CN102778976B - Touch point method for determining position and touch-screen on a kind of touch-screen - Google Patents
Touch point method for determining position and touch-screen on a kind of touch-screen Download PDFInfo
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- CN102778976B CN102778976B CN201210026319.2A CN201210026319A CN102778976B CN 102778976 B CN102778976 B CN 102778976B CN 201210026319 A CN201210026319 A CN 201210026319A CN 102778976 B CN102778976 B CN 102778976B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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Abstract
The invention discloses touch point method for determining position and touch-screen on a kind of touch-screen, comprising: touch-screen comprises the display screen of polygonized structure, the inside surface of any one frame of display screen arranges catoptron; In any two frame point of intersection of other except the frame being provided with catoptron, image acquisition units is set; During touch display screen, according to the position of touch point imaging in image acquisition units and the position by catoptron imaging in image acquisition units, determine the position of touch point.By the present invention, except the restricted problem of existing various touch screen technology in application size can be solved, relative to existing dual image collecting unit measuring system, decrease image acquisition units quantity, structure simplifies, easy for installation, and the position debugging of image acquisition units is easier.
Description
Technical field
The present invention relates to touch screen technology, refer to touch point method for determining position and touch-screen on a kind of touch-screen especially.
Background technology
Touch-screen (Touchpanel) is also called contact panel, it is an induction type liquid crystal indicator that can receive the input signals such as contact, when graphic button on contact screen, haptic feedback system on screen can drive various coupling arrangement according to the formula of programming in advance, and presents various information by liquid crystal display picture.
At present, touch screen technology mainly contains four kinds of schemes: resistive technologies touch-screen, capacitance technology touch-screen, surface acoustic wave technique touch-screen and noctovisor scan technology touch-screen.
Wherein, resistive technologies touch-screen, be called for short electric resistance touch screen, develop into five wire resistive touchscreen from four-line resistive touch screen, no matter be four-line resistive touch screen or five wire resistive touchscreen, they are all a kind of working environments completely isolated to external world, be not afraid of dust, steam and greasy dirt, can touch with any object, can be used for drawing of writing, people's use of limited quantity such as relatively be applicable in industrial control field and office.But the shortcoming that all electric resistance touch screens have is: because the skin of laminated film adopts plastic material, if exert oneself very much when user touches or use sharp instrument touch may scratch whole touch-screen and cause it to scrap.For five wire resistive touchscreen, in service limits, scratch the outer conducting layer that only can injure touch-screen; And concerning being that to scratch outer conducting layer be fatal four-line resistive touch screen.From the difficulty detected, electric resistance touch screen is little to the requirement of size, but during large scale, the injury area be subject to increases, and more easily produces the problems such as scuffing.
Capacitance technology touch-screen, be called for short capacitance touch screen, it is one piece of four layers of compound glass screen, when user touches capacitance plate, due to human body electric field effect, finger and workplace is made to form a coupling capacitance, again because workplace is connected to high-frequency signal, so finger can absorb a very little electric current, this electric current divides and flows out from the electrode touch-screen four angles, four electric currents flowing through these four electrodes are in theory proportional to the distance at four angles with finger, and controller, by calculating the precision of these four current ratios, draws the position of touch point.But a remarkable shortcoming of capacitance touch screen is: do not react when touching with glove finger or hand-held nonconducting object; And the main shortcoming of capacitance touch screen is drift: when environment temperature, humidity change, environment of electric field changes, and can cause the drift of capacitance touch screen, touch point is caused to calculate inaccurate.When touch-screen size is too large, corresponding current signal decay is comparatively serious, and is easier to affect by extraneous environment temperature, humidity etc. produce drift.
Surface acoustic wave technique touch-screen, be called for short acoustic wave touching screen, adopt ultrasound wave at the communications of dielectric surface, when there being object contact, energy and the shape of sound wave change, thus position, perception touch point, in addition, the variable quantity in all right perception the 3rd direction of surface acoustic wave, can bear the touch of various high strength, be applicable to the touch-screen applications in the face of public place.But when screen size is too large, because the decay of surface acoustic wave is relatively large, need more high-precision detection, add cost and realize difficulty.
Noctovisor scan technology touch-screen, is called for short infrared touch panel, utilizes the infrared ray matrix that X, Y-direction are gathered to detect and the touch of consumer positioning.Usually, infrared touch panel installs a housing before liquid crystal display, and the circuit board in dependence plant housing is at screen four limit arrangement infrared transmitting tube and infrared receiving tube, and one_to_one corresponding forms the infrared ray matrix anyhow intersected.User, when touch screen, points two infrared rays anyhow that will block through this position, thus can judge the position of touch point.But infrared touch panel can only bear limited light interference, therefore has certain restriction in environment for use.
The touch-screen of above-mentioned various technology has certain restriction in environment for use, and meanwhile, they have a common shortcoming: in the process that touch-screen size becomes large, and the cost of manufacture also becomes large, especially infrared touch panel gradually; In addition, above-mentioned four kinds of touch-screens, when being applied to large scale, because signal propagation in film can significantly decay, causing touch point to detect out of true, are not therefore suitable for large scale.
Prior art also teaches charge coupled cell (Charge-coupledDevice, CCD) Convergent measurement is as a kind of non-contact coordinate measuring technique, demonstrate the superiority of its uniqueness in application Spatial distributions target being carried out to coordinate setting, be widely used in the fields of measurement such as the position to target, size.At present, have a kind of pair of CCD system to be applied to the judgement of touch location, two CCD measuring system is installed on display screen surface, unrestricted to display mode, as the display screens such as CRT, DLP, PDP, LCD all can be combined.On display size, regardless of the size of display size, the hardware of two CCD monitoring system is formed except backlight is variant, other main functional parts does not change, therefore size is larger, and cost advantage and the succinct degree of its system are more outstanding, are more suitable for being applied on the touch-screen of large-size.
But two CCD system also has its inferior position existed, such as owing to adopting two CCD, need two cover signal detection systems to obtain coordinate position, structure is more complicated, and in addition, because two CCD interacts, therefore also more complicated is debugged in the position of two CCD.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide touch point method for determining position and touch-screen on a kind of touch-screen, can solve the restricted problem of existing various touch screen technology in application size.
In order to achieve the above object, technical scheme of the present invention is achieved in that
The invention provides touch point method for determining position on a kind of touch-screen, described touch-screen comprises the display screen of polygonized structure; The inside surface of any one frame of described display screen arranges catoptron; Except described other arbitrary neighborhood two frame point of intersection be provided with except the frame of catoptron, an image acquisition units is being set; The method also comprises:
When touching described display screen, according to the position of touch point imaging in image acquisition units and the position by the imaging in image acquisition units of described catoptron, determine the position of described touch point.
Image acquisition units is set in the angle of described adjacent two frame compositions, comprises:
By the apertures align on the intersection point of described adjacent two frames and the lens of image acquisition units;
The intersection point of described adjacent two frames is set to initial point O, makes the frame in described adjacent two frames be positioned at x-axis, using the direction perpendicular to x-axis as y-axis; The angle of described adjacent two frames is
the centre normal of described lens and the angled θ of described x-axis.Described angle θ is
The method also comprises: on the outside surface of described lens, arrange infrared light transmission sheet; The described outside surface being positioned at the frame of x-axis arranges infrared backlight source;
The Infrared that described touch point utilizes described infrared backlight source to provide, through after described infrared light transmission sheet in described image acquisition units imaging and by after described catoptron through the imaging in described image acquisition units of described infrared light transmission sheet.
The method also comprises: the position determining the imaging in image acquisition units of described touch point, comprising:
Described lens are passed through in described touch point, in the imaging surface imaging of described lens, and by the picture point on image acquisition units chip detection imaging surface;
Distance between the picture point of described touch point on imaging surface and the subpoint of described centre normal on described imaging surface is a
1; Line between the picture point on imaging surface of described touch point and described touch point and the angled α of described centre normal.
Determine the position of described touch point by the imaging in described image acquisition units of described catoptron, comprising:
Described lens are passed through, imaging on the imaging surface of described lens by the picture point of imaging after described catoptron in described touch point, and by the picture point on image acquisition units chip detection imaging surface;
Described touch point is a by the distance between the picture point of described catoptron on imaging surface and described subpoint
2; Described touch point by the picture point of imaging after described catoptron and described touch point by the line between the picture point of described catoptron on imaging surface and the angled β of described centre normal.
Determine the position of described touch point (x, y), for:
Wherein, described in
described L is the length of the frame being positioned at x-axis; Described s is the distance between described initial point O and described subpoint.
Present invention also offers a kind of touch-screen, comprise the display screen of parallelogram sturcutre, be arranged on described display screen any one frame inside surface on catoptron and the image acquisition units that is arranged on except described other arbitrary neighborhood two frame point of intersection be provided with except the frame of catoptron;
The imaging in described image acquisition units of touch point on described display screen, and by the imaging in described image acquisition units of described catoptron;
Described image acquisition units, according to the position of described touch point imaging in described image acquisition units and the position by the imaging in described image acquisition units of described catoptron, determines the position of described touch point.
Apertures align on the intersection point of described adjacent two frames and the lens of described image acquisition units; The angle of described adjacent two frames is
The intersection point of described adjacent two frames is initial point O, and the frame in described adjacent two frames is positioned at x-axis, and the direction perpendicular to x-axis is y-axis;
The centre normal of described lens and described adjacent two frame metas are in the angled θ of frame of x-axis; Described θ is
Described touch-screen also comprises:
Be arranged on the infrared backlight source of described adjacent two frame metas on the outside surface of the frame of x-axis, for providing Infrared for the touch point on described display screen;
Be arranged on the infrared light transmission sheet on the outside surface of described lens, for visible light, the Infrared making the touch point on described display screen utilize described infrared backlight source to provide, through after described infrared light transmission sheet in described image acquisition units imaging and by after described catoptron through the imaging in described image acquisition units of described infrared light transmission sheet.
The upper touch point method for determining position of inventive touch screen and touch-screen, improve dual image collecting unit system, only need an image acquisition units and a catoptron to combine with display screen, just can realize touch screen technology.Therefore, the present invention is based on the touch-screen of single image collecting unit, size is larger, and cost advantage and the succinct degree of system are more outstanding, are more suitable for being applied on the touch-screen of large-size.
In addition, single image collecting unit is compared with dual image collecting unit, and decrease image acquisition units quantity, structure more simplifies, easy for installation, in addition, an only image acquisition units measuring system, not by other influences, therefore, the position debugging of single image collecting unit is also easier.
Accompanying drawing explanation
Fig. 1 is inventive touch screen upper touch point method for determining position process flow diagram;
Fig. 2 is inventive touch point measuring principle figure;
Fig. 3 is quadrilateral touch screen structure schematic diagram of the present invention;
Fig. 4 is triangle touch screen structure schematic diagram of the present invention;
Fig. 5 is hexagonal touch of the present invention screen structural representation.
Description of reference numerals:
1. display screen; 2. image acquisition units; 3. catoptron; 4. frame; 5. frame; 6. frame; 7. frame; 8. lens; 9. image acquisition units chip; 10. infrared light transmission sheet; 11. infrared backlight sources; 12. touch points; 12 '. picture point; 13. apertures; 14. picture points; 15. picture points; The centre normal of 16. lens; 17. subpoints.
Embodiment
The basic thought of inventive touch screen and its implementation is: improve existing dual image collecting unit measuring system, an image acquisition units is detected imaging system and is combined with the display screen being provided with a catoptron application system forming touch-screen.So, single image collecting unit is compared with dual image collecting unit, and structure more simplifies, easy for installation, and the position debugging of single image collecting unit is also easier.
So-called image acquisition units detects imaging system and namely refers to image acquisition units.Image acquisition units can be CCD, also can be complementary metal oxide semiconductor (CMOS) (CMOS, ComplementaryMetalOxideSemiconductor).
Inventive touch screen implementation method as shown in Figure 1, comprises the following steps:
Step 101, the inside surface of any one frame of the display screen of polygonized structure arranges catoptron; And an image acquisition units is set in other arbitrary neighborhood two frame point of intersection except the frame being provided with catoptron;
Step 102, during touch display screen, according to the position of touch point imaging in image acquisition units and the position by catoptron imaging in image acquisition units, determines the position of touch point.
Wherein, the method arranging image acquisition units is: by the apertures align on the intersection point of adjacent for image acquisition units place two frames and the lens of image acquisition units; And make the angled θ of one of them frame in image acquisition units and adjacent two frames, concrete: the intersection point of adjacent two frames is set to initial point O, the adjacent frame of the frame in adjacent two frames is made to be positioned at x-axis, using the direction perpendicular to x-axis as y-axis (y-axis be separately less than 90 degree with the angle of frame); The angle of adjacent two frames is
make the centre normal of the lens of image acquisition units and x-axis (being namely positioned at the frame of x-axis) angled θ; Preferably, θ is
Preferably, above-mentioned polygon is quadrilateral, is further rectangle.
Illustrate the defining method of touch point below for rectangular display screen, Figure 2 shows that touch point measuring principle figure, as shown in Figure 2, the inside surface of the frame 4 of display screen 1 is provided with a catoptron; The aperture 13 of the lens 8 of image acquisition units 2 aligns with the intersection point of frame 6 and frame 5, intersection point is set to initial point O, make the arbitrary frame in frame 6 and frame 5 be positioned at x-axis, such as, make frame 5 be positioned at x-axis, the axle at frame 6 place is set to y-axis (frame 6 is vertical with frame 5); The angle of frame 5 and frame 6 is
(90 degree); The centre normal 16 of lens 8 and the angled θ of x-axis (
degree).
The position measurement mode of touch point is:
One, the position of touch point 12 imaging in image acquisition units 2 is determined, concrete:
Touch point 12 scioptics 8, imaging on the imaging surface of lens 8, and by the picture point 15 of image acquisition units chip 9 detected touch point 12 on imaging surface; Wherein, the light on touch point 12 is from the infrared backlight source 11 (as shown in Figure 3) of touch-screen.
Distance between picture point 15 and centre normal 16 subpoint 17 on imaging surface is a
1; Line between touch point 12 and picture point 15 and the angled α of centre normal 16.
So, the position of touch point 12 imaging in image acquisition units 2 can be determined.
Two, the position of touch point 12 by catoptron imaging in image acquisition units 2 is determined, concrete:
Touch point 12 by the picture point 12 ' scioptics 8 of imaging after catoptron, imaging on the imaging surface of lens 8, and by image acquisition units chip 9 detected touch point 12 by the picture point 14 after catoptron on imaging surface;
Distance between picture point 14 and subpoint 17 is a
2; Line between picture point 12 ' and picture point 14 and the angled β of centre normal 16.
So, the position of touch point 12 by imaging in image acquisition units 2 after catoptron can be determined.
Wherein, above-mentioned image acquisition units chip 9 adopts following mode when being detected as the picture point in image planes: comprise an image analysis instrument in image acquisition units 2, in order to analyze image point position, the position of picture point when confirming the most clear, the position of image acquisition units chip 9 is regulated with this, concrete, need the direction of the centre normal 16 along lens to regulate, make image acquisition units chip 9 picture point the most clearly be detected.In processing procedure, the position that can suppose residing for image acquisition units chip 9 be imaging the most clear time picture point place the position of imaging surface.
In addition, above by lens on imaging surface imaging applications be the pinhole imaging system principle of lens.
Three, calculate the position of touch point (x, y), for:
Wherein,
L is the length of the frame 5 being positioned at x-axis; S is the distance between initial point O and subpoint 17, and the value of s can change along with the position of image acquisition units chip 9.
Can be drawn by above-mentioned formula,
get 90 degree, θ gets
when spending, the calculating of position, touch point is comparatively simple, and the scope of detection is comparatively wide, and image acquisition units detection imaging system can detect any one touch point on display screen.
Based on above-mentioned touch-screen implementation method, the invention allows for a kind of touch-screen, as shown in Figure 3, comprise: the display screen 1 of polygonized structure, be arranged at display screen 1 any one frame (the present embodiment is frame 4) inside surface on catoptron 3 and be arranged at other any two frames compositions except the frame being provided with catoptron point of intersection image acquisition units 2, Fig. 3 in be the angle of frame 6 and frame 5.
The imaging 15 in image acquisition units 2 of touch point 12 on display screen 1, and by catoptron 3 imaging 14 in image acquisition units 2; Image acquisition units 2, according to the position of the position of imaging 15 and imaging 14, determines the position of touch point 12.Concrete implementation method, with the position measurement mode of above-mentioned touch point, repeats no more herein.
When arranging the position of image acquisition units 2: the intersection point of two frames of the image acquisition units 2 place angle intersection point of frame 6 and frame 5 (in the Fig. 3) is alignd with the aperture 13 on the lens 8 of image acquisition units 2; And the angled θ of frame adjacent with the frame being provided with catoptron 3 in the centre normal 16 of lens 8 and two frames, in the present embodiment, adjacent with frame 4 in frame 6 and frame 5 is frame 5, the then centre normal 16 of lens 8 and the angled θ of frame 5, so, the position of image acquisition units can just be determined.
Preferably,
for the angle of the angle of above-mentioned two frames; Preferably,
be 90 degree, now, the calculating of position, touch point is comparatively simple, and the scope of detection is comparatively wide, and image acquisition units detection imaging system can detect any one touch point on display screen.
In the touch-screen implementation that the present invention proposes, be adopt the pinhole imaging system principle of lens because image acquisition units detects imaging system, during imaging in image acquisition units, the change of s value is very little, is therefore applicable to the touch-screen of giant-screen.For the touch-screen of giant-screen that other technologies realize, such as infrared touch panel, needs to increase corresponding infrared emission and receiving tube, and electric capacity and resistance and acoustic wave touching screen increase due to the size of screen, are faced with the difficulty of detection accuracy raising.
It is pointed out that being of wide application due to touch-screen, comprise the working environment of low-light level and high brightness.Along with the change of working environment brightness, the brightness of display screen display frame is also in change, and the change of these external environment condition light can detect imaging system to image acquisition units and cause direct impact.In order to get rid of the interference of these outside visible rays, need connected applications based on infrared optical system, to get rid of the interference of visible ray to image acquisition units detection imaging system.
Concrete: as shown in Figure 3, the outside surface of lens 8 arranges an infrared light transmission sheet 10; The outside surface of frame 5 being positioned at x-axis arranges an infrared backlight source 11.The Infrared that touch point 12 utilizes infrared backlight source 11 to provide, through after infrared light transmission sheet 10 and scioptics 8 imaging and by catoptron 3, again through scioptics 8 imaging on imaging surface after infrared light transmission sheet 10 on imaging surface.
Because Infrared is invisible light, can not impact the display of display screen and external environment condition, Infrared can follow camera imaging principle, imaging in image acquisition units simultaneously.Infrared light transmission sheet 10 allows Infrared directly to pass through, luminous ray be filtered not by, can reach more than 95% to the transmittance of Infrared, be less than 5% to the transmittance of visible ray.
When touch display screen, even if in dark conditions, touch point 12 also " can be illuminated " by the Infrared of infrared backlight source 11, produce reflection, the Infrared of reflection enters lens 8 and imaging on imaging surface by infrared light transmission sheet 10, is detected as the picture point in image planes by image acquisition units chip 9; Meanwhile, the catoptron 3 of avris by scioptics 8 imaging on imaging surface again after infrared light reflection, and can be detected as the picture point in image planes by image acquisition units chip 9.So how to change regardless of the power of surround lighting and the brightness and color of display screen displaying contents, the reflection ray of these visible rays all can be filtered out by infrared light transmission sheet 10, therefore can not detect imaging system to image acquisition units and have an impact.This image acquisition units can be CCD or CMOS.
The above-mentioned method of the present invention is equally applicable to the polygon such as triangle, hexagon touch-screen.Be illustrated in figure 4 the structural representation of triangle touch-screen; Figure 5 shows that the structural representation that hexagonal touch shields.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. a touch point method for determining position on touch-screen, described touch-screen comprises the display screen of polygonized structure; It is characterized in that, the inside surface of any one frame of described display screen arranges catoptron; Except described other arbitrary neighborhood two frame point of intersection be provided with except the frame of catoptron, an image acquisition units is being set; The method also comprises:
When touching described display screen, determine the position of described touch point imaging in image acquisition units and the touch point position by the imaging in described image acquisition units of described catoptron, and according to the position of touch point imaging in image acquisition units and the position by the imaging in image acquisition units of described catoptron, determine the position of described touch point;
Wherein, the intersection point of described adjacent two frames is set to initial point O, makes the frame in described adjacent two frames be positioned at x-axis, using the direction perpendicular to x-axis as y-axis; The outside surface of the lens of described image acquisition units is provided with infrared light transmission sheet; The described outside surface being positioned at the frame of x-axis is provided with infrared backlight source;
The Infrared that described touch point utilizes described infrared backlight source to provide, through after the aperture on described infrared light transmission sheet and lens in described image acquisition units imaging and by after described catoptron through the aperture imaging in described image acquisition units on described infrared light transmission sheet and lens.
2. touch point method for determining position on touch-screen according to claim 1, is characterized in that, arrange image acquisition units, comprising in the angle of described adjacent two frames compositions:
By the apertures align on the intersection point of described adjacent two frames and the lens of image acquisition units;
The angle of described adjacent two frames is
the centre normal of described lens and the angled θ of described x-axis.
3. touch point method for determining position on touch-screen according to claim 2, it is characterized in that, described angle θ is
4. touch point method for determining position on touch-screen according to claim 3, it is characterized in that, the described position determining the imaging in image acquisition units of described touch point, comprising:
Described lens are passed through in described touch point, in the imaging surface imaging of described lens, and by the picture point on image acquisition units chip detection imaging surface;
Distance between the picture point of described touch point on imaging surface and the subpoint of described centre normal on described imaging surface is a
1; Line between the picture point on imaging surface of described touch point and described touch point and the angled α of described centre normal.
5. touch point method for determining position on touch-screen according to claim 4, is characterized in that, determine the position of described touch point by the imaging in described image acquisition units of described catoptron, comprising:
Described lens are passed through, imaging on the imaging surface of described lens by the picture point of imaging after described catoptron in described touch point, and by the picture point on image acquisition units chip detection imaging surface;
Described touch point is a by the distance between the picture point of described catoptron on imaging surface and described subpoint
2; Described touch point by the picture point of imaging after described catoptron and described touch point by the line between the picture point of described catoptron on imaging surface and the angled β of described centre normal.
6. touch point method for determining position on touch-screen according to claim 5, is characterized in that, determine the position of described touch point (x, y), for:
Wherein, described in
described L is the length of the frame being positioned at x-axis; Described s is the distance between described initial point O and described subpoint.
7. a touch-screen, it is characterized in that, comprise the display screen of parallelogram sturcutre, be arranged on described display screen any one frame inside surface on catoptron and the image acquisition units that is arranged on except described other arbitrary neighborhood two frame point of intersection be provided with except the frame of catoptron;
The imaging in described image acquisition units of touch point on described display screen, and by the imaging in described image acquisition units of described catoptron;
Described image acquisition units, determine the position of described touch point imaging in image acquisition units and the touch point position by the imaging in described image acquisition units of described catoptron, and according to the position of described touch point imaging in described image acquisition units and the position by the imaging in described image acquisition units of described catoptron, determine the position of described touch point;
Wherein, the intersection point of described adjacent two frames is set to initial point O, makes the frame in described adjacent two frames be positioned at x-axis, using the direction perpendicular to x-axis as y-axis; The outside surface of the lens of described image acquisition units is provided with infrared light transmission sheet, the described outside surface being positioned at the frame of x-axis is provided with infrared backlight source, the Infrared utilizing described infrared backlight source to make described touch point and provide, through after the aperture on described infrared light transmission sheet and lens in described image acquisition units imaging and by after described catoptron through the aperture imaging in described image acquisition units on described infrared light transmission sheet and lens.
8. touch-screen according to claim 7, is characterized in that, the apertures align on the intersection point of described adjacent two frames and the lens of described image acquisition units; The angle of described adjacent two frames is
The centre normal of described lens and described adjacent two frame metas are in the angled θ of frame of x-axis; Described θ is
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| CN201210026319.2A CN102778976B (en) | 2012-02-07 | 2012-02-07 | Touch point method for determining position and touch-screen on a kind of touch-screen |
| PCT/CN2012/086203 WO2013117100A1 (en) | 2012-02-07 | 2012-12-07 | Method for determining position of touch point on touch panel, and touch panel |
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| CN201210026319.2A CN102778976B (en) | 2012-02-07 | 2012-02-07 | Touch point method for determining position and touch-screen on a kind of touch-screen |
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| CN102778976B (en) * | 2012-02-07 | 2016-03-30 | 北京京东方光电科技有限公司 | Touch point method for determining position and touch-screen on a kind of touch-screen |
| CN105607786B (en) * | 2016-03-14 | 2018-11-02 | 青岛海信电器股份有限公司 | A kind of recognition methods of touch point and infrared touch device |
| CN107562288B (en) * | 2017-08-31 | 2020-03-06 | 广东美的制冷设备有限公司 | Response method based on infrared touch device, infrared touch device and medium |
| CN111198633B (en) * | 2019-12-23 | 2023-04-07 | 宁波伊士通技术股份有限公司 | Five-wire resistance touch screen touch signal acquisition method |
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| CN101644975B (en) * | 2008-08-07 | 2012-10-03 | 原相科技股份有限公司 | Sensing system |
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| CN102103437B (en) * | 2009-12-21 | 2013-05-22 | 原相科技股份有限公司 | Optical touch device and positioning method thereof |
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| CN101887329B (en) * | 2010-07-13 | 2012-01-25 | 世大光电(深圳)有限公司 | Electronic equipment and optical positioning device thereof |
| CN102778976B (en) * | 2012-02-07 | 2016-03-30 | 北京京东方光电科技有限公司 | Touch point method for determining position and touch-screen on a kind of touch-screen |
-
2012
- 2012-02-07 CN CN201210026319.2A patent/CN102778976B/en active Active
- 2012-12-07 WO PCT/CN2012/086203 patent/WO2013117100A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN102778976A (en) | 2012-11-14 |
| WO2013117100A1 (en) | 2013-08-15 |
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