CN1774692A - Touch screen signal processing - Google Patents
Touch screen signal processing Download PDFInfo
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- CN1774692A CN1774692A CNA2004800099261A CN200480009926A CN1774692A CN 1774692 A CN1774692 A CN 1774692A CN A2004800099261 A CNA2004800099261 A CN A2004800099261A CN 200480009926 A CN200480009926 A CN 200480009926A CN 1774692 A CN1774692 A CN 1774692A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
Abstract
A touch screen (1) which uses light sources (4) at one or more edges of the screen (1) which directs light across the surface of the screen (1) and at least two cameras (6) having electronic outputs located at the periphery of the screen (1) to receive light from said light sources (4). A processor receives the outputs of said cameras (6) and employs triangulation techniques to determine the location of an object proximate to said screen (1). Detecting the presence of an object includes detecting at the cameras (6) the presence or absence of direct light due to the object, using a screen surface as a mirror and detecting at the cameras (6) the presence or absence of reflected light due to an object. The light sources (4) may be modulated to provide a frequency band in the output of the cameras (6).
Description
Invention field
The present invention relates to touch sensitive display, relate in particular to by using signal Processing, the existence of optical detection object.
Technical background
The touch-screen of prior art has five kinds of principal modes.Five kinds of forms of this of touch-screen entering apparatus comprise resistance-type, condenser type, surface acoustic wave (SAW) formula, infrared (IR) formula and optical profile type.Each type of touch screens all has himself characteristic, Pros and Cons.
Resistance-type is a type the most frequently used in the touch screen technology.It is the low-cost solution of finding in many touch-screen applications, and wherein touch-screen applications comprises handheld computer, PDA, consumption electronic product and retail point application.Resistive touch screen uses the specific glassivation coating on controller and the display surface, forms to touch to connect.The main type of resistance-type coating is 4 lines, 5 lines and 8 lines.5 lines and 8 line technologies are more expensive for making and calibrating, and four lines provide lower image definition.Usually provide two selections: polishing or the anti-light of dazzling.Polishing provides picture rich in detail, dazzles light but introduce usually.The anti-light of dazzling makes and dazzles light and minimize, but also will light be dispersed, thereby reduces sharpness.A benefit using the resistance-type display is to use it by finger (wear gloves or do not wear gloves), pen, contact pilotage or hard thing.Yet, because the decline of the image definition that causes of resistive layer, with and to the susceptibility of scraping, the efficient of resistance-type display in public environment is lower.No matter at commercial how (trade-off), because relatively low price (littler screen size), and the ability of utilizing a series of input medias (finger, gloves, hard and soft contact pilotage), the resistance-type screen is the most universal technology.
Capacitive touch screen is all-glass, designs for using the type application at ATM and similar news-stand etc.Circuit is positioned at the corner of screen, and little electric weight circulates in screen, measures the people's of contact coating electric capacity.To the contact interruptive current of screen, and activate the software that moves news-stand.Because can seal glass and it is assemblied in instrument bezel on the monitor, so touch-screen is durable, and waterproof, anti-soil and dustproof.This usually uses in rigorous environment more its, as recreation, peddle that retail shows, public news-stand and commercial Application.Yet, can only activate capacitive touch screen by people's the finger and the touch of glove finger, pen, contact pilotage or hard thing are inoperative.Therefore, in many application, comprise the preparation of medical treatment and food, be not suitable for using it.
Surface acoustic wave (SAW) formula technology provides the better pictures sharpness, because it uses all-glass construction.The SAW touch-screen uses the glass displays coating.Sound wave is propagated at display surface.By the reflection along the reflector array at coating edge, each sonic propagation passes through screen.Two receivers are surveyed sound wave.When the user contacts glass surface, the sound wave of user's the certain energy of finger, controller circuitry is measured contact position.The SAW touch screen technology is used for ATM, amusement park, bank and financial application and news-stand.This technology can not fixing seal, and therefore is not suitable for many industry and commercial the application.Comparison resistance and capacitive technologies, it provides higher image definition, resolution and higher transmitance.
The infrared type technology depends on before display screen the interruption to the infrared light grid.Touch framework or light matrix framework and comprise a row's infrared LED and a phototransistor; Each is assemblied on two opposite faces, to generate sightless infrared light grid.Frame assembly comprises printed-wiring board (PWB), and wherein photoelectric device assembles in the circuit board, and the framework set is hidden in after the infrared transparent instrument bezel.Instrument bezel protection photoelectric device is avoided the influence of operating environment, allows infrared beam to pass through simultaneously.Infrared controller continuous pulsation LED produces grid of ir light beams.Work as contact pilotage, when for example finger entered grid, it had just blocked light beam.One or more phototransistors detect does not have light, and the signal of emission identification x and y coordinate.The infrared type touch-screen because they can seal fully, and uses any amount of hard or soft object to operate through being usually used in manufacturing and medical applications.The subject matter of infrared type be touch framework be slightly " seat " on screen.Therefore, before the screen, it is subject to the influence of " activating too early " in finger or contact pilotage actual contact.The cost of making the infrared glass frame also is quite high.
The optical imagery of touch-screen uses line scan camera, digital signal processing, forward direction or back to the combination of illumination and algorithm, determines the contact.By scanning along display surface, imaging len is to user's finger, contact pilotage or object image-forming.Because the shade and the light that move, the influence that this type of touch screens is subject to misread requires reading preceding touch screen simultaneously.Made and attempted going to overcome these inferior positions.Use the touch-screen of optical image technology open in following publication.
Use the touch-screen of digital environment gloss sample open in US4943806, particularly, this patent disclosure a kind of touch entering apparatus, can continue sampling and storage environment light and read information, and compare with reading of before having carried out.The effect of light and shade is minimized.
Open in US5914709 with the common touch-screen that uses of computer system.Particularly, disclose the adjustment of use threshold value and handled, to user's entering apparatus of touch-sensitive.Read light intensity value, and set up " opening " threshold value, frequently and periodically carry out this threshold measurement and adjustment.
A kind of method of U.S. Patent number 5317140 patent disclosures is used for position and direction that optics is determined object on the touch-screen display.Particularly, scatterer places on the light source, produces the average intensity on the touch-screen.
U.S. Patent number 5698845 discloses a kind of touch-screen display, uses light detection device, with the commercial AC line source frequency of twice, the ON/OFF frequency of light modulated transmitter.The light that receiver determine to exist, and with the actual signal of transmission relatively.
U.S. Patent number 4782328 discloses a kind of touch-screen, uses the optical sensor unit, places the predetermined height of touch-screen top, and when indicant during near touch-screen, and its reflection or the environment light beam that covers make its perceived arriving.
U.S. Patent number 4868551 discloses a kind of touch-screen, by surveying the light (reflection or scattering) that indicant reflects, can survey the indicant near display surface.
Summary of the invention
A target of the present invention provides a kind of touch sensitive screen, is used for overcoming described inferior position in some way, or provides useful selection to the public at least.
According to first aspect of the present invention, can think broadly to the invention reside in a kind of touch display that wherein this touch display comprises:
Allow the user touch and watch the screen of image thereon or wherein;
Light source in one or more edges of described screen, described light source guide the surface of light across described screen;
At least two cameras with output signal, described each camera is positioned at the periphery of described screen, and to the aerial image before the described screen, described output signal comprises scan image;
Handle the device of described output signal with the grade of detection light, described light comprises:
The direct sunshine that described light source sends, and/or
Light from described source reflection;
Receive the processor of the output signal that described camera processing crosses, described processor utilizes triangulation technique and the described output signal of having handled, determine whether the output signal of having handled indicates the existence near the object of described screen, and if sure, determine the position of described object.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to described camera.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to the lens center of described camera.
Be preferably described processor and determine the position of described object with the flat screen coordinate.
Be preferably described light source after described screen, be arranged for described screen is passed through in the light projection, and described display comprises, has light source at each edge, reflective optical system before described screen guides the surface of the light of described light emitted by described screen.
Being preferably described camera is line scan camera, and described camera output signal comprises the information on the scan line, and described processor uses described information to determine the position of described object.
Being preferably described touch display comprises:
Modulate the device of the described light that described light source sends, but be provided at the frequency band in the imaging scope of described camera;
The device of getting rid of the view data outside the described frequency band.
Be preferably the device that the described device that is used to handle described output signal comprises the view data outside the described frequency band of described eliminating, and the device of the view data outside the described frequency band of described eliminating comprises filter function.
Be preferably described filter function comprises that application is selected from following set wave filter, this set comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
Being preferably described touch display comprises:
Control the device of described light source; And
Obtain and handle the device of image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying light, the device of the described output signal of described processing deducts the surround lighting state from luminance.
Being preferably described light source is LED, and described touch display comprises the device of the part work of controlling described light source, and wherein this part of light source is independent of other parts of described light source.
The device that is preferably the part work of the described light source of control comprises the device of the active strength of the described light source of independent control.
The device that is preferably the part of the described light source of described control comprises the anti-phase wiring of described part, and uses bridge driver to drive.
The device that is preferably the part of the described light source of control comprises use diagonal angle bridge driver.
The device that is preferably the part of the described light source of control is included as controlled each part and uses shift register.
The device that is preferably described acquisition and handles image comprises part and described each camera of controlling described light source, and the device of the described output signal of described processing comprises process information, and it is luminous or not luminous to determine that described part illuminates.
Be preferably when receiving image, some part is luminous, and other are non-luminous.
According to second aspect of the present invention, can think broadly to the invention reside in touch display that wherein this touch display comprises:
Allow the user touch and watch the screen of image thereon or wherein;
Light source in one or more edges of described screen, described light source guide the surface of light across described screen;
At least two cameras that are positioned at described screen peripheral, have output signal are located described camera, make it not receive the direct sunshine that described light source sends, and described each camera is to the aerial image before the described screen, and described output signal comprises scan image;
Handle described output signal to survey the device of catoptrical grade; And
Receive the processor of the output signal that described camera processing crosses, described processor utilizes triangulation technique and the described output signal of having handled, determine whether the output signal of having handled indicates the existence near the object of described screen, and if sure, indicate the position of described object.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to described camera.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to the lens center of described camera.
Be preferably described processor and determine the position of described object with the flat screen coordinate.
Being preferably described touch display comprises:
Modulate the device of the described light that described light source sends, but be provided at the frequency band in the imaging scope of described camera;
The device of getting rid of the view data outside the described frequency band.
Be preferably the device that the described device that is used to handle described output signal comprises the view data outside the described frequency band of described eliminating, and the device of the view data outside the described frequency band of described eliminating comprises filter function.
Be preferably described filter function comprises that application is selected from following set wave filter, this set comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
Being preferably described touch display comprises:
Control the device of described light source; And
Obtain and handle the device of image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying light, the device of the described output signal of described processing deducts the surround lighting state from luminance.
Being preferably described light source is LED, and described touch display comprises the device of the part work of controlling described light source, and wherein this part is independent of other parts of described light source.
The device that is preferably the part work of the described light source of control comprises the device of the active strength of the described light source of independent control.
The device that is preferably the part of the described light source of control comprises the anti-phase wiring of described part, and uses bridge driver to drive.
The device that is preferably the described the Lights section of control comprises use diagonal angle bridge driver.
The device that is preferably the part of the described light source of control comprises use diagonal angle bridge driver.
The device that is preferably the part of the described light source of control is included as controlled each part and uses shift register.
The device that is preferably described acquisition and handles image comprises part and described each camera of controlling described light source, and the device of the described output signal of described processing comprises process information, determines that described part is luminous or non-luminous.
Be preferably when obtaining image, some part is luminous, and other are non-luminous.
It is reflective being preferably described screen, and described camera is further to described screen imaging, and the device of described processing output signal is surveyed the grade of light from mirror image.
Be preferably the described output signal of having handled and indicate the object of supposition with respect to the relative orientation of described camera and the distance between described object and the described screen.
According to third aspect of the present invention, can think broadly to the invention reside in the method for a kind of reception that wherein this method may further comprise the steps about the user input signal of image:
The screen that allows the user touch and watch image thereon or wherein is provided;
One or more edges at described screen provide light source, and described light source guides the surface of light by described screen;
At least two cameras with output signal are provided, and described each camera is positioned at the periphery of described screen, and to the aerial image before the described screen, described output signal comprises scan image;
Handle described output signal, survey the grade of light, described light comprises:
The direct sunshine that described light source sends, and/or
The reflected light that described light source sends;
Handle the output signal that described camera processing is crossed, utilize triangulation technique to obtain the position of described object.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to described camera.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to the lens center of described camera.
Being preferably described position is the flat screen coordinate.
Be preferably described light source after described screen, be arranged for described screen is passed through in the light projection, and described display comprises, has light source at each edge, reflective optical system before described screen guides the surface of the light of described light emitted across described screen.
Being preferably described camera is line scan camera, and described camera output signal comprises the information on the scan line, and described processor uses described information to determine the position of described object.
Be preferably and said method comprising the steps of:
Modulate the device of the described light that described light source sends, but be provided at the frequency band in the imaging scope of described camera;
The device of getting rid of the view data outside the described frequency band.
Be preferably the step of handling described output signal and comprise the step of getting rid of the view data outside the described frequency band, and the step of the view data outside the described frequency band of described eliminating comprises filtering.
Be preferably described filtering comprises the wave filter that application is selected from following set step, this set comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
Be preferably and said method comprising the steps of:
Control described light source, and
Obtain and handle image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying light, the step of the described output signal of described processing deducts the surround lighting state from luminance.
Being preferably described light source is LED, and described touch display comprises the device of the part work of controlling described light source, and wherein this part is independent of other parts of described light source.
The step that is preferably the part work of the described light source of control comprises the active strength of the described light source of independent control.
The step that is preferably the part of the described light source of described control comprises the anti-phase wiring of described part, and uses bridge driver to drive.
The step that is preferably the part of the described light source of control comprises uses the diagonal angle bridge driver.
The step that is preferably the part of the described light source of control is included as controlled each part and uses shift register.
The step that is preferably described reception and handles image comprises part and described each camera of controlling described light source, and the step of the described output signal of described processing comprises process information, determines that described part is luminous or non-luminous.
Be preferably when obtaining image, some part is luminous, and other are non-luminous.
According to the 4th aspect of the present invention, can think broadly to the invention reside in the method for a kind of reception that wherein this method may further comprise the steps about the user input signal of image:
The screen that allows the user touch and watch image thereon or wherein is provided;
One or more edges at described screen provide light source, and described light source guides the surface of light by described screen;
At least two cameras that are positioned at described screen peripheral, have output signal are provided, locate described camera, make it not receive the direct sunshine that described light source sends, to the aerial image before the described screen, described output signal comprises scan image;
Handle described output signal to survey the device of catoptrical grade; And
Handle the output signal that described camera processing is crossed, utilize triangulation technique and the described output signal of having handled, determine whether the output signal handled indicates the existence near the object of described screen, and if sure, indicate the position of described object.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to described camera.
Be preferably the described output signal of having handled and indicate the relative orientation of the object space of supposition with respect to the lens center of described camera.
Be preferably described processor and determine the position of described object with the flat screen coordinate.
Being preferably described method comprises:
Modulate the device of the described light that described light source sends, but be provided at the frequency band in the imaging scope of described camera;
The device of getting rid of the view data outside the described frequency band.
Be preferably the device that the described device that is used to handle described output signal comprises the view data outside the described frequency band of described eliminating, and the device of the view data outside the described frequency band of described eliminating comprises filtering.
Be preferably described filtering comprises that application is selected from following set wave filter, this set comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
Being preferably described method comprises:
Control the device of described light source; And
Obtain and handle the device of image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying light, the device of the described output signal of described processing deducts the surround lighting state from luminance.
Being preferably described light source is LED, and described touch display comprises the device of the part work of controlling described light source, and wherein this part is independent of other parts of described light source.
The device that is preferably the part work of the described light source of control comprises the device of the active strength of the described light source of independent control.
The device that is preferably the part of the described light source of control comprises the anti-phase wiring of described part, and uses bridge driver to drive.
The device that is preferably the part of the described light source of control comprises use diagonal angle bridge driver.
The device that is preferably the part of the described light source of control is included as controlled each part and uses shift register.
The device that is preferably described acquisition and handles image comprises the described the Lights section of control and described each camera, and the device of the described output signal of described processing comprises process information, determines that described part is luminous or non-luminous.
Be preferably when obtaining image, some part is luminous, and other are non-luminous.
It is reflective being preferably described screen, and described camera is further to described screen imaging, and the device of described processing output signal is surveyed the grade of light from mirror image.
Be preferably the described output signal of having handled and indicate the object of supposition with respect to the relative orientation of described camera and the distance between described object and the described screen.
According to the 5th aspect of the present invention, can broadly think the method for a kind of reception that the invention reside in about the user input signal of image:
At described image peripheral or near at least one light source is provided, described light source guides light by described image;
At described image peripheral or near the grade of at least two position sensing light, and provide described grade as output signal;
Utilize triangulation technique to handle described output signal, determine whether described output signal indicates the existence near the object of described image, and if sure, indicate the position of described object.
Be preferably described position and be essentially irrelative, make that described output signal indicates described reflected by objects light basically when having object.
According to the 6th aspect of the present invention, can broadly think to the invention reside in a kind ofly about user's entering apparatus image, that be used for positioning object, comprising:
At least one light source, be positioned at described image peripheral or its near, described light source guides light by described image;
At a detector place with output, described detector is positioned near described image place or its, and to the aerial image before the described screen, described output signal indicates the grade of light; Receives described output signal and use the processor of triangulation technique, and described output signal is determined the existence of described object, and if exist, indicate the position of described object.
The accompanying drawing summary
Referring now to accompanying drawing a preferred form of the present invention is described;
Fig. 1 is the picture specification of the front elevation of the preferred embodiment of touch-screen of the present invention,
Fig. 1 a is the diagram of the cross-sectional view cut open along X-X line among Fig. 1,
Fig. 1 b is the diagram of the front illumination of the preferred embodiment of touch-screen of the present invention,
Fig. 2 is the diagram of the mirror effect of the preferred embodiment of touch-screen of the present invention,
The block scheme that Fig. 2 a implements for the filtering of the preferred embodiment of touch-screen of the present invention,
Fig. 2 b is in the preferred embodiment of the present invention, by the picture specification of face camera pixel that take and that be transferred to processing module,
Fig. 3 is the system block diagram of the preferred embodiment of touch-screen of the present invention,
Fig. 4 uses image signal to determine the side view of object space in the preferred embodiment of touch-screen of the present invention,
Fig. 4 a uses image signal to determine the top view of object space in the preferred embodiment of touch-screen of the present invention,
Fig. 5 is the diagram of the calibration steps in the preferred embodiment of touch-screen of the present invention,
Fig. 6 is in the preferred embodiment of touch-screen of the present invention, in frequency domain, and the curve map of the output signal of imager in the characterization process module,
Fig. 6 a in frequency domain, characterizes the curve map of the output signal of filter response imager in the preferred embodiment of touch-screen of the present invention,
Fig. 6 b is in the preferred embodiment of touch-screen of the present invention, in frequency domain, after two types filtering, characterizes the curve map that separates of object and background,
Fig. 7 is the diagram of the front elevation of the optional embodiment of touch-screen of the present invention,
Fig. 7 a is the diagram of the cross-sectional view cut open along the X-X line among the optional embodiment of touch-screen of the present invention,
Fig. 7 b is the back diagram to illumination of the optional embodiment of touch-screen of the present invention,
Fig. 7 c is the back diagram to illumination of the induction height of the optional embodiment of control the present invention,
Fig. 7 d is among the optional embodiment of the present invention, by the picture specification of line scan camera pixel that take and that be transferred to processing module,
Fig. 8 characterizes the curve map of the simple separation of object and background among the optional embodiment of the present invention,
Fig. 9 illustrates the different driving arrangement of illumination dorsad that is used for part of the present invention,
It is backlight that Fig. 9 a illustrates among the present invention two sections of being driven by two circuits,
It is backlight that Fig. 9 b illustrates among the present invention 12 sections of being driven by four circuits, and
Fig. 9 c illustrates a distributed shift register example backlight among the present invention.
Detailed Description Of The Invention
The present invention relates in the optical imagery touch-screen field improvement to signal Processing.In a preferred embodiment, optical touch screen uses front illumination, and is made up of screen, a series of light source and at least two face scanning cameras, and wherein camera places in the same level, and places the edge of screen.In another embodiment, optical touch screen uses illumination dorsad; Screen be placed in after the touch panel array of source institute around, wherein change the direction of these light sources, make its surface across screen.In same level, use at least two line scan cameras, as touch panel.These improvement to signal Processing of implementing to be produced are can perceive object when object during closely near touch screen surface, calibrates fairly simplely, and pass through the change environment light condition, and for example mobile light or shade can not influence the perception to object.
The block scheme of conventional touch-screen system 1 is shown in Fig. 3.Information flows to video processing unit and computing machine from camera 6, is called as processing module 10 jointly.Processing module 10 is carried out the calculating of many types, comprises filtering, data sampling and triangulation, and the modulation of control light source 4.
The front illumination touch-screen
The preferred embodiment of touch-screen of the present invention is shown in Fig. 1.Touch-screen system 1 is made up of monitor 2, touch panel 3, two light sources 4, processing module (not shown) and two face scanning cameras 6 at least at least.After the monitor 2 of user's display message is positioned at touch panel 3.Under touch panel 3 and monitor 2 face scanning camera 6 and light source 4.Light source 4 is preferably light emitting diode (LED), but can be the light source of another kind of type, for example, and fluorescent tube.Because can modulate on request, so can use LED ideally, they do not have inherent inversion frequency.Camera 6 and LED 4 are positioned on the plane identical with touch panel 3.
With reference to figure 1a, the visual field 6a of face scanning camera 6 and the radiation path 4a of LED 4 are positioned at same level, and parallel with touch panel 3.When object 7, be shown as finger, when entering radiation path 4a, it is by irradiation.This is typically thought the illumination of forward direction face plate illumination or object.In Fig. 1 b, illustrate this principle once more.Enter radiation field 4a in case point 7, signal is with regard to reflected back camera 6.This shows that finger 7 is near to or in contact with arriving touch panel 3.Whether actual contact is to touch panel 3 in order to determine finger 7, must determine the position of touch panel 3.Use another signal, image signal is carried out this step.
Image signal
When object 7 produces image signal during near touch panel 3.Being preferably touch panel 3 is made by the glass with reflection characteristic.As shown in Figure 2, finger 7 is positioned at touch panel more than 3 with distance 8, and the mirror image in touch panel 3 is 7a.Camera 6 (only being shown camera lens) is to pointing 7 and reflection image 7a imaging.The image of finger 7 is reflected into 7a in panel 3; This can observe by visual field line 6b, 6c and empty visual field line 6d.This allows the reflection image 7a imaging of 6 pairs of fingers 7 of camera.The data that camera 6 produces enter the position of camera 6 corresponding to visual field line 6e, 6b.These data enter processing module 10 subsequently and are used for analyzing.
A part of processing module 10 is shown in Fig. 2 a.In processing module 10 a series of scanning imagers of realizing with software 13, and digital filter 11, and comparer 12.The pixel that has fixed qty on the touch panel, for example 30,000 pixels.These can be decomposed into 300 pixels of 100 row.Pixel quantity can be greater or less than the quantity of using, and this quantity only is used for example.In the case, have 30,000 digital filters 11 and comparer 12, assign in 300 pixels of 100 row, this forms a matrix, is similar to the matrix that the pixel on the monitor 2 forms.Fig. 2 a illustrates the expression to row, and three group 14a, 14b, 14c forming by an image analyzer 13 and digital filter 11 and comparer 12 realize that this allows to read three information in the pixel.One of this matrix has more illustrative example and is shown in Fig. 2 b.Eight pixel 3a-3h link to each other with image analyzer 13 with the cluster of row, subsequently this image analyzer and wave filter 11 link to each other with comparer 12 (as the part of processing module 10).The number that uses among Fig. 2 b only is used to illustrate; The accurate quantity of pixel can be greater than or less than this quantity.Pixel shown in the diagram can not form the shape in the panel 3, and their shape will be stipulated by the position and the type of employed camera 6.
Back with reference to figure 2, finger 7 and mirror image finger 7a activate at least two pixels; Use two pixels for easy.This illustrates by visual field line 6e and the 6b that enters processing module 10.Activated software like this, thereby two signals are by digital filter 11 and comparer 12, and cause forming digital signal output 12a-12e.Comparer 12 compares the output signal and the predetermined threshold of wave filter 11.If detect the finger of being discussed 7 at the pixel place, output signal will be higher, otherwise will be lower.
Image signal also provides finger 7 positional informations about camera 6.Can determine the height 8 of the finger 7 of panel 3 tops, and the angle position of pointing 7.The information of collecting from image signal determines that enough about the position of panel 3 where finger 7, does not need to touch panel 3 and point 7.
Fig. 4 and 4a illustrate the positional information that can obtain from image signal is handled.Positional information is given in polar coordinates.Positional information relates to finger 7 height, and points 7 position on panel 3.
Refer again to Fig. 2, can see finger 7 height that are positioned on the panel 3 in the distance between output 12a-12e.In this example, finger 7 is height 8 places on panel, and output 12b and 12e generate high signal.Other output 12a, 12d output low signal.Can find that the distance 9 between high output 12b, the 12e doubles the height 8 of finger on panel 3.
Modulation
Sampling
Filtering
In the frequency domain, the output signal of scanning imager 13 is shown in Fig. 6.In Fig. 6, there are two kinds of typical curves, when not perceiving object, a kind ofly be shown 21, when perceiving finger, a kind ofly be shown 20.In two kinds of curves,, there is the moving area of shade 22, and, has AC predominant frequency zone 23 at about 50 to 60Hz places at about 5 to 20Hz places.
In a preferred embodiment, when not having object in the visual field, do not have signal to be transferred to the face camera, therefore in output signal, do not have other peak values yet.When object is arranged in the visual field, exist corresponding to the LED modulating frequency, for example the signal 24 of 500Hz.Can remove lower unnecessary frequency 22,23 by multi-form wave filter.Filter type can comprise pectination, high pass, trap and bandpass filter.
In Fig. 6 a, the output signal of image analyzer together illustrates with a pair of different filter response 26,27 that is applied to signal 20.In simple enforcement, can carry out the comb filter 26 (if using the modulating frequency of 500Hz) of 500Hz.So only remove low-limit frequency.More senior enforcement relates to uses band logical 27 or notch filter.In the case, except hope obtained the zone of conceivable frequency, all data were removed.Be applied to the 500Hz narrow band filter 27 that modulating frequency is the signal 20 of 500Hz shown in Fig. 6 a.The output signal 30,31 of wave filter 26,27 further is shown in Fig. 6 b.The curve map of top illustrates the output signal 30 when using comb filter 26, and the curve map of below illustrates the output signal 31 when using bandpass filter 27.Bandpass filter 27 removes all unnecessary signals, away from the zone of being paid close attention to.
In case signal is filtered, and the signal in the zone of being paid close attention to is identified, and the signal that obtains is converted into digital signal by comparer, carries out triangulation to determine the physical location of object.Triangulation is known in the prior art, and is disclosed in US5534917 and US4782328, and here introduces as reference.
Calibration
The preferred embodiment of touch-screen of the present invention uses very fast and is convenient to calibration, allows touch-screen applications under any circumstance, and allows it to move to reposition, for example touch-screen is made laptop computer.Calibration relates to the touch panel 3 at three diverse location 31a, 31b, 31c, as shown in Figure 5; Defined the touch plane of touch panel 3 like this.These three contact point 31a, 31b, 31c provide enough information to the processing module (not shown), calculate position and size about the touch plane of touch panel 3.As previously mentioned, each contact point 31a, 31b, 31c use image signal and direct signal, generate the data that require.These contact points 31a, 31b, 31c can change around panel 3, and they need not to be the physical location that illustrates.
The back is to the illumination touch-screen
Fig. 7 illustrates the optional embodiment of touch-screen of the present invention.In preferred embodiment, monitor 40 is positioned at after the touch panel 41, and array of source 42 is centered around the side of panel 41 and lower edge.Outside these light point to,, and changed directions across panel 41 by diffusing panel 43 towards the user.Array of source 42 is made up of many light emitting diodes (LED).Diffusing panel 43 is used to change the direction of LED 42 emission light, and makes its diffusion and across panel 41.At least two line scan cameras 44 are positioned at two turnings, top of panel 3, and can be to object image-forming.Camera 44 selectively is positioned at any position of panel 41 circumferential perimeter.Around the periphery of touch panel 41, be instrument bezel 45 or shell.Instrument bezel 45 prevents that as framework illuminated transmittance is to external environment condition.Instrument bezel 45 is gone into camera 44 with beam reflection, makes that light signal can read in camera 44 when not having object near touch panel 41.
Selectively, array of source 42 can be replaced by cold-cathode tube.When using cold-cathode tube, unnecessary with the outer tube of diffusing panel 43 as the cathode tube of diffused ray.Cold-cathode tube is arranged in along on the total length of a side of panel 41.This is provided at basic light intensity uniformly on the surface of panel 41.Not being preferably to use cold-cathode tube, because for the concrete length of they being made amendment with each side of adapting to panel 41, is difficulty and expensive.Use LED allows in the size of panel 41 and greater flexibility is arranged in shape.
When array of source 42 is made up of many LED, use diffusing panel 43.Diffusing panel 43 is used for the light of diffusion LED emission, and changes its direction to the surface of panel 41.Shown in Fig. 7 a, the light 47 of LED 42 emissions begins its path at the place, right angle of panel 41.In case it shines diffusing panel 43, just change direction, be parallel to panel 41.Light 47 is propagated above omiting on the surface of panel 41, with irradiation panel 41.As previously mentioned, by calibration of processing module (not shown) and light modulated 47.
With reference to figure 7a, the width 46 that increases instrument bezel 45 can increase or reduce.The width 46 that increases instrument bezel 45 can increase the distance that object can perceivedly arrive.Similarly, opposite situation just is used to reduce the width 10 of instrument bezel 45.
With reference to figure 7b and 7c, when not using touch-screen, just, when reciprocation that does not have the user or input, all light of array of source 42 emissions all are transferred to line scan camera 44.When existing the user to import, just, the user is by the finger contact screen with them, when selecting something on screen; The light that a part is transferred to camera 44 just is interrupted.By utilizing triangulation algorithm that the output data of camera 44 is calculated, can determine active position.
In optional embodiment, because instrument bezel surrounds touch panel, line scan camera will continue to read the light modulated that LED transmits.No matter this will cause all modulating frequency can occurring when when not having object to interrupt light path in the output signal.When object interrupts light path, the modulating frequency in the output signal will can not occur.This shows that object is approaching or touches touch panel.The frequency height that appears in the output signal is the twice (twice amplitude) of the frequency height in the preferred embodiment.This is owing to two groups of signals (direct and mirror image) once occurred.
In other optional embodiment, shown in Figure 8, when connection of modulating LED and cut-out, the output signal of sampling camera.This provides and reads 50 to what surround lighting added back illumination, and separately surround lighting is read 51.When object interrupts the light time that LED sends, in output signal 50, exist and sink 52.When surround lighting changes very greatly, be difficult to observe and less sink 52.For this reason, read from surround lighting and back illumination and deduct surround lighting 50 and read 51.This causes occurring observing sagging 52 output signal 54, sink 52 thereby can use simple threshold value to discern.
Carrying out the calibration of optional embodiment with the same way as of describing before, but contact point 31a, 31b, 31c (with reference to figure 5) can not be on a line, and they must be dispersed in the surface of panel 3.
In Fig. 7, back illumination is broken down into many independent parts, 42a to 42f.The subclass of part or part at any time activates.The subset of pixels of imageing sensor 44 is to each part imaging.Contrast utilizes the system of single back illumination control, the back illumination transmitter in shorter time with higher current work.Because the average power of restriction transmitter has increased peak brightness.The peak brightness that increases has improved the performance of surround lighting.
Can advantageously arrange the conversion of back illumination, make when part of irradiation, can measure the ambient light level of another part by signal processor.By while measure ambient light and back illumination part, improved the speed of single back light system.
Adjust back illumination brightness adaptively by control LED electric current or pulse width, activate each part, so that when using minimum average B configuration power, for the pixel of checking this part, holding signal and noise add the constant ratio of surround lighting.
Realize in one from a plurality of methods controlling a plurality of parts with the control line of minimum number.
In first of two parts back illumination was implemented, two groups of diode 44a, 44b can anti-phase wirings and are driven by bridge driver.
In second enforcement that has more than two parts, use the diagonal angle bridge driver.In Fig. 9 b, 4 lines can be selected in 12 parts, and 5 lines can drive 20 parts, and 6 lines can drive 30 parts.
Implement among the 9c the 3rd, for a large amount of parts, shift register 60 physical distribution and are only required two control lines around back illumination.
In this area, it is well-known that the X-Y multichannel is arranged.For example the 8+4 line is used to control 4 demonstrations of 32 LED.Fig. 9 b illustrates the 4 line diagonal angle multichannels of 12 LED and arranges.Control line A, B, C, D are by ternary output signal, and for example the signal that can obtain in the pin such as microprocessors such as MicrochipPIC series usually drives.Each ternary output signal has two electronic switches, is generally field effect transistor.Can connect a switch or two switches all can not be connected.For starting LED L1a, can only use switch A1 and B0.For starting L1B, operation A 0 and B1.For starting L2a, use switch A1 and D0, or the like.This arrangement can be used jointly with any amount of control line, but is particularly conducive to the situation of 4,5,6 control lines, wherein can control 12,20,30 LED, keeps the track of printed-wiring board (PWB) fairly simple simultaneously.Using higher place of controlling the size, it is more favourable using the form of degenerating, and has wherein omitted some LED that may exist, and alleviates actual interconnected difficulty.
The diagonal angle multiloop loop system has following properties:
-help existing the situation of 4 or more control lines
-require that every control line is carried out three-state to recommend driving
-be better than using the x-y of LED control line to arrange in the point of crossing, this arrangement shows as control line and is arranged on the loop that a pair of anti-phase LED on each group diagonal angle between the control line forms.Each LED can be selected uniquely, also specific combination can be selected.
The minimum line number that-use is possible
-need on line to use under the situation of emc filtering, obviously saved element
For those technician that relate to field of the present invention, also have the many changes to structure, little identical embodiment and application not to deviate from the invention scope that in additional claims, defines among the present invention.Disclosure herein and description are illustrative purely, and are not used in any restriction to understanding.
Claims (71)
1. touch display comprises:
Allow the user thereon or by its touch and check the screen of image;
Light source in one or more edges of described screen, described light source guide the surface of light across described screen;
At least two cameras with output, each described camera is positioned at the periphery of described screen, and to the aerial image before the described screen, described output comprises the image of scanning;
Handle the device of described output, to survey the grade of light, described light comprises:
From the direct sunshine of described light source, and/or
Reflected light from described light source;
Receive the processor of the output that described camera handled, described processor utilizes triangulation technique and the described output of having handled, determining whether this output of having handled was represented to have near the existing of the object of described screen, and if sure, represent the position of described object.
2. touch display according to claim 1, the wherein said output of having handled are represented the object space the supposed relative orientation with respect to described camera.
3. touch display according to claim 1 and 2, the wherein said output of having handled are represented the object space the supposed relative orientation with respect to the lens center of described camera.
4. according to any one described touch display in the claim 1 to 3, wherein said processor is determined the position of described object with the flat screen coordinate.
5. according to any one described touch display in the claim 1 to 4, wherein said light source is after described screen, be set to the light projection by described screen, and described display comprises, the light source that has at each edge, reflective optical system before described screen guides the surface of the light of described light emitted across described screen.
6. according to any one described touch display in the claim 1 to 5, wherein said camera is a line scan camera, and described camera output comprises the information on the sweep trace, and described processor uses described information to determine the position of described object.
7. according to any one described touch display in the claim 1 to 6, comprising:
Modulate the device of the described light that described light source sends, but with the frequency band in the imaging scope that is provided at described camera;
The device of getting rid of the view data outside the described frequency band.
8. touch display according to claim 7, the wherein said device that is used to handle described output comprises the device of the view data outside the described frequency band of described eliminating, and the device of the view data outside the described frequency band of described eliminating comprises filtering.
9. touch display according to claim 8, wherein filtering comprises the wave filter that application is selected from following group, this group comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
10. according to any one described touch display in the claim 1 to 9, comprising:
Control the device of described light source; And
Obtain and handle the device of image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying described light, the device of the described output of described processing deducts this ambient condition from this luminance.
11. according to any one described touch display in the claim 1 to 10, wherein said light source is LED, and described touch display comprises the device of the part work of controlling described light source, this part of wherein being controlled is independent of other parts of described light source.
12. touch display according to claim 11, the device of wherein controlling the part work of described light source comprises the device of the active strength of the described light source of independent control.
13. according to claim 11 or 12 described touch displays, the device of the described the Lights section of wherein said control comprises described part is oppositely connected up, and uses bridge driver to drive.
14. according to claim 11 or the described touch display of claim 12, the device of the described the Lights section of wherein said control comprises use diagonal angle bridge driver.
15. according to claim 11 or the described touch display of claim 12, the device of the described the Lights section of wherein said control is included as controlled each part and uses shift register.
16. according to any one described touch display in the claim 11 to 15, the device of wherein said acquisition and processing image comprises the described the Lights section of control and described each camera, and the device of the described output of described processing comprises that processing is luminous or non-luminous information about described part.
17. touch display according to claim 16, wherein when obtaining image, some part is luminous, and other are non-luminous.
18. a touch display comprises:
Allow the user thereon or by its touch and watch the screen of image;
Light source in one or more edges of described screen, described light source guide the surface of light across described screen;
At least two cameras that are positioned at described screen peripheral, have output are configured such that with described camera it does not receive the direct sunshine that described light source sends, and described each camera is to the aerial image before the described screen, and described output comprises the image of scanning;
Handle the device of described output, to survey catoptrical grade; And
Receive the processor of the output that described camera handled, described processor utilizes triangulation technique and the described output of having handled, whether represent to have near the existing of the object of described screen with the output of determining to have handled, and if sure, represent the position of described object.
19. touch display according to claim 18, the wherein said output of having handled are represented the object space the supposed relative orientation with respect to described camera.
20. according to claim 18 or 19 described touch displays, the object space the supposed relative orientation with respect to the lens center of described camera is represented in the wherein said output of having handled.
21. according to any one described touch display in the claim 18 to 20, wherein said processor is determined the position of described object with the flat screen coordinate.
22., comprising according to any one described touch display in the claim 18 to 21:
Modulate the device of the described light that described light source sends, but with the frequency band in the imaging scope that is provided at described camera;
The device of getting rid of the view data outside the described frequency band.
23. touch display according to claim 22, the wherein said device that is used to handle described output comprises the device of the view data outside the described frequency band of described eliminating, and the device of the view data outside the described frequency band of described eliminating comprises filtering.
24. touch display according to claim 23, wherein said filtering comprises the wave filter that application is selected from following group, and this group comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
25., comprising according to any one described touch display in the claim 18 to 24:
Control the device of described light source; And
Obtain and handle the device of image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying this light, the device of the described output of described processing deducts this surround lighting state from this luminance.
26. according to any one described touch display in the claim 18 to 25, wherein said light source is LED, and described touch display comprises the device of the part work of controlling described light source, this part of wherein being controlled is independent of other parts of described light source.
27. touch display according to claim 26, the device of wherein controlling the part work of described light source comprises the device of the active strength of the described light source of independent control.
28. according to claim 26 or 27 described touch displays, the device of wherein controlling the part of described light source comprises described part is oppositely connected up, and uses bridge driver to drive.
29. according to claim 26 or 27 described touch displays, the device of wherein controlling the part of described light source comprises use diagonal angle bridge driver.
30. according to claim 26 or 27 described touch displays, the device of the part of the described light source of wherein said control is included as controlled each part and uses shift register.
31. according to any one described touch display in the claim 26 to 30, the device of wherein said acquisition and processing image comprises part and described each camera of controlling described light source, and the device of the described output of described processing comprises that processing is luminous or non-luminous information about described part.
32. touch display according to claim 31, when wherein obtaining image, some part is luminous, and other are non-luminous.
33. according to any one described touch display in the claim 18 to 31, wherein said screen is reflective, described camera is further to described screen imaging, and the device of described processing output is surveyed the grade of this light from mirror image.
34. the object that touch display according to claim 33, the wherein said output of having handled are represented to suppose is with respect to the relative orientation of described camera and the distance between described object and the described screen.
35. the method about the reception user input of image may further comprise the steps:
Provide and allow the user thereon or by its touch and watch the screen of image;
One or more edges at described screen provide light source, and described light source guides the surface of light across described screen;
At least two cameras with output are provided, and described each camera is positioned at the periphery of described screen, and to the aerial image before the described screen, described output comprises the image of scanning;
Handle described output, to survey the grade of light, described light comprises:
From the direct sunshine of described light source, and/or
Reflected light from described light source;
Handle the output that described camera has been handled, utilize triangulation technique to obtain the position of described object.
36. the method for the reception user input about image according to claim 35, the wherein said output of having handled are represented the object space the supposed relative orientation with respect to described camera.
37. according to the method for the described reception user input about image of claim 35 or claim 36, the object space the supposed relative orientation with respect to the lens center of described camera is represented in the wherein said output of having handled.
38. according to any one described method of importing about the reception user of image in the claim 35 to 37, wherein said position is the flat screen coordinate.
39. according to any one described method of importing about the reception user of image in the claim 35 to 38, wherein said light source is after described screen, be set to the light projection by described screen, and described display comprises, the light source that has at each edge, reflective optical system before described screen guides the surface of the light of described light emitted across described screen.
40. according to any one described method of importing about the reception user of image in the claim 35 to 39, wherein said camera is a line scan camera, described camera output comprises the information on the sweep trace, and described processor uses described information to determine the position of described object.
41., may further comprise the steps according to any one described method of importing about the reception user of image in the claim 35 to 40:
Modulate the described light that described light source sends, but with the frequency band in the imaging scope that is provided at described camera;
Get rid of the view data outside the described frequency band.
42. according to the described method of importing about the reception user of image of claim 41, the step of wherein handling described output comprises the step of getting rid of the view data outside the described frequency band, and the step of the view data outside the described frequency band of described eliminating comprises filtering.
43. according to the described method of importing about the reception user of image of claim 42, wherein filtering comprises the step of the wave filter that application is selected from following group, this group comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
44., may further comprise the steps according to any one described method of importing about the reception user of image in the claim 35 to 43:
Control described light source; And
Obtain and handle image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying this light, the step of the described output of described processing deducts this ambient condition from this luminance.
45. according to any one described method of importing about the reception user of image in the claim 35 to 44, wherein said light source is LED, and described touch display comprises the device of the part work of controlling described light source, and this part of wherein being controlled is independent of other parts of described light source.
46. according to the described method of importing about the reception user of image of claim 45, the step of wherein controlling the part work of described light source comprises the active strength of the described light source of independent control.
47. according to the methods of claim 45 or 46 described reception user inputs about image, the step of the part of the described light source of wherein said control comprises described part is oppositely connected up, and uses bridge driver to drive.
48. according to claim 45 or the 46 described methods of importing about the reception user of image, the step of wherein controlling the part of described light source comprises uses the diagonal angle bridge driver.
49. according to claim 45 or the 46 described methods of importing about the reception user of image, the step of wherein controlling the part of described light source is included as controlled each part and uses shift register.
50. according to any one described method of importing about the reception user of image in the claim 45 to 49, the step that wherein obtains and handle image comprises part and described each camera of controlling described light source, and the step of the described output of described processing comprises that processing is luminous or non-luminous information about described part.
51. according to the described method of importing about the reception user of image of claim 50, when wherein obtaining image, some part is luminous, and other are non-luminous.
52. the method about the reception user input of image may further comprise the steps:
Provide and allow the user thereon or by its touch and watch the screen of image;
One or more edges at described screen provide light source, and described light source guides the surface of light across described screen;
At least two cameras that are positioned at described screen peripheral, have output are provided, described camera is arranged so that it does not receive the direct sunshine that described light source sends, each described camera is to the aerial image before the described screen, and described output comprises the image of scanning;
Handle the device of described output, to survey catoptrical grade; And
Handle the output that described camera has been handled, utilize triangulation technique and the described output of having handled, whether represent to have near the existing of the object of described screen, and if sure, represent the position of described object to determine this output of having handled.
53. according to the method for the described reception user input about image of claim 52, the object space the supposed relative orientation with respect to described camera is represented in the wherein said output of having handled.
54. according to the method for the described reception user input about image of claim 52 or claim 53, the object space the supposed relative orientation with respect to the lens center of described camera is represented in the wherein said output of having handled.
55. according to any one described method of importing about the reception user of image in the claim 52 to 54, wherein said processor is determined the position of described object with the flat screen coordinate.
56. comprise according to any one described method of importing about the reception user of image in the claim 52 to 55:
Modulate the device of the described light that described light source sends, but with the frequency band in the imaging scope that is provided at described camera;
The device of getting rid of the view data outside the described frequency band.
57. according to the described method of importing about the reception user of image of claim 56, the wherein said device that is used to handle described output comprises the device of the view data outside the described frequency band of described eliminating, and the device of the view data outside the described frequency band of described eliminating comprises filtering.
58. according to the described method of importing about the reception user of image of claim 57, wherein filtering comprises the wave filter that application is selected from following group, this group comprises:
Comb filter;
Hi-pass filter;
Notch filter; And
Bandpass filter.
59. comprise according to any one described method of importing about the reception user of image in the claim 52 to 58:
Control the device of described light source; And
Obtain and handle the device of image, wherein this image obtains at non-luminous surround lighting state and luminance;
Wherein before the grade of surveying this light, the device of the described output of described processing deducts this ambient condition from this luminance.
60. according to any one described method of importing about the reception user of image in the claim 52 to 59, wherein said light source is LED, and described touch display comprises the device of the part work of controlling described light source, and this part of wherein being controlled is independent of other parts of described light source.
61. according to the described method of importing about the reception user of image of claim 60, the device of wherein controlling the part work of described light source comprises the device of the active strength of the described light source of independent control.
62. according to the method for the described reception user input about image of claim 60 or claim 61, the device of wherein controlling the part of described light source comprises described part is oppositely connected up, and uses bridge driver to drive.
63. according to claim 60 or the described method of importing about the reception user of image of claim 61, the device of wherein controlling the part of described light source comprises use diagonal angle bridge driver.
64. according to claim 60 or the described method of importing about the reception user of image of claim 61, the device of the part of the described light source of wherein said control is included as controlled each part and uses shift register.
65. according to any one described method of importing about the reception user of image in the claim 60 to 64, the device of wherein said acquisition and processing image comprises part and described each camera of controlling described light source, and the device of the described output of described processing comprises that processing is luminous or non-luminous information about described part.
66. according to the described method of importing about the reception user of image of claim 60, wherein when obtaining image, some part is luminous, and other are non-luminous.
67. according to any one described method of importing about the reception user of image in the claim 52 to 65, wherein said screen is reflective, described camera is further to described screen imaging, and the device of described processing output is surveyed the grade of this light from mirror image.
68. according to the described method of importing about the reception user of image of claim 67, the object that the wherein said output of having handled is represented to suppose is with respect to the relative orientation of described camera and the distance between described object and the described screen.
69. method about the reception user input of image:
At described image peripheral or near at least one light source is provided, described light source guides light across described image;
At described image peripheral or near the grade of at least two these light of position sensing, and provide described grade as output;
Utilize triangulation technique to handle described output, whether represent near the existing of the object of described image, and if sure, represent the position of described object to determine described output.
70. according to the described method of importing about the reception user of image of claim 69, wherein said position is essentially irrelative, makes that described reflected by objects light is represented in described output basically when having object.
71. one kind comprises about user input device image, that be used for positioning object:
At least one light source, be positioned at described image peripheral or its near, described light source guides light across described image;
At a detector place with output, described detector is positioned near described image place or its, and with to the aerial image before the described screen, the grade of light is represented in described output;
Receives described output and use the processor of triangulation technique, and described output determines the existence of described object, and if exist, determine the position of described object.
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216746B (en) * | 2007-12-26 | 2010-12-01 | 广东威创视讯科技股份有限公司 | Touch screen device and its position finding method |
| WO2011000327A1 (en) * | 2009-07-03 | 2011-01-06 | 北京汇冠新技术股份有限公司 | Light source for touch screen and touch screen |
| CN102053763A (en) * | 2009-10-26 | 2011-05-11 | 精工爱普生株式会社 | Optical position detection device and display device with position detection function |
| CN101576787B (en) * | 2008-05-07 | 2011-05-25 | 联想(北京)有限公司 | Electric equipment, notebook computer and method for realizing touch control |
| CN102129330A (en) * | 2009-07-07 | 2011-07-20 | 松翰科技股份有限公司 | Touch control screen, touch control module and control method |
| US8115753B2 (en) | 2007-04-11 | 2012-02-14 | Next Holdings Limited | Touch screen system with hover and click input methods |
| US8149221B2 (en) | 2004-05-07 | 2012-04-03 | Next Holdings Limited | Touch panel display system with illumination and detection provided from a single edge |
| CN102473062A (en) * | 2009-07-22 | 2012-05-23 | Nc3株式会社 | Optical position detecting device |
| CN102692182A (en) * | 2011-03-23 | 2012-09-26 | 刘中华 | Optical detection system used for screen touch control input device |
| US8289299B2 (en) | 2003-02-14 | 2012-10-16 | Next Holdings Limited | Touch screen signal processing |
| US8384693B2 (en) | 2007-08-30 | 2013-02-26 | Next Holdings Limited | Low profile touch panel systems |
| US8405637B2 (en) | 2008-01-07 | 2013-03-26 | Next Holdings Limited | Optical position sensing system and optical position sensor assembly with convex imaging window |
| US8432377B2 (en) | 2007-08-30 | 2013-04-30 | Next Holdings Limited | Optical touchscreen with improved illumination |
| US8456447B2 (en) | 2003-02-14 | 2013-06-04 | Next Holdings Limited | Touch screen signal processing |
| CN103189759A (en) * | 2010-09-02 | 2013-07-03 | 百安托国际有限公司 | Systems and methods for sensing and tracking radiation blocking objects on a surface |
| CN101562703B (en) * | 2008-04-15 | 2013-07-10 | 索尼株式会社 | Method and apparatus for performing touch-based adjustments within imaging devices |
| US8508508B2 (en) | 2003-02-14 | 2013-08-13 | Next Holdings Limited | Touch screen signal processing with single-point calibration |
| CN103294280A (en) * | 2012-03-02 | 2013-09-11 | 原相科技股份有限公司 | Optical touch device, passive touch system and input detection method thereof |
| CN103309517A (en) * | 2012-03-15 | 2013-09-18 | 原相科技股份有限公司 | Optical input device and input detection method thereof |
| TWI416942B (en) * | 2010-08-27 | 2013-11-21 | Disk King Technology Co Ltd | High Panoramic Photographic Touch Device and Method with High Operation Speed |
| CN103941920A (en) * | 2013-01-21 | 2014-07-23 | 原相科技股份有限公司 | Optical touch system |
| CN105022533A (en) * | 2009-12-15 | 2015-11-04 | 乐金显示有限公司 | Display module |
| US9557837B2 (en) | 2010-06-15 | 2017-01-31 | Pixart Imaging Inc. | Touch input apparatus and operation method thereof |
| CN103902084B (en) * | 2012-12-27 | 2017-06-13 | 上海天马微电子有限公司 | A kind of touch-screen |
| US9880668B2 (en) | 2013-09-11 | 2018-01-30 | Beijing Lenovo Software Ltd. | Method for identifying input information, apparatus for identifying input information and electronic device |
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6803906B1 (en) | 2000-07-05 | 2004-10-12 | Smart Technologies, Inc. | Passive touch system and method of detecting user input |
| US6954197B2 (en) | 2002-11-15 | 2005-10-11 | Smart Technologies Inc. | Size/scale and orientation determination of a pointer in a camera-based touch system |
| US7532206B2 (en) | 2003-03-11 | 2009-05-12 | Smart Technologies Ulc | System and method for differentiating between pointers used to contact touch surface |
| US7411575B2 (en) | 2003-09-16 | 2008-08-12 | Smart Technologies Ulc | Gesture recognition method and touch system incorporating the same |
| US7274356B2 (en) | 2003-10-09 | 2007-09-25 | Smart Technologies Inc. | Apparatus for determining the location of a pointer within a region of interest |
| US7355593B2 (en) | 2004-01-02 | 2008-04-08 | Smart Technologies, Inc. | Pointer tracking across multiple overlapping coordinate input sub-regions defining a generally contiguous input region |
| US7460110B2 (en) | 2004-04-29 | 2008-12-02 | Smart Technologies Ulc | Dual mode touch system |
| US8120596B2 (en) | 2004-05-21 | 2012-02-21 | Smart Technologies Ulc | Tiled touch system |
| JP4072732B2 (en) * | 2004-10-29 | 2008-04-09 | ソニー株式会社 | INPUT / OUTPUT DEVICE AND METHOD, RECORDING MEDIUM, AND PROGRAM |
| KR100756026B1 (en) * | 2006-07-19 | 2007-09-07 | 주식회사 엠씨넥스 | Operating device using camera and electronic apparatus |
| KR100894544B1 (en) * | 2006-11-30 | 2009-04-24 | 한국전자통신연구원 | Space touch screen and the operating method |
| US9442607B2 (en) | 2006-12-04 | 2016-09-13 | Smart Technologies Inc. | Interactive input system and method |
| WO2008087935A1 (en) * | 2007-01-17 | 2008-07-24 | Kabushiki Kaisha Sega Doing Business As Sega Corporation | Stationary vehicle game machine |
| US8094137B2 (en) | 2007-07-23 | 2012-01-10 | Smart Technologies Ulc | System and method of detecting contact on a display |
| KR100900321B1 (en) * | 2007-08-20 | 2009-06-02 | 윤주영 | Multi touch screen using infrared camera |
| US9171454B2 (en) | 2007-11-14 | 2015-10-27 | Microsoft Technology Licensing, Llc | Magic wand |
| US8902193B2 (en) | 2008-05-09 | 2014-12-02 | Smart Technologies Ulc | Interactive input system and bezel therefor |
| US8952894B2 (en) | 2008-05-12 | 2015-02-10 | Microsoft Technology Licensing, Llc | Computer vision-based multi-touch sensing using infrared lasers |
| US8847739B2 (en) | 2008-08-04 | 2014-09-30 | Microsoft Corporation | Fusing RFID and vision for surface object tracking |
| DE112008003983T5 (en) * | 2008-09-15 | 2011-07-21 | Hewlett-Packard Development Co., L.P., Tex. | Touch screen display with multiple cameras |
| KR100879328B1 (en) | 2008-10-21 | 2009-01-19 | (주)컴버스테크 | Apparatus and method for modulating finger depth by camera and touch screen with the apparatus |
| US8339378B2 (en) | 2008-11-05 | 2012-12-25 | Smart Technologies Ulc | Interactive input system with multi-angle reflector |
| KR100901971B1 (en) * | 2008-11-07 | 2009-06-10 | 김용철 | Apparatus for scanning a user's touch in touch screen |
| JP2010277122A (en) * | 2009-05-26 | 2010-12-09 | Xiroku:Kk | Optical position detection apparatus |
| KR20180110239A (en) * | 2009-06-16 | 2018-10-08 | 바안토 인터내셔널 엘티디. | Two-dimensional position sensing systems and sensors therefor |
| KR20170103987A (en) * | 2009-06-18 | 2017-09-13 | 바안토 인터내셔널 엘티디. | Systems and methods for sensing and tracking radiation blocking objects on a surface |
| JP5273676B2 (en) * | 2009-08-10 | 2013-08-28 | ヌライテン トレーディング （シャンハイ）カンパニー | Wide-area infrared light source multi-touch screen |
| TWI420357B (en) * | 2009-08-28 | 2013-12-21 | Pixart Imaging Inc | Touch system and pointer coordinate detecting method therefor |
| JP2011175543A (en) * | 2010-02-25 | 2011-09-08 | Sanyo Electric Co Ltd | Indicator detection device and touch panel |
| CN101847063B (en) * | 2010-03-03 | 2013-04-17 | 苏州佳世达电通有限公司 | System and method for detecting object by using non-coincident fields of light |
| CN101923418B (en) * | 2010-03-07 | 2013-01-16 | 苏州佳世达电通有限公司 | Object sensing system and method |
| CN102202172B (en) * | 2010-03-23 | 2016-03-09 | 北京汇冠新技术股份有限公司 | For the camera synchronization method with camera touch-screen and system |
| FR2958010B1 (en) * | 2010-03-25 | 2017-11-10 | Intui Sense | INTERACTIVE DEVICE ADAPTABLE TO AMBIENT LUMINOSITY CONDITIONS |
| CN102281395B (en) * | 2010-06-08 | 2014-09-03 | 北京汇冠新技术股份有限公司 | Touch screen, touch system and display |
| GB2487043B (en) | 2010-12-14 | 2013-08-14 | Epson Norway Res And Dev As | Camera-based multi-touch interaction and illumination system and method |
| US20120313895A1 (en) * | 2011-06-10 | 2012-12-13 | Texas Instruments Incorporated | Touch screen |
| KR101305808B1 (en) | 2011-10-11 | 2013-09-06 | 현대자동차주식회사 | Organic EL light device for automobile |
| WO2013104061A1 (en) * | 2012-01-11 | 2013-07-18 | Smart Technologies Ulc | Calibration of an interactive light curtain |
| KR101386503B1 (en) | 2012-07-30 | 2014-04-17 | 서울시립대학교 산학협력단 | Interactive disiplay device by trigonometric photo-recognition cell layout |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2554261B1 (en) | 1983-10-28 | 1987-04-30 | Thomson Csf | SENSITIVE DISPLAY DEVICE HAVING A SCANNING SCREEN |
| US4782328A (en) | 1986-10-02 | 1988-11-01 | Product Development Services, Incorporated | Ambient-light-responsive touch screen data input method and system |
| US4746770A (en) * | 1987-02-17 | 1988-05-24 | Sensor Frame Incorporated | Method and apparatus for isolating and manipulating graphic objects on computer video monitor |
| US4811004A (en) * | 1987-05-11 | 1989-03-07 | Dale Electronics, Inc. | Touch panel system and method for using same |
| JPH0521153Y2 (en) * | 1987-10-08 | 1993-05-31 | ||
| US5164714A (en) | 1988-06-20 | 1992-11-17 | Amp Incorporated | Modulated touch entry system and method with synchronous detection |
| JP2896183B2 (en) * | 1990-02-22 | 1999-05-31 | 株式会社ワコム | Optical multiple simultaneous two-dimensional coordinate input device |
| US5534917A (en) | 1991-05-09 | 1996-07-09 | Very Vivid, Inc. | Video image based control system |
| US5317140A (en) * | 1992-11-24 | 1994-05-31 | Dunthorn David I | Diffusion-assisted position location particularly for visual pen detection |
| JPH1031546A (en) * | 1996-07-17 | 1998-02-03 | Yamaha Corp | Coordinate input device |
| JP3624070B2 (en) * | 1997-03-07 | 2005-02-23 | キヤノン株式会社 | Coordinate input device and control method thereof |
| JPH11110116A (en) * | 1997-08-07 | 1999-04-23 | Fujitsu Ltd | Optical position detection device |
| DE69838535T2 (en) * | 1997-08-07 | 2008-07-10 | Fujitsu Ltd., Kawasaki | Optically scanning touch-sensitive panel |
| JP2000105671A (en) * | 1998-05-11 | 2000-04-11 | Ricoh Co Ltd | Coordinate input and detecting device, and electronic blackboard system |
| JP2001014091A (en) * | 1999-06-30 | 2001-01-19 | Ricoh Co Ltd | Coordinate input device |
| JP3986710B2 (en) * | 1999-07-15 | 2007-10-03 | 株式会社リコー | Coordinate detection device |
| JP4083941B2 (en) * | 1999-09-03 | 2008-04-30 | 株式会社リコー | Coordinate input device |
| JP2001282445A (en) * | 2000-03-31 | 2001-10-12 | Ricoh Co Ltd | Coordinate input/detecting device and information display input device |
| US6864882B2 (en) * | 2000-05-24 | 2005-03-08 | Next Holdings Limited | Protected touch panel display system |
| JP4208394B2 (en) * | 2000-08-09 | 2009-01-14 | 株式会社リコー | Coordinate input device |
| JP4538933B2 (en) * | 2000-10-06 | 2010-09-08 | 三菱電機株式会社 | Liquid crystal display with position detection function |
| JP2002196874A (en) * | 2000-12-27 | 2002-07-12 | Ntt Docomo Inc | Device and method for inputting handwritten data, personal certification device and its method |
| JP4357761B2 (en) * | 2001-03-23 | 2009-11-04 | 株式会社リコー | Optical coordinate input device |
-
2004
- 2004-02-16 AU AU2004211738A patent/AU2004211738B2/en not_active Ceased
- 2004-02-16 CA CA2515955A patent/CA2515955C/en not_active Expired - Fee Related
- 2004-02-16 JP JP2006502767A patent/JP4668897B2/en not_active Expired - Fee Related
- 2004-02-16 KR KR1020057014885A patent/KR101035253B1/en not_active IP Right Cessation
- 2004-02-16 CN CNB2004800099261A patent/CN100468303C/en not_active Expired - Fee Related
- 2004-02-16 EP EP04711522A patent/EP1599789A4/en not_active Withdrawn
- 2004-02-16 WO PCT/NZ2004/000029 patent/WO2004072843A1/en active IP Right Grant
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|---|---|---|---|---|
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| US8456447B2 (en) | 2003-02-14 | 2013-06-04 | Next Holdings Limited | Touch screen signal processing |
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| CN101216746B (en) * | 2007-12-26 | 2010-12-01 | 广东威创视讯科技股份有限公司 | Touch screen device and its position finding method |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1599789A1 (en) | 2005-11-30 |
| AU2004211738A1 (en) | 2004-08-26 |
| KR20050111324A (en) | 2005-11-24 |
| KR101035253B1 (en) | 2011-05-19 |
| AU2004211738B2 (en) | 2007-04-19 |
| CN100468303C (en) | 2009-03-11 |
| WO2004072843A1 (en) | 2004-08-26 |
| JP2006518076A (en) | 2006-08-03 |
| EP1599789A4 (en) | 2010-03-31 |
| CA2515955A1 (en) | 2004-08-26 |
| CA2515955C (en) | 2011-01-11 |
| JP4668897B2 (en) | 2011-04-13 |
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