CN104007883B - Locating-improved optical touch electronic whiteboard and locating method thereof - Google Patents
Locating-improved optical touch electronic whiteboard and locating method thereof Download PDFInfo
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- CN104007883B CN104007883B CN201410273644.8A CN201410273644A CN104007883B CN 104007883 B CN104007883 B CN 104007883B CN 201410273644 A CN201410273644 A CN 201410273644A CN 104007883 B CN104007883 B CN 104007883B
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- optical sensor
- sensor equipment
- angle
- display surface
- electronic whiteboard
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Abstract
The invention discloses a locating-improved optical touch electronic whiteboard which comprises a screen component, optical sensing devices and light source equipment. The screen component comprises a rectangular displaying face. The number of the optical sensing devices is two. The two optical sensing devices are at the two ends of a horizontal side of the displaying face respectively. Non-zero included angles are formed between the optical sensing devices and the displaying face. The light source equipment comprises light-emitting components and light reflecting components. The two light-emitting components are arranged at the two optical sensing devices and are toward the center of the displaying face. The number of the light reflecting components is three. The three light reflecting components are arranged on the two vertical sides of the displaying face and a horizontal side where the optical sensing devices are not arranged respectively. According to the locating-improved optical touch electronic whiteboard, an accurate locating calibration operation opportunity can be provided, and the sensing sensitivity and the judging accuracy of a touch point close to the connecting wire between the two groups of optical sensing devices can be improved.
Description
Technical field
The present invention relates to a kind of position improved optical touch electronic whiteboard and its localization method, belong to smart electronicses product
Technical field.
Background technology
Optical electron blank is up-to-date a kind of product in current electronic whiteboard industry, and the optical touch that it adopts controls skill
Art, its principle is mainly respectively provided with two optical sensor equipment by the two ends of certain a line in electronic whiteboard, common
In the upper left corner of electronic whiteboard and the upper right corner, respectively an optical sensor equipment is set, positioned at the optical sensor in the electronic whiteboard upper left corner
Equipment can sense touch control operation object（The finger of user or pointer）Line with itself and vertical direction or water
Square to angle a, the optical sensor equipment positioned at the electronic whiteboard upper right corner equally with sense touch control operation object with its
The line of body and the angle b of vertical direction or horizontal direction, the value that system passes through to gather angle a and angle b can obtain touch-control
The positional information of operation object, thus realize correctly entering of instruction.The advantage of optics touch screen blank is：First in reaction speed
Degree and touch precision aspect, optics touch screen blank is better than the touch-control blank such as infrared, surface acoustic wave and touch screens；Secondly in chi
On very little, optics touch screen blank size can accomplish more than 250 cun, and its cost of manufacture of larger will not significantly increase therewith
Plus.Existing optical electron blank needs regularly to carry out positioning calibration operation, shows multiple standard points by screen assembly,
User touches each standard point successively, and touch location is mapped thus realizing positioning by optical whiteboard automatically with standard point coordinate
Calibration, but when above-mentioned positioning calibration operation needs to carry out lacking accurate foundation；Additionally, for close to two groups of optics senses
Answer the touch point of line between equipment, because angle changing is more trickle, the therefore susceptiveness of optical sensor equipment and judgement is accurate
Exactness is relatively low.
Content of the invention
The present invention exactly in view of the shortcomings of the prior art, provides a kind of positioning improved optical touch electronic whiteboard,
On the one hand accurate positioning calibration operation opportunity can be provided, on the other hand can improve between two groups of optical sensor equipment
The sensing susceptiveness of the touch point of line and accuracy of judgement degree.
For solving the above problems, the technical solution used in the present invention is as follows：
A kind of improved optical touch electronic whiteboard of positioning, including：
Display device, optical sensor equipment and light source；
Described display device includes screen assembly, and described screen assembly includes the display surface of rectangle and is located at display surface front portion
Sensing space；
Described optical sensor equipment is two and is respectively arranged at the two ends of described one horizontal sides of display surface, and two institutes
State optical sensor equipment and described display surface is respectively provided with the angle of non-zero；
Described light source includes luminescence component and reflecting assembly, and described luminescence component is two and all towards described display
The center in face, being respectively arranged at two described optical sensor equipment of two described luminescence components；Described reflecting assembly is three
Two vertical edges that are individual and being respectively arranged at described display surface and being not provided with horizontal sides of described optical sensor equipment, institute
State the reflective surface of reflecting assembly all towards the inner side of described display surface in order to reflect the light that described luminescence component sends.
When at least one touch control operation object enters sensing space, each optical sensor apparatus senses exist to touch control operation object
Caused light in sensing space changes and produces two signals, and the either signal in two signals all comprises two numbers
According to：Touch control operation object and the line of optical sensor equipment and the angle m of vertical direction or horizontal direction and touch control operation object
With the angle n of the line of optical sensor equipment and display surface, therefore arbitrary optical sensor equipment collection of actually said structure
Signal can determine the position of touch control operation object, it is contemplated that the change of n is more trickle, therefore judgment accuracy and
Credibility is not high, so still adopting m value in two signals to determine the position of touch control operation object, the n value in two signals is used
In inspection Position location accuracy.
Herein all it is related to " line of touch control operation object and optical sensor equipment and vertical direction or horizontal direction
Angle m " the words, all it should be understood that：The line of optical sensor equipment " touch control operation object with ", " vertical direction or
Horizontal direction（Actually refer to the normal of vertical direction or horizontal direction）", " angle m " this three be coplanar, and this three
Coplanar with described display surface or parallel.If m value is chosen as " touch control operation object and the line of optical sensor equipment and vertically side
To angle ", then herein m value be all " the line of touch control operation object and optical sensor equipment and vertically just from start to finish
To angle "；If m value is chosen as " line of touch control operation object and optical sensor equipment and the angle of horizontal direction ", that
M value is all " line of touch control operation object and optical sensor equipment and the angle of horizontal direction " from start to finish herein.
As the improvement of technique scheme, two described optical sensor equipment are respectively provided with two number of degrees not with horizontal plane
The first same angle and the second angle, described first angle range of degrees is 15 °～45 °, and described second angle range of degrees is
45 °～75 °.
Present invention also offers the localization method of the improved optical touch electronic whiteboard of above-mentioned positioning, comprise the steps：
First, two optical sensor equipment（2）Respectively the line of sensing touch control operation object and optical sensor equipment with vertically
Angle m1, m2 of direction or horizontal direction, and the line of touch control operation object and optical sensor equipment and the angle of display surface
n1、n2；
2nd,（m1、m2）As reading value to analyze and to judge the position of touch control operation object,（m1、n1）、（m2、n2）Make
For test value to analyze and to judge the credibility of reading value.
Compared with prior art, the implementation result of the present invention is as follows for the present invention：
A kind of improved optical touch electronic whiteboard of positioning of the present invention, by making optical sensor equipment aobvious with described
Show that face is respectively provided with the angle of non-zero so that the touch control operation objective direction information that optical sensor equipment collects is no longer one
Individually angle value is one-dimension information, but has a two-dimensional signal of two angle values, such that it is able in analysis touch-control behaviour
While making object space, above-mentioned precision of analysis is tested, thus requiring to be positioned on suitable opportunity
Calibration operation；Additionally, being respectively provided with two number of degrees by further improving i.e. two described optical sensor equipment with horizontal plane
The first different angles and the second angle, also overcome the touch point for line between two groups of optical sensor equipment, by
More trickle in angle changing, the therefore susceptiveness of optical sensor equipment and the relatively low problem of accuracy of judgement degree.
Brief description
Fig. 1 is a kind of structural representation positioning improved optical touch electronic whiteboard of the present invention；
Fig. 2 is the structural representation of A A section in Fig. 1.
Specific embodiment
Present disclosure to be described below in conjunction with specific embodiments.
As depicted in figs. 1 and 2, it is a kind of improved optical touch electronic whiteboard structural representation of positioning of the present invention
Figure.Include for a kind of improved optical touch electronic whiteboard of positioning of the present invention：Display device, optical sensor equipment 2 and
Light source；Described display device includes screen assembly 11, and described screen assembly 11 includes the display surface of rectangle and is located at display
The sensing space in portion in front；Described optical sensor equipment 2 is two and is respectively arranged at the two of described one horizontal sides of display surface
End, and two described optical sensor equipment 2 and described display surface are respectively provided with the angle of non-zero（Angle 23 in Fig. 2 and angle 24,
The number of degrees of obvious angle 23 and angle 24 can be identical can also be different）；Described light source includes luminescence component
31 and reflecting assembly 32, described luminescence component 31 is two and all towards the center of described display surface, two described luminescence components
31 be respectively arranged at two described optical sensor equipment 2；Described reflecting assembly 32 is three and is respectively arranged at described aobvious
Show two vertical edges in face and be not provided with horizontal sides of described optical sensor equipment 2, described reflecting assembly 32 reflective
Face is all towards the inner side of described display surface in order to reflect the light that described luminescence component 31 sends.
During work, the optical sensor equipment 2 on the left side can obtain bearing data m1 and n1 of touch control operation object, the light on the right
Learn bearing data m2 and n2 that sensing apparatus 2 can obtain touch control operation object, wherein（m1、m2）For the touch control operation thing determining
Body position is the most accurate,（m1、n1）、（m2、n2）Secondly,（n1、n2）Worst.Therefore can select（m1、m2）As reading value
（Carry out position analyses and judgement according to this value）, select（m1、n1）、（m2、n2）For test value（I.e. this value be only used for analysis and
Judge the credibility of reading value）, when（m1、m2）、（m1、n1）、（m2、n2）When three groups of data defined location differences are excessive, can
To send positioning calibration operation prompting.
Same as the prior artly, a kind of improved optical touch electronic whiteboard of described positioning specifically also includes：Drive
Equipment, power supply unit, loudspeaker apparatus.
Described driving equipment includes running the processor of Android system（It can be specifically MST801 chip）With liquid crystal electricity
Depending on decoding chip；Described processor includes exporting the HDMI signal output part of HDMI signal, UART interface, USB interface；Institute
State LCD TV decoding chip and include UART interface, the HDMI interface of HDMI signal receiving described processor output, audio frequency
Signal output part and Low Voltage Differential Signal outfan；Described processor and LCD TV decoding chip pass through respective UART
Interface communication connects；Display device is electrically connected with the USB interface of processor；Described processor and LCD TV decoding chip
HDMI interface is electrically connected with the HDMI signal output part of described processor.Additionally, described LCD TV decoding chip is acceptable
Some signal receiving interfaces are set, and described signal receiving interface can be selected from Tuner interface, the reception video receiving TV signal
One or more of D-SUB interface of the AV interface of signal and reception VGA signal.
Specifically, described optical sensor equipment 2 specifically includes CMOS photographic head and signal processing circuit, described signal
The signal that process circuit electrically connects described CMOS photographic head and described CMOS photographic head is received is analyzed processing and true
The fixed position signalling corresponding with touch, described signal processing circuit is also electrically connected with the USB interface of described processor；
Described luminescence component 31 can be infrared transmitting tube, and described luminescence component 31 also includes drive circuit, described drive circuit electricity
Connect described infrared transmitting tube and scan round signal is sent to described infrared transmitting tube.
Described display device also includes LVDS interface, the low pressure of described LVDS interface and described LCD TV decoding chip
Differential signal outputs electrically connect；Described loudspeaker apparatus are electrically connected with the audio signal output end of described LCD TV decoding chip
Connect；Control the operation of described display device and loudspeaker apparatus by described driving equipment.
In conventional electronic whiteboard, two optical sensor equipment have identical angle with horizontal plane, and usually 45 °, therefore
For the touch point of line between two groups of optical sensor equipment, because angle changing is more trickle, therefore optical sensor sets
Standby susceptiveness and accuracy of judgement degree are relatively low.For this reason, the present invention proposes to improve further on the basis of aforementioned basic structure：Make
Two described optical sensor equipment 2 are respectively provided with two the first different angles 21 of the number of degrees and the second angle 22, institute from horizontal plane
State the first angle 21 range of degrees and be 15 °～45 °, described second angle 22 range of degrees is 45 °～75 °.Said structure can
The touch point for line between two groups of optical sensor equipment making, the angle changing of at least one optical sensor equipment 2
It is more it will be evident that thus improving susceptiveness and the accuracy of judgement degree of optical sensor equipment.
Above content is made for the present invention in conjunction with specific embodiments detailed description in detail it is impossible to assert that the present invention is specifically real
Apply and be only limitted to these explanations.For those skilled in the art, before without departing from present inventive concept
Put, some simple deduction or replace can also be made, all should be considered as belonging to the scope of protection of the invention.
Claims (2)
1. a kind of improved optical touch electronic whiteboard of positioning, is characterized in that, including：
Display device, optical sensor equipment（2）And light source；
Described display device includes screen assembly（11）, described screen assembly（11）Display surface including rectangle and be located at display surface
Anterior sensing space；
Described optical sensor equipment（2）For two and be respectively arranged at the two ends of described one horizontal sides of display surface, and two institutes
State optical sensor equipment（2）It is respectively provided with the angle of non-zero with described display surface；
Described light source includes luminescence component（31）And reflecting assembly（32）, described luminescence component（31）For two and equal direction
The center of described display surface, two described luminescence components（31）Be respectively arranged at two described optical sensor equipment（2）Place；Institute
State reflecting assembly（32）For three and be respectively arranged at two vertical edges of described display surface and be not provided with described optical sensor and set
Standby（2）Horizontal sides on, described reflecting assembly（32）Reflective surface all towards described display surface inner side in order to reflect
State luminescence component（31）The light sending；
Two described optical sensor equipment（2）It is respectively provided with two the first different angles of the number of degrees from horizontal plane（21）With the second folder
Angle（22）, described first angle（21）Range of degrees is 15 °～45 °, described second angle（22）Range of degrees is 45 °～75 °.
2. as claimed in claim 1 a kind of position improved optical touch electronic whiteboard localization method, it is characterized in that, bag
Include：
Step one：Two optical sensor equipment（2）Respectively the line of sensing touch control operation object and optical sensor equipment with vertically
Angle m1, m2 of direction or horizontal direction, and the line of touch control operation object and optical sensor equipment and the angle of display surface
n1、n2；
Step 2：（m1、m2）As reading value to analyze and to judge the position of touch control operation object,（m1、n1）、（m2、n2）Make
For test value to analyze and to judge the credibility of reading value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410273644.8A CN104007883B (en) | 2014-06-19 | 2014-06-19 | Locating-improved optical touch electronic whiteboard and locating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410273644.8A CN104007883B (en) | 2014-06-19 | 2014-06-19 | Locating-improved optical touch electronic whiteboard and locating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104007883A CN104007883A (en) | 2014-08-27 |
| CN104007883B true CN104007883B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410273644.8A Expired - Fee Related CN104007883B (en) | 2014-06-19 | 2014-06-19 | Locating-improved optical touch electronic whiteboard and locating method thereof |
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| JP2005128611A (en) * | 2003-10-21 | 2005-05-19 | Nec Viewtechnology Ltd | Projector, electronic blackboard system using the same and method for acquiring pointed position |
| CN102063231A (en) * | 2011-01-13 | 2011-05-18 | 中科芯集成电路股份有限公司 | Non-contact electronic whiteboard system and detection method based on image detection |
| CN102375622A (en) * | 2011-10-31 | 2012-03-14 | 上海易视计算机科技有限公司 | Virtual electronic whiteboard device |
| CN102915158A (en) * | 2011-08-05 | 2013-02-06 | 富泰华工业（深圳）有限公司 | Air touch device and air touch method |
| CN202815785U (en) * | 2012-08-06 | 2013-03-20 | 杭州华银教育多媒体科技股份有限公司 | Optical touch screen |
| CN103218084A (en) * | 2013-03-22 | 2013-07-24 | 安徽状元郎电子科技有限公司 | Optical electronic white board system |
| CN204009832U (en) * | 2014-06-19 | 2014-12-10 | 安徽春勤教育装备有限公司 | Locate improved optical touch electronic whiteboard |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI553530B (en) * | 2011-12-05 | 2016-10-11 | 緯創資通股份有限公司 | Touch control device, wireless touch control system, and touching control method thereof |
-
2014
- 2014-06-19 CN CN201410273644.8A patent/CN104007883B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005128611A (en) * | 2003-10-21 | 2005-05-19 | Nec Viewtechnology Ltd | Projector, electronic blackboard system using the same and method for acquiring pointed position |
| CN102063231A (en) * | 2011-01-13 | 2011-05-18 | 中科芯集成电路股份有限公司 | Non-contact electronic whiteboard system and detection method based on image detection |
| CN102915158A (en) * | 2011-08-05 | 2013-02-06 | 富泰华工业（深圳）有限公司 | Air touch device and air touch method |
| CN102375622A (en) * | 2011-10-31 | 2012-03-14 | 上海易视计算机科技有限公司 | Virtual electronic whiteboard device |
| CN202815785U (en) * | 2012-08-06 | 2013-03-20 | 杭州华银教育多媒体科技股份有限公司 | Optical touch screen |
| CN103218084A (en) * | 2013-03-22 | 2013-07-24 | 安徽状元郎电子科技有限公司 | Optical electronic white board system |
| CN204009832U (en) * | 2014-06-19 | 2014-12-10 | 安徽春勤教育装备有限公司 | Locate improved optical touch electronic whiteboard |
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| Publication number | Publication date |
|---|---|
| CN104007883A (en) | 2014-08-27 |
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