying the target touch point is reduced, and a final identification contour for the target touch point is determined in a smaller number of scans.
It should be noted that, in this embodiment, a scanning direction forming an angle of 90 ° with the infrared emission edge is selected for explanation, optionally, in step S110, the scanning direction may be an included angle forming an angle of 30 °, 45 °, 60 ° with the infrared emission edge, and a light path in one scanning direction is executed to scan the target touch point, and a closed region surrounded by sequential connection lines of intersection points of the blocked light path is used as an initial contour.
On the other hand, an infrared touch device is provided in the present embodiment, and fig. 20 is a schematic view of an infrared touch device provided in the present embodiment.
An infrared touch device, comprising: an initial scanning module 210 to: in a scanning period, scanning a light path in a scanning direction, and defining an initial outline of a target touch point by using a parameter of an intersection point position of the light path shielded by the target touch point;
a scanning optical path obtaining module 220, configured to: the optical path capable of performing scanning forms a virtual optical network, and the optical path passing through the intersection point of the optical path in the virtual optical network on the periphery of the initial contour is scanned again.
Specifically, when the light path intersection points in the virtual optical network on the periphery of the initial outline are selected, the closed area defined by the sequential connection lines of the selected light path intersection points completely covers the initial outline of the target touch point. And further, a plurality of closed areas can be formed by the plurality of intersection point combinations, and the intersection point combination forming the minimum closed area is selected.
And when the optical path which is scanned again is selected, the optical path which is not scanned for the first time can be selected.
A modified scanning module 230 configured to: and after the secondary scanning is finished, the light path is shielded by the target touch point to form a plurality of intersection points, and the outline of the target touch point is redefined according to a plurality of intersection point position parameters.
Specifically, when the outline of the target touch point is defined by the intersection point position parameters, a closed area defined by connecting lines in the intersection point sequence is determined as the outline of the target touch point.
And forming a plurality of intersection points by the light paths shielded by the target touch point in the rescanned light path.
When the outline of the target touch point is redefined according to the intersection point position parameters, the outline of the target touch point is redefined according to the intersection point position parameters which fall outside the initial outline in the intersection points. And further, a plurality of intersection points are formed by the light path shielded by the target touch point, a plurality of intersection point combinations are formed by the plurality of intersection points, the intersection points in each intersection point combination are sequentially connected to form a plurality of closed areas, and a plurality of intersection point position parameters in the intersection point combination forming the largest closed area are selected to redefine the outline of the target touch point.
In this embodiment, the technical solution for implementing any embodiment of the method for positioning a touch point profile for reducing a scanning light path on an infrared touch device according to the present invention is similar in implementation principle and technical effect, and is not described herein again.
The invention relates to an infrared touch device, which executes a light path in a scanning direction to scan touch points when the device identifies the touch points, wherein a closed area surrounded by sequential connecting lines of intersection points of blocked light paths is an initial contour.
On the other hand, the present embodiment further provides an infrared touch terminal device, as shown in fig. 21, which includes an MCU201, an emission scanning circuit 202, a reception scanning circuit 203, an infrared emission tube matrix 204, and an infrared reception tube matrix 205.
The emission scanning circuit 202 is connected with the MCU201, and is configured to drive the infrared emission tubes in the infrared emission tube matrix 204 to emit infrared rays under the control of the MCU 201; the receiving scanning circuit 203 is connected with the MCU201 and is configured to drive the infrared receiving tubes in the infrared receiving tube matrix 205 to receive infrared rays under the control of the MCU 201; the sampling circuit 206 is connected to the infrared receiving tube matrix 205 and the MCU201, and configured to sample infrared rays received in the infrared receiving tube matrix 205 at preset time intervals under the control of the MCU201, and send a sampling signal to the MCU201 to enable the MCU201 to determine whether a touch operation of a user is received, so as to control the television set accordingly when the touch operation of the user is received.
The transmitting and scanning circuit 202 and the infrared transmitting tube matrix 204 may be collectively referred to as an infrared touch transmitting circuit, and the receiving and scanning circuit 203 and the infrared receiving tube matrix 205 may be collectively referred to as an infrared touch receiving circuit.
It should be noted that fig. 20 shows only one possible manner of the terminal device control system, and in another possible implementation manner, the MCU201 and the main processor 207 may be integrated into a processor as a control component of the terminal device, and the transmitting scanning circuit 202 and the receiving scanning circuit 203 are connected to the control component.
The processor executes the method for reducing the touch point outline positioning of the scanning light path on the infrared touch device. Specifically, the program code of the method may be executed by the MCU201, or the MCU201 may also send the received data to the main processor 207 for execution, and for other possible implementations, this is not listed.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The foregoing is merely a detailed description of the invention, and it should be noted that modifications and adaptations by those skilled in the art may be made without departing from the principles of the invention, and should be considered as within the scope of the invention.
Claims (10)
1. A touch point outline positioning method for reducing scanning light paths on infrared touch equipment is characterized by comprising the following steps:
in a scanning period, scanning a light path in a scanning direction, and defining an initial outline of a target touch point by using a parameter of a position of an intersection point of the light path which is shielded by the target touch point;
the optical path executing the scanning forms a virtual optical network, and the optical path passing through the intersection point of the optical path in the virtual optical network on the periphery of the initial contour is scanned again;
and after the secondary scanning is finished, the light path is shielded by the target touch point to form a plurality of intersection points, and the outline of the target touch point is redefined according to a plurality of intersection point position parameters.
2. The method according to claim 1, wherein the defining the contour of the target touch point with the intersection position parameter specifically comprises: and determining a closed area surrounded by the intersection sequence connecting lines as the outline of the target touch point.
3. The method according to claim 1, wherein selecting the intersection point of the optical paths in the virtual optical network on the periphery of the initial contour specifically comprises: and enabling the closed area defined by the sequential connecting lines of the intersection points of the selected light paths to completely cover the initial outline of the target touch point.
4. The method according to claim 3, wherein a plurality of the closed regions are formed by a plurality of combinations of intersection points, and a combination of intersection points forming a smallest of the closed regions is selected.
5. The method according to claim 1, wherein the blocking of the optical path by the target touch point forms a plurality of intersection points, specifically comprising: and forming a plurality of intersection points by a plurality of light paths blocked by the target touch point in the rescanned light path.
6. The method of claim 1, wherein the redefining the contour of the target touch point with the plurality of intersection location parameters comprises: and redefining the outline of the target touch point according to the intersection point position parameters falling outside the initial outline in the plurality of intersection points.
7. The method of claim 1, wherein selecting the rescanning optical path further comprises: light path without scanning.
8. The method according to any one of claims 1-7, wherein the redefining the contour of the target touch point with the plurality of intersection location parameters further comprises: and shielding the light path by the target touch point to form a plurality of intersection points, forming a plurality of intersection point combinations by the plurality of intersection points, sequentially connecting the intersection points in each intersection point combination to form a plurality of closed areas, and selecting a plurality of intersection point position parameters in the intersection point combination forming the largest closed area to redefine the outline of the target touch point.
9. A touch point outline positioning device for reducing scanning light paths on infrared touch equipment is characterized by comprising:
the initial scanning module is used for scanning a light path in a scanning direction in a scanning period, and defining an initial outline of a target touch point by using a parameter of a position of an intersection point of the light path which is shielded by the target touch point;
a scanning light path obtaining module, configured to form a virtual optical network by using a light path for performing scanning, and scan a light path passing through a light path intersection point in the virtual optical network on the periphery of the initial profile;
and the correction scanning module is used for forming a plurality of intersection points by shielding the light path by the target touch point after the secondary scanning is finished, and redefining the outline of the target touch point according to a plurality of intersection point position parameters.
10. An infrared touch terminal device, comprising a processor, a transmission scanning circuit, a reception scanning circuit, an infrared transmission tube matrix, and an infrared reception tube matrix, the processor being configured to execute the program code of the method of claims 1-8.
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| US9019237B2 (en) * | 2008-04-06 | 2015-04-28 | Lester F. Ludwig | Multitouch parameter and gesture user interface employing an LED-array tactile sensor that can also operate as a display |
| CN102147684B (en) * | 2010-11-30 | 2014-04-23 | 广东威创视讯科技股份有限公司 | Screen scanning method for touch screen and system thereof |
| CN103123555B (en) * | 2013-02-19 | 2016-12-28 | 创维光电科技(深圳)有限公司 | A kind of pattern recognition method based on infrared touch panel, device and infrared touch panel |
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