CN101907955A - Optical touch panel - Google Patents
Optical touch panel Download PDFInfo
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- CN101907955A CN101907955A CN 201010228189 CN201010228189A CN101907955A CN 101907955 A CN101907955 A CN 101907955A CN 201010228189 CN201010228189 CN 201010228189 CN 201010228189 A CN201010228189 A CN 201010228189A CN 101907955 A CN101907955 A CN 101907955A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 172
- 239000000758 substrate Substances 0.000 claims abstract description 91
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- 238000010586 diagram Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 4
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Abstract
The invention provides an optical touch panel. The optical touch panel comprises a substrate, three optical members, a light-turning member and two light sensors, wherein the three optical members are configured on the substrate and adjoin; the three optical members are arranged on the edge of the substrate; the light-turning member is configured on one side of the substrate, a touch area is formed between the light-turning member and the optical members above the substrate; the two light sensors are configured under the substrate, separately positioned on the opposite two ends of one side of the substrate and arranged relatively to the light-turning member; and the two light sensors capture the images of the touch area through the light-turning member. By configuring the light sensors and the light-turning member, the accuracy of judging touch position can be increased.
Description
Technical field
The invention relates to a kind of optical touch control panel, and particularly relevant for a kind of optical touch control panel of convert light travel path.
Background technology
Because the easy to operate and rich intuitive of touch-control screen, therefore, the touch-control screen is applied in the various electronic installations in large quantities, for example is portable electric device, desktop computer or cash machine.At present, the touch-control screen can be divided into resistance-type, condenser type, ultrasonic formula and optical touch control screen according to the sensing principle regions.
With the optical touch control screen, the optical touch control screen comprises substrate, light source, sensor and Touch Zone.In general, light source, sensor and Touch Zone all are positioned at the top of substrate, and light source and sensor are positioned at by the Touch Zone.When the object of finger that for example is not to use the person or pointer was positioned at the Touch Zone, the light of the part that light source sent was blocked by object.Thus, according to the received image of sensor, the position of touch of object position in the Touch Zone can judge.
Yet because sensor is positioned at by the Touch Zone, therefore, when object during too near sensor, object reflection ray in large quantities makes to be easy to generate mistake in the judgement of position of touch to sensor.In addition, in order to improve the reconnaissance range of sensor, the visual angle of sensor often needs to increase, and makes the received image of sensor may produce distortion, and the accuracy of position of touch is judged in influence.Therefore, how providing a kind of optical touch control screen that increases the accuracy of judging position of touch, is one of problem of making great efforts for relevant dealer.
Summary of the invention
At above-mentioned technical matters, the present invention mainly provides a kind of optical touch control panel, and its configuration that sees through OPTICAL SENSORS and light tumbler improves increases the accuracy of judging position of touch.Because OPTICAL SENSORS is positioned at the below of substrate, and the Touch Zone is positioned at the top of substrate, and therefore, OPTICAL SENSORS is crossed reflective closely in large quantities situation because of object and can be avoided, to increase the accuracy of judging position of touch.Moreover, seeing through the configuration of light tumbler, the visual angle of OPTICAL SENSORS can dwindle, and the accuracy of position of touch is judged in influence to avoid image to produce distortion.
According to the present invention, a kind of optical touch control panel is proposed, comprise substrate, three optical elements, light tumbler and two OPTICAL SENSORS.These three optical elements are disposed at the top of substrate, and adjoin each other.These three optical elements are arranged at the edge of substrate.The light tumbler is disposed at a side of substrate, and the light tumbler forms the Touch Zone between three optical elements therewith, and this Touch Zone is positioned at the top of substrate.These two OPTICAL SENSORS are disposed at the below of substrate, lay respectively at the opposite two ends of a side of substrate, and are provided with respect to the light tumbler.These two OPTICAL SENSORS see through the image of light tumbler acquisition Touch Zone.
According to optical touch control panel of the present invention, two optical sensors respectively has the oblique visual field, and these oblique sight planes are to this Touch Zone and crossover, and wherein this two optical sensors only sees through the image that this light tumbler captures this Touch Zone.
According to optical touch control panel of the present invention, optical element is a retroreflector, this optical touch control panel more comprises two light sources, be disposed at the below of this substrate, and be disposed at contiguous this two optical sensors place respectively, this two light source is to produce this light in the below of this substrate, this light tumbler reflects this light to this retroreflector, then, this this light of retroreflector retroeflection makes this OPTICAL SENSORS receive this light to this light tumbler.
According to optical touch control panel of the present invention, optical element is the light source module, and this light source module is to produce this light in the top of this substrate, and this OPTICAL SENSORS sees through this light tumbler and receives this light.
According to optical touch control panel of the present invention, the light tumbler only is arranged on this side with respect to this two optical sensors, and this light tumbler comprises first catoptron and second catoptron.The top that first catoptron and second catoptron are disposed at this substrate respectively reaches with respect under this first catoptron, this first catoptron is arranged between this optical element and this second catoptron, this second catoptron is arranged between this OPTICAL SENSORS and this first catoptron, and the angle between this first catoptron and this second catoptron is essentially 90 degree.
According to optical touch control panel of the present invention, the light tumbler is arranged on the sidewall of this substrate, and comprise first reflecting surface and second reflecting surface, this first reflecting surface is arranged between this optical element and this second reflecting surface, this second reflecting surface is arranged between this OPTICAL SENSORS and this first reflecting surface, and the angle between this first reflecting surface and this second reflecting surface is essentially 90 degree.
According to the present invention, reintroduce a kind of optical touch control panel, comprise substrate, three light source modules, light tumbler and two OPTICAL SENSORS.Substrate forms the Touch Zone.These three light source modules are disposed at the top of substrate, and are arranged at the edge of substrate.The light tumbler is disposed at the side of substrate, and light tumbler three light source module essence therewith surrounds substrate.These two OPTICAL SENSORS are disposed at the below of substrate, lay respectively at the opposite two ends of substrate, and are provided with respect to the light tumbler.These two OPTICAL SENSORS only see through the image of light tumbler acquisition Touch Zone.
According to optical touch control panel of the present invention, two optical sensors respectively has the oblique visual field, and these oblique sight planes are to this Touch Zone and essence crossover.
Also have three light source modules according to optical touch control panel of the present invention, it extends along first side, second side and the 3rd side of this substrate respectively, wherein this light tumbler is arranged at the four side of this substrate, this two optical sensors is arranged at this first side of this substrate, this four side is to being located at this first side, this the second and the 3rd side is adjacent to this first side and this four side, and this three light sources module produces this light in the top of this substrate.
According to optical touch control panel of the present invention, substrate is a rectangular substrate.
By the present invention, the configuration of OPTICAL SENSORS and light tumbler can improve the accuracy of judging position of touch.Because OPTICAL SENSORS is positioned at the below of substrate, and the Touch Zone is positioned at the top of substrate, and therefore, OPTICAL SENSORS is crossed reflective closely in large quantities situation because of object and can be avoided, to increase the accuracy of judging position of touch.Moreover, seeing through the configuration of light tumbler, the visual angle of OPTICAL SENSORS can dwindle, and the accuracy of position of touch is judged in influence to avoid image to produce distortion.
Description of drawings
Figure 1A illustrates the vertical view according to the optical touch control panel of first embodiment of the invention.
Figure 1B illustrates the side view of the optical touch control panel among Figure 1A.
Fig. 2 A illustrates the synoptic diagram that light source among Figure 1B produces the light path behind the light.
Fig. 2 B illustrates the synoptic diagram of the light path of the optical element retroeflection light among Fig. 2 A.
Fig. 3 illustrates the equivalent schematic of the optical touch control panel among Figure 1A.
Fig. 4 illustrates the synoptic diagram that utilizes three angle measurements methods to detect the coordinate figure of position of touch.
Fig. 5 A illustrates the vertical view according to the optical touch control panel of second embodiment of the invention.
Fig. 5 B illustrates the side view of the optical touch control panel among Fig. 5 A.
Fig. 6 illustrates the synoptic diagram that light source among Fig. 5 B produces the light path behind the light.
Fig. 7 illustrates the equivalent schematic of the optical touch control panel among Fig. 5 A.
Embodiment
For making purpose of the present invention, structure, feature and function thereof there are further understanding, cooperate embodiment to be described in detail as follows now.
Please refer to Figure 1A and Figure 1B, Figure 1A illustrates the vertical view according to the optical touch control panel of first embodiment of the invention, and Figure 1B illustrates the side view of the optical touch control panel among Figure 1A.Optical touch control panel 100 comprises substrate 110, three optical elements 120, light tumbler 130 and two optical mode groups 140.
Three optical elements 120 of present embodiment for example are three retroreflector (Retroreflector), are disposed at the top of substrate 110, and adjoin each other.These three optical elements 120 are arranged at the edge of substrate 110.Light tumbler 130 is disposed at a side of substrate 110.Form Touch Zone S1 in the top of substrate 110 between a little therewith optical elements 120 of light tumbler 130.
These two optical mode groups 140 respectively comprise light source 141 and OPTICAL SENSORS 142, and are disposed at the below of substrate 110.In more detail, these two OPTICAL SENSORS 142 lay respectively at the opposite two ends of the opposite side of substrate 110, and are provided with respect to light tumbler 130.In addition, two light sources 141 are disposed at contiguous two OPTICAL SENSORS 142 places respectively, and light is imported Touch Zone S1.These two OPTICAL SENSORS 142 see through the image of light tumbler 130 acquisition Touch Zone S1.
That is to say that when two light sources 141 produced light below substrate 110, light tumbler 130 reflection rays were to optical element (retroreflector) 120.Then, optical element (retroreflector) 120 retroeflection light make OPTICAL SENSORS 142 receive light via light tumbler 130 to light tumbler 130.Because Touch Zone S1 is positioned at the top of substrate 110, and OPTICAL SENSORS 142 is positioned at the below of substrate 110, therefore, all be disposed at the optical touch control screen of the top of substrate compared to Touch Zone and sensor in the past, the OPTICAL SENSORS 142 of present embodiment can be because of for example not being the too approaching position of touch of judging by accident of finger or pointer when capturing the image of Touch Zone S1.
Below further specify the form and the configuration of the light tumbler 130 of present embodiment.130 of light tumblers are arranged on this side with respect to two OPTICAL SENSORS 142, and comprise first catoptron 131 and second catoptron 132.First catoptron 131 is disposed at the top of substrate 110, and second catoptron 132 is disposed at respect under first catoptron 131.First catoptron 131 is arranged between the optical element 120 and second catoptron 132, and second catoptron 132 is arranged between the OPTICAL SENSORS 142 and first catoptron 131.Angle between first catoptron 131 and second catoptron 132 is essentially 90 degree.
Please refer to Fig. 2 A and Fig. 2 B, Fig. 2 A illustrates the synoptic diagram that light source among Figure 1B produces the light path behind the light, and Fig. 2 B illustrates the synoptic diagram of the light path of the optical element retroeflection light among Fig. 2 A.At first, shown in Fig. 2 A, after entering Touch Zone S1, the light that light source 141 produces is projected to second catoptron 132, and second catoptron, 132 reflection ray to the first catoptrons 131.Then, first catoptron, 131 further reflection rays make ray cast to optical element 120.Because the optical element 120 of present embodiment is a retroreflector, therefore, be projected to the light of optical element 120 can be along the path shown in Fig. 2 A oppositely retroeflection to the OPTICAL SENSORS 142 of optical mode group 140, shown in Fig. 2 B.Thus, OPTICAL SENSORS 142 can be judged position of touch by the image of the Touch Zone S1 that receives the light generation.
Please refer to Fig. 3, it illustrates the equivalent schematic of the optical touch control panel among Figure 1A.142 of the OPTICAL SENSORS of present embodiment see through the image of light tumbler 130 acquisition Touch Zone S1.Because the configuration of the light tumbler 130 of present embodiment, therefore, the ray cast scope of the optical mode group 140 of Figure 1A is equivalent to the ray cast scope of optical mode group 140 ' shown in Figure 3 in fact.Furthermore, Deng Xiao two OPTICAL SENSORS 142 ' respectively have an oblique visual field.In Fig. 3, these two oblique visuals field utilize different patterns to fill up the scope of expressing respectively.These two oblique sight planes are to Touch Zone S1 and essence crossover.Thus, can understand by the ray cast scope shown in two OPTICAL SENSORS 142 ' of above-mentioned equivalence, compared to had the sensor that causes deformation of image with great visual angle in the past, the visual angle of the OPTICAL SENSORS 142 of present embodiment can be less, reducing the situation of deformation of image effectively, and promote accuracy in the judgement of position of touch.
As mentioned above, the configuration of the light tumbler 130 of present embodiment makes the ray cast scope of optical mode group 140 (shown in Figure 1A) be equivalent to the ray cast scope of optical mode group 140 ' (as shown in Figure 3) in fact.Therefore, present embodiment is obtained the mechanism of position of touch through the configuration explanation of the optical mode group 140 ' of equivalence.
Please refer to Fig. 4, it illustrates the synoptic diagram that utilizes three angle measurements methods to detect the coordinate figure of position of touch.The object of supposing finger or pointer is positioned at Touch Zone S1, and the central point of object is to represent with a P.The optical mode group 140 ' in left side is positioned at the initial point O place of coordinate system.The optical mode group 140 ' on right side is positioned at the some Q place on the x axle of coordinate system, and the optical element 120 in left side is positioned on the y axle of coordinate system.The left side is L with the spacing of the optical mode group 140 ' on right side.
Putting the line of P and initial point O and the angle of x axle herein for example is angle θ, and line and the angle of x axle of some P and some Q for example be angle φ, then reaches (2) according to following formula (1), and the coordinate figure Px and the Py of the center point P of object can calculate respectively:
Px＝(tanφ)÷(tanθ+tanφ)×L (1)
Py＝(tanθ×tanφ)÷(tanθ+tanφ)×L (2)
Thus, according to three above-mentioned angle measurements methods, the position of touch of object (just putting the coordinate figure of P) can be learnt.
Please refer to Fig. 5 A and Fig. 5 B, Fig. 5 A illustrates the vertical view according to the optical touch control panel of second embodiment of the invention, and Fig. 5 B illustrates the side view of the optical touch control panel among Fig. 5 A.
Compared to first embodiment, three optical elements 220 of the optical touch control panel 200 of present embodiment are different with the form and the configuration mode of light tumbler 130 with three optical elements 120 of the optical touch control panel 100 of the form of light tumbler 230 and the configuration mode and first embodiment.Other and the first embodiment components identical mark with same numeral, and no longer repeat specification.
Three optical elements 220 of optical touch control panel 200 are three light source modules.The edge that these three optical elements 220 are disposed at the top of substrate 110 and are arranged at substrate 110.Three optical elements 220 of present embodiment extend along first side 110s1, second side 110s2 and the 3rd side 110s3 of substrate 110 respectively, in order to produce light.
In present embodiment, light tumbler 230 is arranged at the side of substrate 110, for example is four side 110s4, and further, light tumbler 230 is configured on the sidewall of substrate 110.Thus, these three optical elements 220 surround substrate 110 in fact with light tumbler 230.
Two OPTICAL SENSORS 242 are disposed at the below of substrate 110, lay respectively at the opposite two ends of substrate 110, and are provided with respect to light tumbler 230.That is to say that two OPTICAL SENSORS 242 of present embodiment for example are the first side 110s1 that is arranged at substrate 110, receive the image that light captures Touch Zone S1 ' to see through light tumbler 230.
The mode that OPTICAL SENSORS 242 sees through light tumbler 230 reception light is described as follows.Light tumbler 230 comprises first reflecting surface 231 and second reflecting surface 232.First reflecting surface 231 is arranged between the optical element 220 and second reflecting surface 232, and second reflecting surface 232 is arranged between the OPTICAL SENSORS 242 and first reflecting surface 231.Angle between first reflecting surface 231 and second reflecting surface 232 is essentially 90 degree.Merit attention, light tumbler 230 also can adopt the light tumbler 130 among the last embodiment to reach identical effect in this embodiment.
Please refer to Fig. 6, it illustrates the synoptic diagram that light source among Fig. 5 B produces the light path behind the light.The light system that produces for the optical element 220 of light source module is projected to first reflecting surface 231.Then, first reflecting surface, 231 reflection rays make ray cast to the second reflecting surface 232.Thus, second reflecting surface 232 further reflects, and makes ray cast to OPTICAL SENSORS 242.Thus, OPTICAL SENSORS 242 can receive light and judges it for example is that finger or pointer are positioned at the position of touch of Touch Zone S1 '.
In addition, please refer to Fig. 7, it illustrates the equivalent schematic of the optical touch control panel among Fig. 5 A.242 of the OPTICAL SENSORS of present embodiment see through the image of light tumbler 230 acquisition Touch Zone S1 '.The configuration of the light tumbler 230 of present embodiment can provide the function of the light tumbler 130 that is similar to first embodiment, makes the ray cast scope of OPTICAL SENSORS 242 can be equivalent to the ray cast scope of OPTICAL SENSORS 242 ' as shown in Figure 7 in fact.Furthermore, Deng Xiao two OPTICAL SENSORS 242 ' respectively have the oblique visual field.In Fig. 7, the scope in these two oblique visuals field utilizes different patterns to fill up the scope of expressing respectively.These two oblique sight planes are to Touch Zone S1 ' and essence crossover.Thus, can understand by the ray cast scope shown in two OPTICAL SENSORS 242 ' of above-mentioned equivalence, compared to had the sensor that causes deformation of image with great visual angle in the past, the visual angle of the OPTICAL SENSORS 242 of present embodiment can be less, reducing the situation of deformation of image effectively, and promote accuracy in the judgement of position of touch.
In addition, object can for example be to learn no longer repeat specification herein according to three angle measurements methods described in first embodiment in the position of touch of the Touch Zone S1 ' of the optical touch control panel 200 of present embodiment.
The disclosed optical touch control panel of the above embodiment of the present invention, its configuration that sees through OPTICAL SENSORS and light tumbler improves increases the accuracy of judging position of touch.Because the touch-control fauna is positioned at the top of substrate, and OPTICAL SENSORS is disposed at the below of substrate, and therefore, OPTICAL SENSORS is crossed reflective closely in large quantities situation because of object and can be avoided, to increase the accuracy of judging position of touch.Moreover, seeing through the configuration of light tumbler, the visual angle of OPTICAL SENSORS can dwindle, and the accuracy of position of touch is judged in influence to avoid image to produce distortion.
The present invention is described by above-mentioned related embodiment, yet the foregoing description is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, change of being done and retouching without departing from the spirit and scope of the present invention all belongs to scope of patent protection of the present invention.
Claims (10)
1. optical touch control panel is characterized in that comprising:
Substrate;
Three optical elements are disposed at the top of this substrate, and adjoin each other, and these optical elements are arranged at the edge of this substrate;
The light tumbler is disposed at a side of this substrate, forms the Touch Zone between this light tumbler and this three optical element, and this Touch Zone is positioned at the top of this substrate; And
Two optical sensors is disposed at the below of this substrate, lays respectively at the opposite two ends of a side of this substrate, and is provided with respect to this light tumbler, and this two optical sensors sees through the image that this light tumbler captures this Touch Zone.
2. optical touch control panel as claimed in claim 1 is characterized in that this two optical sensors respectively has the oblique visual field, and these oblique sight planes are to this Touch Zone and crossover, and wherein this two optical sensors only sees through the image that this light tumbler captures this Touch Zone.
3. optical touch control panel as claimed in claim 1, it is characterized in that this optical element is a retroreflector, this optical touch control panel also comprises two light sources, be disposed at the below of this substrate, and be disposed at contiguous this two optical sensors place respectively, this two light source is to produce this light in the below of this substrate, this light tumbler reflects this light to this retroreflector, then, this this light of retroreflector retroeflection makes this OPTICAL SENSORS receive this light to this light tumbler.
4. optical touch control panel as claimed in claim 1 is characterized in that this optical element is the light source module, and this light source module is to produce this light in the top of this substrate, and this OPTICAL SENSORS sees through this light tumbler and receives this light.
5. optical touch control panel as claimed in claim 1 is characterized in that this light tumbler only is arranged on this side with respect to this two optical sensors, and this light tumbler comprises:
First catoptron and second catoptron, the top that is disposed at this substrate respectively reaches with respect under this first catoptron, this first catoptron is arranged between this optical element and this second catoptron, this second catoptron is arranged between this OPTICAL SENSORS and this first catoptron, and the angle between this first catoptron and this second catoptron is 90 degree.
6. optical touch control panel as claimed in claim 1, it is characterized in that this light tumbler is arranged on the sidewall of this substrate, and comprise first reflecting surface and second reflecting surface, this first reflecting surface is arranged between this optical element and this second reflecting surface, this second reflecting surface is arranged between this OPTICAL SENSORS and this first reflecting surface, and the angle between this first reflecting surface and this second reflecting surface is 90 degree.
7. optical touch control panel is characterized in that comprising:
Substrate forms the Touch Zone;
Three light source modules are disposed at the top of this substrate, and these light source modules are arranged at the edge of this substrate;
The light tumbler is disposed at the side of this substrate, and this light tumbler and this three light sources module surround this substrate; And
Two optical sensors is disposed at the below of this substrate, lays respectively at the opposite two ends of this substrate, and is provided with respect to this light tumbler, and this two optical sensors only sees through the image that this light tumbler captures this Touch Zone.
8. optical touch control panel as claimed in claim 7 is characterized in that this two optical sensors respectively has the oblique visual field, and these oblique sight planes are to this Touch Zone and crossover.
9. optical touch control panel as claimed in claim 7, it is characterized in that also having three light source modules, it extends along first side, second side and the 3rd side of this substrate respectively, wherein this light tumbler is arranged at the four side of this substrate, this two optical sensors is arranged at this first side of this substrate, this four side is to being located at this first side, and this second side and the 3rd side are adjacent to this first side and this four side, and this three light sources module produces this light in the top of this substrate.
10. optical touch control panel as claimed in claim 9 is characterized in that this substrate is a rectangular substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102281891A CN101907955B (en) | 2010-06-29 | 2010-06-29 | Optical touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102281891A CN101907955B (en) | 2010-06-29 | 2010-06-29 | Optical touch panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101907955A true CN101907955A (en) | 2010-12-08 |
| CN101907955B CN101907955B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102281891A Expired - Fee Related CN101907955B (en) | 2010-06-29 | 2010-06-29 | Optical touch panel |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103092429A (en) * | 2011-11-02 | 2013-05-08 | 时代光电科技股份有限公司 | Method and device determining positions of objects |
| CN103324358A (en) * | 2012-03-22 | 2013-09-25 | 广达电脑股份有限公司 | Optical Touch System |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982000911A1 (en) * | 1980-08-29 | 1982-03-18 | M Kassies | Real image projection device |
| CN101149658A (en) * | 2007-11-05 | 2008-03-26 | 天津大学 | Photoelectric touch-screen |
| CN101153972A (en) * | 2006-09-26 | 2008-04-02 | Lg.菲利浦Lcd株式会社 | Display with infrared backlight source and multi-touch sensing function |
| CN101349958A (en) * | 2007-07-17 | 2009-01-21 | 义发科技股份有限公司 | Luminous touch control plate and control system having the same |
-
2010
- 2010-06-29 CN CN2010102281891A patent/CN101907955B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982000911A1 (en) * | 1980-08-29 | 1982-03-18 | M Kassies | Real image projection device |
| CN101153972A (en) * | 2006-09-26 | 2008-04-02 | Lg.菲利浦Lcd株式会社 | Display with infrared backlight source and multi-touch sensing function |
| CN101349958A (en) * | 2007-07-17 | 2009-01-21 | 义发科技股份有限公司 | Luminous touch control plate and control system having the same |
| CN101149658A (en) * | 2007-11-05 | 2008-03-26 | 天津大学 | Photoelectric touch-screen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103092429A (en) * | 2011-11-02 | 2013-05-08 | 时代光电科技股份有限公司 | Method and device determining positions of objects |
| CN103092429B (en) * | 2011-11-02 | 2015-10-14 | 音飞光电科技股份有限公司 | Measure the device and method of object space |
| CN103324358A (en) * | 2012-03-22 | 2013-09-25 | 广达电脑股份有限公司 | Optical Touch System |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101907955B (en) | 2012-11-21 |
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