CN103513827A - Infrared touch screen scan method and infrared touch screen - Google Patents
Infrared touch screen scan method and infrared touch screen Download PDFInfo
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- CN103513827A CN103513827A CN201210226494.6A CN201210226494A CN103513827A CN 103513827 A CN103513827 A CN 103513827A CN 201210226494 A CN201210226494 A CN 201210226494A CN 103513827 A CN103513827 A CN 103513827A
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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
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
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Abstract
The invention provides an infrared touch screen scan method and an infrared touch screen using the infrared touch screen scan method. The method comprises the steps that ambient light is received; the light intensity of the received ambient light is compared with preset light intensity, and when the light intensity of the received ambient light is smaller than the preset light intensity, the following step is executed, namely, strobing is conducted on infrared transmitting tubes and infrared receiving tubes one by one in a one-to-one scan mode; according to infrared beams received by the infrared receiving tubes, whether one or more touch objects exist in a touch detection area is judged; when one or more touch objects exist, strobing is conducted on the infrared transmitting tubes and the infrared receiving tubes one by one in a one-to-one scan mode, and area scan is conducted relative to the detected touch objects to determine the positions of the touch objects. By means of the infrared touch screen scan method and the infrared touch screen, accurate positioning is ensured, and light and energy interfering a night-vision device can be emitted as little as possible.
Description
Technical field
The present invention relates to a kind of infrared touch panel scan method, and use the infrared touch panel of the method.
Background technology
Infrared touch panel is because working stability, militarily adopted in a large number, the infrared touch panel using on military aircraft will meet GJB national military standard 1394-1992(GJB1394-1992: with the interior of aircraft illumination of Night Vision Imaging System compatibility) the II type Class B standard of regulation.Wherein, the essence of aircraft NVIS-compatible lighting technology refers to while wearing the tasks such as laser night-vision device execution navigation at night and scouting night flying person, the illuminator of aircraft can not sent light and the energy that disturbs laser night-vision device after night viewing compatible improves, make its normal performance night vision function, guarantee that pilot can complete combat duty.Aircraft NVIS-compatible lighting technology is the important guarantee that safety realizes night vision.
The II type Class B standard of stipulating according to GJB 1394-1992: under the measurement brightness of 0.5fL, 450～930nm radiation that touch-screen work causes is not higher than 2.2 * 10-9W/Srcm2.
Fig. 1 shows Class B night vision response criteria curve.Shown in Fig. 1, night vision device has significant response to 600nm to the light of wavelength between 900nm, that is to say, during plane night flight, the wavelength coverage that the night vision device that pilot uses can pass through mainly at 600nm between 900nm.
The wavelength coverage of the Infrared that general infrared touch panel is used is for 800nm is to 1040nm, this wavelength coverage with according to the night vision device of the II type Class B standard of GJB 1394-1992 regulation the wavelength coverage 600nm that can pass through to 900nm, some is overlapping, that is to say, the Infrared that the infrared transmitting tube of infrared touch panel sends may cause interference to night vision device.
Fig. 2 shows the spectrogram of Taiwan hundred million photoelectronic IR26-51C type infrared transmitting tube.As shown in Figure 2, the wavelength coverage of the Infrared of this infrared transmitting tube transmitting be 880nm to 1040nm, as mentioned above, the Infrared of this wavelength coverage may cause interference to night vision device, affects the normal performance of its night vision function.
In prior art, in order to solve night vision problem, conventionally adopt wavelength to surpass the infrared transmitting tube that 900nm even surpasses 1040nm, avoid the wavelength coverage that the night vision device of Class B standard can pass through.Yet, wavelength surpasses infrared transmitting tube and the infrared receiving tube of 900nm, especially wavelength is higher over the infrared transmitting tube of 1040nm and the price of infrared receiving tube, use the cost of the infrared touch panel of such infrared transmitting tube and infrared receiving tube greatly to improve, simultaneously, the light of wavelength of transmitting 1040nm is the limit of silicon materials substantially, thereby, utilize the less stable of the infrared light of the infrared transmitting tube transmitting 1040nm that silicon materials make.
Summary of the invention
For the above-mentioned problems in the prior art, the object of the present invention is to provide a kind of infrared touch panel scan method, and use the infrared touch panel of the method, for reducing the emissive power of infrared touch panel, send as few as possible the light and the energy that disturb night vision device, meet night vision condition.
The invention provides a kind of infrared touch panel scan method, the method comprises: reception environment light; The light intensity of received surround lighting and predetermined light intensity are compared, when the light intensity of the described surround lighting of judgement is while being less than described predetermined light intensity, carry out following operation: with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one; The infrared beam receiving according to described infrared receiving tube judges whether to have one or more touch objects in touching surveyed area; And when there is one or more touch objects in judgement, both with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one, also with respect to detected one or more described touch objects, carried out respectively sector scanning to determine the position of one or more described touch objects.
The present invention also provides a kind of infrared touch panel, this infrared touch panel comprises a plurality of infrared transmitting tubes, a plurality of infrared receiving tube, countdown circuit, reception control circuit and control module, wherein, described infrared transmitting tube is for launching infrared beam to described infrared receiving tube; Described infrared receiving tube is used for receiving described infrared beam or surround lighting, and the infrared beam receiving to described control module transmission indication and/or the signal of surround lighting; Described countdown circuit is for infrared transmitting tube described in gating; Described reception control circuit is for infrared receiving tube described in gating; Described control module is for the infrared beam that receives indication from described infrared receiving tube and receive and/or the signal of surround lighting; The light intensity of received surround lighting and predetermined light intensity are compared, when the light intensity of the described surround lighting of judgement is less than described predetermined light intensity, carry out following operation: control described countdown circuit with man-to-man scan mode infrared transmitting tube described in gating one by one, control described reception control circuit with man-to-man scan mode infrared receiving tube described in gating one by one; The signal of the infrared beam receiving according to the indication receiving from described infrared receiving tube judges whether to have one or more touch objects during touching surveyed area; And when there is one or more touch objects in judgement, control described countdown circuit and described reception control circuit both with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one, also described in gating infrared transmitting tube and described infrared receiving tube to carry out sector scanning with respect to detected one or more described touch objects, thereby determine the position of one or more described touch objects.
Utilize the infrared touch panel of infrared touch panel scan method provided by the invention and use the method, can be when reaching night vision condition, only adopt man-to-man scan mode, greatly reduce the power of infrared transmitting tube, when judgement exists after touch objects, both adopted sector scanning mode, for touch objects region, carrying out specific aim scans among a small circle, adopt again man-to-man scan mode, judge whether roughly to also have new touch objects to exist, like this, guaranteeing the pinpoint while, can also send as few as possible the light and the energy that disturb night vision device, thereby can meet the II type Class B standard of the 1394-1992 regulation of GJB.
Accompanying drawing explanation
Fig. 1 shows Class B night vision response criteria curve;
Fig. 2 shows the spectrogram of Taiwan hundred million photoelectronic IR26-51C type infrared transmitting tube;
Fig. 3 shows according to the process flow diagram of the scan method of infrared touch panel of the present invention;
Fig. 4 shows the circuit structure block diagram according to infrared touch panel of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiments of the invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Fig. 3 shows according to the process flow diagram of the scan method of infrared touch panel of the present invention.
With reference to figure 3, the invention provides a kind of infrared touch panel scan method, the method comprises: reception environment light; The light intensity of received surround lighting and predetermined light intensity are compared, when the light intensity of the described surround lighting of judgement is while being less than described predetermined light intensity, carry out following operation: with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one; The infrared beam receiving according to described infrared receiving tube judges whether to have one or more touch objects in touching surveyed area; And when there is one or more touch objects in judgement, both with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one, also with respect to detected one or more described touch objects, carried out respectively sector scanning to determine the position of one or more described touch objects.
Wherein, the light intensity of received surround lighting and predetermined light intensity can be compared, when the light intensity of the surround lighting receiving is less than predetermined light intensity, judge that current surround lighting is darker, reach night vision condition, now can, by reducing the power of infrared transmitting tube, send as few as possible the light and the energy that disturb night vision device.According to the embodiment of the present invention, when reaching night vision condition, adopt man-to-man scan mode to come gating infrared transmitting tube and infrared receiving tube one by one, described man-to-man scan mode is the corresponding infrared transmitting tube of an infrared receiving tube specifically, infrared transmitting tube of gating and an infrared receiving tube corresponding with this infrared transmitting tube successively, by judging whether the infrared beam that infrared receiving tube receives is blocked, judge in the path of infrared beam process and whether have touch objects, by this man-to-man scan mode, can judge roughly and touch in surveyed area whether have one or more touch objects.When there is one or more touch objects in judgement, can with respect to detected one or more described touch objects, carry out respectively sector scanning on the one hand, further to determine the position of one or more described touch objects, also proceed on the other hand man-to-man scanning, thereby whether find You Xin touch point, and the region at judgement place, touch point, be convenient to carry out sector scanning, and judge while there is not touch objects, proceed man-to-man scanning, for finding touch objects.Described sector scanning specifically, is to judge while there is one or more touch objects, in the ，Gai region, region for this one or more touch objects place, scans more accurately, for example, carry out the scanning of one-to-many, further to determine the position of touch point.The scan mode of described one-to-many, i.e. corresponding a plurality of infrared receiving tubes of infrared transmitting tube, gating infrared transmitting tube and corresponding a plurality of infrared receiving tubes one by one, the light beam that makes the transmitting of infrared transmitting tube is received by a plurality of infrared receiving tubes of correspondence, and the infrared beam receiving according to infrared receiving tube is determined the position of described touch objects.In judgement, exist after one or more touch objects, the scanning one to one of carrying out and sector scanning can be parallel carrying out, scan one to one and sector scanning simultaneously, and can be also that serial is carried out, carry out in turn sector scanning and serial scan.
Pass through embodiments of the present invention, when judgement reaches night vision condition, adopt man-to-man scan mode to judge whether roughly to exist touch objects, drive as few as possible infrared transmitting tube and infrared receiving tube, can greatly reduce the power of infrared transmitting tube like this, when judgement exists after touch objects, adopt sector scanning mode, for touch objects region, carrying out specific aim scans among a small circle, rather than all infrared transmitting tubes and infrared receiving tube are carried out to the scanning of one-to-many on a large scale, but also adopt man-to-man scan mode, judge whether roughly to also have new touch objects to exist, like this, guaranteeing the pinpoint while, can also send as few as possible the light and the energy that disturb night vision device.
According to a kind of preferred implementation, described man-to-man scan mode is only along the coaxial scan mode of a direction or from axle scan mode.Wherein, described coaxial scan mode be an infrared transmitting tube with over against an infrared receiving tube corresponding, successively gating infrared transmitting tube and over against an infrared receiving tube, the infrared transmitting tube of gating is along the major axes orientation transmitting infrared beam of infrared touch panel, the infrared receiving tube of gating receives the infrared beam of the above-mentioned transmitting of the major axes orientation along infrared touch panel, described main shaft is X-axis or the Y-axis of infrared touch panel, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, described Y-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Shao limit is positioned at.Described from axle scan mode be a power valve with non-over against an infrared receiving tube corresponding, successively gating infrared transmitting tube and non-over against an infrared receiving tube, the direction that the infrared transmitting tube of gating forms an angle along the major axes orientation with infrared touch panel (direction that departs from main shaft) transmitting infrared beam, the infrared receiving tube of gating receives the above-mentioned infrared beam along departing from the direction transmitting of main shaft.Adopt only along the coaxial scan mode of a direction or from axle scan mode, the zone location that each touch objects can be existed is in the quadrilateral area that the Liang Ge edge light beam of the infrared beam along a direction transmitting of being blocked continuously and corresponding infrared transmitting tube and infrared receiving tube surround.Owing to adopting only along the coaxial scan mode of a direction or from axle scan mode, rather than scan mode in two directions, can be so that the minimum power of infrared transmitting tube.
Further preferably, described man-to-man scan mode is only along the X-axis of described infrared touch panel or the coaxial scan mode of Y-axis, for example, only along the X-axis of touch-screen successively gating infrared transmitting tube and over against infrared receiving tube, or only along the Y-axis of touch-screen successively gating infrared transmitting tube and over against infrared receiving tube.
In the situation that only infrared transmitting tube and infrared receiving tube being carried out man-to-man coaxial scan mode or scanned from axle along a direction, describedly with respect to detected one or more described touch objects, carry out respectively sector scanning and can comprise the following steps to determine the position of one or more described touch objects: determine by one or more described touch objects corresponding infrared transmitting tube of infrared beam of blocking-up and the one or more regions that are blocked between infrared receiving tube continuously, along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one (, the gating infrared transmitting tube in the adjacent two edges of infrared touch panel in region that is blocked successively, and the gating infrared receiving tube on infrared touch panel other adjacent two edges relative with above-mentioned infrared transmitting tube), and for each infrared transmitting tube in the region that is blocked described in one or more one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, described Y-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Shao limit is positioned at, the infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.Thus, can accurately locate the position of touch objects.Be appreciated that above-mentioned zone scan mode is only for exemplary, those skilled in the art also can adopt other sector scanning modes, can as long as can carry out accurate positioning instant to touch point for touch objects region spotting scaming.
According to another kind of embodiment, described man-to-man scan mode can be for the coaxial scan mode along both direction or from axle scan mode.Adopt coaxial scan mode in two directions or from axle scan mode, the zone location that each touch objects can be existed is in the crossing quadrilateral area of the infrared beam of the in two directions transmitting of being blocked continuously, thereby the regional extent of location is less, more accurate.
In the situation that in two directions infrared transmitting tube and infrared receiving tube being carried out man-to-man coaxial scan mode or scanned from axle, describedly with respect to detected one or more described touch objects, carry out respectively sector scanning and can comprise the following steps to determine the position of one or more described touch objects: determine by one or more described touch objects one or more regions that are blocked of intersecting of the infrared beam of blocking-up continuously; Along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one, and for each infrared transmitting tube in the region that is blocked described in one or more one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, the axle that the above infrared transmitting tube of the frame that described Y-axis is infrared touch panel or described infrared receiving tube Shao limit are positioned at; The infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.Thus, can accurately locate the position of touch objects.Be appreciated that above-mentioned zone scan mode is only for exemplary, those skilled in the art also can adopt other sector scanning modes, can as long as can carry out accurate positioning instant to touch point for touch objects region spotting scaming.
According to a kind of embodiment, the method can also comprise: when the light intensity of the described surround lighting of judgement is more than or equal to described predetermined light intensity, along the X-axis of described infrared touch panel and Y-axis gating infrared transmitting tube one by one, and for each infrared transmitting tube one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, the infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects, , the all infrared transmitting tubes of gating in the adjacent two edges of infrared touch panel successively, and the gating infrared receiving tube on infrared touch panel other adjacent two edges relative with above-mentioned infrared transmitting tube.That is to say, when surround lighting stronger, while not reaching night vision condition, can allow infrared transmitting tube and infrared receiving tube with higher power work, at this moment can adopt the scan mode of one-to-many, i.e. corresponding a plurality of infrared receiving tubes of infrared transmitting tube, gating infrared transmitting tube and corresponding a plurality of infrared receiving tubes one by one, the light beam that makes the transmitting of infrared transmitting tube is received by a plurality of infrared receiving tubes of correspondence, and the infrared beam receiving according to infrared receiving tube is determined the position of described touch objects.Be appreciated that when the light intensity of surround lighting is greater than predetermined light intensity, also can adopt other feasible scan modes, and be not limited to above-mentioned specific one-to-many scan mode.
Utilize the infrared touch panel of infrared touch panel scan method provided by the invention and use the method, can be when reaching night vision condition, only adopt man-to-man scan mode, greatly reduce the power of infrared transmitting tube, when judgement exists after touch objects, both adopted sector scanning mode, for touch objects region, carrying out specific aim scans among a small circle, adopt again man-to-man scan mode, judge whether roughly to also have new touch objects to exist, like this, guaranteeing the pinpoint while, can also send as few as possible the light and the energy that disturb night vision device, thereby can meet the II type Class B standard of the 1394-1992 regulation of GJB.
Meanwhile, the present invention also provides a kind of infrared touch panel.Fig. 4 shows the circuit structure block diagram according to infrared touch panel of the present invention.
With reference to figure 4, this infrared touch panel comprises a plurality of infrared transmitting tubes, a plurality of infrared receiving tubes, and countdown circuit, reception control circuit and control module, wherein, described infrared transmitting tube is for launching infrared beam to described infrared receiving tube; Described infrared receiving tube is used for receiving described infrared beam or surround lighting, and the infrared beam receiving to described control module transmission indication and/or the signal of surround lighting; Described countdown circuit is for infrared transmitting tube described in gating; Described reception control circuit is for infrared receiving tube described in gating; Described control module is for the infrared beam that receives indication from described infrared receiving tube and receive and/or the signal of surround lighting; The light intensity of received surround lighting and predetermined light intensity are compared, when the light intensity of the described surround lighting of judgement is less than described predetermined light intensity, carry out following operation: control described countdown circuit with man-to-man scan mode infrared transmitting tube described in gating one by one, control described reception control circuit with man-to-man scan mode infrared receiving tube described in gating one by one; The signal of the infrared beam receiving according to the indication receiving from described infrared receiving tube judges whether to have one or more touch objects during touching surveyed area; And when there is one or more touch objects in judgement, control described countdown circuit and described reception control circuit both with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one, also described in gating infrared transmitting tube and described infrared receiving tube to carry out sector scanning with respect to detected one or more described touch objects, thereby determine the position of one or more described touch objects.
Wherein, control module can receive the signal of indicating the surround lighting receiving from described infrared receiving tube, and the light intensity of described surround lighting and predetermined light intensity are compared, when the light intensity of described surround lighting is less than predetermined light intensity, judge that current surround lighting is darker, reach night vision condition, now can be by controlling described countdown circuit, reduce the power of infrared transmitting tube, send as few as possible the light and the energy that disturb night vision device.According to the embodiment of the present invention, when reaching night vision condition, control described countdown circuit and reception control circuit and come gating infrared transmitting tube and infrared receiving tube one by one with man-to-man scan mode, by this man-to-man scan mode, can judge roughly and touch in surveyed area whether have one or more touch objects.When there is one or more touch objects in judgement, can be on the one hand, control infrared transmitting tube and described infrared receiving tube described in described countdown circuit and described reception control circuit gating and carry out respectively sector scanning with respect to detected one or more described touch objects, further to determine the position of one or more described touch objects, also continue to control on the other hand described countdown circuit and reception control circuit with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one, thereby whether find You Xin touch point, region with judgement place, touch point, be convenient to carry out sector scanning, and while there is not touch objects, proceed man-to-man scanning, for finding touch objects.The scanning one to one of carrying out after judgement exists one or more touch objects and sector scanning can be parallel carrying out, scan one to one and sector scanning simultaneously, and can be also that serial is carried out, carry out in turn sector scanning and serial scan.
Pass through embodiments of the present invention, when judgement reaches night vision condition, adopt man-to-man scan mode to judge whether roughly to exist touch objects, drive as few as possible infrared transmitting tube and infrared receiving tube, can greatly reduce the power of infrared transmitting tube like this, when judgement exists after touch objects, adopt sector scanning mode, for touch objects region, carrying out specific aim scans among a small circle, rather than all infrared transmitting tubes and infrared receiving tube are carried out to the scanning of one-to-many on a large scale, but also adopt man-to-man scan mode, judge whether roughly to also have new touch objects to exist, like this, guaranteeing the pinpoint while, can also send as few as possible the light and the energy that disturb night vision device.
According to a kind of embodiment, described man-to-man scan mode is only along the coaxial scan mode of a direction or from axle scan mode.Adopt only along the coaxial scan mode of a direction or from axle scan mode, the zone location that each touch objects can be existed is in the quadrilateral area that the Liang Ge edge of the infrared beam along side's direction transmitting of being blocked continuously and corresponding infrared transmitting tube and infrared receiving tube surround.Owing to adopting only along the coaxial scan mode of a direction or from axle scan mode, rather than scan mode in two directions, can be so that the minimum power of infrared transmitting tube.
Further preferably, described man-to-man scan mode is only along the X-axis of described infrared touch panel or the coaxial scan mode of Y-axis, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, the axle that the above infrared transmitting tube of the frame that described Y-axis is infrared touch panel or described infrared receiving tube Shao limit are positioned at.
In the situation that only infrared transmitting tube and infrared receiving tube being carried out man-to-man coaxial scan mode or scanned from axle along a direction, thereby describedly with respect to detected one or more described touch objects, carry out respectively sector scanning and determine that the position of one or more described touch objects can comprise the following steps: determine by one or more described touch objects corresponding infrared transmitting tube of infrared beam of blocking-up and the one or more regions that are blocked between infrared receiving tube continuously, control described countdown circuit along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one, and for each infrared transmitting tube in the region that is blocked described in one or more control described reception control circuit one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, described Y-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Shao limit is positioned at, the infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.Thus, can accurately locate the position of touch objects.Be appreciated that above-mentioned zone scan mode is only for exemplary, those skilled in the art also can adopt other sector scanning modes, can as long as can carry out accurate positioning instant to touch point for touch objects region spotting scaming.
According to another kind of embodiment, described man-to-man scan mode is along the coaxial scan mode of both direction or from axle scan mode.Adopt coaxial scan mode in two directions or from axle scan mode, the zone location that each touch objects can be existed is in the crossing quadrilateral area of the infrared beam of the in two directions transmitting of being blocked continuously, thereby the regional extent of location is less, more accurate.
In the situation that in two directions infrared transmitting tube and infrared receiving tube being carried out man-to-man coaxial scan mode or scanned from axle, thereby describedly with respect to detected one or more described touch objects, carry out respectively sector scanning and determine that the position of one or more described touch objects can comprise the following steps: determine by one or more described touch objects one or more regions that are blocked of intersecting of the infrared beam of blocking-up continuously, control described countdown circuit along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one, and for each infrared transmitting tube in the region that is blocked described in one or more control described reception control circuit one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, described Y-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Shao limit is positioned at, the infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.Be appreciated that above-mentioned zone scan mode is only for exemplary, those skilled in the art also can adopt other sector scanning modes, can as long as can carry out accurate positioning instant to touch point for touch objects region spotting scaming.
According to a kind of embodiment, when described control module can also be more than or equal to described predetermined light intensity for the light intensity when the described surround lighting of judgement, control described countdown circuit along the X-axis of described infrared touch panel and Y-axis gating infrared transmitting tube one by one, and receive infrared beam for the infrared receiving tube that each infrared transmitting tube is controlled the one or more correspondences of described reception control circuit gating one by one, and the infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.That is to say, when surround lighting stronger, while not reaching night vision condition, can allow infrared transmitting tube and infrared receiving tube with higher power work, at this moment can adopt the scan mode of one-to-many, i.e. corresponding a plurality of infrared receiving tubes of infrared transmitting tube, gating infrared transmitting tube and corresponding a plurality of infrared receiving tubes one by one, the light beam that makes the transmitting of infrared transmitting tube is received by a plurality of infrared receiving tubes of correspondence, and the infrared beam receiving according to infrared receiving tube is determined the position of described touch objects.Be appreciated that when the light intensity of surround lighting is greater than predetermined light intensity, also can adopt other feasible scan modes, and be not limited to above-mentioned specific one-to-many scan mode.
Preferably, this touch-screen can also comprise sample circuit and analog to digital conversion circuit, and this sample circuit and analog to digital conversion circuit are connected electrically between described infrared receiving tube and described control module.Described sample circuit is for converting the current signal of the infrared light of the expression reception receiving from infrared receiving tube to voltage signal, this sample circuit can be, but not limited to sampling resistor, analog-digital conversion circuit as described converts described voltage signal to digital signal, and this digital signal is input to control module.
Further preferably, this touch-screen can also comprise filtering circuit and amplifying circuit, and described filtering circuit and described amplifying circuit are connected electrically between described sample circuit and analog-digital conversion circuit as described.Described filtering circuit is for carrying out filtering to the voltage signal receiving from described sample circuit, and filtered signal is outputed to amplifying circuit, described amplifying circuit is used for the signal receiving from described filtering circuit to amplify, and the signal after amplifying is outputed to analog to digital conversion circuit.
Utilize infrared touch panel provided by the invention, can when reaching night vision condition, only adopt man-to-man scan mode, greatly reduce the power of infrared transmitting tube, when judgement exists after touch objects, both adopt sector scanning mode, and for touch objects region, carried out specific aim and scan among a small circle, adopted again man-to-man scan mode, judge whether roughly to also have new touch objects to exist, like this, guarantee the pinpoint while, can also send as few as possible the light and the energy that disturb night vision device.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, the technician of any skilled is in technical scope disclosed by the invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (16)
1. an infrared touch panel scan method, the method comprises:
Reception environment light;
The light intensity of received surround lighting and predetermined light intensity are compared, when the light intensity of the described surround lighting of judgement is less than described predetermined light intensity, carry out following operation:
With man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one;
The infrared beam receiving according to described infrared receiving tube judges whether to have one or more touch objects in touching surveyed area; And
When there is one or more touch objects in judgement, both with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one, also with respect to detected one or more described touch objects, carried out respectively sector scanning to determine the position of one or more described touch objects.
2. infrared touch panel scan method according to claim 1, wherein, described man-to-man scan mode is only along the coaxial scan mode of a direction or from axle scan mode.
3. infrared touch panel scan method according to claim 2, wherein, described man-to-man scan mode is only along the X-axis of described infrared touch panel or the coaxial scan mode of Y-axis, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, the axle that the above infrared transmitting tube of the frame that described Y-axis is infrared touch panel or described infrared receiving tube Shao limit are positioned at.
4. infrared touch panel scan method according to claim 2, wherein, describedly with respect to detected one or more described touch objects, carry out respectively sector scanning and comprise to determine the position of one or more described touch objects:
Determine by the corresponding infrared transmitting tube of infrared beam of the continuous blocking-up of one or more described touch objects and the one or more regions that are blocked between infrared receiving tube;
Along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one, and for each infrared transmitting tube in the region that is blocked described in one or more one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, the axle that the above infrared transmitting tube of the frame that described Y-axis is infrared touch panel or described infrared receiving tube Shao limit are positioned at;
The infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.
5. infrared touch panel scan method according to claim 1, wherein, described man-to-man scan mode is along the coaxial scan mode of both direction or from axle scan mode.
6. infrared touch panel scan method according to claim 5, wherein, describedly with respect to detected one or more described touch objects, carry out respectively sector scanning and comprise to determine the position of one or more described touch objects:
Determine one or more regions that are blocked of intersecting of the infrared beam of being blocked continuously by one or more described touch objects;
Along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one, and for each infrared transmitting tube in the region that is blocked described in one or more one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, the axle that the above infrared transmitting tube of the frame that described Y-axis is infrared touch panel or described infrared receiving tube Shao limit are positioned at;
The infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.
7. according to the infrared touch panel scan method described in any one claim in claim 1-6, wherein, the method also comprises:
When the light intensity of the described surround lighting of judgement is more than or equal to described predetermined light intensity, along the X-axis of described infrared touch panel and Y-axis gating infrared transmitting tube one by one, and for each infrared transmitting tube one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, the infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.
8. an infrared touch panel, this infrared touch panel comprises a plurality of infrared transmitting tubes, a plurality of infrared receiving tubes, countdown circuit, reception control circuit and control module, wherein,
Described infrared transmitting tube is for launching infrared beam to described infrared receiving tube;
Described infrared receiving tube is used for receiving described infrared beam or surround lighting, and the infrared beam receiving to described control module transmission indication and/or the signal of surround lighting;
Described countdown circuit is for infrared transmitting tube described in gating;
Described reception control circuit is for infrared receiving tube described in gating;
Described control module is for the infrared beam that receives indication from described infrared receiving tube and receive and/or the signal of surround lighting; The light intensity of received surround lighting and predetermined light intensity are compared, when the light intensity of the described surround lighting of judgement is less than described predetermined light intensity, carry out following operation:
Control described countdown circuit with man-to-man scan mode infrared transmitting tube described in gating one by one, control described reception control circuit with man-to-man scan mode infrared receiving tube described in gating one by one;
The signal of the infrared beam receiving according to the indication receiving from described infrared receiving tube judges whether to have one or more touch objects during touching surveyed area; And
When there is one or more touch objects in judgement, control described countdown circuit and described reception control circuit both with man-to-man scan mode gating infrared transmitting tube and infrared receiving tube one by one, also described in gating infrared transmitting tube and described infrared receiving tube to carry out sector scanning with respect to detected one or more described touch objects, thereby determine the position of one or more described touch objects.
9. infrared touch panel according to claim 8, wherein, described man-to-man scan mode is only along the coaxial scan mode of a direction or from axle scan mode.
10. infrared touch panel according to claim 9, wherein, described man-to-man scan mode is only along the X-axis of described infrared touch panel or the coaxial scan mode of Y-axis, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, the axle that the above infrared transmitting tube of the frame that described Y-axis is infrared touch panel or described infrared receiving tube Shao limit are positioned at.
11. infrared touch panels according to claim 9, wherein, thereby describedly carry out respectively sector scanning with respect to detected one or more described touch objects and determine that the position of one or more described touch objects comprises:
Determine by the corresponding infrared transmitting tube of infrared beam of the continuous blocking-up of one or more described touch objects and the one or more regions that are blocked between infrared receiving tube;
Control described countdown circuit along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one, and for each infrared transmitting tube in the region that is blocked described in one or more control described reception control circuit one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, described Y-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Shao limit is positioned at,
The infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.
12. infrared touch panels according to claim 8, wherein, described man-to-man scan mode is along the coaxial scan mode of both direction or from axle scan mode.
13. infrared touch panels according to claim 12, wherein, thereby describedly carry out respectively sector scanning with respect to detected one or more described touch objects and determine that the position of one or more described touch objects comprises:
Determine one or more regions that are blocked of intersecting of the infrared beam of being blocked continuously by one or more described touch objects;
Control described countdown circuit along the X-axis of described infrared touch panel and the Y-axis infrared transmitting tube that gating is blocked described in one or more in region one by one, and for each infrared transmitting tube in the region that is blocked described in one or more control described reception control circuit one by one the infrared receiving tube of the one or more correspondences of gating receive infrared beam, described X-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Duo limit is positioned at, described Y-axis is the above infrared transmitting tube of frame of infrared touch panel or the axle that described infrared receiving tube Shao limit is positioned at,
The infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.
Infrared touch panel in 14. according to Claim 8-13 described in any one claim, wherein, when described control module is also more than or equal to described predetermined light intensity for the light intensity when the described surround lighting of judgement, control described countdown circuit along the X-axis of described infrared touch panel and Y-axis gating infrared transmitting tube one by one, and receive infrared beam for the infrared receiving tube that each infrared transmitting tube is controlled the one or more correspondences of described reception control circuit gating one by one, and the infrared beam receiving according to described infrared receiving tube is determined the position of described touch objects.
15. infrared touch panels according to claim 8, wherein, this touch-screen also comprises sample circuit and analog to digital conversion circuit, this sample circuit and analog to digital conversion circuit are connected electrically between described infrared receiving tube and described control module.
16. infrared touch panels according to claim 15, wherein, this touch-screen also comprises filtering circuit and amplifying circuit, described filtering circuit and described amplifying circuit are connected electrically between described sample circuit and analog-digital conversion circuit as described.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210226494.6A CN103513827A (en) | 2012-06-29 | 2012-06-29 | Infrared touch screen scan method and infrared touch screen |
| PCT/CN2013/075376 WO2014000512A1 (en) | 2012-06-29 | 2013-05-09 | Infrared touchscreen scanning method and infrared touchscreen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210226494.6A CN103513827A (en) | 2012-06-29 | 2012-06-29 | Infrared touch screen scan method and infrared touch screen |
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| CN103513827A true CN103513827A (en) | 2014-01-15 |
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| CN201210226494.6A Pending CN103513827A (en) | 2012-06-29 | 2012-06-29 | Infrared touch screen scan method and infrared touch screen |
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| CN (1) | CN103513827A (en) |
| WO (1) | WO2014000512A1 (en) |
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| WO2014000512A1 (en) | 2014-01-03 |
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