CN101441540B - Optical touch control apparatus - Google Patents
Optical touch control apparatus Download PDFInfo
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- CN101441540B CN101441540B CN2007101932164A CN200710193216A CN101441540B CN 101441540 B CN101441540 B CN 101441540B CN 2007101932164 A CN2007101932164 A CN 2007101932164A CN 200710193216 A CN200710193216 A CN 200710193216A CN 101441540 B CN101441540 B CN 101441540B
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- optical information
- light guide
- light
- guide module
- optical
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Abstract
The invention relates to an optical touch-control device, which comprises a light source for projecting linear light; a light guide module containing an optical information extraction position and capable of changing the linear light projected by the light source into plane light and guiding the plane light to the optical information extraction position, and generating optical information according to the input or reflected light from the optical information extraction position; and an image sensing module which senses the optical information generated by the light guide module and generates electronic signals according to the optical information, wherein the image sensing module is located at the side of the light guide module. At the same time the invention also provides a control method of the optical touch-control device.
Description
Technical field
The present invention relates to a kind of optical touch control apparatus, it produces signal with moving of optical mode detecting input media.The present invention also relates to control the method for this device.
Background technology
Contactor control device has been common now electronic component, is found in the Trackpad of notebook computer (touchpad) for example or as touch control screen (touch screen or touch panel) of ATM (Automatic Teller Machine), PDA (Personal Digital Assistant), e-dictionary etc. or the like.Present various contactor control device is the position of coming the sensing touch-control with resistance-type or capacitive mode.The drive principle of resistance-type is to utilize the mode of voltage drop to look for coordinate axis, when resistance touch screen is contacted, because the loop is switched on, and can produce voltage drop, and on the level and vertical direction of panel, with the difference of position, voltage drop is also different, so controller can calculate coordinate according to voltage drop.Capacitive framework then is based on ITO (Indium Tin Oxide) glass, its drive principle is four jiaos of discharges at ito glass, make the surface form a uniform electric field, when the object that can conduct electricity, for example point, the current lead-through of trace is run off, and controller just calculates the ratio that electric current runs off, and and then calculates X-axis and Y-axis coordinate.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and defective, propose a kind of brand-new optical touch control apparatus, its drive principle is neither also non-capacitive of resistance-type, but moving with optical mode detecting input media.Therefore, input media neither needs screen or Trackpad are exerted pressure, and does not also need to have electric conductivity.And contactor control device of the present invention do not need to use complicated element and processing procedure on making, and cost comes lowly far beyond existing resistance-type or capacitive touch device.
Second purpose of the present invention is, proposes a kind of control method of contactor control device.
For reaching above-mentioned purpose, in one of them embodiment of the present invention, provide a kind of optical touch control apparatus, comprise: a light source, projection linear light; One light guide module, contain optical information extraction position, this light guide module can be transformed into planar light with the linear light of this light source projects, and this planar-light guide is caused on this optical information extraction position, and produces optical information according to the light from this optical information extraction position input or reflection; An and image sensing module, the optical information that its this light guide module of sensing is produced, this electric signal exports a treatment circuit to, producing three-dimensional information, and produces electric signal according to this optical information, wherein this image sensing module is positioned at the side of this light guide module, and wherein, this image sensing module has two sensors, and its center position is T, the focusing distance of sensor is f, and then this three-dimensional information calculates acquisition according to following mode: X=(T * x
l)/(x
l-x
r); Y=(T * y
l)/(x
l-x
r); Z=f * [T/ (x
l-x
r)], x wherein
l, y
lFor one of them sensor is an initial point gained two-dimensional coordinate with the center of this sensor, x
r, y
rFor another sensor is an initial point gained two-dimensional coordinate with the center of this sensor.
In the foregoing description, an inner infrared light sources can be set.One group of lens can be set between light guide module and image sensing module again.In addition, a feedback control circuit can be set again, with according to the optical information that light guide module was produced, and the brightness of FEEDBACK CONTROL internal light source.The electric signal that image sensing module produced can be handled by a treatment circuit, and produces signal control cursor, or controls the action of other circuit, or produces three-dimensional information.
In addition, according to another embodiment of the invention, also provide a kind of control method of optical touch control apparatus, comprise: the projection linear light; One light guide module is provided, and it contains optical information extraction position, and this light guide module is transformed into planar light with this linear light, and this planar-light guide is caused on this optical information extraction position; Make this light guide module produce optical information according to light from this optical information extraction position input or reflection; And the optical information that produced of side this light guide module of sensing of this light guide module certainly, and produce electric signal according to this optical information, wherein, this light guide module has an inclined-plane on this optical information extraction opposite, position, and is projected to this inclined-plane from the light of this optical information extraction position input or reflection and reflects and produce this optical information.
Illustrate in detail below by specific embodiment, when the effect that is easier to understand purpose of the present invention, technology contents, characteristics and is reached.
Description of drawings
Fig. 1 is the first embodiment of the present invention;
How Fig. 2 explanation calculates three-dimensional coordinate information;
Fig. 3 is the second embodiment of the present invention;
Fig. 4 is the present invention's the 3rd embodiment;
Fig. 5 is the application examples of Fig. 4 embodiment.
Symbol description among the figure
10 optical touch control apparatus
11 casings
12 light sources
14 light guide modules
141 touch-control surface
15 lens modules
151,152 lens
16 image sensing modules
17 feedback control circuits
20 input medias
21 reflective materials
30 treatment circuits
40 display screens
41 cursors
Embodiment
Accompanying drawing among the present invention all belongs to signal, mainly is intended to represent interelement structure-function relationship, and the shape of non-limiting element or proportionate relationship therebetween.Optical touch control apparatus of the present invention can be applicable to Trackpad, Touch Screen or other control purposes.In fact control " is touched " in not absolute demand of optical touch control apparatus of the present invention, but because of one of the object of the invention is to provide another kind of solution to existing contactor control device, therefore still continues to use the term of " contactor control device ".
See also Fig. 1, optical touch control apparatus 10 of the present invention consists essentially of light source 12, light guide module 14 and image sensing module 16, and its outside then is provided with input media 20.Input media 20 can be any object, for example finger, lip pencil thing, or the like, and need not to be the exclusive part of optical touch control apparatus 10; Input media 20 needn't have electric conductivity.The effect of light source 12 is that light is projected in the light guide module 14, and its position must be not as shown in the figure, and can be in other position, for example touch-control surface 141 directly over or the side top.If lamp is enough strong, then light source 12 also can omit; But generally speaking should provide light source 12, and be good with infrared light sources, stable in the hope of light luminance.The effect of light guide module 14 is that the mobile status with input media 20 conveys to image sensing module 16; Light guide module itself has been practical technology, can use injection molding, ink-jet technology or stamping technique to make, and therefore the non-emphasis of the present invention of its method for making will not describe in detail.For example prism is the wherein a kind of than simple form of light guide module 14.In complicated form, comprise the light guide plate (not shown) in the light guide module 14, the linear light sorurce that sends from light source 12 can be transformed into refrangible planar light source, evenly be projected to Touch Screen surface 141, and the input or the reflection ray that will be received from Touch Screen surface 141 convey to image sensing module 16, make image sensing module 16 be captured the optical information that relevant input media 20 moves.Preferable, the front end of input media 20 can add reflective material 21, and so the optical information that image sensing module 16 is captured is more correct.Input media 20 does not need to exert pressure to touch-control surface 141, and therefore not absolute demand directly contacts touch-control surface 141.Similar to the reason of continuing to use " contactor control device " term, use " touch-control surface " speech among the present invention, be not to mean input media 20 must contact, but represent that its function class is similar to the Trackpad of prior art, Touch Screen etc. with touch-control surface 141.
After the image sensing module 16 acquisition optical information, this information translation can be become electric signal, send treatment circuit 30 to.The application scenario of optometry contactor control device 10 and deciding, the output signal of treatment circuit 30 can be made different purposes, for example, when optical touch control apparatus 10 was Trackpad on the notebook computer, the output signal of treatment circuit 30 can move in order to the cursor on the control display screen curtain 40 41; When optical touch control apparatus 10 is touch control screen on the ATM (Automatic Teller Machine), can move in order to control other device (not shown), for example account transfer etc.
The optical information that image sensing module 16 is captured is two-dimensional signal; When moving, very abundant as only calculating moving on the two dimensional surface, for example controlling cursor 41 merely.If need move according to the three-dimensional of input media 20 other function is provided, for example on the screen menu, select, then plural sensor can be set in image sensing module 16, and according to focal length of the relative distance between the image that is received, two sensors, sensor etc., the three-dimensional that calculates input media 20 moves.In detail, as shown in Figure 2, the center position of supposing left and right sides two sensors is T, and the focusing distance of sensor is f, comprises certain object in the image, and the x coordinate of this object in left sensor gained bidimensional image is x
l, the x coordinate in right-hand sensor gained bidimensional image is x
r(suppose that the center with sensor is initial point, then x
rLeft in right-hand center sensor position is so be negative value), and the distance of this object distance sensor is Z, then according to the similar triangles theorem,
x
l/ f=X/Z, and-x
r/ f=(T-X)/Z
So can obtain the three-dimensional information of this object:
X＝(T×x
l)/(x
l-x
r)
Y=(T * y
l)/(x
l-x
r) (y wherein
lNot shown in the drawings)
Z＝f×[T/(x
l-x
r)]
By this mode, can produce the three-dimensional information of object.
Certainly, above account form only is one of feasible practice, except that the above mode, also can adopt alternate manner to calculate three-dimensional information.How calculating three-dimensional information, is not emphasis of the present invention, so will not give unnecessary details all possible practice and details.Emphasis is that the existing contactor control device of the present invention provides the information of another dimension more, makes utilization property more extensive.
See also Fig. 3, this is an alternative embodiment of the invention.The optical touch control apparatus 10 of present embodiment is except that comprising light source 12, light guide module 14, image sensing module 16, and other comprises lens module 15, and feedback control circuit 17.Can comprise one or more lens 151-152 in the lens module 15, catch image more accurately to assist image sensing module 16.The effect of feedback control circuit 17 is to adjust the brightness of light source 12.When light that image sensing module 16 senses too a little less than so that during the sensing poor effect, feedback control circuit 17 can be according to the situation of image sensing module 16, the brightness of feedback adjusting light source 12.
In above-mentioned Fig. 1 and Fig. 3, input media 20 is plotted much smaller than touch-control surface 141, but the area of this non-expression input media 20 must be less than the area of touch-control surface 141.Fig. 4 marks an alternative embodiment of the invention, as shown in the figure, the input media 20 in the present embodiment (for example being finger), its area can cover the major part or the entire area of touch-control surface 141.Move (for example mobile variation of fingerprint) by detecting input media 20 picture on surface just can produce two dimension or three-dimensional information, for for example controlling cursor, selecting the option etc. in the menu.Because input media 20 can cover most of area of touch-control surface 141, therefore in the present embodiment, not absolute necessity is provided with touch-control surface 141, that is this place can only be a perforate on the casing 11.No matter whether touch-control surface 141 is set or perforate only is provided, all can be in this position extraction optical information.In some cases, provide the effect of touch-control surface 141 to be mainly and prevent that extraneous dust from falling into internal body and polluting; Moving of convenient identification input media 20 instead is less important.Under other some situation, touch-control surface 141 itself is the some of the button that can push, so that other control function to be provided; This moment, the function as button was main, and the function of convenient identification input media 20 instead is less important.
In the embodiment shown in fig. 4, in order further to dwindle the volume of whole optical touch control apparatus, light guide module 14 and lens module 15 can be integrated into one.Certainly, the design of view apparatus itself and deciding also can separate it, or lens module 15 is not set.
The optical touch control apparatus of Fig. 4 for example can be applicable in more small-sized electronic installation such as mobile phone, personal digital assistant, portable type music player etc.; Fig. 5 marks one of them application examples, optical touch control apparatus can be arranged on (not shown) within the mobile phone, and touch-control surface 141 or perforate then for example can be arranged on the below of handset displays screen, the top of button.
Below at preferred embodiment the present invention is described, but the above for making those skilled in the art be easy to understand content of the present invention, is not to be used for limiting interest field of the present invention only.For those skilled in the art, when can in spirit of the present invention, thinking immediately and various equivalence variation.For example, each shown element can add other add ons that does not influence its major function betwixt; Though treatment circuit 30 illustrates the outer member into optical touch control apparatus 10, also can be integrated into inner member; But input signal self imaging sensing module 16 acquisitions of feedback control circuit 17 also can be handled circuit 30 acquisitions certainly, or the like.All this kind, the possibility that has various equivalences to change.So all equalizations of doing according to notion of the present invention and spirit change or modify, and all should be included in the claim scope of the present invention.
Claims (19)
1. an optical touch control apparatus is characterized in that, comprises:
One light source, the projection linear light;
One light guide module, contain optical information extraction position, this light guide module can be transformed into planar light with the linear light of this light source projects, and this planar-light guide is caused on this optical information extraction position, and produces optical information according to the light from this optical information extraction position input or reflection; And
One image sensing module, the optical information that its this light guide module of sensing is produced, and produce electric signal according to this optical information, this electric signal exports a treatment circuit to, to produce three-dimensional information, wherein this image sensing module is positioned at the side of this light guide module
And wherein, this image sensing module has two sensors, and its center position is T, and the focusing distance of sensor is f, and then this three-dimensional information calculates acquisition according to following mode:
X＝(T×x
l)/(x
l-x
r)
Y＝(T×y
l)/(x
l-x
r)
Z＝f×[T/(x
l-x
r)]
X wherein
l, y
lFor one of them sensor is an initial point gained two-dimensional coordinate with the center of this sensor, x
r, y
rFor another sensor is an initial point gained two-dimensional coordinate with the center of this sensor.
2. optical touch control apparatus as claimed in claim 1, wherein, this light source is an infrared light sources.
3. optical touch control apparatus as claimed in claim 1 wherein, more includes an input media, and the some of this input media is reflective material.
4. optical touch control apparatus as claimed in claim 1 wherein, more includes one group of lens, is arranged between this light guide module and this image sensing module.
5. optical touch control apparatus as claimed in claim 1 wherein, more includes one group of lens, is arranged between this light guide module and this optical information extraction position.
6. as claim 4 or 5 described optical touch control apparatus, wherein, these group lens and this light guide module are integrated into one.
7. optical touch control apparatus as claimed in claim 2 wherein, more includes a feedback control circuit, according to the optical information that this light guide module produced, and the brightness of this light source of FEEDBACK CONTROL.
8. optical touch control apparatus as claimed in claim 7, wherein, this feedback control circuit receives signal from this image sensing module, or this treatment circuit receives signal certainly.
9. optical touch control apparatus as claimed in claim 1, wherein, this optical information extraction position is a surface, or a perforate.
10. optical touch control apparatus as claimed in claim 1, wherein, this optical information extraction position is a surface, and this surface is the some of a depressible button.
11. optical touch control apparatus as claimed in claim 1, wherein, most of at least area of this optical information extraction position can be finger or an input media covers.
12. the control method of an optical touch control apparatus is characterized in that, comprises:
The projection linear light;
One light guide module is provided, and it contains optical information extraction position, and this light guide module is transformed into planar light with this linear light, and this planar-light guide is caused on this optical information extraction position;
Make this light guide module produce optical information according to light from this optical information extraction position input or reflection; And
The optical information that is produced from the side of this light guide module this light guide module of sensing, and produce electric signal according to this optical information,
Wherein, this light guide module has an inclined-plane on this optical information extraction opposite, position, and is projected to this inclined-plane from the light of this optical information extraction position input or reflection and reflects and produce this optical information.
13. control method as claimed in claim 12, wherein, this light guide module section is trapezoidal, and this linear light is infrared light sources, and projection is from this below, inclined-plane.
14. control method as claimed in claim 13 wherein, more comprises: produce the feedback signal according to this optical information, control ultrared irradiation brightness with feedback.
15. control method as claimed in claim 12 wherein, more comprises:, control the cursor on the display device according to this electric signal.
16. control method as claimed in claim 12 wherein, more comprises:, produce three-dimensional information according to this electric signal.
17. control method as claimed in claim 12 wherein, more comprises:, on the optical information extraction position of this light guide module, move so that small part is the object of reflective material.
18. control method as claimed in claim 12, wherein, this optical information extraction position is a surface, or a perforate.
19. control method as claimed in claim 12, wherein, most of at least area of this optical information extraction position can be finger or an input media covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101932164A CN101441540B (en) | 2007-11-20 | 2007-11-20 | Optical touch control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101932164A CN101441540B (en) | 2007-11-20 | 2007-11-20 | Optical touch control apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101441540A CN101441540A (en) | 2009-05-27 |
| CN101441540B true CN101441540B (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101932164A Expired - Fee Related CN101441540B (en) | 2007-11-20 | 2007-11-20 | Optical touch control apparatus |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI409677B (en) * | 2008-11-28 | 2013-09-21 | Elan Microelectronics Corp | Illuminated touchpad module and illuminated device thereof |
| CN101957690B (en) * | 2009-07-16 | 2012-07-04 | 瑞鼎科技股份有限公司 | Optical touch device and operation method thereof |
| CN101957691B (en) * | 2009-07-20 | 2013-03-20 | 瑞鼎科技股份有限公司 | Optical touch control system and operating method thereof |
| TWI470508B (en) | 2009-08-12 | 2015-01-21 | Au Optronics Corp | Touch panel and touch display device having the same |
| CN101995999B (en) * | 2009-08-20 | 2012-08-22 | 瑞鼎科技股份有限公司 | Optical touch device |
| CN101667084B (en) * | 2009-08-24 | 2014-07-23 | 友达光电股份有限公司 | Touch panel and touch display device provided with touch panel |
| CN101634919B (en) * | 2009-09-01 | 2011-02-02 | 北京途拓科技有限公司 | Device and method for identifying gestures |
| CN102096521B (en) * | 2009-12-14 | 2012-12-26 | 中强光电股份有限公司 | Optical touch device and optical touch display device |
| CN102163103B (en) * | 2010-02-22 | 2014-09-17 | 宏碁股份有限公司 | Touch input method and touch input device |
| CN102163104A (en) * | 2010-02-22 | 2011-08-24 | 宏碁股份有限公司 | Optical touch display apparatus and method thereof |
| TWI409679B (en) | 2010-06-04 | 2013-09-21 | Au Optronics Corp | Optical touch panel and touch display panel and touch input method thereof |
| CN101887328B (en) * | 2010-07-06 | 2012-07-04 | 友达光电股份有限公司 | Optical touch panel, touch display device and touch input method thereof |
| CN101887331B (en) * | 2010-07-09 | 2011-12-07 | 友达光电股份有限公司 | Optical information sampling method and touch information identification method |
| CN102207817A (en) * | 2010-07-29 | 2011-10-05 | 鸿富锦精密工业（深圳）有限公司 | Electronic reading device and cursor control method thereof |
| CN102467296B (en) * | 2010-11-02 | 2014-11-05 | 原相科技股份有限公司 | Optical sensing system |
| CN102521829A (en) * | 2011-11-22 | 2012-06-27 | 无锡海森诺科技有限公司 | Optical touch image calibrating method |
| CN103677437A (en) * | 2012-09-10 | 2014-03-26 | 原相科技股份有限公司 | Optical touch device and brightness correction device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5712656A (en) * | 1994-08-08 | 1998-01-27 | Sharp Kabushiki Kaisha | Graphic drawing apparatus |
| US6166370A (en) * | 1996-05-14 | 2000-12-26 | Michel Sayag | Method and apparatus for generating a control signal |
| CN1358047A (en) * | 2000-08-21 | 2002-07-10 | 株式会社日立制作所 | Pointer unit and portable information terminal with pointer unit |
-
2007
- 2007-11-20 CN CN2007101932164A patent/CN101441540B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5712656A (en) * | 1994-08-08 | 1998-01-27 | Sharp Kabushiki Kaisha | Graphic drawing apparatus |
| US6166370A (en) * | 1996-05-14 | 2000-12-26 | Michel Sayag | Method and apparatus for generating a control signal |
| CN1358047A (en) * | 2000-08-21 | 2002-07-10 | 株式会社日立制作所 | Pointer unit and portable information terminal with pointer unit |
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| Publication number | Publication date |
|---|---|
| CN101441540A (en) | 2009-05-27 |
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