CN102375793A - USB (universal serial bus) communication touch screen - Google Patents
USB (universal serial bus) communication touch screen Download PDFInfo
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- CN102375793A CN102375793A CN2010102517368A CN201010251736A CN102375793A CN 102375793 A CN102375793 A CN 102375793A CN 2010102517368 A CN2010102517368 A CN 2010102517368A CN 201010251736 A CN201010251736 A CN 201010251736A CN 102375793 A CN102375793 A CN 102375793A
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Abstract
The invention discloses a USB (universal serial bus) communication touch screen and relates to a touch screen. The USB communication touch screen comprises a touch sensing system and a communication system, wherein the communication system is the communication system adopting the USB communication mode, the communication system further comprises a signal conversion module for converting touch signals responded by the touch sensing system to USB communication signals, and the communication system also comprises a USB communication interface. During the specific using process, a touch point is generated on the touch screen, the touch sensing system responds out corresponding electrical signals, and the electrical signals are converted into signals which are suitable for transmission of the USB communication system through the signal conversion module for performing communication with a computer. Information received by the computer can be processed through software so as to complete the response to the touch point. The design does not need to mount an original hardware driving circuit system and has no requirements on expansibility of a mainboard of the computer.
Description
Technical field
The present invention relates to computer realm, be specifically related to a kind of touch-screen.
Background technology
Existing touch-screen and computing machine ways of connecting are connected to computer motherboard through a hardware driving Circuits System often.This just needs computing machine itself to have the position of the said hardware driving Circuits System of grafting, that is to say that existing touch-screen mostly to computer motherboard requirement to some extent, does not have extensive applicability.
Summary of the invention
The object of the present invention is to provide a kind of usb communication touch-screen, to solve the problems of the technologies described above.
For realizing that above-mentioned purpose the present invention adopts following technical scheme:
The usb communication touch-screen comprises touch-sensing system, communication system; It is characterized in that; Said communication system is for adopting the communication system of usb communication pattern; Said communication system comprises that also one is used for the touch signal of said touch-sensing system response is converted into the signal conversion module of usb communication signal, and said communication system also comprises a usb communication interface.Be connected to computing machine through said usb communication interface.
In the concrete use, when on touch-screen, producing the touch point, touch-sensing system responds out corresponding electric signal, and electric signal converts the signal that is suitable for the usb communication system transmissions into through said signal conversion module, and then communicates with computing machine.The information that computing machine receives can be handled through software, and then accomplishes the response to the touch point.This design no longer need be installed original hardware driving Circuits System, and no longer to the extendability requirement to some extent of computer motherboard.Said computing machine can be mobile phone, computer, perhaps other smart machines.
Touch-sensing system comprises an image collection disposal system, and said image collection disposal system comprises that one is used to obtain the image collecting module of touch pad place image information, and said image collecting module comprises at least two image collection devices;
At least two said image collection devices connect at least two said signal conversion module respectively, and at least two said signal conversion module are connected to a USB coupler module, draw a usb communication interface through said USB coupler module.
Through above-mentioned design at least two image collection devices are inserted computing machine through a usb communication interface.So that the simplification mode of connection.
Said at least two image collection devices lay respectively at the touch pad avris.The image collection device can be a camera.
Said touch-sensing system can also be other conventional touch-sensing systems, like infrared type, resistance-type, condenser type, ultrasonic type etc.
Said image collection device connects the image information processing module that image information that a pair of said image collection device obtains is handled, and connects said signal conversion module through said image information processing module.So that computer data is handled.
The image at least two image collection device picked-up touch pad places generates image information.Comprise coherent video in the image information, coherent video is meant the image information that the image relevant with touch operation appears.After said computing machine receives said image information; Analyze the information of coherent video, and generate relevant touch operation information, through communication system; Touch operation information is sent to the external world; As send to host computer, handset processes device system etc., and accomplish touch operation, promptly the touch operation of usb communication touch-screen is to utilize associated picture to accomplish.
Said usb communication touch-screen; Obtain respectively through said at least two image collection devices; The coherent video that includes the positional information of associated picture; The positional information of the associated picture that comprises in the coherent video that said at least two image collection devices is obtained through said computing machine is again carried out integration processing, obtains coherent video positional information accurately, and the coherent video positional information is as one of information of accomplishing touch operation.
Can know the two-dimensional coordinate information that includes imaging object in the image that the image collection device obtains by experience, contain the two-dimensional coordinate information of imaging object in the photo of breaking forth such as camera.The coherent video of the associated picture at the touch pad place that obtains with an image collection device that is arranged in the touch pad avris includes the one dimension coordinate information of associated picture position.Said at least two image collection devices; Obtain at least two coherent videos relevant with associated picture; At least two one dimension coordinate informations that comprise the associated picture position at least two coherent videos; Said computing machine obtains the information of two-dimensional coordinate at least of associated picture position through at least two one dimension coordinate informations are integrated.
In two coherent videos for two image collection devices acquisitions; Two one dimension coordinate informations that include the associated picture position; Through two one dimension coordinate informations are integrated; Can obtain the two-dimensional coordinate information of associated picture position, promptly can confirm the two-dimensional coordinate information of associated picture at the touch pad place.Still can obtain coherent video positional information accurately when therefore the image collection device being placed on the screen avris, supply to accomplish touch operation and use.
Increase image collection device number and can obtain more coherent video, help to improve the precision of associated picture positional information, help to enlarge the touch pad area.
Touch pad generally is positioned at the place ahead of screen, perhaps directly uses screen as touch pad, and the touch pad among the present invention allows not have screen independently to exist, such as can being an independently glass plate, or mural painting etc.In the above-mentioned design image collection device is placed the touch pad avris, can guarantee that the image collection device neither can take up room, and can not influence the visual effect of screen again more.In the existing image interactive technology, wherein in the projection interaction technique of widespread use, also be to adopt particularly, the mode that obtains image information through the image collection device realizes image interactive or touch operation, and what the image collection device adopted is camera.But can not camera be placed on the screen avris according to existing image interactive technology, otherwise can't obtain image position information accurately, influence work.
Said usb communication touch-screen comprises two image collection devices, is respectively the first image collection device and the second image collection device.Design can reduce when carrying out touch operation like this, and when particularly short range touched, operating personnel's health or other objects blocked the light of associated picture.
Obtain accurately that the method for image position information can be, at first utilize first image collection device to obtain the angular relationship between associated picture and said first image collection device on touch pad; Utilize second image collection device to obtain the angular relationship between associated picture and said second image collection device on the touch pad again; Computing machine is integrated the associated picture angular relationship of first image collection device acquisition and the associated picture angular relationship of second image collection device acquisition, thereby obtains the position of associated picture at the touch pad place.Said image collection device can be a camera, or other image modalities.Said angular relationship is presented as the position of coherent video on the sensitive chip of image collection device that associated picture appears.
When confirming the angular relationship between image collection device and associated picture; Allow to select various reference object; The direction of collection image that for example can select the image collection device is as first reference object, a bit is regarded as reference point with on the image collection device certain again, as second reference object.
A straight line as boost line draws to said reference point in autocorrelogram picture place, and the angle between the direction of the collection image of said boost line and said image collection device is as the angle between said image collection device and associated picture.Above content keypoint is to explain operation logic of the present invention, and irrelevant with the selection of above-mentioned reference point in the actual motion, concrete angular relationship is embodied in the position of coherent video on sensitive chip.
Touch pad can be that the front portion is the touch pad of transparent medium, and said image collection device is positioned at said transparent medium side, obtains the associated picture information in the touch pad transparent front medium.When having luminous point or other associated pictures to be presented on the transparent touch pad; The light signal of luminous point or other associated pictures not only can reflect; Also transmission can take place; And then get in the touch pad transparent front medium, and in transparent medium, propagate, can acquisition and luminous point or the relevant image information of other associated pictures from the transparent medium side.Anterior for the touch pad of transparent medium (touch pad that also comprises whole clearing naturally) can be the preceding cover plate of display, also can be indicator screen.
In the above-mentioned design; The image collection device is positioned at said transparent medium side; Obtain the inner associated picture information of transparent medium, therefore can be in same plane, even can directly be embedded in transparent medium inside with touch pad; The propagation of light signal can not receive blocking of external object, thus the image collection device that the position is set is comparatively flexible.
Because the luminous point at touch pad place or other associated pictures, and the variable in distance scope between the image collection device is bigger, thus the image collection device can be provided with one regulate said image collection device focal length automatically the focal length self-checking device so that obtain image more clearly.The focusing multiple can be used as the parameter of confirming the associated picture positional information.
The focusing lens of said image collection device adopts the liquid focusing lens, so that adjust focal length accurately, flexibly.
Said image collection device the place ahead is provided with a printing opacity mouth, and said printing opacity mouth allows the light on the plane parallel with said indicator screen at said printing opacity mouth place to get into, and weakens the light of other directions.So that confirm clearly to touch face as far as possible.Said image collection device the place ahead can also be provided with a filtering device.
Said printing opacity mouth can be the fine strip shape structure with degree of depth of being pressed from both sides by two light-shielding structures.
Said image collection device the place ahead is provided with the fender of area greater than the camera lens area.Perhaps said image collection device the place ahead is provided with the fender of area greater than said printing opacity open area.To improve the oil rub resistance ability.
The usb communication touch-screen also comprises a light source.The touch pad front portion is a transparent medium, and the light that said light source produces is radiated at the front more uniformly to be had on the touch pad of transparent medium, and to the transmission of touch pad exterior front.
Light source is radiated on the touch pad from the touch pad back side or side more uniformly, and to the transmission uniformly of the touch pad outside.Touch part with one and touch touch pad, touch the irradiation that part receives the light of light source, form luminous point.Said touch part is meant the object that touches touch pad, can be finger, pen etc.Luminous point is with touching moving of part, through the moving of luminous point, luminous point have or not and information such as the flicker frequency realization touch part of luminous point to the touch operation of usb communication touch-screen.When the touch part contacted with touch pad, the light that the image collection device of side receives was particularly strong.
The present invention and image interactive technology all need be gathered image information, and analyze, some point of crossing of technical existence.Technical measures in some image interactives can be applied to the present invention, such as technical measures such as background eliminations.The background elimination system or the background elimination software that are used to eliminate background information can be housed among the present invention.Utilize background elimination system or background to eliminate software and can eliminate background information, so that obtain coherent video information accurately.
Can know by foregoing that in addition the usb communication touch-screen among the present invention utilizes optical principle to determine the position of associated picture, and have or not greasy dirt irrelevant on the power of luminous point light intensity, the touch pad.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.Touch part in the use and do not contact, so long service life with the electron device of usb communication touch-screen itself.Touch pad can adopt the original parts of display, does not take up room.
For the situation that adopts luminous point as associated picture, can be provided with the frequency-selecting module, background is eliminated system, so it is wide not to be subject to light intensity influence, the temperature applicable range of luminous point.Be easy to the touch-screen of realizing that area is very big.
Description of drawings
Fig. 1 is the electrical block diagram of usb communication touch-screen;
Fig. 2 is the image collection device arrangement synoptic diagram of usb communication touch-screen;
Fig. 3 confirms the principle schematic of coherent video position for the usb communication touch-screen;
Fig. 4 is the structural representation of the usb communication touch-screen of band light source.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
With reference to Fig. 1, the usb communication touch-screen mainly comprises touch-sensing system, communication system.Communication system is for adopting the communication system of usb communication pattern.Communication system comprises that one is used for the touch signal of touch-sensing system response is converted into the signal conversion module of usb communication signal.Communication system also comprises a usb communication interface.Be connected to computing machine through the usb communication interface.Computing machine can be mobile phone, computer, perhaps other smart machines.
The course of work: when at first on touch-screen, producing the touch point, touch-sensing system responds out corresponding electric signal, and electric signal converts the signal that is suitable for the usb communication system transmissions into, and then communicates with computing machine through signal conversion module.The information that computing machine receives can be handled through software, and then accomplishes the response to the touch point.This design no longer need be installed original hardware driving Circuits System, and no longer to the extendability requirement to some extent of computer motherboard.
Specific embodiment 1
Touch-sensing system comprises an image collection disposal system; The image collection disposal system comprises that one is used to obtain the image collecting module of touch pad 11 place's image informations of touch-sensing system; Image collecting module comprises at least two image collection devices 2211,2212, and other image collection device shown in Fig. 1 does not indicate.What should be noted that the collection of image collection device is the image at touch pad 11 places, can be the image on touch pad 11 surfaces, but might not only be the image on touch pad 11 surfaces, even can not gather the image on touch pad 11 surfaces.
At least two image collection devices 2211,2212 connect at least two signal conversion module respectively, and at least two signal conversion module are connected to a USB coupler module, draw a usb communication interface through USB coupler module.Through above-mentioned design at least two image collection devices 2211,2212 are inserted computing machine through a usb communication interface.So that the simplification mode of connection.The image collection device can also connect the image information processing module that image information that a pair of image collection device obtains is handled, and connects signal conversion module through the image information processing module.So that computer data is handled.
The image at least two image collection device 2211,2212 picked-up touch pads 11 places generates image information.Comprise coherent video in the image information, coherent video is meant the image information that the image relevant with touch operation appears.After computing machine receives image information; Analyze the information of coherent video, and generate relevant touch operation information, through communication system; Touch operation information is sent to the external world; As send to host computer, handset processes device system etc., and accomplish touch operation, promptly the touch operation of usb communication touch-screen is to utilize associated picture to accomplish.
At least two image collection devices 2211,2212 lay respectively at touch pad 11 avris.Be positioned at the place ahead of screen as the touch pad 11, perhaps directly use screen as touch pad 11.Touch pad 11 among the present invention allows not have screen independently to exist, such as can being an independently glass plate, or mural painting etc. Image collection device 2211,2212 etc. is placed touch pad 11 avris, can guarantee image collection device 2211,2212 etc., neither can take up room more, can not influence the visual effect of screen display again.The present invention and existing image interactive compared with techniques; Equally need be with acquisition image informations such as image collection devices 2211,2212; But existing image interactive technology can not be placed on the camera as the image collection device screen (touch pad 11) avris; Otherwise can't obtain image position information accurately, and can influence work. Image collection device 2211,2212 etc. can be a camera.
But by an experience notice of invitation image collection device, include the two-dimensional coordinate information of imaging object in the image information like acquisitions such as image collection device 2211, image collection devices 2212, contain the two-dimensional coordinate information of imaging object in the photo of breaking forth such as camera.The coherent video of the associated picture at touch pad 11 places that obtain with an image collection device 2211 that is arranged in touch pad 11 avris or 2212 also includes the one dimension coordinate information of associated picture position.Be provided with at least two image collection devices 2211,2212 among the present invention; Therefore two one dimension coordinate informations that include the associated picture position in two coherent videos that obtain; Through two one dimension coordinate informations are integrated; Can obtain the two-dimensional coordinate information of associated picture position, promptly can confirm the two-dimensional coordinate information of associated picture at touch pad 11 places.Therefore still can obtain associated picture positional information accurately when image collection device 2211,2212 etc. being placed on the screen avris, supply to accomplish touch operation and use.In any case two image collection devices 2211,2212 are arranged; The probability that two one dimension coordinates of the associated picture that obtains are identical is all very little; Almost can think does not have, and therefore can not consider, needs only the coherent video that two image collection devices 2211,2212 obtain an associated picture simultaneously; Can determine the coordinate of associated picture, improper meeting causes accurate inadequately that the associated picture coordinate position confirms but two image collection devices 2211,2212 are arranged.Increase image collection device number in addition and can obtain more coherent video, help to improve the precision of associated picture positional information, also help to enlarge touch pad 11 areas.
The present technique scheme is different with existing image interactive technology, is to position through the position to associated picture such as at least two image collection devices 2211,2212.At least two image position information that image collection device 2211,2212 obtains; The positional information of the associated picture that will at least two comprises in the coherent video that obtains of image collection devices 2211,2212 through the image information processing module is again carried out integration processing; Obtain associated picture positional information accurately, with the associated picture positional information as one of information of accomplishing touch operation.
Touch-sensing system can also be other conventional touch-sensing systems, like infrared type, resistance-type, condenser type, ultrasonic type etc.
Be example with two image collection devices 2211,2212 below, the mode that obtains the coherent video positional information is detailed.
With reference to Fig. 2 and Fig. 3, the usb communication touch-screen comprises two image collection devices 2211 and 2212 etc., is respectively the first image collection device 2211 and the second image collection device 2212.The position of two image collections is not limit, and for example, the first image collection device 2211 and the second image collection device 2212 lay respectively at the upper left side and the upper right side of touch pad 11.Design can reduce when carrying out touch operation like this, and when particularly short range touched, operating personnel's health or other objects blocked the light of associated picture.
Obtain accurately that the method for image position information can be, at first utilize first image collection device 2211 to obtain the angular relationship of 2211 of touch pad 11 place's associated pictures and first image collection devices.Utilize second image collection device 2212 to obtain the angular relationship of 2212 of associated picture on the touch pads 11 and second image collection devices again.The image information processing module is integrated the associated picture angular relationship of first image collection device 2211 acquisitions and the associated picture angular relationship of the two or two image collection device 2212 acquisitions, thereby obtains the position of associated picture at touch pad 11 places.First image collection device 2211 and second image collection device 2212 can be prior camera, or other image modalities.Confirm image collection device 2211 or 2212 and associated picture between angular relationship the time; Allow to select various reference object; The direction of collection image that for example can select image collection device 2211 or 2212 is as first reference object; A bit be regarded as reference point with on the image collection device certain again, as second reference object.A straight line as boost line draws to reference point in autocorrelogram picture place, and the angle between the direction of the collection image of boost line and image collection device is as the angle between image collection device and associated picture.Above content keypoint is to explain operation logic of the present invention, and irrelevant with the selection of above-mentioned reference point in the actual motion, concrete angular relationship is embodied in the position of coherent video on sensitive chip.
Further specify the method that positional information in the coherent video is carried out integration processing with reference to Fig. 3.The index path that image collection device 2211,2212 obtains touch pad 11 place's light signals has been shown among Fig. 3.With image collection device 2211 is example, and there are associated picture a, b, c, d in touch pad 11 places.Associated picture a, b, c, d present picture point a1, b1, c1, d1 respectively on sensitive chip 32.
Can know according to the convex lens image-forming principle: touch pad 11 places are positioned at a and all can present picture point at the a1 place with relevant picture point on the a1 line; Be positioned at b and all can present picture point at the b1 place with relevant picture point on the b1 line; Be positioned at c and all can present picture point at the c1 place with relevant picture point on the c1 line, the relevant picture point on the touch pad 11 corresponds on the sensitive chip 32 by that analogy, thereby obtains the one dimension image information about touch pad 11 places.It is thus clear that embody in this one dimension image information the angular relationship between image collection device 2211 and associated picture arranged.
In like manner, associated picture a, b, c, d present picture point a2, b2, c2, d2 respectively on sensitive chip 33, and the relevant picture point on the touch pad 11 corresponds on the sensitive chip 33 by that analogy, thereby obtain the one dimension image information about touch pad 11 places.This one dimension image information embodies has the angular relationship between image collection device 2211 and associated picture.The characteristic of above-mentioned each bar line is confirmed by the optical characteristics of convex lens, is not necessarily straight line.
Visible by Fig. 3 and convex lens image-forming principle, through the picture point a2 on picture point a1 on the sensitive chip 32 and the sensitive chip 33, can confirm that associated picture is positioned at a place; Through the picture point b2 on picture point b1 on the sensitive chip 32 and the sensitive chip 33, can confirm that associated picture is positioned at the b place; Through the picture point c2 on picture point c1 on the sensitive chip 32 and the sensitive chip 33, can confirm that associated picture is positioned at the c place, by that analogy, the visible position that can confirm the associated picture at touch pad 11 places through two image collection devices 2211,2212.
Because there is a dimensioning in coherent video; The picture point that appears is not to be presented on the pixel of sensitive chip 32 probably; But be presented on a plurality of pixels, the pixel of choosing the centre in a plurality of pixels that picture point is presented on that can try one's best through software is as effective pixel.The processing of this problem has obtained solving preferably in the image interactive technology, and concrete settling mode can comparatively directly be used for reference.In order to make being presented on the less pixel that picture point tries one's best, and then reduce operand, increase light signal strength, image collection device 2211,2212 can be provided with one regulate image collection device focal length automatically the focal length self-checking device.The focusing multiple of focal length self-checking device can be used as the corrected parameter of confirming the associated picture position.Concrete modification method, the personnel that are engaged in optical research can draw formula more easily, therefore no longer detail.The focusing lens of image collection device 2211,2212 adopts the liquid focusing lens, so that adjust focal length accurately, flexibly.The place ahead of image collection device 2211,2212 is provided with a printing opacity mouth, and the printing opacity mouth allows the light on the plane parallel with indicator screen at printing opacity mouth place to get into, and weakens the light of other directions.So that confirm clearly to touch face as far as possible.The place ahead of image collection device 2211,2212 can also be provided with a filtering device.The printing opacity mouth of filtering device can be the fine strip shape structure with degree of depth of being pressed from both sides by two light-shielding structures.
Shall also be noted that image collection device 2211,2212 can obtain the one dimension image information, but might not be only to obtain the one dimension image information.The information of other dimensions that obtain also has a lot of purposes for the present invention.
Visible by technique scheme, when there was a plurality of associated picture in touch pad 11 places, each associated picture can be respectively by receptions such as image collection devices 2211,2212, and what interference each associated picture does not have basically.Therefore the present invention can well realize multi-touch.Realize multi-touch based on the present invention, focus on the software aspect, do not do detailed description.
Because in the present embodiment, as the luminous point 6 of associated picture, emphasis is presented as planar structure, and the image collection device like image collection device 2211,2212, can not adopt camera, and adopts simpler structure.With image collection device 2211 is example, comprises convex lens 31 and sensitive chip 32.Sensitive chip 32 is provided with a large amount of pixels.Pixel can be the pixel of strip, and pixel is single arrangement on sensitive chip 32.Can reduce the number of pixel like this, reduce the operand of system.
What the image collection disposal system needed is that the one dimension positional information of the picture point of luminous point 6 on sensitive chip 32 do not have direct relation with the picture point readability.Therefore image collection device 2211,2212 can dispense some image processing circuits and image processing program with respect to camera.
Image collection disposal system even can be reduced to following structure; A large amount of pixels on the sensitive chip 32; Be a large amount of photodiode structure or phototriode structures; A large amount of pixels connects a scrambler, through scrambler the signal on the pixel is encoded, and exports to the image information processing module behind the generation correlative coding.Pixel adopts photodiode structure or phototriode structure, helps to improve response speed.In order to reduce the operand of scrambler, can pixel be connected into an array structure earlier, be connected to scrambler.Based on the response speed of photodiode, phototriode, said structure allows signal frequency-selecting module to choose higher frequency-selecting frequency.
For the place ahead is the touch pad 11 of transparent medium, is suitable for the transparent medium side that image collection device 2211,2212 is arranged on touch pad 11.After luminous point 6 was presented on the touch pad 11, the light portion of luminous point 6 got into transparent medium, in transparent medium, propagates, and the image collection device 2211,2212 that is positioned at the transparent medium side receives.
The convex lens of image collection device, the convex lens 31 like image collection device 2211 are suitable for directly to be created on the transparent medium.Can reduce the proportion of goods damageds of light like this, improve the light intensity that image collection device 2211 receives.For the situation that adopts camera also is the same.
Specific embodiment 2
With reference to Fig. 4, the usb communication touch-screen also comprises a light source 91.Touch pad 11 front portions are transparent medium, and touch pad 11 is the touch pad 11 of transparent medium for the place ahead. Image collection device 2211,2212 etc. is positioned at the transparent medium side, obtains the associated picture information in the touch pad 11 transparent front media.There are luminous point 6 or other associated pictures to be presented on 11 last times of transparent touch pad; The light signal of luminous point 6 or other associated pictures not only can reflect; Also transmission can take place; And then get in the touch pad 11 transparent front media, and in transparent medium, propagate, can obtain from the transparent medium side and luminous point 6 or the relevant image information of other associated pictures.Anterior for the touch pad of transparent medium (touch pad that also comprises whole clearing naturally) can be the preceding cover plate of display, also can be indicator screen.
The light that light source 91 produces is radiated at the front more uniformly to be had on the touch pad 11 of transparent medium, and to touch pad 11 exterior front transmissions.Light source 91 is radiated on the touch pad 11 from touch pad 11 back sides or side more uniformly, and to the transmission uniformly of touch pad 11 outsides.Touch part with one and touch touch pad 11, touch the irradiation that part receives the light of light source 91, form luminous point 6.Touching part and be meant the object that touches touch pad 11, can be finger, pen etc.Luminous point 6 is with touching moving of part, through the moving of luminous point 6, luminous point 6 have or not and information such as the flicker frequency realization touch part of luminous point 6 to the touch operation of usb communication touch-screen.When the touch part contacted with touch pad 11, the light that the image collection device 2211,2212 of side etc. receives was particularly strong.
In order to improve reliability and sensitivity, light source 91 is provided with a signal generating module, and signal generating module has specific one or more oscillation frequency, and driving light source 91 sends the light signal with the certain frequency flicker.Reload signal frequency-selecting module in the image collection disposal system.The frequency-selecting frequency of signal frequency-selecting module and the oscillation frequency of signal generating module adapt.Thereby make the uncorrelated light signal of image collection disposal system filtering, improve sensitivity relative light signal.Method for the light that makes light source 91 is radiated on the touch pad 11 uniformly can be with reference to what file an application in China, and application number is the patent document of 200810035508.x.
In the above-mentioned design; Image collection device 2211,2212 etc. is positioned at the transparent medium side; Obtain the inner associated picture information of transparent medium, therefore can be in same plane, even can directly be embedded in transparent medium inside with touch pad 11; The propagation of light signal can not receive blocking of external object, thus image collection device 2211,2212 etc. that the position is set is comparatively flexible.
The present invention and image interactive technology all need be gathered image information, and analyze, some point of crossing of technical existence.Technical measures in some image interactives can be applied to the present invention, such as technical measures such as background eliminations.The background elimination system or the background elimination software that are used to eliminate background information can be housed among the present invention.Utilize background elimination system or background to eliminate software and can eliminate background information, so that obtain coherent video information accurately.
Can know by foregoing that in addition the usb communication touch-screen among the present invention utilizes optical principle to determine the position of associated picture, and have or not greasy dirt irrelevant on the power of luminous point 6 light intensity, the touch pad 11.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.The place ahead of image collection device 2211,2212 etc. is provided with the fender of area greater than the camera lens area.Perhaps the place ahead of image collection device 2211,2212 etc. is provided with the fender of area greater than the printing opacity open area.To improve the oil rub resistance ability.Touch part in the use and do not contact, so long service life with the electron device of usb communication touch-screen itself.Touch pad 11 can adopt the original parts of display, does not take up room.
For the situation that adopts luminous point 6 as associated picture, can be provided with the frequency-selecting module, background is eliminated system, so it is wide not to be subject to light intensity influence, the temperature applicable range of luminous point 6.Be easy to the touch-screen of realizing that area is very big.
For large-scale usb communication touch-screen, can use a plurality of image collection devices 2211,2212 etc., form a plurality of small-sized usb communication touch-screens, then a plurality of small-sized usb communication touch-screens are integrated into large-scale usb communication touch-screen through hardware or software.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention does not receive the restriction of above-mentioned method of application; That describes in above-mentioned method of application and the instructions just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (10)
1.USB the communication touch-screen comprises touch-sensing system, communication system; It is characterized in that; Said communication system is for adopting the communication system of usb communication pattern; Said communication system comprises that also one is used for the touch signal of said touch-sensing system response is converted into the signal conversion module of usb communication signal, and said communication system also comprises a usb communication interface.
2. usb communication touch-screen according to claim 1; It is characterized in that; Said touch-sensing system comprises an image collection disposal system; Said image collection disposal system comprises that one is used to obtain the image collecting module of touch pad place image information, and said image collecting module comprises at least two image collection devices;
At least two said image collection devices connect at least two said signal conversion module respectively, and at least two said signal conversion module are connected to a USB coupler module, draw a usb communication interface through said USB coupler module.
3. usb communication touch-screen according to claim 2 is characterized in that, said at least two image collection devices lay respectively at the touch pad avris of touch-sensing system.
4. usb communication touch-screen according to claim 3; It is characterized in that; Said image collection device connects the image information processing module that image information that a pair of said image collection device obtains is handled, and connects said signal conversion module through said image information processing module.
5. usb communication touch-screen according to claim 3 is characterized in that, said usb communication touch-screen comprises two image collection devices, is respectively the first image collection device and the second image collection device;
At first utilize first image collection device to obtain the angular relationship between associated picture and said first image collection device on the touch pad of touch-sensing system;
Utilize second image collection device to obtain the angular relationship between associated picture and said second image collection device on the touch pad of touch-sensing system again;
Computing machine is integrated the associated picture angular relationship of first image collection device acquisition and the associated picture angular relationship of second image collection device acquisition, thereby obtains the position of associated picture at the touch pad place of touch-sensing system.
6. usb communication touch-screen according to claim 3 is characterized in that, uses the touch pad of screen as touch-sensing system.
7. usb communication touch-screen according to claim 3 is characterized in that, said image collection device is provided with an automatic focal length self-checking device of regulating said image collection device focal length, and the focusing lens of said image collection device adopts the liquid focusing lens.
8. usb communication touch-screen according to claim 3; It is characterized in that; Said image collection device the place ahead is provided with a printing opacity mouth, and said printing opacity mouth allows the light on the parallel plane of the indicator screen with touch-sensing system at said printing opacity mouth place to get into, and weakens the light of other directions.
9. according to any described usb communication touch-screen in the claim 2 to 8; It is characterized in that; The usb communication touch-screen also comprises a light source; The touch pad of touch-sensing system is that the place ahead is the touch pad of transparent medium, and said image collection device is positioned at said transparent medium side, obtains the associated picture information in the touch pad transparent front medium.
10. according to any described usb communication touch-screen in the claim 2 to 8, it is characterized in that said image collection device is a camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102517368A CN102375793A (en) | 2010-08-12 | 2010-08-12 | USB (universal serial bus) communication touch screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102517368A CN102375793A (en) | 2010-08-12 | 2010-08-12 | USB (universal serial bus) communication touch screen |
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| CN102375793A true CN102375793A (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102517368A Pending CN102375793A (en) | 2010-08-12 | 2010-08-12 | USB (universal serial bus) communication touch screen |
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Application publication date: 20120314 |