CN103399671A - Double-camera touch screen and touch pen thereof - Google Patents
Double-camera touch screen and touch pen thereof Download PDFInfo
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- CN103399671A CN103399671A CN2013101856679A CN201310185667A CN103399671A CN 103399671 A CN103399671 A CN 103399671A CN 2013101856679 A CN2013101856679 A CN 2013101856679A CN 201310185667 A CN201310185667 A CN 201310185667A CN 103399671 A CN103399671 A CN 103399671A
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Abstract
The invention relates to the field of touch screens, in particular to an optical touch screen. A double-camera touch screen comprise a touch panel and a signal processing system and further comprises a light sensor set, wherein the light sensor set comprises multiple light sensors which are connected with the signal processing system. A double-camera touch screen light source comprises a light source, and light rays generated by the light source evenly irradiate on the touch panel which is provided with transparent media on the outer surface and are transmitted towards the outer side of the touch panel. A contact type touch pen comprises a switch and a luminous element, and the switch controls the luminous states of the luminous element. A remote touch pen comprises a laser and a power source and further comprises an outer shell enabling handholding to be convenient, wherein the laser and the power source are arranged in the outer shell, a switch is arranged between the laser and the power source, and the switch is arranged on the outer shell. The double-camera touch screen and the touch pen thereof are strong in anti-interference capability, fearless of oil contamination and suitable for factory workshops, mining areas and other sites with mass oil contamination. The double-camera touch screen and the touch pen thereof can achieve the switching of a remote touch mode and a contact type touch mode easily.
Description
Technical field
The present invention relates to the touch-screen field, be specifically related to a kind of optical touch screen.
Background technology
Existingly utilize the touch-screen that optical characteristics is made to mainly contain two kinds, a kind of is infrared touch panel; A kind of is the touch-screen that is called the electronic laser blank that is mainly used in projector, utilizes the laser tracking technology surface sweeping to touch person's handwriting.
Existing infrared touch panel, comprise that correlation type infrared touch screen and the back side are provided with the infrared touch panel of optical receiver component.Infrared touch panel, with respect to other touch-screens, has the series of advantages such as stable performance, antijamming capability is strong, the life-span is long, precision is high.Almost, with overwhelming advantage, capture gradually the market of other touch-screens.
But infrared touch panel still has a fatefulue weakness to be difficult to overcome, and is exactly that infrared window is afraid of dirty.At uncleanly environment, should not use, such as not being applied in the heavier occasions of greasy dirt such as factory floor, mining area; Such as not being applied in the open public arena such as train Waiting Lounge, extramural cash dispenser.In the screen outside, will fill the infrared emission pipe in addition, have influence on the compactedness of structure, on small-sized screen, inconvenience is adopted, and as inconvenience, is used on the screen of mobile phone and palm PC.The infrared touch panel cost is still higher in addition, and resolution is still lower.
The main application of electronic laser whiteboard system is to coordinate projector to use.The generating laser for the scanning projector screen respectively is equipped with in the projecting apparatus screen both sides.After the electronic laser blank started, generating laser sent laser scanning projection's instrument screen surface.The sensitization pen supporting with it has the function of induction laser, and when the user used the sensitization pen to operate on electronic whiteboard like this, generating laser can scan the position of sensitization pen.The electronic laser whiteboard system carries out with computer by the positional information of sensitization pen alternately.
Electronic laser whiteboard system structure is comparatively complicated, so cost is also high, general price is at 3000 yuan to 7000 yuan.The Installation and Debugging difficulty, need the professional to divide and locate its laser scanning section during installation, locate in inaccurate or use and slightly move and all easily cause maloperation, even can cause and can not normally use, so use occasion is very limited.
The touch-screen that can allow the people lie prone and write in the above, also do not appear that till now a kind of sensitive paper is opened, in comprehensive existing touch-screen.People can't obtain original sensation of writing and convenient by touch-screen.Existing touch-screen still exist poor anti jamming capability, resolution low, be not easy to the shortcomings such as Long-distance Control.
Summary of the invention
The object of the present invention is to provide a kind of dual camera touch-screen, can effectively improve the performance of touch-screen.
The present invention also aims to the felt pen that provides supporting with the dual camera touch-screen, described felt pen, comprise contact felt pen and remote touch pen.The contact felt pen, coordinate the dual camera touch-screen to carry out the contact touch.The remote touch pen, coordinate the dual camera touch-screen to realize remote touch.
The present invention is by the following technical solutions for achieving the above object:
The dual camera touch-screen, comprise touch pad, signal processing system, also comprise the light activated element group, described light activated element group comprises a plurality of light activated elements, a plurality of light activated elements connect signal processing system, and the light activated element in the light activated element group is connected by light with touch pad;
While using the dual camera touch-screen, on touch pad, present a relevant luminous point, light activated element is subject to the irradiation from the light of described luminous point, is reflected as relevant electric signal.
On touch pad, present a relevant luminous point, the light activated element group is subject to the irradiation from the light of described luminous point, is reflected as relevant electric signal, and the intensity of described electric signal and light activated element are to the distance dependent of described luminous point; The electric signal that light activated element produces is sent to signal processing system, and signal processing system, by the information that comprises intensity of a plurality of electric signal of analyzing a plurality of light activated elements and producing, obtains the positional information of described luminous point on touch pad.
All right, described dual camera touch-screen comprises a plurality of light activated element groups, and described light activated element group the place ahead is provided with a plus lens.By plus lens, light is converged on the light-sensitive surface of described light activated element group.Plus lens can be by luminous point clearly as being presented on light-sensitive surface, and the irradiation that also can just the process of luminous point be converged, on light-sensitive surface, is not necessarily wanted imaging.
After having adopted plus lens, the electric signal that produces on described light activated element group, relevant with respect to distance and the angle of described light activated element group with luminous point.Permission is integrated in the light activated element of light activated element group in less space, can reduce manufacture difficulty, and reduce costs.Introduce in addition the angular relationship between light activated element group and luminous point, helped to determine the position of luminous point.
The electric signal that light activated element produces is sent to signal processing system, and the electrical signal information that signal processing system produces by analyzing the light activated element group, obtain the positional information of described luminous point on touch pad.Signal processing system is processed the electric signal that produces on described light activated element group, can process in electric signal the information with distance dependent, also can process information relevant with angle in electric signal, can also overall treatment.
The light activated element group can combine in order by a plurality of independently light activated elements, also a plurality of light activated elements can be integrated on an integrated package, can also directly adopt the imageing sensor that is integrated with a large amount of light activated elements.
When described luminous point glimmers with certain frequency, light activated element will produce the electric signal of the vibration relevant to the optical signal frequency of luminous point, the electric signal of vibration is convenient to amplify, frequency-selecting, has better anti-interference, therefore described luminous point is selected the luminous point with the certain frequency flicker, and signal processing system comprises a frequency-selecting module corresponding with described luminous point flicker frequency.The luminous point that can be identified by the dual camera touch-screen that presents on touch pad, think the luminous point relevant to the dual camera touch-screen.Generally relevant luminous point need to meet, and flicker frequency is corresponding with the frequency-selecting module of dual camera touch-screen, and the wavelength of light of luminous point is corresponding with the reception wavelength of light activated element.
In technique scheme, do not relate to the requirement to the touch pad shape, the shape of touch pad is not subjected to concrete restriction.Because the screen that uses now is mostly tetragonal screen, referring to tetragonal touch pad, explain.
Signal processing system in the present invention, can by luminous point relatively to light activated element in the light activated element group apart from the difference relation, obtain the position of described luminous point, the difference of distance is reflected by the difference of the light signal strength from described luminous point that each light activated element receives.For the touch pad on plane, only need the light activated element of two row's cross arrangements both can determine the position of luminous point.The transversely arranged light activated element of one row, by the relevant electric signal difference relation that each light activated element produces, determine the lateral coordinates of luminous point; The light activated element of one row's longitudinal arrangement, by the relevant electric signal difference relation that each light activated element produces, determine the along slope coordinate of luminous point, thereby determine the position of luminous point on touch pad.Described " light activated element in the light activated element group is connected by light with touch pad " refers in the light through touch pad, and Ray Of Light is through light activated element at least.Light activated element in the light activated element group needn't all be connected by light with touch pad, but has at least two light activated elements to be connected by light with touch pad.
Signal processing system in the present invention, can also obtain by the angular relationship between luminous point and light activated element group the position of described luminous point.The present invention converges to light on the light-sensitive surface of described light activated element group by plus lens.Angular relationship is reflected by plus lens the position that the light signal of described luminous point converges on the light activated element group.For the touch pad on plane, two groups of light activated element groups with plus lens can be determined the position of luminous point.A light activated element group is determined polar coordinates relevant with angle, and two light activated element groups are determined two interlaced polar coordinates relevant with angle.By the information that comprises that two polar coordinates are determined, determine the position of luminous point.
When signal processing system obtains the position of described luminous point by the angular relationship between luminous point and light activated element group, also can analyze the difference relation of the light signal strength on light activated element in the light activated element group, to improve precision.
Touch pad can be selected the screen of display, as screen, liquid crystal display equipment screen, negative electrode display tube display (CRT) screen, the screen of light-emitting diode display, the projecting apparatus screen of projecting display; Can also select the transparent protective shield in screen the place ahead.
Light activated element when touch pad is screen in the light activated element group can be arranged on screen periphery.When screen was the screen of printing opacity, as the screen of projecting display, because the light of luminous point can penetrate screen, the light activated element in light light activated element group can be arranged on except being arranged in screen the place ahead, can also be arranged in the screen rear; Screen is that the place ahead is while being the screen of transparent medium, transparent medium such as glass, transparent plastics, the light that luminous point penetrates can be at the transparent medium internal communication around transparent medium, therefore the light activated element in the light activated element group, except being arranged in around screen the place ahead, can also be arranged in around the light transmission medium edge.
The light activated element group can arrange plus lens, also can not arrange.In the situation that plus lens is set, corresponding selection, by comprising the information of the angular relationship between luminous point and light activated element group, obtain the signal processing system of described light spot position.In the situation that plus lens is not set, corresponding selection, obtain the signal processing system of the position of described luminous point by luminous point relatively to light activated element in the light activated element group apart from the difference relation.The situation that following content keypoint does not arrange plus lens with the light activated element group is attached most importance to and is told about.
When touch pad was transparent protective shield, the light of luminous point obviously can penetrate protective shield, so the light activated element group can be arranged on the place ahead of protective shield; Also can be arranged between screen and protective shield, i.e. the back of protective shield; Can also be arranged in around the protective shield edge.According to above-mentioned project organization, the dual camera touch-screen can be made polytype dual camera touch-screen.
The present invention divides according to mode of operation is different, comprises the dual camera touch-screen that contact touches, the dual camera touch-screen of remote touch.
One, the dual camera touch-screen of contact touch
The light source of described luminous point has three kinds of forms, and a kind of form is that dual camera touch-screen itself does not have light source, and the extraneous device that uses with the collocation of dual camera touch-screen has light source, the device of collocation such as contact felt pen, and this light source produces described luminous point; A kind of form is that the dual camera touch-screen itself has the dual camera touch screen light source, and the dual camera touch screen light source has light source, and this light source is the light source of described luminous point; A kind of form is that the dual camera touch-screen itself has the dual camera touch screen light source, and extraneous device with the collocation of dual camera touch-screen also has light source, and the light source of described luminous point is any light source wherein.
(1) dual camera touch-screen itself does not have light source:
Need extraneous device and the dual camera touch-screen that uses with the collocation of dual camera touch-screen to be used in conjunction with, the device of collocation such as contact felt pen.
The contact felt pen is luminous when with optical touch pad, contacting, and on touch pad, forms a luminous point, and luminous point moves with the movement of contact felt pen, thereby realizes the touch operation of contact felt pen to the dual camera touch-screen by mobile luminous point.
The contact felt pen, is characterized in that, comprises a shell, power supply, switch and light-emitting component, and switch is controlled the luminous situation of light-emitting component; Switch is connected with the touch end of contact felt pen, touches end trigger switch when touching touch pad, and light-emitting component is luminous, on touch pad, forms luminous point.
Between power supply and light-emitting component, can access the signal generating module that produces electric oscillation signal, make light-emitting component produce the light signal of flicker.
The touch pad Application Range is wider, as screen, liquid crystal display equipment screen, negative electrode display tube display (CRT) screen, the screen of light-emitting diode display, the projecting apparatus screen of projecting display; Can also select the transparent protective shield in various screens the place ahead.
When touch pad is screen in the light activated element group light activated element be arranged in screen periphery.Screen is while having the screen of light transmission, and as the screen of projecting display, because luminous point can penetrate screen, in the light activated element group, light activated element, except being arranged in screen the place ahead, can also be arranged in the screen rear; Screen is that the place ahead is while being the screen of transparent medium, transparent medium such as glass, transparent plastics, the light that luminous point penetrates can be at the transparent medium internal communication to the transparent medium periphery, therefore in the light activated element group, light activated element removes and can be arranged in screen the place ahead, can also be arranged in around the transparent medium edge, can also be embedded in transparent medium inside.
When touch pad was transparent protective shield, the light of luminous point obviously can penetrate protective shield, so the light activated element group can be arranged on the place ahead of protective shield, and is arranged in around protective shield; Also can be arranged between screen and protective shield, namely the back of protective shield, be arranged in around protective shield; Can also be arranged in around the protective shield edge; Can also be embedded in transparent medium inside.
(2) dual camera touch-screen itself has the dual camera touch screen light source:
The dual camera touch-screen also comprises a dual camera touch screen light source, and described have a light source.The touch pad front portion is transparent medium, and the light that described light source produces is radiated at outside surface more uniformly to be had on the touch pad of transparent medium, and to touch pad outside transmission.
Light source is radiated on touch pad more uniformly from the touch pad back side or side, and to the touch pad more uniform transmission in the outside; Use one to touch part contact touch pad, touch the irradiation that part is subject to the light of light source, form luminous point.Described touch part refers to the object that touches touch pad, can be finger, pen etc.
Luminous point move with the movement that touches part, the movement by luminous point, luminous point have or not and the information realizations such as the flicker frequency touch part of luminous point to the touch operation of dual camera touch-screen.
Touch pad can be selected the protective shield of screen transparent front, can also select screen.If select screen, needing screen the place ahead is transparent medium, as selected liquid crystal display equipment screen, negative electrode display tube display (CRT) screen.
Take protective shield as touch pad:
A horizontal side in close screen one side of protective shield is provided with strip-shaped light source, another horizontal side is provided with the light activated element group that row's light activated element forms, the light of strip-shaped light source sees through protective shield, and direction of illumination is another horizontal side relative with it, and slight oblique protective shield the place ahead; A vertical side in close screen one side of protective shield is provided with strip-shaped light source, another vertical side is provided with the light activated element group that row's light activated element forms, the light of strip-shaped light source sees through protective shield, and direction of illumination is another vertical side relative with it, and slight oblique protective shield the place ahead.Because strip-shaped light source is slight oblique protective shield the place ahead, so can have the light that is in the total reflection state in protective shield, it is even that these light also are conducive to light.
Two row's light activated elements connect one, by luminous point relatively to light activated element in the light activated element group, apart from the difference relation, obtain the signal processing system of the position of described luminous point.Two above-mentioned light activated element groups that formed by row's light activated element, can replace to the light activated element group that is provided with plus lens, two light activated element groups that are provided with plus lens connect by comprising the information of the angular relationship between luminous point and light activated element group, obtain the signal processing system of described light spot position.Two light activated element groups that are provided with plus lens, be easy to be arranged on the bight of protective shield, can effectively reduce blind area.
Described strip-shaped light source, can be the light source of the strip that is arranged in by a plurality of little sub-light sources, also can comprise the luminophor of a strip.
In the time need not touching part and touch touch pad, the light that light activated element receives a little less than, the light intensity on touch pad is comparatively even, does not have luminous point; While with the touch part, touch pad being touched, light forms luminous point on touch pad.Luminous point move with the movement that touches part, thus the movement by luminous point, luminous point the information such as have or not, realize the touch operation of touch part to the dual camera touch-screen.
The touch part is formed to the luminous point principle describe when with touch pad, contacting, and witness:
Touch part from touch pad away from the time, in the light that is appeared by touch pad, only have a small amount of light to be radiated at and touch on part, wherein only have again small part light to be reflected back again touch pad, and the light that is reflected back is not concentrated, can not form luminous point, the dual camera touch-screen does not respond.When the touch part contacted with touch pad, light can not penetrate touch pad, was directly touching part and touch pad contact position formation luminous point.The present invention obtains the position of described luminous point to the distance of each light activated element in the light activated element group by luminous point relatively, even the area of luminous point does not affect greatly dual camera touch-screen determining its position yet.
Correctness with an above-mentioned principle of simple experimental evidence: at dark night, in the brighter room of light, almost cannot see the things of outside surface of glass window, the glass of windowpane is as minute surface.Suppose to have a people outside glass window, he from windowpane away from the time, even the light that windowpane appears can shine this people, we can't see him, light reflection that this proof windowpane penetrates is returned seldom.When he is pressed in nose on glass, we can see that his nose is very bright, form a luminous point, other position of face with glasses interval from increase sharply dimmed.
Above-mentioned simple experimental test and the present invention are contrasted: make strip-shaped light source produce the light signal with certain flicker frequency, the frequency-selecting module of signal processing system is only chosen the electric signal relevant to the strip-shaped light source flicker frequency, be that the dual camera touch-screen system is only identified the light that strip-shaped light source produces, with respect to the dual camera touch-screen, the outside of touch pad is dark, with the condition in above-mentioned experimental test, all conforms to.Therefore can be to touch part analogy nose, the glass of touch pad analogy windowpane, light activated element analogy eyes, this proof touches when part touches touch pad can form a luminous point.
A plurality of strip-shaped light sources, while penetrating light simultaneously, the light that touch pad penetrates is difficult to evenly, likely has influence on determining light spot position.
Can solve like this light and be difficult to uniform problem,, the light signal that penetrates of strip light source, by corresponding with it light activated element, be converted into corresponding electric signal and be sent to signal processing system, signal processing system will this corresponding electric signal as the location dependent information of the described luminous point of acquisition on touch pad.The light activated element corresponding with other strip-shaped light sources can not be sent to signal processing system by the light signal that this strip light source penetrates, perhaps the light activated element corresponding with other strip-shaped light sources can be sent to signal processing system by the light signal that this strip light source penetrates, but signal processing system will this corresponding electric signal as the location dependent information of the described luminous point of acquisition on touch pad.
Specifically can solve in the following way light and be difficult to uniform problem: described a plurality of strip-shaped light sources are alternately lighted, and when wherein a strip light source was not lighted, the electric signal of corresponding light activated element group output was not received with it.Article one, during the strip light source igniting, the electric signal of corresponding light activated element group output is received and processes by signal processing system with it.What each light activated element group received like this is the light that a strip light source penetrates, and the light of a strip light source ejaculation is easy to be incident upon on touch pad uniformly.
Specifically can also solve in the following way light and be difficult to uniform problem: a plurality of strip-shaped light sources, with each strip-shaped light source to the deserved light activated element that is provided with; Each strip-shaped light source has respectively the flicker frequency that differs larger; Each light activated element corresponding with each strip-shaped light source connects respectively the frequency-selecting module corresponding with this strip-shaped light source flicker frequency.
(3) dual camera touch-screen itself has light source, and extraneous device with the collocation of dual camera touch-screen also has light source:
Realize that the dual camera touch-screen itself has light source, extraneous device with the collocation of dual camera touch-screen also has the situation of light source, as long as to the dual camera touch-screen that itself has light source, be equipped with the device with light source that uses with the collocation of dual camera touch-screen, can have simultaneously two kinds of patterns.Close the light source of dual camera touch-screen itself, the dual camera touch-screen is that dual camera touch-screen itself does not have the pattern of light source; Open the light source of dual camera touch-screen itself, the dual camera touch-screen is the pattern that the dual camera touch-screen itself has light source.
Two, the dual camera touch-screen of remote touch
Need to be used in conjunction with the device that the dual camera touch-screen collocation of remote touch is used.The device that collocation is used, as the remote touch pen.
The remote touch pen comprises laser instrument, power supply, also comprises that one is convenient to hand-held shell, and described laser instrument, power supply setting in the enclosure, are provided with switch between described laser instrument and described power supply, and described switch is arranged on described shell.
Further, the remote touch pen also comprises a signal generating module, and power supply connects signal generating module, the signal generating module connecting laser, and signal generating module produces the electric signal of vibration, and drive laser is sent the laser signal of the flicker corresponding with electric signal.
The remote touch pen produces light beam, and this light beam forms a luminous point on touch pad.The remote touch pen, by the Long-distance Control luminous point, is realized corresponding operated from a distance to the dual camera touch-screen.
It is basic identical that the dual camera touch-screen itself that the dual camera touch-screen principle of work of remote touch and structure and contact touch does not have the form of light source, difference focuses on the remote touch pen and can produce the light beam that a light intensity is stronger, from touch pad away from the time, can on touch pad, form luminous point.Therefore by the remote touch pen is replaced by to the contact felt pen, the dual camera touch-screen of remote touch can be converted into to the dual camera touch-screen that contact touches, vice versa.Between the dual camera touch-screen that the dual camera touch-screen of remote touch and contact touch, can transform easily.
In the light activated element group of remote touch, the setting of light activated element is comparatively free, can be arranged on the place ahead of screen, also can be arranged on the place ahead of protective shield.
Remote touch pen and contact felt pen, can communicate by light signal and the dual camera touch-screen of flicker, one coding lock system is set for the dual camera touch-screen, a supporting electron key system is set for the signal generating module of contact felt pen and remote touch pen.The dual camera touch-screen system is realized to locking, prevent that the irrelevant personnel from operating.
As shown in the above, the dual camera touch-screen described in the present invention, do not contact with the electron device of dual camera touch-screen itself in use procedure, so long service life.Touch pad adopts the original parts of display, does not take up room.Not only realize remote touch, can also realize easily the conversion between remote touch pattern and contact touch mode.Determining of the position of luminous point is only relevant with the position of luminous point, and has or not greasy dirt irrelevant on the power of luminous point light intensity, touch pad.So antijamming capability is strong, be not afraid of greasy dirt, is applicable to the heavier occasions of greasy dirt such as factory floor, mining area.Between the dual camera touch-screen that the dual camera touch-screen of remote touch and contact touch, can transform easily, and be convenient to encrypt.Allow to exist a plurality of luminous points, can realize the multi-touch function.
The accompanying drawing explanation
In Fig. 1, a is contact felt pen overall diagram, and b is contact felt pen electrical schematic diagram;
In Fig. 2, a is a remote touch overall diagram, and b is a remote touch electrical schematic diagram;
Fig. 3 is front view and the lateral plan of remote touch pen with fixed sturcture of a ring shape;
Fig. 4 is the lateral plan of remote touch pen with fixed sturcture of two ring shapes;
Fig. 5 is the touch pad structural drawing that is provided with two row's light activated elements in specific embodiment one;
Fig. 6 is the light-filtering channels structural drawing;
In Fig. 7, a is light activated element and signal processing system annexation schematic diagram, and b is light activated element and the signal processing system annexation schematic diagram that has improved dual camera touch-screen resolution;
In Fig. 8, a is that schematic diagram is divided in the lateral coordinates zone, and b is that schematic diagram is divided in the lateral coordinates zone of having improved dual camera touch-screen resolution;
The schematic diagram of the coordinates regional of Fig. 9 square shape that to be lateral coordinates zone surrender with the along slope coordinate zone;
Figure 10 is the structural representation that light source is arranged on the touch pad back side;
Figure 11 is the structural representation that light source is arranged on the touch pad side;
Figure 12 is the light activated element of the touch pad area when larger schematic diagram of arranging;
Figure 13 is touch pad light activated element schematic diagram of arranging while being the screen of the large screen back projection formula display that is spliced to form by a plurality of the small screen;
Figure 14 is touch pad light activated element schematic diagram of arranging while being the screen of light-emitting diode display;
Figure 15 adopts the coordinates regional that the light activated element group of plus lens is equipped with in the place ahead to divide schematic diagram.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
The dual camera touch-screen, comprise touch pad, signal processing system, also comprise the light activated element group, described light activated element group comprises a plurality of light activated elements, a plurality of light activated elements connect signal processing system, and the light activated element in the light activated element group is connected by light with touch pad;
While using the dual camera touch-screen, on touch pad, present a relevant luminous point, light activated element is subject to the irradiation from the light of described luminous point, is reflected as relevant electric signal.
On touch pad, present a relevant luminous point, the light activated element group is subject to the irradiation from the light of described luminous point, is reflected as relevant electric signal, and the intensity of described electric signal and light activated element are to the distance dependent of described luminous point; The electric signal that light activated element produces is sent to signal processing system, and signal processing system, by the information that comprises intensity of a plurality of electric signal of analyzing a plurality of light activated elements and producing, obtains the positional information of described luminous point on touch pad.
All right, described dual camera touch-screen comprises a plurality of light activated element groups, and described light activated element group the place ahead is provided with a plus lens.By plus lens, light is converged on the light-sensitive surface of described light activated element group.Plus lens can be by luminous point clearly as being presented on light-sensitive surface, and the irradiation that also can just the process of luminous point be converged, on light-sensitive surface, is not necessarily wanted imaging.
After having adopted plus lens, the electric signal that produces on described light activated element group, relevant with respect to distance and the angle of described light activated element group with luminous point.Permission is integrated in the light activated element of light activated element group in less space, can reduce manufacture difficulty, and reduce costs.Introduce in addition the angular relationship between light activated element group and luminous point, helped to determine the position of luminous point.
The electric signal that light activated element produces is sent to signal processing system, and the electrical signal information that signal processing system produces by analyzing the light activated element group, obtain the positional information of described luminous point on touch pad.Signal processing system is processed the electric signal that produces on described light activated element group, can process in electric signal the information with distance dependent, also can process information relevant with angle in electric signal, can also overall treatment.
The light activated element group can combine in order by a plurality of independently light activated elements, also a plurality of light activated elements can be integrated on an integrated package, can also directly adopt the imageing sensor that is integrated with a large amount of light activated elements.
When described luminous point glimmers with certain frequency, light activated element will produce the electric signal of the vibration relevant to the optical signal frequency of luminous point, the electric signal of vibration is convenient to amplify, frequency-selecting, has better anti-interference, therefore described luminous point is selected the luminous point with the certain frequency flicker, and signal processing system comprises a frequency-selecting module corresponding with described luminous point flicker frequency.The luminous point that can be identified by the dual camera touch-screen that presents on touch pad, think the luminous point relevant to the dual camera touch-screen.Generally relevant luminous point need to meet, and flicker frequency is corresponding with the frequency-selecting module of dual camera touch-screen, and the wavelength of light of luminous point is corresponding with the reception wavelength of light activated element.
In technique scheme, do not relate to the requirement to the touch pad shape, the shape of touch pad is not subjected to concrete restriction.Because the screen that uses now is mostly tetragonal screen, referring to tetragonal touch pad, explain.
Signal processing system in the present invention, can by luminous point relatively to light activated element in the light activated element group apart from the difference relation, obtain the position of described luminous point, the difference of distance is reflected by the difference of the light signal strength from described luminous point that each light activated element receives.For the touch pad on plane, only need the light activated element of two row's cross arrangements both can determine the position of luminous point.The transversely arranged light activated element of one row, by the relevant electric signal difference relation that each light activated element produces, determine the lateral coordinates of luminous point; The light activated element of one row's longitudinal arrangement, by the relevant electric signal difference relation that each light activated element produces, determine the along slope coordinate of luminous point, thereby determine the position of luminous point on touch pad.Described " light activated element in the light activated element group is connected by light with touch pad " refers in the light through touch pad, and Ray Of Light is through light activated element at least.Light activated element in the light activated element group needn't all be connected by light with touch pad, but has at least two light activated elements to be connected by light with touch pad.
Signal processing system in the present invention, can also obtain by the angular relationship between luminous point and light activated element group the position of described luminous point.The present invention converges to light on the light-sensitive surface of described light activated element group by plus lens.Angular relationship is reflected by plus lens the position that the light signal of described luminous point converges on the light activated element group.For the touch pad on plane, two groups of light activated element groups with plus lens can be determined the position of luminous point.A light activated element group is determined polar coordinates relevant with angle, and two light activated element groups are determined two interlaced polar coordinates relevant with angle.By the information that comprises that two polar coordinates are determined, determine the position of luminous point.
When signal processing system obtains the position of described luminous point by the angular relationship between luminous point and light activated element group, also can analyze the difference relation of the light signal strength on light activated element in the light activated element group, to improve precision.
Touch pad can be selected the screen of display, as screen, liquid crystal display equipment screen, negative electrode display tube display (CRT) screen, the screen of light-emitting diode display, the projecting apparatus screen of projecting display; Can also select the transparent protective shield in screen the place ahead.
Light activated element when touch pad is screen in the light activated element group can be arranged on screen periphery.When screen was the screen of printing opacity, as the screen of projecting display, because the light of luminous point can penetrate screen, the light activated element in light light activated element group can be arranged on except being arranged in screen the place ahead, can also be arranged in the screen rear; Screen is that the place ahead is while being the screen of transparent medium, transparent medium such as glass, transparent plastics, the light that luminous point penetrates can be at the transparent medium internal communication around transparent medium, therefore the light activated element in the light activated element group, except being arranged in around screen the place ahead, can also be arranged in around the light transmission medium edge.
The light activated element group can arrange plus lens, also can not arrange.In the situation that plus lens is set, corresponding selection, by comprising the information of the angular relationship between luminous point and light activated element group, obtain the signal processing system of described light spot position.In the situation that plus lens is not set, corresponding selection, obtain the signal processing system of the position of described luminous point by luminous point relatively to light activated element in the light activated element group apart from the difference relation.The situation that following content keypoint does not arrange plus lens with the light activated element group is attached most importance to and is told about.
When touch pad was transparent protective shield, the light of luminous point obviously can penetrate protective shield, so the light activated element group can be arranged on the place ahead of protective shield; Also can be arranged between screen and protective shield, i.e. the back of protective shield; Can also be arranged in around the protective shield edge.According to above-mentioned project organization, the dual camera touch-screen can be made polytype dual camera touch-screen.
The principles and structure of the dual camera touch-screen that touches due to contact and the dual camera touch-screen of remote touch is basic identical, difference focuses on the generation type of described luminous point, the mode that forms luminous point comprises by contact felt pen formation luminous point, by the remote touch form of a stroke or a combination of strokes, becomes luminous point, by touching part, forms luminous point, described touch part is the object that touches touch-screen, this object can be not luminous, can be finger, pen etc.
Select contact felt pen or described touch part and dual camera touch-screen to support the use, still select remote touch pen and dual camera touch-screen to support the use, can determine directly that to a great extent this dual camera touch-screen is the dual camera touch-screen of contact touch or the dual camera touch-screen of remote touch.
The concrete structure of contact felt pen, remote touch pen is as described below.
With reference to a in Fig. 1 and b, the contact felt pen, comprise a shell 101, power supply 102, switch 103 and light-emitting component 104, light-emitting component 104 connects power supply 102 by the signal generating module 105 of the electric signal that generation is vibrated, and switch 103 is controlled the luminous situation of light-emitting component 104.Described light-emitting component 104 can be the light-emitting component of emission visible light, can be also the light-emitting component of emission invisible light.Power supply 102 also can directly connect light-emitting component 104 by switch 103.
Light-emitting component 104 adopts light emitting diode, and light emitting diode is positioned at the contact jaw of a shell 101 and touch pad, and the light emitting diode upper end props up the button of switch 103.
While using the contact felt pen, light emitting diode touches touch pad, the be under pressure button of trigger switch 103 of light emitting diode, and light-emitting component is luminous, on touch pad, forms luminous point.This luminous point is with signal generating module 105 frequency scintillation corresponding with switch 103.Switch 103 can also be obviously the switch of pressure transducer form, or the known switch of some other small size.
The contact felt pen can also be set up modifier key, as button 106.Signal generating module 105 is provided with the frequency corresponding with button 106.Push button 106, when light emitting diode touched touch pad turn on-switch 103, light-emitting component 104 was with the frequency scintillation corresponding with button 106.The dual camera touch-screen can be the right button function of clicking the mouse to the optical response signal with this frequency scintillation.In like manner, also the button corresponding to left mouse button can be set.
The contact felt pen obviously can be integrated with the radio function of existing laser pen, infrared function, as by radio function, infrared function, realized clicking the mouse right button function, the right button function of clicking the mouse and lantern slide page-turning function.
The power supply 102 of contact felt pen can be charge power supply.Shell 101 is provided with charging inlet, is convenient to the charging of contact felt pen.
When the contact felt pen is applied to portable electric appts when being applied to mobile phone, palm PC, handheld device, notebook computer etc., portable electric appts is provided with contact felt pen slot, in contact felt pen slot, be provided with charging electrode, when the contact felt pen inserts in contact felt pen slot, described charging inlet docks with charging electrode, and charge power supply is charged.
The remote touch pen is for generation of light beam, and this light beam forms luminous point on touch pad.The remote touch pen, by the Long-distance Control luminous point, is realized corresponding operated from a distance to the dual camera touch-screen.With reference to a in Fig. 2 and b, the remote touch pen comprises laser instrument 201, power supply 202, shell 203, on shell 203, has switch sections 204, the interior tool power supply 202 of shell 203, power supply 202 connects signal generating module 205, signal generating module 205 connecting lasers 201, and signal generating module 205 produces the electric signal of vibration, and drive laser 201 sends the laser signal of the flicker corresponding with electric signal, and then on the dual camera touch-screen, forms the luminous point of flicker.Laser instrument 201 can be the laser instrument of emission visible light, can be also the laser instrument of emission invisible light.
Another structure of remote touch pen, with reference to Fig. 3, laser instrument has two 301,302, laser instrument 301 emission visible lights, laser instrument 302 emission infrared rays, two light ray parallels that laser instrument 301,302 sends.Luminous ray is behaved visual feedback is provided, and Infrared has than the better anti-interference of visible light as signal vehicle.
Signal generating module can produce multiple electric signal, with switch 303 buttons, is connected, and on switch 303, has three buttons, and each button correspondence is with a kind of electric signal.Every kind of electric signal drive laser produces corresponding laser signal.
The fixed sturcture 304 that has the ring shape on the shell 300 of felt pen.By fixed sturcture 304, felt pen can be fixed on to finger upper, produce the luminous point of following finger movement.Felt pen can be worn on right hand forefinger, with thumb, control button 303.Because people's ordinary practice uses right hand forefinger refer to thing and make a gesture.The forefinger of the right hand has good sense of direction, in the design of pistol, is all utilizing this point always.
Another structure again of remote touch pen, with reference to Fig. 4, more comfortable in order to allow the people use, on shell, carry out following change, shell is provided with the fixed sturcture 401,402 of two ring shapes, between two fixed sturctures 401,402, by wire 403, connect, the ultrared laser instrument of emission is housed on fixed sturcture 401, switch 404, power supply, signal generating module, signal amplification module are housed on another fixed sturcture 402.
The fixed sturcture 401 of laser instrument is housed during use, is worn on forefinger, the fixed sturcture 402 that switch is housed is worn on middle finger, and the direction of illumination of laser instrument is towards finger tip, and the button of switch 404 is towards thumb.With the button of thumb gauge tap 404, laser instrument penetrates laser to the direction that forefinger points to.The action of forefinger drives laser action, and then handles the action of luminous point.
The remote touch pen obviously also can be integrated with the radio function of existing laser pen, infrared function, as by radio function, infrared function, realized clicking the mouse right button function, the right button function of clicking the mouse and lantern slide page-turning function.
For the present invention, the simple generation type according to luminous point, be divided into the dual camera touch-screen of contact touch and the dual camera touch-screen of remote touch by the dual camera touch-screen, is convenient to brief description, but is not easy to explain in detail.The selected touch pad of following Main Basis dissimilar, and the allocation method of described light activated element on touch pad classifyed explanation in detail.
During in the present invention take protective shield as touch pad, the mounting means of described light activated element has higher freedom, and the producing method of luminous point also has the highest freedom, therefore at first take protective shield as touch pad, sets forth.On the architecture basics and principle basis of the dual camera touch-screen take protective shield as touch pad, can obtain easily the dual camera touch-screen take other objects as touch pad in addition.Dual camera touch-screen take other objects as touch pad, the dual camera touch-screen take protective shield as touch pad is set forth as basis subsequently.
Specific embodiment one, take the protective shield of printing opacity before screen as touch pad:
The situation that following content keypoint does not arrange plus lens with the light activated element group is attached most importance to and is told about.For the situation that replaces to the light activated element group that is provided with plus lens, front is told about to some extent, no longer too in detail explanation.
The light activated element group is arranged on around touch pad.Around touch pad, comprise the place ahead, rear and the side that touch on edges of boards.Concrete, with reference to Fig. 5, the top of touch pad 501 is provided with the light activated element group 502 that the transversely arranged light activated element of a row forms, and left is provided with the light activated element group 503 of the light activated element composition of row's longitudinal arrangement.Light activated element group 502, light activated element group 503 can be arranged on touch pad 501 the place aheads, can be arranged on touch pad 501 rears, can also be embedded in advance touch pad 501 inside.
Light activated element is the narrower light activated element of applicable wavelengths scope, utilizes the selectivity of light activated element to wavelength of optical signal itself, eliminates the interference of other wavelength light signals.As selected uv-sensitive component, infrared optical sensor.
In the present embodiment, described light activated element group 502, light activated element group 503 adopt infrared optical sensor, as selected the quick diode of infrared light, infrared phototriode, light activated element integrated package, or imageing sensor.
Filter glass also can further be eliminated the interference of other wavelength light signals effectively on light activated element group 502, light activated element group 503 radiator grilles.With reference to Fig. 6, on the light activated element group, can also be provided with light-shielding structure, described light-shielding structure is penetrated next light for blocking irrelevant direction.Described irrelevant direction, refer to the dual camera touch-screen and control irrelevant direction, generally refers to except the direction towards touch pad.For above-mentioned purpose, light-shielding structure can flexible design, can be the anti-dazzling screen that simply is positioned at above or below light activated element, can be also more complicated structure.
More complicated structure adopts light-filtering channels 600 as, light-shielding structure, and the light-filtering channels 600 of being made by the poor material of light transmission on light activated element group upper cover is used for the light of directive light activated element beyond filtering touch pad 501.As light-filtering channels, can make with opaque plastic material.On light-filtering channels 600, be provided with elongated printing opacity mouth 601, light activated element group 502 is arranged in the position that certain distance is arranged apart from printing opacity mouth 601.
With reference to Fig. 5, utilize and be contained in the light activated element group 502 that transversely arranged light activated element composition is arranged in one of touch pad top, determine the horizontal ordinate of luminous point; Utilization is contained in one of touch pad left and arranges the light activated element group 503 that the light activated element of longitudinal arrangement forms, and determines the ordinate of luminous point, and then by two row's light activated elements, the position of luminous point on touch pad is determined.
The definite method of one row's light activated element to a wherein dimension coordinate of luminous point is described as follows as an example of transversely arranged light activated element group 502 example:
With reference to a in Fig. 7, light activated element serial number to transversely arranged light activated element group 502 is, light activated element 000,001,010,011,100, connect respectively frequency-selecting module 700, the output terminal of 5 frequency-selecting modules 700 connects asks differential mode piece 701, ask differential mode piece 701 to comprise 4 operational amplifiers 702, the electric signal of 5 frequency-selecting modules, 700 outputs is asked to poor successively in twos.
The electric signal that produces when the light intensity that the light activated element that microprocessor system 703 is connected take each operational amplifier 702 left sides is subject to is stronger is as " 1 ", otherwise is " 0 ", and presses precedence array data from left to right.And then the zone at luminous point place is divided into to the coordinates regional 1111,0111,0011,0001,0000 as shown in a in Fig. 8.
The raising of dual camera touch-screen resolution obviously can be achieved by increasing light activated element quantity.With reference to the figure b in Fig. 7, the raising of dual camera touch-screen resolution, can also be by increasing the quantity of operational amplifier 702, and the electric signal that again alternate light activated element group 502 is produced asks poor, so that coordinates regional is further segmented, reach the effect that improves resolution.To the coordinates regional shown in a in Fig. 8 1111,0111,0011,0001,0000, further be subdivided into the coordinates regional shown in b in Fig. 8, be followed successively by from left to right 11111,11110,01111,01110,00111,00110,00011,00010,00001,00000.
Improve dual camera touch-screen resolution, can also carry out the A/D conversion by the electrical signal intensity that each light activated element is produced, mutually relatively be achieved after being converted into numerical information.Its principle is similar to the above-mentioned principle that realizes by integrated transporting discharging, and difference is that one is to compare by hardware, and one is to compare by software.
With reference to Fig. 9, the zone that the zone that transversely arranged light activated element group 502 marks off and the light activated element group 503 of longitudinal arrangement mark off, intersect to form the coordinates regional of square shape, and the coordinates regional of each square shape represents different numerical information.When luminous point was positioned at the coordinates regional of a square shape, the dual camera touch-screen reflected the numerical information of the coordinates regional representative of the party's bulk, obtained the position of luminous point.
Said method is subject to the restriction of hardware facility, and resolution is easy to reach capacity.With reference to b in Fig. 8, set forth a kind of method of utilizing analog quantity to improve resolution.
Utilize the method for analog quantity raising resolution based on the hardware device shown in b in Fig. 8, by software, improve resolution.
Utilize software to improve the method for resolution, based on following thought: when luminous point moves on touch pad 501, its light intensity smooth change, if luminous point is when crossing over coordinates regional 11110, transversely arranged two light activated elements corresponding with coordinates regional 11110, the light intensity difference that reflects is changed to β, when laterally crossing over the coordinates regional 01111 adjacent with coordinates regional 11110, transversely arranged two light activated elements corresponding with coordinates regional 01111, the light intensity difference that reflects is changed to Ф, Ф=β+Δ, establish Δ and can ignore.
The multiplication constant of setting on an abscissa axis is n, and the horizontal ordinate length of a coordinates regional is l.When luminous point is positioned at coordinates regional 01111, take the light intensity difference of luminous point when crossing over coordinates regional 11110, change β as reference.Transversely arranged two light activated elements corresponding with coordinates regional 01111 in coordinates regional 01111, the every variation of the light intensity that reflects
Being considered as luminous point moves on horizontal ordinate
Because Δ can be ignored, by said method, coordinates regional 01111 can be divided into to n part, soon the resolution on 01111 horizontal ordinate increases n doubly.When luminous point, by coordinates regional 01111, enter adjacent coordinates regional, as coordinates regional 01110, coordinates regional 00111, take the light intensity difference of luminous point when crossing over coordinates regional 01111, change Ф as reference.Suppose that again the multiplication constant on axis of ordinates also is n, the resolution of whole dual camera touch-screen will rise to original n
2Doubly.
Be summarized as: described dual camera touch-screen comprises row's light activated element, and described row's light activated element, according to its position relationship, is divided into a plurality of coordinates regionals by touch pad; Signal processing system records described luminous point and from a former coordinates regional one, moves by side to the light intensity difference that opposite side causes and be made as β; When luminous point moves to the adjacent coordinates zone, adjacent coordinates zonal ray Strength Changes situation and β are compared, and, according to adjacent coordinates peak width and former coordinates regional width relation, determine the position of luminous point on the adjacent coordinates zone.
Carry out measurement and the calculating of above-mentioned light intensity difference, can, by first the light intensity difference being changed and is converted into numerical information by A/D, by the microprocessor system, by software, numerical information be processed according to above-mentioned formula and method.
With reference to Figure 15, for light activated element group 502 and the light activated element group 503 that the light activated element by in a row shown in Fig. 8 and Fig. 9 forms, can two light activated element group 502 and 503 replacements of light activated element group that plus lens 510, plus lens 520 are housed with the place ahead.Signal processing system, obtain the signal processing system of the position of luminous point by the angular relationship of 503 of luminous point and light activated element group 502 and light activated element groups to deserved employing.Two kinds of signal processing systems mentioning in the present invention, can comprise by judgement the information of the strength information of the electric signal relevant to luminous point that a plurality of light activated elements on the light activated element group produce, and determines the position of luminous point.Determining one or several the strongest light activated elements of associated electrical signals intensity that produce, is the key of determining light spot position.Therefore the above-mentioned summary conclusion of utilizing software to improve the method for resolution, be equally applicable to, and by the angular relationship between luminous point and light activated element group, obtains the signal processing system of the position of luminous point.When the angular relationship of signal processing system by 503 of luminous point and light activated element group 502 and light activated element groups obtains the position of luminous point, then the difference relation of the light signal strength on light activated element in the light activated element group is analyzed, helped to improve precision.Signal processing system during concrete the use, be modified to polar coordinates with reference to coordinate, then in the microprocessor system, with relevant information, carries out correspondingly the coordinate figure of correspondence, can obtain needed signal processing system.Therefore no longer describe in detail.
During use, the remote touch pen can be selected, also the contact felt pen can be selected.For the difference of two kinds of felt pens in the present invention, focus on the producing method difference of luminous point.
While adopting the contact felt pen, if touch pad 501 keeps flat on the table, while only having the tip of the brushstyle of a writing or painting of contact felt pen to contact with touch pad 501, just can produce response.This effect is suitable with the effect of writing on paper.
Following design makes the present embodiment realize operating with non-luminous touch part:
If in the present embodiment, adopt non-luminous touch part to operate, need to increase a cover dual camera touch screen light source.The light source of dual camera touch screen light source can be radiated on touch pad 501 more uniformly from touch pad 501 back sides or side.The light that light source produces penetrates from touch pad 501 the place aheads more uniformly.
Use one to touch part contact touch pad 501, touch the irradiation that part is subject to the light of light source generation, form luminous point.Touching part is the object that touches touch pad 501, can be finger, pen etc.
Luminous point move with the movement that touches part, the having or not of the movement by luminous point, luminous point, and the information realizations such as flicker frequency of luminous point touch part is to the touch operation of dual camera touch-screen.
With reference to Figure 10, light source 101a can be arranged on touch pad 501 back sides; With reference to Figure 11, light source 101b also can be arranged on touch pad 501 sides.
With reference to Figure 10, light source 101a is two strip light sources, and described strip-shaped light source can comprise the luminophor of a strip, can be also the light source of the strip that is arranged in by a plurality of little sub-light sources.Be arranged on touch pad 501 back sides, direction of illumination is for slightly towards touch pad 501 the place aheads.Light activated element group 502, light activated element group 503 are arranged on touch pad 501 back sides, and light-sensitive surface is slightly towards touch pad 501 the place aheads.Try not to make the light-sensitive surface of light activated element group 502, light activated element group 503 to be subject to the direct irradiation of light source 101a.
With reference to Figure 11, light source 101b is two strip light sources, and described strip-shaped light source can comprise the luminophor of a strip, can be also the light source of the strip that is arranged in by a plurality of little sub-light sources.Be arranged on touch pad 501 sides, be embedded in protective shield (touch pad 501) inside, direction of illumination is for slightly towards touch pad 501 the place aheads.Not shown in light activated element group 503, light activated element group 502(Figure 11) be arranged on the touch pad side, be embedded in protective shield (touch pad 501) inside, light-sensitive surface is oriented slightly towards touch pad 501 the place aheads.Try not to make the light-sensitive surface of light activated element group 502, light activated element group 503 to be subject to the direct irradiation of light source 101b.
Two strip light sources in Figure 10 and Figure 11, while penetrating light simultaneously, the light that touch pad 501 penetrates is difficult to evenly, can have influence on determining light spot position.
Solve in the following way light and be difficult to uniform problem, two strip light sources are alternately lighted, and when a strip-shaped light source was lighted, the electric signal of corresponding row's light activated element output was not received with it.What every like this row's light activated element received is all the light that just corresponding strip-shaped light source penetrates, and the light of a strip light source ejaculation is easy to be incident upon uniformly on touch pad, thereby has solved the problems referred to above.
Can also solve in the following way light and be difficult to uniform problem, article two, the strip light source is selected respectively the flicker frequency that differs larger, two corresponding row's light activated elements connect respectively the frequency-selecting module corresponding with each strip light source scintillation frequency with it, thereby have solved the problems referred to above.
With reference to Figure 10 and Figure 11, when the touch part did not touch touch pad 501, the light that light source 101a or light source 101b produce only had seldom part to shine light activated element group 502 and light activated element group 503.Owing to not forming luminous point, the light that light activated element group 502 and light activated element group 503 receive is even, and operational amplifier can not compare the obvious difference of the light that each light activated element receives, and reacts for touch event does not occur.
When the touch part touches touch pad 501, on touch pad 501, produce luminous point, the light that light source 101a or light source 101b produce is reflected back, and there is diffuse reflection in light in reflection, shine light activated element group 502 and light activated element group 503.The light that each light activated element receives is inhomogeneous, and the difference of the light that operational amplifier receives by each light activated element relatively, reflect corresponding touch event.
Potential problem that following design solves the present embodiment while adopting the larger protective shield of area to be touch pad:
With reference to Figure 12, touch pad 501 areas are when larger, and the light activated element group may not well receive the signal that is positioned on touch pad 501 luminous point everywhere.For addressing the above problem, adopt the design described in Figure 12, by at touch pad 501 surroundings dress light activated elements, a touch pad 501 is divided into to four sub-touch pad 12a, 12b, 12c, 12d.Light activated element group Unified coding by on four sub-touch pads, combine four sub-touch pads, thereby sensitivity improved.
The following security of system problem that solves the present embodiment that is designed for:
With reference to Fig. 1 b, Fig. 2, Fig. 3, Fig. 4, contact felt pen and remote touch pen all can signalization generation modules, and the electric signal that signal generating module produces is converted into to light signal sends the dual camera touch-screen to.One coding lock system is set for the dual camera touch-screen, a supporting electron key system is set for the signal generating module of contact felt pen and remote touch pen.Make to only have supporting contact felt pen and remote touch pen could operate the dual camera touch-screen, be conducive to security of system.
In order to increase the versatility of contact felt pen and remote touch pen, namely in order to make a contact felt pen or remote touch pen can operate a plurality of dual camera touch-screens, can make signal generating module comprise many group release information.Contact felt pen or remote touch pen, send and carry the light signals of organizing the release information to the dual camera touch-screen more, and wherein the release of one group of release information conforms dual camera touch-screen requires to complete release.
Described one group of release information can be included in the numerical information in carrier wave, can be also the signal with frequency oscillation and specific frequency.
Contact felt pen and remote touch pen constantly send to the dual camera touch-screen light signal that carries many group release information in use, produce luminous point.The dual camera touch-screen to carry the luminous points of luminous point as being correlated with of organizing the light signal generating of release information more.
For easy to use, many groups release information that signal generating module comprises should be convenient to the user and upgrade voluntarily.Therefore signal generating module should be provided with the function that can in good time edit release information, and this function can be by being connected realization by signal generating module with a flash memory communication.
Specific embodiment two, take the screen of projecting display as touch pad:
Referring to figs. 1 through Fig. 9, the dual camera touch-screen take the screen of projecting display as touch pad 501 with take protective shield as touch pad 501, structure and principle are basic identical.
One of different, if the screen of projecting display is not transparent medium, light can not be at the inner ordered propagation of the screen of projecting display, so be not easy to realize operating with non-luminous touch part.
Two of difference, the screen of projecting display is generally larger, for guaranteeing that the light signal that the luminous point place penetrates can be received smoothly, need to further design.
The screen of existing large screen back projection formula display generally is spliced to form by a plurality of the small screen.With reference to Figure 13, the screen of large screen back projection formula display (touch pad 501) is spliced to form by 4 the small screen 13a, 13b, 13c, 13d.Depending on the small screen 13a, 13b, 13c, 13d, be sub-touch pad, every sub-touch pad all adopts structure as shown in figure 12, every sub-touch pad is divided into to 4 little sub-touch pads again, thereby touch pad 501 is divided into to 16 sub-touch pads.
Light activated element is arranged on to the back side of the screen (touch pad 501) of large screen back projection formula display, in order to avoid affect visual effect.
Specific embodiment three, take liquid crystal display equipment screen or negative electrode display tube display (CRT) screen as touch pad:
Referring to figs. 1 through Fig. 9, and Figure 11 and Figure 12, the dual camera touch-screen is take liquid crystal display equipment screen as touch pad 501 or take negative electrode display tube display (CRT) screen as touch pad 501, and take protective shield as touch pad 501, structure and principle are basic identical.
Difference: liquid crystal display equipment screen and negative electrode display tube display (CRT) screen are with respect to the difference of protective shield, be that the light transmission between the two sides, front and back of liquid crystal display equipment screen and negative electrode display tube display (CRT) screen is bad, namely light is difficult for penetrating LCD device screen and negative electrode display tube display (CRT) screen.Light activated element group 502, the suitable ，Huo front, side that is arranged on touch pad 501 of light activated element group 503.
While making the present embodiment realize operating with non-luminous touch part, should not use structure as shown in figure 10, suitable use structure as shown in figure 11.
Specific embodiment four, take the screen of light-emitting diode display as touch pad:
Referring to figs. 1 through Fig. 9, and Figure 12, the dual camera touch-screen take the screen of light-emitting diode display as touch pad 501 with take protective shield as touch pad 501, structure and principle are basic identical.
One of different, the screen of light-emitting diode display is with respect to the difference of protective shield, is that the light transmission between the two sides, front and back of screen of light-emitting diode display is bad, and namely light is difficult for penetrating the screen of light-emitting diode display.Light activated element group 502, the suitable front that is arranged on touch pad 501 of light activated element group 503.
With reference to Figure 14, the screen of most light-emitting diode displays forms by a large amount of single led 141, and light activated element group 502, light activated element group 503 can also be arranged between a large amount of single led 141, and namely light sensor is embedded in touch pad.Due to light activated element group 502, light activated element group 503 small volumes, and transparently can not affect visual effect.Light activated element group 502, light activated element group 503 are arranged between a large amount of single led 141, are convenient to increase light activated element group 502, light activated element group 503 quantity, and then increase the degree of accuracy of dual camera touch-screen.For the ease of receiving optical signals, the height of the light-sensitive surface of light activated element group 502, light activated element group 503 should be higher than single led 141 height.
For the transparent touch pad in other the place aheads, also can adopt light activated element to be embedded in the structure of touch pad inside, as the liquid crystal display equipment screen of giant-screen, light activated element group 502, light activated element group 503 also can be embedded in the liquid crystal display equipment screen as the giant-screen of touch pad.Due to light activated element group 502, light activated element group 503 small volumes, and transparently can not affect visual effect.Such structure is compacter, stable.
Two of difference, light can not be at the inner ordered propagation of the screen of light-emitting diode display, so be not easy to realize operating with non-luminous touch part.
Specific embodiment five, take projecting apparatus screen as touch pad:
Referring to figs. 1 through Fig. 9, and Figure 12, the dual camera touch-screen take projecting apparatus screen as touch pad 501 with take protective shield as touch pad 501, structure and principle are basic identical.
Difference, projecting apparatus screen are not transparent mediums, and light can not be at the inner ordered propagation of the screen of projecting display, so be not easy to realize operating with non-luminous touch part.Light activated element group 502, suitable projecting apparatus screen the place ahead or the rear of being arranged on of light activated element group 503.
Above demonstration and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not subjected to the restriction of above-mentioned using method; that in above-mentioned using method and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. dual camera touch-screen, comprise touch pad, signal processing system, also comprise the light activated element group, described light activated element group comprises a plurality of light activated elements, a plurality of light activated elements connect signal processing system, and the light activated element in the light activated element group is connected by light with touch pad;
While using the dual camera touch-screen, on touch pad, present a relevant luminous point, light activated element is subject to the irradiation from the light of described luminous point, is reflected as relevant electric signal;
Described dual camera touch-screen comprises a plurality of light activated element groups, and described light activated element group the place ahead is provided with a plus lens; By plus lens, light is converged on the light-sensitive surface of described light activated element group.
2. dual camera touch-screen according to claim 1, it is characterized in that, the electric signal that light activated element produces is sent to signal processing system, and the electrical signal information that signal processing system produces by analyzing the light activated element group, obtain the positional information of described luminous point on touch pad; Signal processing system is processed the electric signal that produces on described light activated element group, processes in electric signal the information with distance dependent.
3. dual camera touch-screen according to claim 1, it is characterized in that, the electric signal that light activated element produces is sent to signal processing system, and the electrical signal information that signal processing system produces by analyzing the light activated element group, obtain the positional information of described luminous point on touch pad; Signal processing system is processed the electric signal that produces on described light activated element group, processes the information relevant with angle in electric signal.
4. dual camera touch-screen according to claim 1, is characterized in that, the light activated element group adopts the imageing sensor that is integrated with a large amount of light activated elements.
5. dual camera touch-screen according to claim 1, it is characterized in that, when described luminous point glimmers with certain frequency, light activated element will produce the electric signal of the vibration relevant to the optical signal frequency of luminous point, the electric signal of vibration is convenient to amplify, frequency-selecting, have better anti-interference, therefore described luminous point is selected the luminous point with the certain frequency flicker, and signal processing system comprises a frequency-selecting module corresponding with described luminous point flicker frequency.
6. dual camera touch-screen according to claim 1, is characterized in that, two groups of light activated element groups with plus lens are determined the position of luminous point; A light activated element group is determined polar coordinates relevant with angle, and two light activated element groups are determined two interlaced polar coordinates relevant with angle; By the information that comprises that two polar coordinates are determined, determine the position of luminous point.
7. dual camera touch-screen according to claim 1, it is characterized in that, when signal processing system obtains the position of described luminous point by the angular relationship between luminous point and light activated element group, also the difference relation of the light signal strength on light activated element in the light activated element group is analyzed, to improve precision.
8. the contact felt pen, is characterized in that, comprises a shell, power supply, switch and light-emitting component, and light-emitting component connects power supply by the signal generating module of the electric signal that generation is vibrated, and switch is controlled the luminous situation of light-emitting component.
9. the remote touch pen, is characterized in that, comprises laser instrument, power supply, also comprises that one is convenient to hand-held shell, and described laser instrument, power supply setting in the enclosure, are provided with switch between described laser instrument and described power supply, and described switch is arranged on described shell.
10. the felt pen system, is characterized in that, comprises a contact felt pen, it is characterized in that, comprise a shell, power supply, switch and light-emitting component, light-emitting component connects power supply by the signal generating module of the electric signal that generation is vibrated, and switch is controlled the luminous situation of light-emitting component;
Also comprise a remote touch pen, comprise laser instrument, power supply, also comprise that one is convenient to hand-held shell, described laser instrument, power supply setting in the enclosure, are provided with switch between described laser instrument and described power supply, and described switch is arranged on described shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310185667.9A CN103399671B (en) | 2009-08-17 | 2009-08-17 | Double-camera touch screen system and its felt pen |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101663237A CN101630213B (en) | 2008-08-22 | 2009-08-17 | Optical touch screen, optical touch screen light source and touch pen |
| CN201310185667.9A CN103399671B (en) | 2009-08-17 | 2009-08-17 | Double-camera touch screen system and its felt pen |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101663237A Division CN101630213B (en) | 2008-08-22 | 2009-08-17 | Optical touch screen, optical touch screen light source and touch pen |
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| CN103399671A true CN103399671A (en) | 2013-11-20 |
| CN103399671B CN103399671B (en) | 2017-11-21 |
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| CN201310185667.9A Active CN103399671B (en) | 2009-08-17 | 2009-08-17 | Double-camera touch screen system and its felt pen |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106598360A (en) * | 2016-12-20 | 2017-04-26 | 朱小菊 | Remote optical touch screen system |
| WO2018214691A1 (en) * | 2017-05-23 | 2018-11-29 | Shenzhen GOODIX Technology Co., Ltd. | Optical touch sensing for displays and other applications |
| US10437391B2 (en) | 2016-11-17 | 2019-10-08 | Shenzhen GOODIX Technology Co., Ltd. | Optical touch sensing for displays and other applications |
| CN112506361A (en) * | 2020-11-23 | 2021-03-16 | 北京建筑大学 | Man-machine interaction method and system based on light-emitting pen and double cameras |
| CN109974667B (en) * | 2017-12-27 | 2021-07-23 | 宁波方太厨具有限公司 | Indoor human body positioning method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1152291C (en) * | 2000-08-04 | 2004-06-02 | 凌阳科技股份有限公司 | Index input system composed of cameras |
| US7298367B2 (en) * | 2003-11-25 | 2007-11-20 | 3M Innovative Properties Company | Light emitting stylus and user input device using same |
| CN100498675C (en) * | 2003-12-26 | 2009-06-10 | 北京汇冠新技术有限公司 | Photoelectric detection positioning system and method for touch panel of computer |
| JP4567028B2 (en) * | 2006-09-26 | 2010-10-20 | エルジー ディスプレイ カンパニー リミテッド | Liquid crystal display device having multi-touch sensing function and driving method thereof |
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2009
- 2009-08-17 CN CN201310185667.9A patent/CN103399671B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10437391B2 (en) | 2016-11-17 | 2019-10-08 | Shenzhen GOODIX Technology Co., Ltd. | Optical touch sensing for displays and other applications |
| CN106598360A (en) * | 2016-12-20 | 2017-04-26 | 朱小菊 | Remote optical touch screen system |
| CN106598360B (en) * | 2016-12-20 | 2019-12-03 | 董群华 | Remote optical touch-screen system |
| WO2018214691A1 (en) * | 2017-05-23 | 2018-11-29 | Shenzhen GOODIX Technology Co., Ltd. | Optical touch sensing for displays and other applications |
| CN109974667B (en) * | 2017-12-27 | 2021-07-23 | 宁波方太厨具有限公司 | Indoor human body positioning method |
| CN112506361A (en) * | 2020-11-23 | 2021-03-16 | 北京建筑大学 | Man-machine interaction method and system based on light-emitting pen and double cameras |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103399671B (en) | 2017-11-21 |
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