CN101620485B - Device and method for positioning light source - Google Patents
Device and method for positioning light source Download PDFInfo
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- CN101620485B CN101620485B CN200910041192XA CN200910041192A CN101620485B CN 101620485 B CN101620485 B CN 101620485B CN 200910041192X A CN200910041192X A CN 200910041192XA CN 200910041192 A CN200910041192 A CN 200910041192A CN 101620485 B CN101620485 B CN 101620485B
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Abstract
The invention relates to a device and a method for positioning a light source. The structure of the device for positioning the light source comprises a light emission module, a light receiving module and a data processing module, wherein, the light emission module is used for emitting scattering light; the light receiving module is electrically connected with the data processing module and comprises light receiving tubes arranged on a screen side frame and used for receiving the scattering light emitted by the light emission module and a light shielding piece which is used for enabling each n light receiving tubes to have an overlapping effective receiving area in the receiving area of a certain space at the front of the screen side frame by adjusting the light receiving angle of the light receiving tubes, the overlapping effective receiving areas of all the light receiving tubes are evenly distributed in a certain space at the front of a screen, and the light shielding piece covers an integrated area face at the front of the screen side frame; and the data processing module is used for calculating a space position of the light emission module according to the number of the light receiving tubes receiving the scattering light of the light emission module and the position of each light receiving tubes receiving the scattering light of the light emission module on the side frame. The invention can directly position the light source and enhance the positioning accuracy.
Description
Technical field
The present invention relates to the light source location technology, particularly a kind of light source locating device and method, this light source generally is infrared light, monochromatic light or laser or the like.
Background technology
Along with the infrared touch technology or use the develop rapidly of the touching technique of other light source, the location technology of infrared light or other light source has obtained using widely, has adopted the location technology of infrared light or other light source in touch system especially giant-screen touch system in a large number.
Adopted the touch system of infrared light or other light source location technology, its structure generally comprises camera, optics lettering pen, be used for the optics lettering pen the light wave imaging write screen, projection module and data processing module or the like.
The optics lettering pen can be a light pen, send infrared light, monochromatic light or laser or the like, at this moment, camera generally has and the homochromy monochromatic filter of this optics lettering pen, by delivering to data processing module behind the camera photographed screen image, data processing module analyzes the position coordinates of concrete picture point on screen, is shown on screen by projection module again.
The optics lettering pen also can be non-light source objects or passive pen, such as finger, the reasonable white simulation of reflecting effect pen etc., the optics lettering pen relies on reflecting light to form picture point, the periphery of screen is provided with monochromatic source, the light that monochromatic source is sent can cover the viewing area of whole screen, camera generally has and the homochromy optical filter of this monochromatic source, if light-source brightness is enough, does not just need optical filter.
The above-mentioned touch system that has adopted infrared light or other light source location technology, no matter the optics lettering pen is a light pen also is non-light source objects or passive pen, its localization method all may be summarized to be: the picture point that camera is caught, be to be positioned at the speck that infrared light, monochromatic light or the laser etc. of the optics lettering pen emission of screen near zone or reflection form on screen, this picture point is to be caught by camera with the form of the part on the screen, and the screen picture that has a screen map picture point by the data processing module analysis is realized the picture point location again.The locating device of corresponding above-mentioned localization method comprises optics lettering pen, screen, camera and data processing module on the structure, when the optics lettering pen adopts non-light source objects or passive, also comprise monochromatic source, also need be provided with optical filter in case of necessity.Above-mentioned locating device is because camera catches is whole screen picture, and data processing module realizes that the picture point location is to obtain picture point by analyzing whole screen picture, the workload of data processing module is big, and the algorithm complexity has reduced the accuracy of the picture point coordinate position that analyzes.Moreover, when the optics lettering pen adopts light pen, be positioned at before the screen far away when regional, the speck area that it forms on screen usually can be bigger, this has also increased the workload of data processing module, has also reduced the accuracy of the picture point coordinate position that analyzes, and adopts the single light source of laser isotropy can form less speck, but the performance accuracy to the user requires height, influences practical application; When the optics lettering pen adopts non-light source objects or passive; picture point on the screen comes down to the optics lettering pen and is reflected in reflection speck on the screen; the speck area usually can be bigger; also increased the workload of data processing module; reduced the accuracy of the picture point coordinate position that analyzes; and the light strength ratio that needs monochromatic source to send is bigger.
In addition, because before touch system generally is fixed on the display surface of LCD or other display equipment, as infrared touch, capacitance touch, and all there is following problem in resistive touch etc.: the heat radiation of near zone and electromagnetic radiation are very big before screen, the human body of near zone causes bigger injury before the screen to being positioned in long-term use meeting, limited the application extension of location technology, simultaneously because human body is positioned at the preceding near zone of screen, visual angle with respect to screen is smaller, and near zone carries out touch operation and brought some restrictions before screen.And when using the multipoint location system of infrared location or other light sources location, because the pairing speck on screen of picture point all has a certain size area, data processing module need adopt mean value calculation to determine the pairing image point locations of each speck, when there is the overlapping region in the speck that is formed by a plurality of photoelectricity lettering pens, problem such as can't solve with regard to the repetition dead point of a plurality of points of easy appearance on screen.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of light source locating device is provided, light source locating device of the present invention has improved positional accuracy by light source is directly positioned.
Another object of the present invention is to provide above-mentioned light source locating device to realize the method for light source location.
A further object of the present invention is to provide a kind of touch system that adopts above-mentioned light source locating device.
The 4th purpose of the present invention is to provide the implementation method of above-mentioned touch system.
Purpose of the present invention is achieved through the following technical solutions: the light source locating device comprises:
Light emission module is used to send scattered light;
The Optical Receivers that is electrically connected with data processing module, comprise and be arranged on the light receiving tube that is used to receive the scattered light that light emission module sends on the screen frame, and the light-receiving angle that is used to adjust light receiving tube, make every n light receiving tube have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space, and overlapping effective receiving area of all light receiving tubes is evenly distributed on screen the place ahead certain space, and the anti-dazzling screen of a complete area face in cover screen frame the place ahead;
Data processing module, analyze and light receiving tube number that statistics receives the light emission module scattered light with and position on frame, the position of each light receiving tube on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of light receiving tube, calculate the locus of light emission module.
Described data processing module comprises: be used to store the light-receiving angle and the position of each light receiving tube on the screen frame of each light receiving tube, and the storage module of storing the locus of every n the pairing overlapping effective receiving area of light receiving tube.
Described data processing module makes every n light receiving tube have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space, is preferably: make per 3 light receiving tubes have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space.
Preferably, described overlapping effective receiving area is tending towards a little.
The scattered light that described light emission module sends is identical with the light-receiving frequency of light receiving tube, specifically: described light emission module is infrared light power valve, monochromatic light power valve or LASER Discharge Tube or the like, and described light receiving tube corresponds to infrared light receiving tube, monochromatic light receiving tube or laser pick-off pipe or the like.
Preferably, the distance of described light emission module and screen frame remains between 0.5～10 meter, is positioned at this range distance, is more suitable for practical application, also helps light receiving tube and receives the scattered light that light emission module sends.
The scattered light signal that described light emission module sends is fixing coded system, is used to avoid light receiving tube to receive the scattered light signal that light emission module sends, by the interference of other light signals of the same type or other light signal.
When adopting a plurality of light emission module, each light emission module adopts different regular coding modes, can realize multipoint positioning very easily.
Above-mentioned light source locating device is realized the method for light source location, at first, data processing module is according to the position of each light receiving tube on the screen frame of being stored, calculate the distance on the screen frame between each light receiving tube, then according to the light-receiving angle of the distance between the light receiving tube with each light receiving tube of being stored, calculate the locus of every n the pairing overlapping effective receiving area of light receiving tube and store, this light source localization method step is as follows:
A. light emission module sends scattered light to the screen frame in the certain space of screen frame the place ahead;
B. all light receiving tubes to separately effectively the receiving area carry out light signal and receive;
C. data processing module analysis and the statistics light receiving tube number that receives the light emission module scattered light with and position on frame, the position of each light receiving tube on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of light receiving tube, calculate the locus of light emission module.
Adopt the touch system of the above-mentioned light source locating device of the present invention, comprising:
The light source locating device;
Control module is used to receive the locus of the light emission module that the data processing module of light source locating device transmits, and this locus is converted to the required coordinate position in plane and sends to projection module;
Projection module is used to receive the coordinate position that control module transmits, and shows on screen.
Adopt the implementation method of the touch system of the above-mentioned light source locating device of the present invention, at first, data processing module is according to the position of each light receiving tube on the screen frame of being stored, calculate the distance on the screen frame between each light receiving tube, then according to the light-receiving angle of the distance between the light receiving tube with each light receiving tube of being stored, calculate the locus of every n the pairing overlapping effective receiving area of light receiving tube and store, this method step is as follows:
A. light emission module sends scattered light to the screen frame in the certain space of screen frame the place ahead;
B. all light receiving tubes to separately effectively the receiving area carry out light signal and receive;
C. data processing module analysis and the statistics light receiving tube number that receives the light emission module scattered light with and position on frame, the position of each light receiving tube on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of light receiving tube, calculate the locus of light emission module;
D. control module receives the locus of the light emission module that the data processing module of light source locating device transmits, and this locus is converted to the required coordinate position in plane and sends to projection module;
F. projection module is used to receive the coordinate position that control module transmits, and shows on screen.
In the said method, the described control module of steps d is converted to the required coordinate position in plane with the locus, preferably adopts the spatial point projecting method, or coordinate method one to one on the employing program, or becomes the dot information disposal route on plane etc. with matrix conversion.
Compared with prior art, the present invention has following beneficial effect:
One, by adopting light receiving tube directly to receive the scattered light signal of light emission module,, realized the location that degree of accuracy is high, be easy to drop into actual use in conjunction with the light receiving tube positional information of pre-stored and the spatial positional information of overlapping effective receiving area;
Two, by the employing control of being in the light, reduced the extensive work of adjusting light receiving tube, simplify production debugging work;
Three, can be by the variation that the scattered light signal of light emission module is encoded, the realization multiple spot is accurately located;
Four, adopt the touch system of light source locating device of the present invention, can pass through anti-dazzling screen, effective receiving area of Optical Receivers is arranged on front space away from screen, and human body can be away from screen, thereby reaches the influence that the heat radiation that reduces screen and electromagnetic radiation cause human body.
Description of drawings
Fig. 1 is the structural representation of present embodiment infrared positioning apparatus;
Fig. 2 is the distribution situation of screen frame of present embodiment and the infrared light receiving tube situation map of arranging;
Fig. 3 is the effective receiving area of a present embodiment infrared light receiving tube analysis chart;
Fig. 4 is the effective receiving area of present embodiment decision analysis figure.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Generally speaking, light source locating device of the present invention comprises:
Light emission module is used to send scattered light;
The Optical Receivers that is electrically connected with data processing module, comprise and be arranged on the light receiving tube that is used to receive the scattered light that light emission module sends on the screen frame, and the light-receiving angle that is used to adjust light receiving tube, make every n light receiving tube have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space, and overlapping effective receiving area of all light receiving tubes is evenly distributed on screen the place ahead certain space, and the anti-dazzling screen of a complete area face in cover screen frame the place ahead;
Data processing module is used for calculating the locus of light emission module according to light receiving tube number that receives the light emission module scattered light and the position of each light receiving tube on frame that receives the light emission module scattered light.
Described data processing module comprises: be used to store the light-receiving angle and the position of each light receiving tube on the screen frame of each light receiving tube, and the storage module of storing the locus of every n the pairing overlapping effective receiving area of light receiving tube.
Described data processing module makes every n light receiving tube have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space, is preferably: make per 3 light receiving tubes have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space.
Preferably, described overlapping effective receiving area is tending towards a little.
The scattered light that described light emission module sends is identical with the light-receiving frequency of light receiving tube, specifically: described light emission module is infrared light power valve, monochromatic light power valve or LASER Discharge Tube or the like, and described light receiving tube corresponds to infrared light receiving tube, monochromatic light receiving tube or laser pick-off pipe or the like.
Be the infrared light power valve with described light emission module below, described light receiving tube is that example is done detailed description to the present invention for the infrared light receiving tube.
Embodiment one
The light source locating device as shown in Figure 1, comprising:
The infrared light power valve is used to send scattered light;
The infrared light receiver module that is electrically connected with data processing module comprises being arranged on the infrared light receiving tube that is used to receive the scattered light that light emission module sends on the screen frame, and anti-dazzling screen;
Data processing module is used for calculating the locus of infrared light power valve according to the infrared light receiving tube number that receives infrared light power valve scattered light and each infrared light receiving tube position on frame that receives infrared light power valve scattered light.
Described data processing module comprises: be used to store light-receiving angle and each infrared light receiving tube position on the screen frame of each infrared light receiving tube, and the storage module of storing the locus of every n the pairing overlapping effective receiving area of infrared light receiving tube.
All infrared light receiving tubes all are arranged on the screen frame, on-screen display (osd) area by frame institute around, as shown in Figure 2.
Described anti-dazzling screen is used to adjust the light-receiving angle of infrared light receiving tube, make every n infrared light receiving tube have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space, and overlapping effective receiving area of all infrared light receiving tubes is evenly distributed on screen the place ahead certain space, an and complete area face in cover screen frame the place ahead, as shown in Figure 4, anti-dazzling screen has covered the receiving area of infrared light receiving tube toward the anti-dazzling screen direction.
Shown in Fig. 3 and 4: the angular setting by anti-dazzling screen on the screen frame evenly distributes effective receiving area of each infrared light receiving tube.By be in the light and angular setting make infrared light receiving tube A, effective receiving area that B, C can receive infrared light is respectively prismatic B a1 b1 c1 d1, A a2 b2 c2 d2 and C a3 b3 c3d3.
The deployment scenarios of infrared light receiving tube is got three infrared light receiving tubes by geometrical calculation from the infrared light receiving tube that can receive light signal arbitrarily, the area maximum that its line is formed.
According to optical principle, because the line area maximum of three infrared light receiving tubes on original plane, its projection is to project on the parallel plane with infrared light receiving tube plane according to certain proportion directional, so project the plane-parallel geometrical body at infrared light power valve place at all infrared light receiving tubes basic identical, its area that corresponds on the plane of infrared light power valve is close, as shown in Figure 3.The area that the central point line of three the effective receiving areas of infrared light receiving tube on plane in parallel is formed is big more, and its area that intersects is just more little.When area was enough big, the crossing area that just can form them also was that overlapping effective receiving area just is tending towards a point.As in the EFGH of plane, a1 b1 c1 d1, a2 b2 c2 d2 and a3 b3 c3 d3, these three polygons and fan-shaped cross-connecting area also are that the area district of overlapping effective receiving area is a3ba, if three points of infrared light receiving tube ABC receive the signal of infrared light power valve simultaneously.If the infrared light power valve is on the EFGH plane so, it fixes in the a3ba district with regard to one; When the area between 3 of the ABC was big more, the a3ba district was just more little, and when area was enough big, overlapping effective receiving area that just can form them was just more little and be tending towards a point.
The light signal that described infrared light power valve sends is fixing coded system, is used to avoid the infrared light receiving tube to receive the light signal that the infrared light power valve sends, by the interference of other light signals of the same type or other light signal.
When adopting a plurality of infrared light power valve, each infrared light power valve adopts different regular coding modes, can realize multipoint positioning very easily.
Preferably, the distance of described infrared light power valve and screen frame remains between 0.5～10 meter, is positioned at this range distance, is more suitable for practical application, also helps the infrared light receiving tube and receives the scattered light that the infrared light power valve sends.
Above-mentioned light source locating device is realized the method for light source location, at first, data processing module is according to each position of infrared light receiving tube on the screen frame of being stored, calculate the distance on the screen frame between each infrared light receiving tube, then according to the light-receiving angle of the distance between the infrared light receiving tube with each infrared light receiving tube of being stored, calculate the locus of every n the pairing overlapping effective receiving area of infrared light receiving tube and store, light source localization method step is as follows:
A. the infrared light power valve sends ir scattering light to the screen frame in the certain space of screen frame the place ahead;
B. all infrared light receiving tubes to separately effectively the receiving area carry out infrared signal and receive;
C. data processing module analysis and the statistics infrared light receiving tube number that receives infrared light with and position on the screen frame, each infrared light receiving tube position on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of infrared light receiving tube, calculate the locus of infrared light power valve.
Adopt the touch system of above-mentioned light source locating device, comprising:
The light source locating device;
Control module is used to receive the locus of the infrared light power valve that the data processing module of light source locating device transmits, and this locus is converted to the required coordinate position in plane and sends to projection module;
Projection module is used to receive the coordinate position that control module transmits, and shows on screen.
The implementation method of above-mentioned touch system, at first, data processing module is according to each position of infrared light receiving tube on the screen frame of being stored, calculate the distance on the screen frame between each infrared light receiving tube, then according to the light-receiving angle of the distance between the infrared light receiving tube with each infrared light receiving tube of being stored, calculate the locus of every n the pairing overlapping effective receiving area of infrared light receiving tube and store, this method step is as follows:
A. the infrared light power valve sends ir scattering light to frame in the certain space of screen frame the place ahead;
B. all infrared light receiving tubes carry out infrared signal to receiving area separately and receive;
C. data processing module analysis and the statistics infrared light receiving tube number that receives infrared light with and position on frame, each infrared light receiving tube position on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of infrared light receiving tube, calculate the locus of infrared light power valve;
D. control module receives the locus of the infrared light power valve that data processing module transmits, and this locus is converted to the required coordinate position in plane and sends to projection module;
F. projection module is used to receive the coordinate position that control module transmits, and shows on screen.
In the said method, the described control module of steps d is converted to the required coordinate position in plane with the locus, preferably adopts the spatial point projecting method, or coordinate method one to one on the employing program, or becomes the dot information disposal route on plane etc. with matrix conversion.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. light source locating device is characterized in that: comprising:
Light emission module is used to send scattered light;
The Optical Receivers that is electrically connected with data processing module comprises being arranged on the light receiving tube that is used to receive the scattered light that light emission module sends on the screen frame; Be used to adjust the light-receiving angle of light receiving tube, make every n light receiving tube have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space, and overlapping effective receiving area of all light receiving tubes is evenly distributed on screen the place ahead certain space, and the anti-dazzling screen of a complete area face in cover screen frame the place ahead;
Data processing module, be used to analyze and add up the light receiving tube number that receives the light emission module scattered light with and position on frame, the position of each light receiving tube on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of light receiving tube, calculate the locus of light emission module;
Described data processing module comprises: be used to store the light-receiving angle and the position of each light receiving tube on the screen frame of each light receiving tube, and the storage module of storing the locus of every n the pairing overlapping effective receiving area of light receiving tube.
2. light source locating device according to claim 1, it is characterized in that: described data processing module makes every n light receiving tube have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space, specifically: make per 3 light receiving tubes have an overlapping effective receiving area in effective receiving area of screen frame the place ahead certain space.
3. light source locating device according to claim 1 is characterized in that: described overlapping effective receiving area is tending towards a little.
4. light source locating device according to claim 1 is characterized in that: the scattered light that described light emission module sends is identical with the light-receiving frequency of light receiving tube.
5. light source locating device according to claim 1 is characterized in that: the scattered light signal that described light emission module sends is fixing coded system, and when adopting a plurality of light emission module, each light emission module adopts different regular coding modes.
6. realize the method for light source location according to each described light source locating device of claim 1 to 5, it is characterized in that: at first, data processing module is according to the position of each light receiving tube on the screen frame of being stored, calculate the distance on the screen frame between each light receiving tube, then according to the light-receiving angle of the distance between the light receiving tube with each light receiving tube of being stored, calculate the locus of every n the pairing overlapping effective receiving area of light receiving tube and store, this light source localization method step is as follows:
A. light emission module sends scattered light to the screen frame in the certain space of screen frame the place ahead;
B. all light receiving tubes to separately effectively the receiving area carry out light signal and receive;
C. data processing module analysis and the statistics light receiving tube number that receives the light emission module scattered light with and position on frame, the position of each light receiving tube on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of light receiving tube, calculate the locus of light emission module.
7. the touch system of forming according to each described light source locating device of claim 1 to 5 is characterized in that, comprising:
The light source locating device;
Control module is used to receive the locus of the light emission module that the data processing module of light source locating device transmits, and this locus is converted to the required coordinate position in plane and sends to projection module;
Projection module is used to receive the coordinate position that control module transmits, and shows on screen.
8. the implementation method of the touch system that light source locating device according to claim 7 is formed, it is characterized in that, at first, data processing module is according to the position of each light receiving tube on the screen frame of being stored, calculate the distance on the screen frame between each light receiving tube, then according to the light-receiving angle of the distance between the light receiving tube with each light receiving tube of being stored, calculate the locus of every n the pairing overlapping effective receiving area of light receiving tube and store, this method step is as follows:
A. light emission module sends scattered light to the screen frame in the certain space of screen frame the place ahead;
B. all light receiving tubes to separately effectively the receiving area carry out light signal and receive;
C. data processing module analysis and the statistics light receiving tube number that receives the light emission module scattered light with and position on frame, the position of each light receiving tube on the screen frame of binding data processing module storage, and the locus of every n the pairing overlapping effective receiving area of light receiving tube, calculate the locus of light emission module;
D. control module receives the locus of the light emission module that the data processing module of light source locating device transmits, and this locus is converted to the required coordinate position in plane and sends to projection module;
F. projection module is used to receive the coordinate position that control module transmits, and shows on screen.
9. the implementation method of the touch system that light source locating device according to claim 8 is formed, it is characterized in that: the described control module of steps d is converted to the required coordinate position in plane with the locus, be to adopt the spatial point projecting method, or coordinate method one to one on the employing program, or become the dot information disposal route on plane with matrix conversion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910041192XA CN101620485B (en) | 2009-07-16 | 2009-07-16 | Device and method for positioning light source |
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| CN200910041192XA CN101620485B (en) | 2009-07-16 | 2009-07-16 | Device and method for positioning light source |
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| CN101620485B true CN101620485B (en) | 2011-07-27 |
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| CN200910041192XA Expired - Fee Related CN101620485B (en) | 2009-07-16 | 2009-07-16 | Device and method for positioning light source |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012078986A (en) * | 2010-09-30 | 2012-04-19 | Hitachi Constr Mach Co Ltd | Optical touch panel device of construction machinery |
| CN102819355B (en) * | 2011-06-07 | 2017-05-31 | 上海科斗电子科技有限公司 | Touch pad front sets the touch-screen system that optical signal receives head |
| JP6214783B2 (en) * | 2014-02-26 | 2017-10-18 | フィリップス ライティング ホールディング ビー ヴィ | Estimating the position of the light source of a lighting fixture from the light reach |
| CN107506055B (en) * | 2017-08-25 | 2020-05-22 | 遵义博文软件开发有限公司 | Slide show control device |
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: Wei Chong group Limited by Share Ltd Address before: 510663 Guangzhou province high tech Industrial Development Zone, Guangdong, Cai road, No. 6, No. Patentee before: Guangdong Weichuangshixun Science and Technology Co., Ltd. |
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