CN104391612A - Method and device for obtaining boundary of touch points - Google Patents
Method and device for obtaining boundary of touch points Download PDFInfo
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- CN104391612A CN104391612A CN201410669949.0A CN201410669949A CN104391612A CN 104391612 A CN104391612 A CN 104391612A CN 201410669949 A CN201410669949 A CN 201410669949A CN 104391612 A CN104391612 A CN 104391612A
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- 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
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Abstract
The invention provides a method for obtaining a boundary of touch points. The method for obtaining the boundary of the touch points includes the step of judging the position of the boundary of the touch points through three adjacent light reception modules, and in detail, judging the position of the boundary of the touch points according to a first voltage value, a second preset threshold value and a boundary area when the first voltage value of a first light reception module is larger than a first preset threshold value, a second voltage value of a second light reception module is less than the first preset threshold value, and a third voltage value of a third light reception module is less than the first preset threshold value. The first voltage value of the first light reception module is used as a reference parameter during the obtaining process of the boundary of the touch points, and therefore the method for obtaining the boundary of the touch points avoids the defect that the boundary of the touch points is still judged according to the second voltage value under the circumstance that the first voltage value is larger than the first preset threshold value and light rays of light beams between the first light reception module and a first light emission module are partly shielded by the touch points, and enables the boundary of the touch points, which is finally obtained, to approximate to the actual situation.
Description
Technical field
The present invention relates to technical field of touch control, particularly relate to a kind of acquisition methods and device of touch area.
Background technology
Optical touch control apparatus is usually used in obtaining touch control operation, infrared touch control component comprises the light emission component and optical fiber receive module that are oppositely arranged, when opening default light emission component and optical fiber receive module, a light path can be formed between light emission component and optical fiber receive module, the light whether optical fiber receive module receives light emission component and send is judged by detecting the magnitude of voltage of optical fiber receive module, and then judge whether this light path is blocked, thus can judge whether this light path exists touch point, the scanning of light contactor control device is multidirectional often, the position at the intersection point place of the light path be therefore blocked is exactly the position of touch point.
Linear extent due to touch point is often greater than the linear extent of light emission component and optical fiber receive module, so a more than light path is often blocked in touch point of the prior art simultaneously, namely touch point is not traditional " point ", but a touch area, that is, touch point can shelter from many light paths simultaneously.In prior art, the judgement on border, touch area is obtained by " two-value method ", concretely, in prior art, can for choosing a magnitude of voltage as the first predetermined threshold value, in touch-control scanning process, if when magnitude of voltage is less than the first predetermined threshold value, judge that the light path residing for described optical fiber receive module is blocked, if when magnitude of voltage is greater than the first predetermined threshold value, judge that the light path residing for described optical fiber receive module is not blocked, wherein the scope of predetermined threshold value is 0 to 1.As shown in Figure 1, for touch point 1, situation about judging in prior art is as shown in table 1.
Table 1
| Light emission component | Optical fiber receive module | Respective optical path | The magnitude of voltage that optical fiber receive module goes out | Whether light path is blocked |
| f-2 | f′-2 | F-2 | Be greater than the first predetermined threshold value | No |
| f-1 | f′-1 | F-1 | Be less than the first predetermined threshold value | Be |
| f | f′ | F | Be less than the first predetermined threshold value | Be |
| f+1 | f′+1 | F+1 | Be less than the first predetermined threshold value | Be |
| f+2 | f′+1 | F+2 | Be greater than the first predetermined threshold value | No |
Judge in prior art that the method on the border of touch point is: when there is the light path be blocked continuously, to close on the position of position as the place, border of touch point of the light path that is blocked of the light path that is not blocked.
In light path obtained in Table 1, think in prior art that light path F-1, light path F, light path F+1 are blocked, light path F-2, light path F+2 are for being blocked, therefore, the position at light path F-1, light path F+1 place is the position at place, border, touch point, that is, as shown in Figure 2, the border of the touch point 1 finally got is F '-1, F '+1.
Inventor finds, in infrared contactor control device, light path is not a light, but a light beam, therefore when the magnitude of voltage of optical fiber receive module is greater than the first predetermined threshold value, light beam between light emission component and optical fiber receive module may non-touched point block, also may the light beam that blocks of touch point smaller, if the light beam between optical fiber receive module f '-2 and light emission component f-2 has been blocked sub-fraction by actual touch point 1, when the magnitude of voltage that now optical fiber receive module f '-2 generates still is greater than predetermined threshold value, the marginal position of actual touch point 1 has exceeded the position at light path F-1 place in the row direction, namely, the physical location at the border of the touch point that scheme of the prior art obtains and the edge of touch point has larger difference.
Summary of the invention
The acquisition methods providing border, a kind of touch point of the present invention, while not changing hardware configuration, reduce and be greater than the first predetermined threshold value at the first magnitude of voltage, and the light beam touched point between the first optical fiber receive module and the first light emission component is when having blocked some light, the physical location at the border of the touch point that scheme of the prior art obtains and the edge of touch point has had the problem of larger difference.
The invention provides the acquisition methods on border, a kind of touch point, be applied to infrared contactor control device, described infrared contactor control device comprises the first optical fiber receive module, second optical fiber receive module adjacent with the first optical fiber receive module, three optical fiber receive module, first light emission component, second light emission component, three light emission component adjacent with the second optical fiber receive module, described in gating, the first light-receiving penetrates assembly, and during gating described first light emission component corresponding with described first optical fiber receive module, described first optical fiber receive module generates the first magnitude of voltage, described in gating, the second light-receiving penetrates assembly, and during gating described second light emission component corresponding with described second optical fiber receive module, described second optical fiber receive module generates the second magnitude of voltage, described in gating, the 3rd light-receiving penetrates assembly, and during gating described three light emission component corresponding with described 3rd optical fiber receive module, described 3rd optical fiber receive module generates third voltage value, described method comprises: when described first magnitude of voltage is greater than the first predetermined threshold value, and described second magnitude of voltage and described third voltage value are when being less than described first predetermined threshold value, the first ratio is generated according to described first magnitude of voltage and the second predetermined threshold value, wherein, described first ratio is used for characterizing, ratio shared by the light beam be blocked in light beam between described first light emission component and described first optical fiber receive module, described second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates, the border of touch point is generated according to described first ratio and borderline region, wherein, the apex coordinate of described borderline region is respectively the coordinate of described first optical fiber receive module, the coordinate of described second optical fiber receive module, the coordinate of described first light emission component, the coordinate of described second light emission component.
Optionally, the described step generating the border of touch point according to described first ratio and borderline region is specially: according to the coordinate of the first optical fiber receive module, the coordinate of the second optical fiber receive module, generate the first distance, described first distance is for characterizing the distance between described first optical module and described second optical module; According to the coordinate of the first light emission component, the coordinate of the second light emission component, generate second distance, described second distance is for characterizing the distance between described first light emission component and described second light emission component; According to long-pending generation first translation distance of described first ratio and described first distance; According to long-pending generation second translation distance of described first ratio and described second distance; According to Coordinate generation first reference point of described first translation distance and described second optical fiber receive module, according to Coordinate generation second reference point of described second translation distance and described second light emission component, wherein, described first reference point is between described first optical fiber receive module and described second optical fiber receive module, and described second reference point is between described first light emission component and described second light emission component; The border of touch point is generated according to described first reference point and described second reference point.
Optionally, the described step generating the border of touch point according to described first ratio and borderline region is specially: according to the coordinate of the first optical fiber receive module and Coordinate generation first line segment of the first light emission component; According to the coordinate of the second optical fiber receive module and Coordinate generation second line segment of the second light emission component; Generate the first line segment and three distance of the second line segment in preset coordinate system; Long-pending acquisition the 3rd translation distance of the first ratio according to described 3rd Distance geometry; Generate the border of touch point according to described 3rd translation distance and described second line segment, wherein, the border of described touch point is between described second line segment and described first line segment.
Further, described choose the step of the first magnitude of voltage of the first optical fiber receive module before also comprise: by preset rules, trigger the optical fiber receive module of light emission component and correspondence thereof successively; Store the magnitude of voltage that optical fiber receive module place generates.
Optionally, describedly be greater than the first predetermined threshold value when described first magnitude of voltage, and described second magnitude of voltage and described third voltage value are when being less than the first predetermined threshold value, more described first magnitude of voltage and the second predetermined threshold value the step generating the first ratio are specially: when described first magnitude of voltage is greater than the first predetermined threshold value, and described second magnitude of voltage and described third voltage value are when being less than the first predetermined threshold value, the difference according to described first ratio and the second predetermined threshold value generates the first difference; Ratio according to the first difference and described second predetermined threshold value generates the first ratio;
Optionally, describedly be greater than the first predetermined threshold value when described first magnitude of voltage, and described second magnitude of voltage and described third voltage value are when being less than the first predetermined threshold value, more described first magnitude of voltage and the second predetermined threshold value the step generating the first ratio are specially: when described first magnitude of voltage is greater than the first predetermined threshold value, and described second magnitude of voltage and described third voltage value are when being less than the first predetermined threshold value, the ratio according to described first magnitude of voltage and described second predetermined threshold value generates the second ratio; Difference according to described second ratio and 1 generates the first ratio.
Present invention also offers a kind of acquisition methods of touch point, utilize said method to obtain the border of touch point.
Present invention also offers a kind of infrared contactor control device, comprise infrared touch frame, described infrared touch frame is provided with the first optical fiber receive module, second optical fiber receive module adjacent with the first optical fiber receive module, three optical fiber receive module adjacent with the second optical fiber receive module, first light emission component corresponding with described first optical fiber receive module, second light emission component corresponding with described second optical fiber receive module, three light emission component corresponding with described 3rd optical fiber receive module, also comprise: comparison module, for choosing the first magnitude of voltage, second magnitude of voltage, third voltage value, when described first magnitude of voltage is greater than the first predetermined threshold value, and described second magnitude of voltage and described third voltage value are when being less than described first predetermined threshold value, more described first magnitude of voltage and the second predetermined threshold value also generate the first ratio, wherein, described second predetermined threshold value is that light that the first light emission component sends is not when being blocked, the magnitude of voltage that first optical fiber receive module generates, described first ratio is in the light beam between described first light emission component and described first optical fiber receive module, the ratio shared by the light beam be blocked, border generation module, for receiving the first ratio that described comparison module generates, and the border of touch point is generated according to described first ratio and borderline region, wherein, the summit of described borderline region is respectively the coordinate of described first optical fiber receive module, the coordinate of described second optical fiber receive module, the coordinate of described first light emission component, the coordinate of described second light emission component.
Further, infrared contactor control device also comprises: touch point generation module, for receiving the border of the touch point that described border acquisition module generates, and according to the generation touch point, border of described touch point.
Present invention also offers a kind of electronic equipment, comprise display screen, also comprise above-mentioned infrared contactor control device.
The invention provides the acquisition methods on border, a kind of touch point, the position judging place, border, touch point is gone to by the magnitude of voltage of three adjacent optical fiber receive modules, the first predetermined threshold value is greater than at the first magnitude of voltage of the first optical fiber receive module, and the second magnitude of voltage of the second optical fiber receive module is less than the first predetermined threshold value, when the third voltage value of the 3rd optical fiber receive module is less than the first predetermined threshold value, the position at the place, border judging touch point is gone to according to the first magnitude of voltage and borderline region, wherein, the apex coordinate of borderline region is respectively the coordinate of described first optical fiber receive module, the coordinate of described second optical fiber receive module, the coordinate of described first light emission component, the coordinate of described second light emission component.First according to the first magnitude of voltage and the second predetermined threshold value, generate the first ratio, first ratio is for characterizing the ratio shared by the light beam that is blocked in the light beam between the first light emission component and the first optical fiber receive module, second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates.Further, according to described first ratio, the borderline region 201 shown in Fig. 5 is split, generate the border of touch point as shown in Figure 3, compared to the border using the line between the second light emission component and the second optical fiber receive module as touch point of the prior art, in this programme, by judging that the degree that is blocked of described first optical fiber receive module is split borderline region 201, and then obtain the border of touch point, make the position on the border of the final touch point obtained compared with the scheme of prior art, there is certain skew in the direction towards the line of the first light emission component and the second light emission component, avoid and be greater than the first predetermined threshold value at the first magnitude of voltage, and the light beam touched point between the first optical fiber receive module and the first light emission component is when having blocked some light, the defect on border, touch point is still judged according to the second magnitude of voltage, the border of touch point makes more close to edge, touch point 1 actual conditions.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the light path schematic diagram in infrared contactor control device.
The schematic diagram on the border of the touch point that Fig. 2 obtains for technical scheme of the prior art.
The schematic diagram on the border of the touch point that Fig. 3 obtains for technical scheme of the present invention.
Fig. 4 is the method flow diagram in embodiment one.
Fig. 5 is the schematic diagram of borderline region in embodiment one.
Fig. 6 is the method flow diagram in embodiment two.
The schematic diagram on the border of touch point of Fig. 7 for obtaining in embodiment two.
Fig. 8 is the method flow diagram of embodiment three kinds.
The schematic diagram on the border of touch point of Fig. 9 for obtaining in embodiment three.
Figure 10 is the structured flowchart of the infrared contactor control device in embodiment four.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
For convenience of description, only with f-2, f-1, the f in light emission component in the description of one embodiment, f '-2 in optical fiber receive module, f '-1, f ' are example, for being described technical scheme of the present invention and explaining, in specific implementation process, other light emission component is similar with embodiments of the invention with the operation performed by optical fiber receive module, is not repeated at this.
Embodiment one
The invention provides a kind of acquisition methods of touch point, be applied to infrared contactor control device 100 as shown in Figure 1, infrared contactor control device 100 comprises the first optical fiber receive module f '-2, the second optical fiber receive module f '-1 adjacent with the first optical fiber receive module f '-2, the three optical fiber receive module f ' adjacent with the second optical fiber receive module f '-1; By preset rules, gating first light-receiving penetrates assembly f '-2, and during the gating first light emission component f-2 corresponding with the first optical fiber receive module f '-2, the first optical fiber receive module f '-2 generates the first magnitude of voltage; Gating second light-receiving penetrates assembly f '-1, and during the gating second light emission component f-1 corresponding with the second optical fiber receive module f '-1, the second optical fiber receive module f '-1 generates the second magnitude of voltage; Gating the 3rd light-receiving penetrates assembly f ', and during the gating three light emission component f corresponding with the 3rd optical fiber receive module f ', the 3rd optical fiber receive module f ' generation third voltage value.
Particularly, in the present embodiment, known in conjunction with Figure 10, infrared contactor control device 100 comprises infrared touch frame 1001, comparison module 1002, border generation module 1003, touch point generation module 1004, the peripheral position of infrared touch frame 1001 is provided with light emission component and optical fiber receive module, light emission component is separately positioned on light and launches on long limit and light transmitting minor face, optical fiber receive module is separately positioned on the long limit of light-receiving and light-receiving minor face, light launches long limit and the long limit of light-receiving is oppositely arranged, and light launches minor face and light-receiving minor face is oppositely arranged.Infrared contactor control device 100 is only a hardware foundation of technical scheme provided by the invention, and the setting of its light emission component and optical fiber receive module, arrangement and corresponding relation should as the restrictions to technical solution of the present invention.With actual touch region 1 in the present embodiment, f-2, f-1, f in light emission component, the f '-2 in optical fiber receive module, f '-1, f ' are example.
As shown in Figure 4, the acquisition methods on the border, touch point be applied on infrared contactor control device 100 comprises:
S101: when described first magnitude of voltage is greater than the first predetermined threshold value, and described second magnitude of voltage and described third voltage value are when being less than described first predetermined threshold value, the first ratio is generated according to described first magnitude of voltage and the second predetermined threshold value, wherein, described first ratio is used for characterizing, the ratio shared by the light beam be blocked in the light beam between described first light emission component and described first optical fiber receive module; Described second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates;
Particularly, composition graphs 1 is known, the first magnitude of voltage generated when the first optical fiber receive module f '-2 place is greater than predetermined threshold value, and the second magnitude of voltage that the second optical fiber receive module f '-1 place generates is less than predetermined threshold value, when the third voltage value that the 3rd optical fiber receive module f ' place generates is less than predetermined threshold value; Light path F-1, light path F are blocked, light path F-2 may not be blocked completely, also be likely that the degree be blocked does not reach default standard, therefore, the first magnitude of voltage generated according to the first optical fiber receive module f '-2 place and the second predetermined threshold value, go the ratio shared by light beam be blocked in the light beam between judgement first light emission component and the first optical fiber receive module, wherein, second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates.In practical operation, second predetermined threshold value be one group of corresponding light emission component and optical fiber receive module at the same time conducting time the optical fiber receive module place magnitude of voltage that generates, can be drawn by experiment in advance, also can according to record respectively one group of corresponding light emission component and optical fiber receive module at the same time conducting time the optical fiber receive module place magnitude of voltage that generates, and make statistical form to inquire about.
S102: the border generating touch point according to described first ratio and borderline region, wherein, the apex coordinate of described borderline region is respectively the coordinate of described first optical fiber receive module, the coordinate of described second optical fiber receive module, the coordinate of described first light emission component, the coordinate of described second light emission component.
Particularly, composition graphs 5 is known, knowing in the light beam between the first light emission component f-2 and the first optical fiber receive module f '-2, ratio shared by the light beam be blocked, namely, after first ratio, borderline region 201 is split, the position at cut-off rule place is the position at place, border, touch point, wherein, the apex coordinate of borderline region 201 be respectively the coordinate of the first optical fiber receive module f '-2, the coordinate of the second optical fiber receive module f '-1, the coordinate of the first light emission component f-2, the second light emission component f ?1 coordinate.
Further, also comprised before S101 step:
By preset rules, trigger the optical fiber receive module of light emission component and correspondence thereof; Store the magnitude of voltage that optical fiber receive module place generates.
Concretely, according to preset rules, trigger the optical fiber receive module of light emission component and correspondence thereof, namely travel through light emission component and the optical fiber receive module of infrared contactor control device 100, so that in optical fiber receive module place formation voltage value, store the magnitude of voltage that optical fiber receive module place generates.So that next step chooses the first magnitude of voltage, the second magnitude of voltage, third voltage value from the magnitude of voltage stored.
The position judging place, border, touch point is gone to by the magnitude of voltage of three adjacent optical fiber receive modules, the first predetermined threshold value is greater than at the first magnitude of voltage of the first optical fiber receive module, and the second magnitude of voltage of the second optical fiber receive module is less than the first predetermined threshold value, when the third voltage value of the 3rd optical fiber receive module is less than the first predetermined threshold value, the position at the place, border judging touch point is gone to according to the first magnitude of voltage and borderline region, wherein, the apex coordinate of borderline region is respectively the coordinate of described first optical fiber receive module, the coordinate of described second optical fiber receive module, the coordinate of described first light emission component, the coordinate of described second light emission component.First according to the first magnitude of voltage and the second predetermined threshold value, generate the first ratio, first ratio is for characterizing the ratio shared by the light beam that is blocked in the light beam between the first light emission component and the first optical fiber receive module, second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates.Further, according to described first ratio, the borderline region 201 shown in Fig. 5 is split, generate the border of touch point as shown in Figure 3, compared to the border using the line between the second light emission component and the second optical fiber receive module as touch point of the prior art, in this programme, by judging that the degree that is blocked of described first optical fiber receive module is split borderline region 201, and then obtain the border of touch point, make the position on the border of the final touch point obtained compared with the scheme of prior art, there is certain skew in the direction towards the line of the first light emission component and the second light emission component, avoid and be greater than the first predetermined threshold value at the first magnitude of voltage, and the light beam touched point between the first optical fiber receive module and the first light emission component is when having blocked some light, the defect on border, touch point is still judged according to the second magnitude of voltage, the border of touch point makes more close to edge, touch point 1 actual conditions.
Embodiment two
Contactor control device as infrared in Fig. 1, be applied to infrared contactor control device, infrared contactor control device comprises the first optical fiber receive module f '-2, the second optical fiber receive module f '-1 adjacent with the first optical fiber receive module f '-2, the three optical fiber receive module f ' adjacent with the second optical fiber receive module f '-1; By preset rules, gating first light-receiving penetrates assembly f '-2, and during the gating first light emission component f-2 corresponding with the first optical fiber receive module f '-2, the first optical fiber receive module f '-2 generates the first magnitude of voltage; Gating second light-receiving penetrates assembly f '-1, and during the gating second light emission component f-1 corresponding with the second optical fiber receive module f '-1, the second optical fiber receive module f '-1 generates the second magnitude of voltage; Gating the 3rd light-receiving penetrates assembly f ', and during the gating three light emission component f corresponding with the 3rd optical fiber receive module f ', 3rd optical fiber receive module f ' generation third voltage value, for ease of explanation, for axial scan in the present embodiment, the optical fiber receive module gating at the same time of light emission component and its axis.The method on the border, acquisition touch point in the present embodiment as shown in Figure 6, comprising:
S201: when the first magnitude of voltage is greater than the first predetermined threshold value, and when the second magnitude of voltage and third voltage value are less than the first predetermined threshold value, the difference according to the first magnitude of voltage and the second predetermined threshold value generates the first difference; Wherein, the first difference for being characterized in the light beam between the first light emission component and the first optical fiber receive module, the magnitude of voltage that the light beam be blocked can produce; Second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates.
Concretely, composition graphs 1 is known, due in infrared contactor control device 100, the first magnitude of voltage generated when the first optical fiber receive module f '-2 place is greater than predetermined threshold value, the second magnitude of voltage that second optical fiber receive module f '-1 place generates is less than predetermined threshold value, when the third voltage value that the 3rd optical fiber receive module f ' place generates is less than predetermined threshold value; Light path F-1, light path F are blocked, light path F-2 may not be blocked completely, also be likely that the degree be blocked does not reach default standard, therefore we need in the light beam between acquisition first light emission component and the first optical fiber receive module, the ratio shared by the light beam be blocked.First magnitude of voltage is the magnitude of voltage that the first optical fiber receive module f '-2 place generates, and therefore, the difference of the first magnitude of voltage and the second predetermined threshold value, is the magnitude of voltage that the segment beam be blocked between the first optical fiber receive module and the first light emission component can produce.
Particularly, take predetermined threshold value as 0.5V, the second predetermined threshold value is 1V is example, as shown in table 2,
Table 2
| Light emission component is numbered | Optical fiber receive module is numbered | The magnitude of voltage that optical fiber receive module goes out | First difference | First ratio |
| f-2 | f′-2 | 0.677V | 0.333V | 0.33 |
| f-1 | f′-1 | 0V | -- | -- |
| f | f′ | 0V | -- | -- |
The first magnitude of voltage 0.667V of the first optical fiber receive module f-2 is greater than the first predetermined threshold value 0.5V, the second magnitude of voltage 0V of the second optical fiber receive module f-1 is less than the first predetermined threshold value 0.5V, the third voltage value 0V of the 3rd optical fiber receive module f is less than the first predetermined threshold value 0.5V, although the first magnitude of voltage 0.667V of the first light emission component f-2 is greater than the first predetermined threshold value 0.5V, but the light beam now between the first light emission component f-2 and the first optical fiber receive module f '-2 has been blocked 33.3%, therefore first difference of the first magnitude of voltage 0.667V and the second preset voltage value 1V is 0.333V, the light beam being equivalent to be blocked 33.3% can produce the magnitude of voltage of 0.333V.
S202: the ratio according to the first difference and the second predetermined threshold value generates the first ratio, wherein, the first ratio for being characterized in the light beam between the first light emission component and the first optical fiber receive module, the ratio shared by the light beam be blocked.
Concretely, as shown in table 2, in the present embodiment, first ratio of the first difference 0.333V and the second predetermined threshold value 1V is 0.333, this first ratio is equivalent to, ratio shared in the light beam of be blocked 33.3% light beam between the first light emission component f-2 and the first optical fiber receive module f '-2.
S203: according to the coordinate of the first optical fiber receive module, the coordinate of the second optical fiber receive module, generate the first distance, described first distance is for characterizing the distance between described first optical module and described second optical module; According to the coordinate of the first light emission component, the coordinate of the second light emission component, generate second distance, described second distance is for characterizing the distance between described first light emission component and described second light emission component.
Concretely, composition graphs 7 is known, and in infrared contactor control device, all light emission components and optical fiber receive module all have corresponding coordinate in preset coordinate system.First according to the coordinate of the first optical fiber receive module f '-2, the coordinate of the second optical fiber receive module f '-1, the first distance 401 between the first receive optical assembly f '-2 and the second receive optical assembly f '-1 is obtained; And according to the coordinate f-2 of the first light emission component, the coordinate of the second light emission component f-1, obtain the second distance 402 between the first light emission component f-2 and the second light emission component f-1.The acquisition of the first distance 401 and second distance 402 does not have dividing of priority in order, and therefore above-mentioned embodiment is only for ease of illustrating the solution of the present invention, can not as the restriction to the present invention program.
S204: according to long-pending generation first translation distance of the first ratio and the first distance; According to long-pending generation second translation distance of the first ratio and second distance.
Concretely, the first translation distance 301 and the second translation distance 302 is the parameters of adjustment determined according to the first magnitude of voltage and the first distance 401 and second distance 402.First distance 401 and the first amassing of ratio 0.333 are the first translation distance 301, and second distance 402 and amassing of the first ratio 0.333 are the second translation distance 302.
S205: according to Coordinate generation first reference point of the first translation distance and the second optical fiber receive module, according to Coordinate generation second reference point of the second translation distance and the second light emission component, wherein, first reference point is between the first optical fiber receive module and the second optical fiber receive module, and the second reference point is between the first light emission component and the second light emission component.
Concretely, the coordinate of the second optical fiber receive module f '-1 and the coordinate of the second light emission component f-1 are the bases of adjustment, first reference point A, between the first optical fiber receive module f '-2 and the second optical fiber receive module f '-1, is the first translation distance 301 with the distance of the second optical fiber receive module f '-1; Second reference point B, between the first light emission component f-2 and the second light emission component f-1, is the second translation distance 302 with the distance of the second light emission component f-1.
S206: the border generating touch point according to the first reference point and the second reference point.
Particularly, between the first reference point A and the second reference point B, line is the border 102 of touch point.
In these cases, the border of the touch point of prior art judgement is the line between the second light emission component f-1 and the second optical fiber receive module f '-1.But judge in prior art that the border 102 of now generated touch point is compared with the F '-1 in the scheme of prior art, more towards the line of the first light emission component and the second light emission component, avoid and be greater than the first predetermined threshold value at the first magnitude of voltage, and the light beam touched point between the first optical fiber receive module and the first light emission component is when having blocked some light, still judge the defect on border, touch point according to the second magnitude of voltage, the border of touch point makes more close to actual conditions.
Further, according to the generation touch point, border of the touch point obtained with column direction in the row direction.Identical with prior art according to the method for the generation touch point, border of touch point.
Further, also comprised before S201 step:
By preset rules, trigger the optical fiber receive module of light emission component and correspondence thereof successively; Store the magnitude of voltage that optical fiber receive module place generates.
Embodiment three
Contactor control device as infrared in Fig. 1, be applied to infrared contactor control device, infrared contactor control device comprises the first optical fiber receive module f '-2, the second optical fiber receive module f '-1 adjacent with the first optical fiber receive module f '-2, the three optical fiber receive module f ' adjacent with the second optical fiber receive module f '-1; By preset rules, gating first light-receiving penetrates assembly f '-2, and during the gating first light emission component f-2 corresponding with the first optical fiber receive module f '-2, the first optical fiber receive module f '-2 generates the first magnitude of voltage; Gating second light-receiving penetrates assembly f '-1, and during the gating second light emission component f-1 corresponding with the second optical fiber receive module f '-1, the second optical fiber receive module f '-1 generates the second magnitude of voltage; Gating the 3rd light-receiving penetrates assembly f ', and during the gating three light emission component f corresponding with the 3rd optical fiber receive module f ', 3rd optical fiber receive module f ' generation third voltage value, for ease of explanation, for axial scan in the present embodiment, the optical fiber receive module gating at the same time of light emission component and its axis.Method such as the Fig. 8 on the border, acquisition touch point in the present embodiment comprises:
S301: when the first magnitude of voltage is greater than the first predetermined threshold value, and when the second magnitude of voltage and third voltage value are less than the first predetermined threshold value, the ratio according to the first magnitude of voltage and the second predetermined threshold value generates the second ratio; Wherein, the second ratio for being characterized in the light beam between the first light emission component and the first optical fiber receive module, the accounting of the light beam be not blocked.
Concretely, composition graphs 1 is known, due in infrared contactor control device 100, the first magnitude of voltage generated when the first optical fiber receive module f '-2 place is greater than predetermined threshold value, the second magnitude of voltage that second optical fiber receive module f '-1 place generates is less than predetermined threshold value, when the third voltage value that the 3rd optical fiber receive module f ' place generates is less than predetermined threshold value; Light path F-1, light path F are blocked, light path F-2 may not be blocked completely, also be likely that the degree be blocked does not reach default standard, therefore we need in the light beam between acquisition first light emission component and the first optical fiber receive module, the ratio shared by the light beam be blocked.First magnitude of voltage is the magnitude of voltage that the first optical fiber receive module f '-2 place generates, and therefore the ratio of the first magnitude of voltage and the second predetermined threshold value is in the light beam between the first light emission component and the first optical fiber receive module, the accounting of the light beam be not blocked.
Particularly, take predetermined threshold value as 0.5V, the second predetermined threshold value is 1V is example, as shown in table 3,
Table 3
| Light emission component is numbered | Optical fiber receive module is numbered | The magnitude of voltage that optical fiber receive module goes out | Second ratio | First ratio |
| f-2 | f′-2 | 0.677V | 0.667 | 0.33 |
| f-1 | f′-1 | 0V | -- | -- |
| f | f′ | 0V | -- | -- |
The first magnitude of voltage 0.667V of the first optical fiber receive module f-2 is greater than the first predetermined threshold value 0.5V, the second magnitude of voltage 0V of the second optical fiber receive module f-1 is less than the first predetermined threshold value 0.5V, the third voltage value 0V of the 3rd optical fiber receive module f is less than the first predetermined threshold value 0.5V, although the first magnitude of voltage 0.667V of the first light emission component f-2 is greater than the first predetermined threshold value 0.5V, but second ratio of the first magnitude of voltage 0.667V and the second preset voltage value 1V is 0.667, be equivalent to the light beam be not blocked, occupy 66.7% of the light beam of the first light emission component and the first optical fiber receive module.
S302: the difference according to the second ratio and 1 generates the first ratio, wherein, the first ratio for being characterized in the light beam between the first light emission component and the first optical fiber receive module, the ratio shared by the light beam be blocked.
Concretely, as shown in table 3, the first ratio is 0.333, is equivalent in the light beam between the first light emission component and the first optical fiber receive module, and the ratio shared by the light beam be blocked is 33.3%.
S303: according to the coordinate of the first optical fiber receive module and Coordinate generation first line segment of the first light emission component; According to the coordinate of the second optical fiber receive module and Coordinate generation second line segment of the second light emission component.
Concretely, composition graphs 9 is known, and in infrared contactor control device, all light emission components and optical fiber receive module all have corresponding coordinate in preset coordinate system.First according to the coordinate of the first optical fiber receive module f '-2 and Coordinate generation first line segment 105 of the first light emission component f-2; According to the coordinate of the second optical fiber receive module f '-1 and the second light emission component f ?1 Coordinate generation second line segment 103.
S304: generate the first line segment and the second line segment in preset coordinate system the 3rd distance.
Concretely, in preset coordinate system, all corresponding line segment function of the first line segment 105 and the second line segment 103, can obtain accordingly the first line segment 105 and the second line segment 103 in preset coordinate system the 3rd apart from 403.
S305: according to long-pending acquisition the 3rd translation distance of the 3rd Distance geometry first ratio.
Concretely, the 3rd translation distance 303 is generated according to the product of the 3rd distance 403 and the first ratio 0.333.
S306: the border generating touch point according to the 3rd translation distance and the second line segment, wherein, the border of touch point is between the second line segment and the first line segment.
Concretely, the border 102 of touch point is between the first line segment 105 and the second line segment 103, and the border 102 of touch point and the distance of the second line segment 103 are the 3rd translation distance 303.
In these cases, the border F '-1 of the touch point that prior art judges is the line between the second light emission component and the second optical fiber receive module, is namely equivalent to the second line segment 103 in the present embodiment.But judge in prior art that the border 102 of now generated touch point is compared with the scheme of prior art, more towards the line of the first light emission component and the second light emission component, avoid and be greater than the first predetermined threshold value at the first magnitude of voltage, and the light beam touched point between the first optical fiber receive module and the first light emission component is when having blocked some light, still judge the defect on border, touch point according to the second magnitude of voltage, the border of touch point makes more close to actual conditions.
Further, according to the generation touch point, border of the touch point obtained with column direction in the row direction.Identical with prior art according to the method for the generation touch point, border of touch point.
Further, also comprised before S301 step:
By preset rules, trigger the optical fiber receive module of light emission component and correspondence thereof successively; Store the magnitude of voltage that optical fiber receive module place generates.
Embodiment four
As shown in Figure 10, present invention also offers a kind of infrared contactor control device 100, infrared contactor control device 100 comprises:
Infrared touch frame 1001, is provided with the first optical fiber receive module f '-2, the second optical fiber receive module f '-1 adjacent with the first optical fiber receive module f '-2, the three optical fiber receive module f ' adjacent with the second optical fiber receive module f '-1 in infrared touch frame 1001; With the first light emission component f-2 of gating while of the first optical fiber receive module f '-2; The second light emission component f-1 of assembly f '-1 simultaneously gating is penetrated with the second light-receiving; With the 3rd light-receiving penetrate assembly f ' while gating the 3rd light emission component f, during gating first optical fiber receive module f '-2 and the first light emission component f-2, first optical fiber receive module f '-2 generates the first magnitude of voltage, during gating second optical fiber receive module f '-1 and the second light emission component f-1, second optical fiber receive module f '-1 generates the second magnitude of voltage, during gating the 3rd optical fiber receive module f ' and the 3rd light emission component f, the 3rd optical fiber receive module f ' generation third voltage value; Also comprise:
Comparison module 1002, for choosing the first magnitude of voltage, the second magnitude of voltage, third voltage value; When the first magnitude of voltage is greater than the first predetermined threshold value, and the second magnitude of voltage and third voltage value are when being less than the first predetermined threshold value, relatively the first magnitude of voltage and the second predetermined threshold value generate the first ratio, wherein, second predetermined threshold value is: when the light that the first light emission component sends is not blocked, the magnitude of voltage that the first optical fiber receive module generates; First ratio is: in the light beam between the first light emission component and the first optical fiber receive module, the ratio shared by the light beam be blocked;
Border generation module 1003, for receiving the first ratio that comparison module generates, and the border of touch point is generated according to the first ratio and borderline region, wherein, the summit of borderline region is respectively coordinate, the coordinate of the second optical fiber receive module, the coordinate of the first light emission component, the coordinate of the second light emission component of the first optical fiber receive module.
Further, can also comprise: touch point generation module 1004, for receiving the border of the touch point that border acquisition module generates, and according to the generation touch point, border of touch point.
Present invention also offers a kind of electronic equipment, comprise display screen, also comprise above-mentioned infrared contactor control device 100.
Those skilled in the art are known, the sweeping scheme obtaining accurate touch area has the possibility of multiple realization, the scheme of the employing axial scan listed by the present embodiment is only one possibility wherein, other sweeping scheme can be the sweeping scheme of one-to-many, also can be the scheme of first axial scan oblique scanning again, in any case carry out the scanning of accurate touch area, as long as by obtaining the magnitude of voltage of continuous three optical module places generation or other parameters corresponding with magnitude of voltage in employing this programme, and then generate corresponding zone boundary, the protection domain of the present invention program is all belonged to the technical scheme obtaining touch area accurately.
Above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. the acquisition methods on border, a touch point, be applied to infrared contactor control device, described infrared contactor control device comprises the first optical fiber receive module, second optical fiber receive module adjacent with the first optical fiber receive module, three optical fiber receive module, first light emission component, second light emission component, three light emission component adjacent with the second optical fiber receive module; Described in gating, the first light-receiving penetrates assembly, and during gating described first light emission component corresponding with described first optical fiber receive module, described first optical fiber receive module generates the first magnitude of voltage; Described in gating, the second light-receiving penetrates assembly, and during gating described second light emission component corresponding with described second optical fiber receive module, described second optical fiber receive module generates the second magnitude of voltage; Described in gating, the 3rd light-receiving penetrates assembly, and during gating described three light emission component corresponding with described 3rd optical fiber receive module, described 3rd optical fiber receive module generates third voltage value, and it is characterized in that, described method comprises:
When described first magnitude of voltage is greater than the first predetermined threshold value, and described second magnitude of voltage and described third voltage value are when being less than described first predetermined threshold value, the first ratio is generated according to described first magnitude of voltage and the second predetermined threshold value, wherein, described first ratio is used for characterizing, the ratio shared by the light beam be blocked in the light beam between described first light emission component and described first optical fiber receive module; Described second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates;
The border of touch point is generated according to described first ratio and borderline region, wherein, the apex coordinate of described borderline region is respectively the coordinate of described first optical fiber receive module, the coordinate of described second optical fiber receive module, the coordinate of described first light emission component, the coordinate of described second light emission component.
2. method as claimed in claim 1, is characterized in that,
The described step generating the border of touch point according to described first ratio and borderline region is specially:
According to the coordinate of the first optical fiber receive module, the coordinate of the second optical fiber receive module, generate the first distance, described first distance is for characterizing the distance between described first optical module and described second optical module; According to the coordinate of the first light emission component, the coordinate of the second light emission component, generate second distance, described second distance is for characterizing the distance between described first light emission component and described second light emission component;
According to long-pending generation first translation distance of described first ratio and described first distance; According to long-pending generation second translation distance of described first ratio and described second distance;
According to Coordinate generation first reference point of described first translation distance and described second optical fiber receive module, according to Coordinate generation second reference point of described second translation distance and described second light emission component, wherein, described first reference point is between described first optical fiber receive module and described second optical fiber receive module, and described second reference point is between described first light emission component and described second light emission component;
The border of touch point is generated according to described first reference point and described second reference point.
3. method as claimed in claim 1, is characterized in that,
The described step generating the border of touch point according to described first ratio and borderline region is specially:
According to the coordinate of the first optical fiber receive module and Coordinate generation first line segment of the first light emission component; According to the coordinate of the second optical fiber receive module and Coordinate generation second line segment of the second light emission component;
Generate the first line segment and three distance of the second line segment in preset coordinate system;
Long-pending acquisition the 3rd translation distance of the first ratio according to described 3rd Distance geometry;
Generate the border of touch point according to described 3rd translation distance and described second line segment, wherein, the border of described touch point is between described second line segment and described first line segment.
4. the method as described in claim 1-3 any one, is characterized in that,
Described choose the step of the first magnitude of voltage of the first optical fiber receive module before also comprise:
By preset rules, trigger the optical fiber receive module of light emission component and correspondence thereof successively;
Store the magnitude of voltage that optical fiber receive module place generates.
5. method as claimed in claim 4, is characterized in that,
Describedly be greater than the first predetermined threshold value when described first magnitude of voltage, and when described second magnitude of voltage and described third voltage value are less than the first predetermined threshold value, more described first magnitude of voltage and the second predetermined threshold value the step generating the first ratio are specially:
When described first magnitude of voltage is greater than the first predetermined threshold value, and when described second magnitude of voltage and described third voltage value are less than the first predetermined threshold value, the difference according to described first ratio and the second predetermined threshold value generates the first difference; Ratio according to the first difference and described second predetermined threshold value generates the first ratio.
6. method as claimed in claim 4, is characterized in that,
Describedly be greater than the first predetermined threshold value when described first magnitude of voltage, and when described second magnitude of voltage and described third voltage value are less than the first predetermined threshold value, more described first magnitude of voltage and the second predetermined threshold value the step generating the first ratio are specially:
When described first magnitude of voltage is greater than the first predetermined threshold value, and when described second magnitude of voltage and described third voltage value are less than the first predetermined threshold value, the ratio according to described first magnitude of voltage and described second predetermined threshold value generates the second ratio; Difference according to described second ratio and 1 generates the first ratio.
7. an acquisition methods for touch point, is characterized in that,
Method as described in claim 1-6 any one is utilized to obtain the border of touch point.
8. an infrared contactor control device, comprise infrared touch frame, described infrared touch frame is provided with the first optical fiber receive module, second optical fiber receive module adjacent with the first optical fiber receive module, three optical fiber receive module adjacent with the second optical fiber receive module, first light emission component corresponding with described first optical fiber receive module, second light emission component corresponding with described second optical fiber receive module, three light emission component corresponding with described 3rd optical fiber receive module, it is characterized in that
Also comprise:
Comparison module, for choosing the first magnitude of voltage, the second magnitude of voltage, third voltage value, when described first magnitude of voltage is greater than the first predetermined threshold value, and described second magnitude of voltage and described third voltage value are when being less than described first predetermined threshold value, more described first magnitude of voltage and the second predetermined threshold value also generate the first ratio, wherein, described second predetermined threshold value is light that the first light emission component sends when not being blocked, the magnitude of voltage that the first optical fiber receive module generates; Described first ratio is in the light beam between described first light emission component and described first optical fiber receive module, the ratio shared by the light beam be blocked;
Border generation module, for receiving the first ratio that described comparison module generates, and the border of touch point is generated according to described first ratio and borderline region, wherein, the summit of described borderline region is respectively the coordinate of described first optical fiber receive module, the coordinate of described second optical fiber receive module, the coordinate of described first light emission component, the coordinate of described second light emission component.
9. infrared contactor control device as claimed in claim 8, is characterized in that, also comprise:
Touch point generation module, for receiving the border of the touch point that described border acquisition module generates, and according to the generation touch point, border of described touch point.
10. an electronic equipment, comprises display screen, it is characterized in that,
Also comprise the infrared contactor control device as described in claim 8-9 any one.
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