CN102221942A - Touch screen using photosensitive diode chip - Google Patents
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- CN102221942A CN102221942A CN2011101909713A CN201110190971A CN102221942A CN 102221942 A CN102221942 A CN 102221942A CN 2011101909713 A CN2011101909713 A CN 2011101909713A CN 201110190971 A CN201110190971 A CN 201110190971A CN 102221942 A CN102221942 A CN 102221942A
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Abstract
The invention discloses a touch screen using a photosensitive diode chip, and relates to a touch screen. The touch screen using the photosensitive diode chip comprises a touch pad, a touch information transmitting module and an image acquisition and processing system, wherein the image acquisition and processing system comprises an image acquisition module for acquiring image information, and an image information processing module for processing the image information acquired by the image acquisition module; the image acquisition module comprises at least two image acquisition apparatuses; each image acquisition apparatus comprises a photosensitive chip, the photosensitive chip is provided with a pixel, and the pixel is in a photosensitive diode structure; and the image acquisition apparatuses are used for acquiring image information at the touch pad, and the at least two image acquisition apparatuses are positioned on the side of the touch pad. The touch screen has the advantages of stable performance, strong interference resistance, long service life and the like.
Description
The applying date of the original application that this is divided an application is: on March 6th, 2009, application number is: 200910047241.0, and name is called: optical touch screen and supporting felt pen thereof.
Technical field
The present invention relates to a kind of touch-screen, touch-screen is specially a kind of touch-screen that utilizes optical characteristics work.
Background technology
The existing touch-screen that utilizes optical characteristics to make mainly contains two kinds, and 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 laser tracking technology scanning to touch person's handwriting.
Existing infrared touch panel with respect to other touch-screens, has stable performance, series of advantages such as antijamming capability is strong, the life-span is long, precision height.Almost, capture the market of other touch-screens gradually with overwhelming advantage.
But infrared touch panel still has a fatefulue weakness to be difficult to overcome, and is exactly that infrared window is afraid of dirty.Should not use at uncleanly environment, such as not being applied in the heavier occasions of greasy dirt such as factory floor, mining area; Such as not being applied in open public arena such as train Waiting Lounge, extramural cash dispenser.Will adorn infrared correlation pipe in the screen outside in addition, have influence on the compactedness of structure, inconvenience is adopted on the small-sized screen, is used in as inconvenience 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 cooperate projector to use.The generating laser that is used 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 user's usability light pen was operated 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 needs the professional that its laser scanning is partly positioned during installation, locate inaccurate or use in move slightly and all cause maloperation easily, even can cause and can not normally use, so use occasion is very limited.
Comprehensive existing touch-screen does not also occur a kind of sensitive paper till now and opens equally the touch-screen that can allow the people lie prone and write in the above.People can't obtain original sensation of writing and convenient by touch-screen.
Summary of the invention
The object of the present invention is to provide a kind of touch-screen that adopts the photodiode chip, to solve the prior art problem.
The present invention is by the following technical solutions for achieving the above object:
Adopt the touch-screen of photodiode chip, comprise touch pad, send the touch information sending module of touch information to the external world, it is characterized in that, also comprise an image collection disposal system, described image collection disposal system comprises that one is used to obtain the image information processing module that the image collecting module of touch pad place image information and image information that a pair of image collecting module is obtained are handled;
Described image information processing module connects described touch information sending module;
Described image collecting module comprises at least two image collection devices;
Described at least two image collection devices lay respectively at described touch pad avris.The image collection device can be a video camera.
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 presents.After described image information processing module receives described image information, analyze the information of coherent video, and the relevant touch operation information of generation, by the touch information sending module, touch operation information is sent to the external world, as send to host computer, handset processes device system etc., and finish touch operation, promptly the touch operation of optical touch screen is to utilize associated picture to finish.
The touch-screen of described employing photodiode chip, obtain respectively by described 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 described at least two image collection devices is obtained by described image information processing module is carried out integration processing again, obtain coherent video positional information accurately, the coherent video positional information is as finishing one of information of touch operation.
By the two-dimensional coordinate information that includes imaging object in the experience image that the image collection device obtains as can be known, 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.Described 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, described image information processing module obtains the information of two-dimensional coordinate at least of associated picture position by 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, by two one dimension coordinate informations are integrated, can obtain the two-dimensional coordinate information of associated picture position, promptly can determine 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, use for finishing touch operation.
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 by the image collection device realizes image interactive or touch operation, and what the image collection device adopted is video camera.But video camera can not be placed on the screen avris according to existing image interactive technology, otherwise can't obtain image position information accurately, influence work.
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 described first image collection device on touch pad; Utilize second image collection device to obtain the angular relationship between associated picture and described second image collection device on the touch pad again; The image information processing module 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.Described image collection device can be a video camera, or other image modalities.Described angular relationship is presented as the position of coherent video on the sensitive chip of image collection device that associated picture presents.
When determining 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 considered as reference point with on the image collection device certain again, as second reference object.
A straight line as boost line draws to described reference point in autocorrelogram picture place, and the angle between the direction of the collection image of described boost line and described image collection device is as the angle between described image collection device and associated picture.Above content keypoint is to illustrate 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.
Adopt the touch-screen of photodiode chip, have stable performance, antijamming capability is strong, the life-span is long, cost is low, can realize remote touch, series of advantages such as the occupying volume external space not.
Because the image collection device is positioned at the screen avris, and is higher to image collection device performance requirement so the light from screen that receives is limited, is unfavorable for reducing cost.Can reduce performance requirement by adopting and the supporting felt pen of touch-screen that adopts the photodiode chip to the image collection device.
Felt pen is characterized in that, comprises a shell, power supply, switch and light-emitting component, the luminous situation of switch control light-emitting component.The luminous point that described image collection disposal system presents on touch pad with described felt pen is an associated picture.
The light signal that sends for the light-emitting component that makes felt pen is easier to be discerned by the image collection device, the image collection device adopts the image collection device that a specific band light is discerned, and the light-emitting component of felt pen adopts the light-emitting component of the corresponding specific band light of emission.Thereby the light signal that filtering is irrelevant improves sensitivity.Specific band may be selected in the 800nm-1000nm wave band, preferred 980nm.The optical element price of 980nm is lower, and antijamming capability is stronger.
In order further to improve sensitivity, can also on felt pen, install a signal generating module additional.The power supply of felt pen connects described signal generating module, and described signal generating module connects described light-emitting component.Signal generating module has specific one or more oscillation frequency and drives described light-emitting component and send light signal with certain frequency flicker.
Reload signal frequency-selecting module in the described image collection disposal system.The frequency-selecting frequency of described signal frequency-selecting module and the oscillation frequency of described signal generating module adapt.Thereby make the uncorrelated light signal of image collection disposal system filtering, improve sensitivity relative light signal.
Above-mentioned design requires felt pen to present luminous point on touch pad.Felt pen comprises the remote touch pen that presents luminous point when being convenient to present the short range felt pen of luminous point when the distance touch pad is nearer on touch pad and being convenient to apart from touch pad far.Short range felt pen and remote touch pen help respectively to realize that short range touches and remote touch.
The short range felt pen is characterized in that, comprises a shell, power supply, switch and light-emitting component, the luminous situation of switch control light-emitting component; Switch is connected with the touch end of short range felt pen, touches end trigger switch when touching touch pad, and light activated element is luminous, forms luminous point on touch pad.
The short range felt pen is luminous when contacting with touch pad, forms a luminous point on touch pad, and luminous point moves with the short range felt pen, thereby realizes the touch operation of short range felt pen to the touch-screen of employing photodiode chip by luminous point.
The remote touch pen comprises laser instrument, power supply, it is characterized in that, also has signal generating module, power supply connects signal generating module, signal generating module connects laser instrument, and signal generating module produces the electric signal of vibration, and drive laser is sent the laser signal with the corresponding flicker of electric signal.The remote touch pen is provided with switch.
The remote touch pen produces light beam, utilizes this light beam can form a luminous point on touch pad.The remote touch pen is realized the respective remote operation by the Long-distance Control luminous point to the touch-screen that adopts the photodiode chip.
The touch-screen of described employing photodiode chip comprises two image collection devices, is respectively the first image collection device and the second image collection device; The first image collection device and the second image collection device lay respectively at the upper left side and the upper right side of touch pad.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.
Described touch pad can be that the front portion is the touch pad of transparent medium, and described image collection device is positioned at described 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 enter 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 described transparent medium side, obtain the associated picture information of transparent medium inside, therefore can be in same plane with touch pad, even can directly be embedded in transparent medium inside, the propagation of light signal can not be subjected to 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, so the image collection device can be provided with a focal length self-checking device of regulating described image collection device focal length automatically, so that obtain image more clearly.The focusing multiple can be used as the parameter of determining the associated picture positional information.
Described touch pad is under the situation of front portion for the touch pad of transparent medium, allows operating personnel directly directly to carry out touch operation with hand or other touch parts, but in specifically producing and using the image collection device is had relatively high expectations, even be difficult to realization.In order to reduce requirement, adopt following design to the image collection device:
Adopt the touch-screen of photodiode chip also to comprise a light source.The touch pad front portion is a transparent medium, and the light that described 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 more uniformly from the touch pad back side or side, and to the transmission uniformly of the touch pad outside.Touch part with one and touch touch pad, touch the irradiation that part is subjected to the light of light source, form luminous point.Described touch part is meant the object that touches touch pad, can be finger, pen etc.Luminous point is with touching moving of part, by the moving of luminous point, luminous point have or not and the information such as flicker frequency of luminous point realize the touch operation of touch part to the touch-screen of employing photodiode chip.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 to gather 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.
In addition as shown in the above, the touch-screen of the employing photodiode chip among the present invention utilizes optical principle to determine the position of associated picture, and has 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 the touch-screen that adopts the photodiode chip 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.
Can have remote touch function and short range touch function simultaneously.Remote touch pen and short range felt pen, all be to communicate by the light signal of flicker and the touch-screen of employing photodiode chip, allow to give and adopt the touch-screen of photodiode chip that one coding lock system is set, a supporting electron key system is set for the signal generating module of short range felt pen and remote touch pen.The touch-screen system that adopts the photodiode chip is realized locking, prevent that the irrelevant personnel from operating.
Description of drawings
Fig. 1 is for adopting the touch screen circuitry structural representation of photodiode chip;
Fig. 2 is the image collection device arrangement synoptic diagram of the touch-screen of employing photodiode chip;
Fig. 3 determines the principle schematic of coherent video position for optical touch screen;
Fig. 4 is touch-screen that adopts the photodiode chip and the user mode synoptic diagram that touches part;
Fig. 5 is the touch screen circuitry structural drawing that has the employing photodiode chip of image interactive message processing module;
Fig. 6 is touch-screen that adopts the photodiode chip and the user mode synoptic diagram that is used for the felt pen of long-range touch;
Fig. 7 is the circuit theory synoptic diagram of remote touch pen;
Fig. 8 is a kind of opticator structural representation of image collection device;
Fig. 9 is the structural representation of short range felt pen;
Figure 10 is the structural representation of the touch-screen of the employing photodiode chip of band light source.
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.
See figures.1.and.2, adopt the touch-screen of photodiode chip, comprise touch pad 11, touch information sending module 21.Also comprise an image collection disposal system 22, image collection disposal system 22 comprises that one is used to obtain the image information processing module 222 that the image collecting module 221 of image information and image information that a pair of image collecting module 221 is obtained are handled.Image collecting module 221 comprises at least two image collection devices 2211,2212, and other image collection device shown in Fig. 1 does not indicate.Should be positioned at described touch pad avris by at least two image collection devices 2211,2212. Image collection device 2211,2212 etc. can adopt video camera.
For the ease of telling about, the system among Fig. 2 has only adopted two image collection devices 2211,2212.Two image collection devices 2211,2212 are gathered the image at touch pad 11 places, generate image information, comprise coherent video in the image information, and coherent video is meant the image information that the image relevant with touch operation presents.After image information processing module 222 receives image information, analyze the information of coherent video, and the corresponding touch operation information of generation, by touch information sending module 21, touch operation information is sent to the external world, as send to host computer, handset processes device system etc., and finish touch operation, promptly the touch operation of optical touch screen is to utilize associated picture to finish.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.
The technical program is different with existing image interactive technology, is to position by 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 by image information processing module 222 is carried out integration processing again, obtain associated picture positional information accurately, with the associated picture positional information as finishing one of information of touch operation.
By the single as can be known image collection device of experience, include the two-dimensional coordinate information of imaging object in the image information as 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 one dimension coordinate information that also includes the associated picture position with the coherent video of the associated picture at an image collection device 2211 that is arranged in touch pad 11 avris or 2212 touch pad 11 places that obtain.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, by two one dimension coordinate informations are integrated, can obtain the two-dimensional coordinate information of associated picture position, promptly can determine 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, for finishing the touch operation 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, therefore can not consider, as long as two image collection devices 2211,2212 obtain the coherent video of an associated picture simultaneously, can determine the coordinate of associated picture, improper meeting causes accurate inadequately that the associated picture coordinate position determines 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 the touch pad area.
With reference to Fig. 2 and Fig. 3, 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 11 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; Image information processing module 222 is integrated the associated picture angular relationship of first image collection device 2211 acquisitions and the associated picture angular relationship of second image collection device 2212 acquisition, 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 existing video cameras, or other image modalities.Angular relationship can be presented as, the position of the coherent video that associated picture presents on the sensitive chip 32 of image collection device.
Determine 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 considered as reference point with on the image collection device certain again, as second reference object.A straight line as boost line draws to described reference point in autocorrelogram picture place, and the angle between the direction of the collection image of described boost line and described image collection device is as the angle between described image collection device and associated picture.Above content keypoint is to illustrate 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 32.
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 image collection device 2211 comprises convex lens 31, a sensitive chip 32.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.
According to the convex lens image-forming principle as can be known: 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.As seen embody the angular relationship that has between image collection device 2211 and associated picture in this one dimension image information.
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 the angular relationship that has between image collection device 2211 and associated picture.The characteristic of above-mentioned each bar line is definite by the optical characteristics of convex lens, not necessarily straight line.
By Fig. 3 and convex lens image-forming principle as seen, by the picture point a2 on picture point a1 on the sensitive chip 32 and the sensitive chip 33, can determine that associated picture is positioned at a place; By the picture point b2 on picture point b1 on the sensitive chip 32 and the sensitive chip 33, can determine that associated picture is positioned at the b place; By the picture point c2 on picture point c1 on the sensitive chip 32 and the sensitive chip 33, can determine that associated picture is positioned at the c place, by that analogy, as seen can determine the position of the associated picture at touch pad 11 places by two image collection devices 2211,2212.
Because there is a dimensioning in coherent video, the picture point that presents 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 by 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 etc. can be provided with a focal length self-checking device of regulating described image collection device focal length automatically.The focusing multiple of focal length self-checking device can be used as the corrected parameter of determining the associated picture position.Concrete modification method, the personnel that are engaged in optical research can draw formula more easily, therefore no longer describe in detail.
Shall also be noted that image collection device 2211,2212 etc. 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.
Have technique scheme as seen, 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.
Embodiment 1
With reference to Fig. 4, image collection device 2211,2212 the one dimension image information on obtaining touch pad 11, also obtains the slightly image of touch part 5 that is used to carry out touch operation in the place aheads of touch pad 11.
With reference to Fig. 5, image collection disposal system 22 also comprises an image interactive message processing module 223, image collecting module 221 connects image interactive message processing module 223, image interactive message processing module 223 connects image information processing module 222 again, and image collection device 2211,2212 etc. adopt video camera.Image interactive message processing module 223 to be touching part 5 as associated picture, and obtains to such an extent that obtain the image interactive information relevant with touching part 5 image information from video camera.
The critical function of image interactive message processing module 223 is to determine or the identification coherent video.After handling, 223 pairs of image interactive information of image interactive message processing module pass to image information processing module 222.Naturally comprised coherent video information in the image interactive information, image processing module 222 is from the one dimension coordinate information of image interactive information acquisition associated picture.Image processing module 222 is integrated characteristic information and one or more one dimension coordinate information of coherent video again, obtains relevant touch information.Image interactive message processing module 223 can directly adopt the image interactive message processing module in the existing image interactive technology, so concrete structure no longer describes in detail.Above-mentioned design can have different responses to difform touch part 5.This design allows operating personnel except carrying out the common touch operation, is particularly suitable for using hand as touching part 5, incorporates into gesture operation.To make the present invention have abundanter mode of operation and strong functions more.
Embodiment 2
With reference to Fig. 6 and Fig. 7,, need remote touch pen 4 and be used with the touch-screen that adopts the photodiode chip in order to realize remote touch.Remote touch pen 4 comprises laser instrument 41, power supply 42, also has signal generating module 43, power supply 42 connects signal generating module 43, signal generating module 43 connects laser instrument 41, signal generating module 43 produces the electric signal of vibration, and drive laser 41 is sent the laser signal with the corresponding flicker of electric signal.Remote touch pen 4 is provided with switch 44.Remote touch pen 4 produces light beams, utilizes this light beam to form a luminous point 6 on touch pad 11, with this luminous point 6 as associated picture.Remote touch pen 4 is realized the respective remote operation by Long-distance Control luminous point 6 to the touch-screen that adopts the photodiode chip.
Luminous point 6 on the touch pad 11 is positioned on the plane in touch pad 11 the place aheads, and is different with the touch part of other entity, and the light at luminous point 6 places has only a small amount of arrival image collection device 2211,2212 places, and is received.The light signal that sends for the light-emitting component that makes remote touch pen 4 is easier to be discerned by the image collection device, image collection device 2211,2212 adopts the image collection device 2211,2212 that a specific band light is discerned, and the laser instrument 41 of remote touch pen 4 adopts the laser instrument 41 of the corresponding specific band light of emission.Thereby the light signal that filtering is irrelevant improves sensitivity.Such as the filter glass that the light that only allows the 980nm wavelength around on image collection device 2211,2212 front shrouds sees through, laser instrument 41 is selected the 980nm laser instrument for use.The optical element price of 980nm is lower, and antijamming capability is stronger.Also can select wave band at the laser instrument of 800nm-1000nm and supporting filter glass.In addition, in order to weaken even to eliminate the interference that touch pad is penetrated the light that comes outward, image collection device place installs a filter that is used to block irrelevant direction light additional.Can be for filter with reference to what file an application in China, application number is the patent document of 200810035508.x.
With reference to Fig. 7,, can also on remote touch pen 4, install a signal generating module 43 additional in order further to improve the sensitivity of system again.Signal generating module 43 has specific one or more oscillation frequency, and drive laser 41 is sent the light signal with the certain frequency flicker.Reload signal frequency-selecting module in the image collection disposal system 22.The frequency-selecting frequency of signal frequency-selecting module and the oscillation frequency of signal generating module 43 adapt.Thereby make the uncorrelated light signal of image collection disposal system 22 filterings, improve sensitivity relative light signal.
Because in the present embodiment, as the luminous point 6 of associated picture, emphasis is presented as planar structure, and the image collection device as image collection device 2211,2212, can not adopt video camera, and adopts simpler structure.With reference to Fig. 8, be example with image collection device 2211, comprise convex lens 31 and sensitive chip 32.Sensitive chip 32 is provided with a large amount of pixels 321.Pixel 321 can be the pixel of strip, and pixel 321 is single arrangement on sensitive chip 32.Can reduce the number of pixel 321 like this, reduce the operand of system.
What image collection disposal system 22 needed is that the one dimension positional information of the picture point of described luminous point 6 on sensitive chip 32 do not have direct relation with the picture point readability.Therefore image collection device 2211 can dispense some image processing circuits and image processing program with respect to video camera.
Image collection disposal system 22 even can be reduced to following structure, a large amount of pixels 321 on the described sensitive chip 32, be a large amount of photodiode structure or phototriode structures, a large amount of pixels 321 connect a scrambler, by described scrambler the signal on the pixel 321 is encoded, export to image information processing module 222 behind the generation correlative coding.Pixel 321 adopts photodiode structure or phototriode structure, helps to improve response speed.In order to reduce the operand of scrambler, pixel 321 can 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 entered transparent medium, propagates in transparent medium, and the image collection device 2211,2212 that is positioned at the transparent medium side receives.
The convex lens of image collection device as the convex lens 31 of image collection device 2211, are suitable for directly to be created on the described 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 video camera also is the same.
Embodiment 3
Image collection disposal system 22 is utilized existing image interactive technology, and is higher to the accuracy requirement of image itself during the identification associated picture, occurs phenomenons such as nonrecognition or identification error easily.Technical scheme based on the touch-screen of the employing photodiode chip among the embodiment 2 can realize the short range touch operation that recognition capability and antijamming capability are very strong.This short range touch operation needs the short range felt pen to be used.
With reference to Fig. 3 and Fig. 9, the short range felt pen comprises a shell 901, power supply 902, switch 903 and light-emitting component 904, the luminous situation of switch 903 control light-emitting components 904; Switch 903 is connected with the touch end of short range felt pen, touches end trigger switch 903 when touching touch pad, and light-emitting component 904 is luminous, forms luminous point 6 on touch pad 11.With this luminous point 6 as associated picture.The short range felt pen is luminous when contacting with touch pad 11, forms luminous point 6 on touch pad 11, and luminous point 6 moves with the short range felt pen, thereby realizes the touch operation of short range felt pen to the touch-screen of employing photodiode chip by luminous point 6.
When carrying out the short range touch, if image collection device 2211,2212 lays respectively at summary the place ahead of touch pad 11 avris, then be fit to be separately positioned on the upper left corner and the upper right corner of touch pad 11, in order to avoid operating personnel's health blocks the light arrival image collection device 221,2212 that the short range felt pen sends.
Technical scheme based on the touch-screen of the employing photodiode chip among the embodiment 2 can also realize the short range touch operation that another kind of antijamming capability is very strong.This short range touch operation does not need the short range felt pen to be used.
With reference to Fig. 3 with reference to Figure 10, adopt the touch-screen of photodiode chip also to comprise a light source 91, touch pad 11 is the touch pad 11 of transparent medium for the place ahead.The light that light source 91 sends is radiated on the touch pad 11 more uniformly, to touch pad 11 the place ahead transmissions.When touching part touch touch pad 11, be subjected to the irradiation of the light of light source 91 ejaculations, form luminous point 6.Part and 6 brightness of touch pad 11 position contacting luminous points are the strongest touching.Optical touch screen with this luminous point 6 as associated picture.Touch the mobile of part and cause moving of this luminous point 6, and then realize control optical touch screen.
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 sends the light signal with the certain frequency flicker.Reload signal frequency-selecting module in the image collection disposal system 22.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 22 filterings, improve sensitivity relative light signal.Can be for the method that the light that makes light source 91 is radiated on the touch pad 11 uniformly with reference to what file an application in China, application number is the patent document of 200810035508.x.
By above-mentioned four specific embodiments as seen, need to gather image information among the present invention, have some point of crossing with the image interactive technology.Technical measures in some image interactives can be applied to the present invention, such as technical measures such as background eliminations.
In addition as shown in the above, the touch-screen of the employing photodiode chip among the present invention utilizes optical principle to determine the position of associated picture, and has or not greasy dirt irrelevant on the power of luminous point 6 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 the touch-screen that adopts the photodiode chip itself.Touch pad 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.
Can have remote touch function and short range touch function simultaneously.Remote touch pen and short range felt pen, all be to communicate by the light signal of flicker and the touch-screen of employing photodiode chip, allow to give and adopt the touch-screen of photodiode chip that one coding lock system is set, a supporting electron key system is set for the signal generating module of short range felt pen and remote touch pen.The touch-screen system that adopts the photodiode chip is realized locking, prevent that the irrelevant personnel from operating.
Touch-screen for large-scale employing photodiode chip, can use a plurality of image collection devices 2211,2212, form the touch-screen of a plurality of small-sized employing photodiode chips, then the touch-screen of a plurality of small-sized employing photodiode chips is integrated into the touch-screen of large-scale employing photodiode chip by 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 is not subjected to the restriction of above-mentioned using method; that describes in above-mentioned using method and the instructions 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. adopt the touch-screen of photodiode chip, comprise touch pad, touch information sending module, it is characterized in that, also comprise an image collection disposal system, described image collection disposal system comprises that one is used to obtain the image information processing module that the image collecting module of image information and image information that a pair of image collecting module is obtained are handled; Image collecting module comprises at least two image collection devices, and described image collection device comprises a sensitive chip, and described sensitive chip is provided with pixel, and described pixel adopts the photodiode structure;
Described image collection device is gathered the image information at described touch pad place, and at least two described image collection devices are positioned at described touch pad avris.
2. the touch-screen of employing photodiode chip according to claim 1, it is characterized in that the coherent video of the associated picture at the touch pad place that described image collection device that is arranged in the touch pad avris obtains includes the one dimension coordinate information of associated picture position; Described 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, described image information processing module obtains the information of two-dimensional coordinate at least of associated picture position by at least two one dimension coordinate informations are integrated.
3. the touch-screen of employing photodiode chip according to claim 1 is characterized in that, when picture point was presented on a plurality of pixels of sensitive chip, the pixel of choosing the centre in a plurality of pixels that picture point is presented on was as effective pixel.
4. the touch-screen of employing photodiode chip according to claim 2 is characterized in that, the image collection device the one dimension image information on obtaining touch pad, also obtains the slightly image of touch part that is used to carry out touch operation in the place ahead of touch pad.
5. the touch-screen of employing photodiode chip according to claim 1 is characterized in that, described image collection device comprises convex lens, a sensitive chip respectively; Described image collection device is provided with an automatic focal length self-checking device of regulating described image collection device focal length; The focusing multiple of focal length self-checking device is as the corrected parameter of determining the associated picture position.
6. according to the touch-screen of any described employing photodiode chip in the claim 1 to 5, it is characterized in that, also comprise a light source, described touch pad front portion is a transparent medium, the light that described 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.
7. according to the touch-screen of any described employing photodiode chip in the claim 1 to 5, it is characterized in that, be provided with signal frequency-selecting module in the described image collection disposal system.
8. according to the touch-screen of any described employing photodiode chip in the claim 1 to 5, it is characterized in that, described touch pad front portion is a transparent medium, and described image collection device comprises convex lens, a sensitive chip respectively, and convex lens are embedded in the touch pad.
9. according to the touch-screen of any described employing photodiode chip in the claim 1 to 5, it is characterized in that adopt the touch-screen of photodiode chip also to comprise a light source, touch pad is that the place ahead is the touch pad of transparent medium; The light that light source sends is radiated on the touch pad more uniformly, to the transmission of touch pad the place ahead; Light source is provided with a signal generating module, and driving light source sends the light signal with the certain frequency flicker.
10. according to the touch-screen of any described employing photodiode chip in the claim 1 to 5, it is characterized in that, described image collection device adopts the image collection device that a specific band light is discerned, and the light-emitting component of felt pen adopts the light-emitting component of the corresponding specific band light of emission; Specific band is selected in the 800nm-1000nm wave band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101909713A CN102221942A (en) | 2009-03-06 | 2009-03-06 | Touch screen using photosensitive diode chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101909713A CN102221942A (en) | 2009-03-06 | 2009-03-06 | Touch screen using photosensitive diode chip |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2009100472410A Division CN101504580A (en) | 2009-03-06 | 2009-03-06 | Optical touch screen and its touch pen |
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| CN102221942A true CN102221942A (en) | 2011-10-19 |
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| CN2011101909713A Pending CN102221942A (en) | 2009-03-06 | 2009-03-06 | Touch screen using photosensitive diode chip |
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Application publication date: 20111019 |