CN102819356B - Optical touch screen system - Google Patents
Optical touch screen system Download PDFInfo
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- CN102819356B CN102819356B CN201110150374.8A CN201110150374A CN102819356B CN 102819356 B CN102819356 B CN 102819356B CN 201110150374 A CN201110150374 A CN 201110150374A CN 102819356 B CN102819356 B CN 102819356B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 309
- 238000012545 processing Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims description 85
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention relates to electronic equipment, in particular to a touch screen system, namely an optical touch screen system. The optical touch screen system comprises a touch panel, a touch position detection module and a microprocessor system. The touch position detection module comprises a signal processing module and an optical signal receiver which is provided with a photosensitive element. The photosensitive element is connected with the signal processing module. The optical signal receiver comprises at least four filter passages. One end of each filter passage is provided with an optical inlet, and the other end of each filter passage is provided with one photosensitive element. The photosensitive elements receive light in an area which the optical inlet faces so that an effective optical signal area forms in front of the optical inlet. At least four optical signal receiving areas are formed in front of the touch panel at positions which the optical inlets of the filter passages face. The optical touch screen system is simple in structure and low in cost and requires few devices.
Description
Technical field
The present invention relates to electronic equipment, more particularly to a kind of touch-screen system.
Background technology
Growing with multimedia technology, touch-screen system application is more and more extensive, such as telecommunication bureau, bank, city
Information inquiry, Industry Control, the multimedia teaching in street corner etc..Touch-screen system has that sturdy and durable, reaction speed is fast, save empty
Between, be easy to exchange the advantages of.Using this technology, as long as user is lightly touched on display screen with finger or other touch parts
Picture and text can be achieved with operation, so that man-machine interaction is more simple and direct, greatly facilitate user.
Existing touch-screen system mainly adopts Infrared touch screen systems.Infrared touch screen systems are relative to other touch-screens
System, with series of advantages such as stable performance, strong antijamming capability, life-span length, precision height.Almost with overwhelming advantage,
Gradually capture the market of other touch-screen systems.But Infrared touch screen systems still suffer from fatefulue weakness and are difficult to overcome.In addition
Infrared emission pipe is filled on the outside of screen, the compactedness of structure has been had influence on, inconvenience on small-sized screen is adopted, and such as inconvenience is used in
On the screen of mobile phone and palm PC.And Infrared touch screen systems cost is still higher.
The content of the invention
It is an object of the invention to provide a kind of optical touch screen system, to solve above-mentioned technical problem.
Technical problem solved by the invention can employ the following technical solutions to realize：
Optical touch screen system, including a touch pad, the touch location detection module of a detected touch point position, a miniature place
Reason device system, the touch location detection module includes a signal processing module, it is characterised in that the touch location detection mould
Block also includes that an optical signal receives head, and the optical signal receives head and is provided with light-sensitive element, and the light-sensitive element connects the letter
Number processing module；
The optical signal receives head includes at least four light-filtering channels；
Described light-filtering channels one end is provided with a light inlet, and the other end of the light-filtering channels is provided with the light-sensitive element, institute
The conduit wall for stating light-filtering channels is the conduit wall being made up of light screening material；
The light-sensitive element receives the light inlet towards the light in region, so as to light inlet front forms one have
The optical signal receiving area of effect；
The light inlet of four light-filtering channels towards the touch pad position, formed in front of the touch pad to
Few four optical signal receiving areas；And four optical signal receiving areas not exclusively overlap or do not overlap completely；
A luminous point that can be recognized by the touch location detection module is formed on the touch pad（With luminous point to touch
Point）, the optical signal sent at the luminous point is by the light-sensitive element reception of at least one of the touch location detection module
Afterwards, touch signal is produced, and touch signal is passed to into the microprocessor system；The microprocessor system is considered as institute
State the optical signal corresponding to light inlet of the luminous point positioned at the light-filtering channels that the light-sensitive element for receiving the optical signal is located to connect
Receive in region, and optical signal receiving area is associated with the touch pad.
Above-mentioned design can be easy to control without reference to background picture, is particularly well-suited to control the electrical equipment such as television set, air-conditioning.
It is above-mentioned to be designed with light-sensitive element scanning point, make touch location detection module that there are simple structure, with low cost, installation and debugging
It is simple to wait remarkable advantage.
The light-sensitive element can adopt infrared receiving terminal.With the signal for simplifying system and reducing touch location detection module
Treating capacity.
Width inside the light-filtering channels is：The light inlet width at one end be located more than the light-sensitive element
The width of one end, and width is gradually reduced at one end at one end from the light inlet to the light-sensitive element.
Light-filtering channels are arranged in order described at least four, and arrangement mode is adjacent at one end for light-sensitive element institute, described
Light inlet institute is adjacent at one end.Above-mentioned design makes optical signal receiving area towards unanimously.
Light-filtering channels are arranged in order in a row described at least four.Optical signal receives the avris that head is arranged on touch pad, enters
Row scanning point.
Light-filtering channels described at least four are arranged in order at least two rows.Optical signal receives head and is arranged on before touch pad
Side, is scanned luminous point.
The light-filtering channels are flat sector, and the sector is parallel with touch pad place plane；At least four
The light-filtering channels are sequentially arranged in the plane parallel with touch pad place plane, and shape is in a row.
The light-filtering channels can also be hollow tubular, and light-filtering channels described at least four are sequentially arranged in and the touch
In the parallel plane of plate place plane, shape is in a row.
The light inlet of the light-filtering channels is towards the touch pad, corresponding optical signal receiving area correspondence（Mapping）
On the touch pad.
The light-filtering channels are taper, and the light-filtering channels are pyramid.
The light inlet is provided with optical filter.To filter uncorrelated optical signal.
Light inlet described at least four of the optical signal reception head adopts same optical filter.
The passage of the light-filtering channels is kept away and is provided with reflector layer, to strengthen light.To ensure that light-filtering channels are corresponding
Light-sensitive element can receive the optical signal sent at the corresponding optical signal region of light-filtering channels.
The passage of the light-filtering channels is kept away and is provided with dark coating, to absorb light.To avoid light-filtering channels correspondence
Light-sensitive element receive the optical signal sent at the corresponding optical signal region of other light-filtering channels.
The microprocessor system adopts the microprocessor system of television set top box.The optical touch screen system of the present invention
System carries out signal and is connected with television set top box, and shares microprocessor system with television set top box, realizes to television set
Touch operation.
The microprocessor system adopts the microprocessor system of computer.The optical touch screen system and computer of the present invention
Signal connection is carried out, and microprocessor system is shared with computer, realize the touch operation to computer.
The microprocessor system connects a wireless local area network communications module, wirelessly needs to touch with extraneous
Touching the equipment of operation carries out signal connection, realizes touch operation function.
The microprocessor system connects a bluetooth communication, needs with the external world to touch by way of Bluetooth transmission
The bluetooth equipment of operation carries out signal connection, realizes touch operation function.
The microprocessor system connects an infrared communication module, needs with the external world to touch by way of Infrared Transmission
The infrared equipment of operation carries out signal connection, realizes touch operation function.
When exist in the light-filtering channels of same row light-sensitive element described in even number receive at the luminous point reflect light
When, it is considered as the middle part that luminous point is located at the optical signal region that middle two light-sensitive elements are located, the signal processing module is produced
Raw touch signal, and touch signal is passed to into the microprocessor system, the microprocessor system will be positioned at middle
It is associated with the touch pad in the middle part of the optical signal receiving area at two light-sensitive element places.
When exist in the light-filtering channels of same row light-sensitive element described in odd number receive at the luminous point reflect light
When, it is considered as luminous point and is located at the optical signal region that middle light-sensitive element is located, the signal processing module produces touch signal, and
Touch signal is passed to into the microprocessor system, the microprocessor system will be located positioned at middle light-sensitive element
Optical signal region be associated with the touch pad.
In order to further improve touch-screen system precision, same row at least two described in light-filtering channels light inlet in institute
State touch pad front and form at least two optical signal receiving areas, and when there is overlapping region, light-filtering channels described at least two
In light-sensitive element when receiving the optical signal that sends at the luminous point and responding, the microprocessor system is considered as the light
Point is located at the overlapping region of two signal receiving areas.The overlapping region can be two optical signal receiving areas part
Overlap, or three, four or more optical signal receiving areas partly overlap composition.
Head is received including optical signal described at least two, optical signal described at least two receives the optical signal area corresponding to head
There is intersection in domain.
Optical signal described at least two receives the both sides that head is separately positioned on the touch pad.
Optical signal described at least two receives the front that head is separately positioned on the touch pad.
The signal processing module processes an optical signal and receives header, obtains luminous point positioned at an optical signal region；It is described
Another optical signal of signal processing module process receives header, obtains luminous point positioned at another optical signal region, the signal transacting
Module produces touch signal, and touch signal passed to into the microprocessor system, and the microprocessor system is by position
It is associated with the touch pad with the optical signal region of another optical signal region crossover location in an optical signal region, and then determines
Luminous point position on a touchpad.
The photosensitive unit of the optical signal of one luminous point light-filtering channels described at least two of the same row of optical signal reception head
Part is received and identified；Also the light-sensitive element that light-filtering channels described at least one of head are received by another optical signal is received and identified；
Then, the microprocessor system be judged as the luminous point be located at an optical signal receive a same row at least two described in filter
The overlapping region in the optical signal region of passage, the optical signal area of light-filtering channels described at least one of head is received with another optical signal
The overlapping region in domain.
By increasing above-mentioned algorithm, touch precision can be further effectively improved.
Also include that one touches part, touch part and produce light beam, the light beam forms a luminous point on the touch pad.It is described
Touching the light beam of part generation can adopt laser, and by laser luminous point is formed on a touchpad.
The touch part can adopt remote touch pen, and the remote touch pen includes laser instrument, power supply, also with signal
Generation module, power supply connection signal generating module, signal generating module connecting laser, signal generating module produces the electricity of vibration
Signal, and drive laser instrument to send the laser signal of the flicker corresponding with electric signal.Remote touch pen passes through remotely control light
Point, to optical touch screen system corresponding remote operation is realized.Remote touch pen is provided with switch.
Touching part includes a light-emitting component, and the triggering when the touch pad is touched of touch part touches the light-emitting component of part and sends out
Light, forms on a touchpad luminous point.
The touch part can adopt short range felt pen, the short range touch pad to include a shell, power supply, switch and luminous unit
Part, the luminous situation of switch control rule light-emitting component；Switch is connected with the touch end of short range felt pen, touches end and is touching touch pad
When trigger switch, light-emitting component light, luminous point is formed on a touchpad.Short range felt pen lights when contacting with touch pad,
A luminous point is formed on touch pad, luminous point is moved with the movement of short range felt pen, so as to realize short range felt pen pair by luminous point
The touch operation of optical touch screen system.
Also include linear laser device, the linear laser device is arranged on the side of the touch pad, the linear laser device
One layer of laser emitting line parallel with the touch pad is formed in the range of the touch of the touch pad；
When part touch touch pad is touched, laser emitting line is blocked, form luminous point.
The linear laser device adopts a wordline shape laser instrument, a wordline shape laser instrument to be arranged on the optical signal and connect
Receive the offside of head.When touch pad is larger, the wordline shape laser instrument could be arranged to multiple, multiple wordline shape laser instruments
The side of touch pad can be arranged on, it is also possible to be arranged as required to, as long as one layer of the formation of multiple wordline shape laser instruments is swashed
Light emergent ray covers the touch scope of touch pad.
The one wordline shape laser instrument is at least two, and number is identical with the number that the optical signal receives head, described
One wordline shape laser instrument is arranged on the offside that the optical signal receives head, and a wordline shape laser instrument described at least two sends
The flicker frequency of light is different, and the optical signal receives head and receives the laser that a wordline shape laser instrument of offside sends respectively.By one
After the frequency of wordline shape laser instrument is tuned to open, each touch location detection module can receive corresponding wordline shape laser instrument, complete
The scanning of luminous point.
It is at least two that the optical signal receives head, and the wordline shape laser instrument is one, as long as this wordline shape swashs
One layer of laser emitting line that light device is formed covers the touch scope of touch pad.The signal processing module adopts Time share scanning
Mode, timesharing receives optical signal described at least two and receives the receive information sent of hair.Above-mentioned design can reduce linear sharp
The number of light device, and then reduce cost.
Beneficial effect：Due to adopting above-mentioned technical proposal, the present invention is not only simple in structure, with low cost, and can use
Less device, realizes the function that high accuracy is touched.
Description of the drawings
Fig. 1 is a kind of structural representation that optical signal of the present invention receives head；
Fig. 2 is another kind of structural representation that optical signal of the present invention receives head；
Fig. 3 is a kind of structural representation of the present invention；
Fig. 4 is another kind of structural side view of the present invention；
Fig. 5 is another kind of structural representation of the present invention；
Fig. 6 is another kind of structural representation of the present invention；
Fig. 7 is another kind of structural representation of the present invention；
Fig. 8 is another kind of structural representation of the present invention.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, tie below
Conjunction is specifically illustrating and the present invention is expanded on further.
Referring to figs. 1 to Fig. 8, optical touch screen system, including a touch pad 1, the touch location inspection of a detected touch point position
Module, a microprocessor system are surveyed, touch location detection module includes a signal processing module, and touch location detection module is also
Including optical signal reception 2, optical signal reception 2 is provided with light-sensitive element, light-sensitive element connection signal processing module.Light is believed
Number receiving 2 includes at least four light-filtering channels 21.The one end of light-filtering channels 21 is provided with a light inlet, the other end of light-filtering channels 21
Light-sensitive element 22 is provided with, the conduit wall of light-filtering channels 21 is the conduit wall being made up of light screening material.Light-sensitive element 22 is received into light
Mouth is towards the light in region, so that light inlet front forms an effective optical signal receiving area.Four light-filtering channels 21
Light inlet forms at least four optical signal receiving areas towards the position of touch pad 1 in the front of touch pad 1.And four light letters
Number receiving area not exclusively overlaps or does not overlap completely.
A luminous point 3 that can be recognized by the touch location detection module is formed on touch pad 1, with luminous point 3 as touch point.
After the optical signal sent at luminous point 3 is received by least one of touch location detection module light-sensitive element 22, produce and touch letter
Number, and touch signal is passed to into microprocessor system.Light-sensitive element 22 can adopt infrared receiving terminal.With simplify system and
Reduce the signal transacting amount of touch location detection module.
Each light-sensitive element 22 in detection module constantly Time share scanning luminous point 3 can whether there is, and existence position.
It is right positioned at the light inlet institute of the place light-filtering channels 21 of light-sensitive element 22 for receiving optical signal that microprocessor system is considered as luminous point 3
In the optical signal receiving area answered, and optical signal receiving area is associated with touch pad 1.Above-mentioned design can be without reference to background
Picture, it is easy to control, it is particularly well-suited to control the electrical equipment such as television set, air-conditioning.It is above-mentioned to be designed with the scanning point of light-sensitive element 22
3, the remarkable advantage such as make touch location detection module have simple structure, with low cost, installation and debugging simple.
With reference to Fig. 1, Fig. 2, the width inside light-filtering channels 21 is：Light inlet width at one end be more than light-sensitive element 22
Width at one end, and width is gradually reduced at one end at one end from light inlet to light-sensitive element 22.At least four filters
Optical channel 21 is arranged in order, and arrangement mode is adjacent at one end for the institute of light-sensitive element 22, and light inlet institute is adjacent at one end.
With reference to Fig. 1, Fig. 3, at least four light-filtering channels 21 are arranged in order in a row.Realize that optical signal reception 2 is arranged on
The avris of touch pad 1, is scanned luminous point 3.Light-filtering channels 21 are flat sector, and sector is put down with the place plane of touch pad 1
OK；At least four light-filtering channels 21 are sequentially arranged in the plane parallel with the place plane of touch pad 1, and shape is in a row.Filter logical
Road 21 can also be hollow tubular, and at least four light-filtering channels 21 are sequentially arranged in the plane parallel with the place plane of touch pad 1
On, shape is in a row.With reference to Fig. 3, an optical signal reception 2 is provided with an avris of touch pad 1, optical signal receives 2 bag
Include four light-sensitive elements 22, four light-sensitive elements 22 correspondence optical signal region 1a, optical signal region 1b, light letters on touch pad 1
Number region 1c, optical signal region 1d.When the luminous point 3 of part formation is touched at the 1a of optical signal region, light-sensitive element 2a is received
To luminous point 3 reflection light, signal processing module receive light-sensitive element 2a transmission receive information, determine touch signal light believe
In the range of number region 1a.
With reference to Fig. 2, Fig. 4, at least four light-filtering channels 21 are arranged in order at least two rows.Realize that optical signal reception 2 sets
Put in the front of touch pad 1, be scanned luminous point 3.The light inlet of light-filtering channels 21 is towards touch pad 1, corresponding optical signal
Receiving area correspondence（Mapping）On touch pad 1.Light-filtering channels 21 are taper, and light-filtering channels 21 are pyramid.
Light inlet is provided with optical filter.To filter uncorrelated optical signal.At least four of optical signal reception 2 enter light
Mouth adopts same optical filter.The passage of light-filtering channels 21 is kept away and is provided with reflector layer, to strengthen light.To ensure light-filtering channels 21 pairs
The light-sensitive element 22 answered can receive the optical signal sent at the corresponding optical signal region of light-filtering channels 21.The passage of light-filtering channels 21
Keep away and be provided with dark coating, to absorb light.To avoid the corresponding light-sensitive element 22 of light-filtering channels 21 from receiving other light-filtering channels
The optical signal sent at 21 corresponding optical signal regions.
Microprocessor system adopts the microprocessor system of television set top box.The present invention optical touch screen system with
Television set top box carries out signal connection, and shares microprocessor system with television set top box, and realization is touched to television set
Touch operation.Microprocessor system adopts the microprocessor system of computer.The optical touch screen system of the present invention is carried out with computer
Signal connects, and shares microprocessor system with computer, realizes the touch operation to computer.Microprocessor system connection one
Wireless local area network communications module, the equipment of touch operation is wirelessly needed with the external world to carry out signal and is connected, and realizes touching
Touch operating function.Microprocessor system connect a bluetooth communication, by way of Bluetooth transmission with the external world need touch
The bluetooth equipment of operation carries out signal connection, realizes touch operation function.Microprocessor system connects an infrared communication module,
Need the infrared equipment of touch operation to carry out signal with the external world by way of Infrared Transmission to be connected, realize touch operation function.
When there is even number light-sensitive element 22 and receiving the light reflected at luminous point 3, it is considered as luminous point 3 and is located at middle two
The middle part in the optical signal region that light-sensitive element 22 is located, signal processing module produces touch signal, and touch signal is passed to
Microprocessor system, in the optical signal receiving area that microprocessor system will be located positioned at middle two light-sensitive elements 22
Portion is associated with touch pad 1.For example in Fig. 5, luminous point 3 is located at the medium position of optical signal region 1a and optical signal region 1b, light
Quick element 2a and light-sensitive element 2b receive the light of the reflection of luminous point 3, and signal processing module receives respectively light-sensitive element 2a and light
The receive information that quick element 2b sends, according to above-mentioned determination methods, determines optical signal region 1a of the touch signal on touch pad 1
With the middle part of optical signal region 1b.
When there is odd number light-sensitive element 22 and receiving the light reflected at luminous point 3, it is considered as luminous point 3 and is located at middle light
The optical signal region that quick element 22 is located, signal processing module produces touch signal, and touch signal is passed to into miniature process
Device system, microprocessor system is associated with the optical signal region being located positioned at middle light-sensitive element 22 on touch pad 1.Example
As in Fig. 6, although luminous point 3 is located at the 1b of optical signal region, but light-sensitive element 2a, light-sensitive element 2b, light-sensitive element 2c are received
To luminous point 3 reflection light, signal processing module receive respectively light-sensitive element 2a, light-sensitive element 2b, light-sensitive element 2c send
Receive information, according to above-mentioned determination methods, determines the optical signal region 1b models that touch signal is located in middle light-sensitive element 2b
In enclosing.
In order to further improve touch-screen system precision, the light inlet of at least two light-filtering channels 21 of same row is being touched
The front of plate 1 forms at least two optical signal receiving areas, and when there is overlapping region, it is photosensitive at least two light-filtering channels 21
When element 22 receives the optical signal that sends at luminous point 3 and responds.Microprocessor system is considered as luminous point 3 and connects positioned at two signals
Receive the overlapping region in region.Overlapping region can be two optical signal receiving areas partly overlap composition, or three, four
Individual or more optical signal receiving areas partly overlap composition.
With reference to Fig. 7, the present invention can include at least two optical signals reception 2, and it is right that at least two light meet the institute of signal receipts 2
There is intersection in the optical signal region answered.At least two optical signals reception 2 is separately positioned on the both sides of touch pad 1.At least two
Optical signal reception 2 is separately positioned on the front of touch pad 1.Signal processing module processes the information of optical signal reception 2, obtains
An optical signal region is located to luminous point 3, another optical signal of signal processing module process receives the information of head, obtains luminous point 3 and be located at
Another optical signal region, signal processing module（Or microprocessor system）Be considered as luminous point 3 positioned at an optical signal region with it is another
Optical signal region crossover location, signal processing module produces touch signal.And touch signal is passed to into microprocessor system,
Microprocessor system will be associated with tactile positioned at an optical signal region with the optical signal region of another optical signal region crossover location
In template 1, and then determine position of the luminous point 3 on touch pad 1.
For example in Fig. 7, two side Jiao Chu of touch pad 1 are respectively equipped with an optical signal reception 2, and each optical signal connects
Receipts 2 include four light-sensitive elements.Four light-sensitive elements of the optical signal reception 2 in left side form optical signal on touch pad 1
Region 1a, optical signal region 1b, optical signal region 1c, optical signal region 1d.Four photosensitive units of the optical signal reception 2 on right side
Part forms optical signal region 1e, optical signal region 1f, optical signal region 1g, optical signal region 1h on touch pad 1.Signal transacting
Module first processes the receive information that the light-sensitive element in the optical signal reception 2 in left side sends, and obtains luminous point 3 positioned at optical signal area
In the range of the 1b of domain.Then, the reception letter that the light-sensitive element in the optical signal reception 2 on the right side of signal processing module process sends
Breath, obtains luminous point 3 and is located in the range of the 1g of optical signal region.Finally, signal processing module determines that touch signal is located at optical signal area
The overlapping of domain 1b and optical signal region 1g.
The optical signal of one luminous point 3 is by the photosensitive unit of at least two light-filtering channels 21 of the same row of optical signal reception 2
Part 22 is received and identified.Also the light-sensitive element that at least one light-filtering channels of head are received by another optical signal is received and identified.Then,
Microprocessor system is judged as that luminous point 3 is located at the light letter that an optical signal receives at least two light-filtering channels 21 of a 2 same row
The overlapping region in number region, the overlapping region with the optical signal region of at least one light-filtering channels that another optical signal receives head.
When the light-sensitive element of at least two light-filtering channels of another optical signal reception head is received and identified.Position residing for luminous point
Put and be also, another optical signal receives the overlapping region that head can also be the optical signal region of two light-filtering channels.
The formation of luminous point 3 can take various forms, such as touch part and produce light beam, and light beam forms one on touch pad 1
Individual luminous point 3.Touching the light beam of part generation can adopt laser, and luminous point 3 is formed on touch pad 1 by laser.Touching part can be with
Using remote touch pen, remote touch pen includes laser instrument, power supply, and also with signal generating module, power supply connection signal occurs
Module, signal generating module connecting laser, signal generating module produces the electric signal of vibration, and drives laser instrument to send and electricity
The laser signal of the corresponding flicker of signal.Remote touch pen is realized corresponding by remotely control luminous point 3 to optical touch screen system
Remote operation.Remote touch pen is provided with switch.
Touching part includes a light-emitting component, and the triggering when touch pad 1 is touched of touch part touches the light-emitting component of part and lights,
Luminous point 3 is formed on touch pad 1.Touching part can adopt short range felt pen, short range felt pen to include a shell, power supply, switch and send out
Optical element, the luminous situation of switch control rule light-emitting component；Switch is connected with the touch end of short range felt pen, touches end and touches in touch
Trigger switch during template 1, light-emitting component lights, and luminous point 3 is formed on touch pad 1.Short range felt pen with touch pad 1 when contacting
It is luminous, a luminous point 3 is formed on touch pad 1, luminous point 3 is moved with the movement of short range felt pen, realized closely so as to pass through luminous point 3
Touch operation of the journey felt pen to optical touch screen system.
With reference to Fig. 3, Fig. 5, Fig. 6, also including linear laser device 4, linear laser device 4 is arranged on the side of touch pad 1, linear
Laser instrument 4 forms one layer of laser emitting line parallel with touch pad 1 in the range of the touch of touch pad 1.Linear laser device 4 is preferred
One wordline shape laser instrument, when part touch touch pad 1 is touched, blocks laser emitting line, forms luminous point 3.Linear laser device 4 can be with
It is arranged on the offside of optical signal reception 2.When touch pad 1 is larger, linear laser device 4 could be arranged to it is multiple, it is multiple linear
Laser instrument 4 can be arranged on the side of touch pad 1, it is also possible to be arranged as required to, as long as the one of the formation of multiple linear laser devices 4
Layer laser emitting line covers the touch scope of touch pad 1.With reference to Fig. 7, linear laser device 4 is at least two, and number with
The number of optical signal reception 2 is identical, and linear laser device 4 is arranged on the offside of optical signal reception 2, at least two linear lasers
The frequency of device 4 is different, and optical signal receives the laser that a 2 linear laser device 4 for receiving offside respectively sends.By linear laser device 4
Frequency tune to open after, each touch location detection module can receive corresponding linear laser device 4, complete the scanning of luminous point 3.Reference
Fig. 8, optical signal reception 2 is at least two, and linear laser device 4 is one, as long as one layer of laser that linear laser device 4 is formed goes out
Ray covers the touch scope of touch pad 1.By the way of Time share scanning, timesharing receives at least two to signal processing module
Optical signal receives 2 receive information for sending.Above-mentioned design can reduce the number of linear laser device 4, and then reduce cost.Figure
In 8, using three optical signals receptions 2, a linear laser device 4.
Optical signal of the present invention receives the light-sensitive element in 2 and is arranged on more, touches that precision is higher, and optical signal of the present invention connects
Receive 2 and be arranged on more, touch precision also higher.Such as, 1）One optical signal reception 2 is set, is set in optical signal reception 2
Four light-sensitive elements are put, then touch pad front forms four optical signal regions.One optical signal reception 2 is set, and optical signal connects
N light-sensitive element is provided with receipts 2, then touch pad front forms n optical signal region.2）Two optical signals receptions 2 are set,
N light-sensitive element is provided with each optical signal reception 2, then touch pad front forms n × n optical signal region.Arrange four
Optical signal reception 2, in each optical signal reception 2 n light-sensitive element is provided with, then touch pad front forms n4Individual optical signal area
Domain.So, touch pad can recognize n4Individual luminous point, makes the present invention adopt simple structure, realizes high accuracy touch function.
When the touch pad 1 of the present invention is widescreen or during mosaic screen, optical signal receives 2 and could be arranged to multiple, and light believes
Number receiving 2 can be arranged on the side edge of touch pad 1, it is also possible to arrange at the middle part of touch pad 1 or other lateral locations
Optical signal receives 2, and so that each optical signal receives in 2 light-sensitive element at least one luminous point 3 at touch pad can be received.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (61)
1. optical touch screen system, an including touch pad, the touch location detection module of a detected touch point position, a miniature process
Device system, the touch location detection module includes a signal processing module, it is characterised in that the touch location detection module
Also include that an optical signal receives head, the optical signal receives head and is provided with light-sensitive element, and the light-sensitive element connects the signal
Processing module；
Also include linear laser device, the linear laser device is arranged on the side of the touch pad, and the linear laser device is in institute
State one layer of laser emitting line parallel with the touch pad of formation in the range of the touch of touch pad；
When part touch touch pad is touched, laser emitting line is blocked, form luminous point；
The optical signal receives head includes at least four light-filtering channels；
Described light-filtering channels one end is provided with a light inlet, and the other end of the light-filtering channels is provided with the light-sensitive element, the filter
The conduit wall of optical channel is the conduit wall being made up of light screening material；
The light-sensitive element receives the light inlet towards the light in region, so that the formation one of light inlet front is effective
Optical signal receiving area；
The light inlet of four light-filtering channels forms at least four towards the touch pad position in front of the touch pad
Individual optical signal receiving area；And four optical signal receiving areas not exclusively overlap or do not overlap completely.
2. optical touch screen system according to claim 1, it is characterised in that：One is formed on the touch pad can be described
The luminous point of touch location detection module identification, the optical signal sent at the luminous point by the touch location detection module extremely
After a few light-sensitive element is received, touch signal is produced, and touch signal is passed to into the microprocessor system；Institute
State microprocessor system and be considered as the luminous point positioned at the light-filtering channels that the light-sensitive element for receiving the optical signal is located
In optical signal receiving area corresponding to light inlet, and optical signal receiving area is associated with the touch pad.
3. optical touch screen system according to claim 1, it is characterised in that：The light-sensitive element adopts infrared receiving terminal.
4. optical touch screen system according to claim 1, it is characterised in that：Each light-sensitive element timesharing in detection module
Scanning point whether there is, and existence position.
5. optical touch screen system according to claim 1, it is characterised in that：Suitable for controlling television set.
6. optical touch screen system according to claim 1, it is characterised in that：Suitable for controlling air-conditioning.
7. optical touch screen system according to claim 1, it is characterised in that：Width inside the light-filtering channels is：Institute
State light inlet the width of width at one end more than light-sensitive element institute at one end, and width is from light inlet place one
Hold to the light-sensitive element and be gradually reduced at one end.
8. optical touch screen system according to claim 1, it is characterised in that：Light-filtering channels are arranged successively described at least four
Row, arrangement mode is adjacent at one end for light-sensitive element institute, and the light inlet institute is adjacent at one end.
9. optical touch screen system according to claim 1, it is characterised in that：Light-filtering channels are arranged in order described at least four
It is in a row.
10. optical touch screen system according to claim 8, it is characterised in that：Optical signal receives head and is arranged on touch pad
Avris.
11. optical touch screen systems according to claim 7, it is characterised in that：The light-filtering channels are flat sector, institute
State sector parallel with touch pad place plane；Light-filtering channels described at least four are sequentially arranged in and the touch pad institute
In the parallel plane of plane, shape is in a row.
12. optical touch screen systems according to claim 7, it is characterised in that：The light-filtering channels are hollow tubular, at least
Four light-filtering channels are sequentially arranged in the plane parallel with touch pad place plane, and shape is in a row.
13. optical touch screen system according to claim 1, it is characterised in that：One is provided with one avris of touch pad
Optical signal receives head, and optical signal receives head includes four light-sensitive elements, and four light-sensitive elements correspond to respectively on a touchpad difference
Optical signal region；
When the luminous point of part formation is touched at a certain optical signal region, corresponding light-sensitive element receives the light of light point reflection
Line, signal processing module receives the receive information of light-sensitive element transmission, determines touch signal in the corresponding light letter of the light-sensitive element
In number regional extent.
14. optical touch screen systems according to claim 13, it is characterised in that：Optical signal receives head and is arranged on touch pad
Avris.
15. optical touch screen systems according to claim 1, it is characterised in that：Light-filtering channels are arranged successively described at least four
Arrange at least two rows.
16. optical touch screen systems according to claim 1, it is characterised in that：Optical signal receives head and is arranged on touch pad
Front.
17. optical touch screen systems according to claim 16, it is characterised in that：The light inlet of the light-filtering channels is towards institute
Touch pad is stated, corresponding optical signal receiving area correspondence is on the touch pad.
18. optical touch screen systems according to claim 7, it is characterised in that：The light-filtering channels are taper.
19. optical touch screen systems according to claim 7, it is characterised in that：The light-filtering channels are pyramid.
The 20. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Set on the light inlet
There is optical filter.
21. optical touch screen systems according to claim 20, it is characterised in that：The optical signal receives at least four of head
The light inlet adopts same optical filter.
The 22. optical touch screen systems according to any one in claim 1-19, it is characterised in that：The light-filtering channels
The conduit wall is provided with reflector layer.
The 23. optical touch screen systems according to any one in claim 1-19, it is characterised in that：The light-filtering channels
The conduit wall is provided with dark coating.
The 24. optical touch screen systems according to any one in claim 1-19, it is characterised in that：The microprocessor
System adopts the microprocessor system of television set top box.
25. optical touch screen systems according to claim 24, it is characterised in that：Optical touch screen system and television set top box
Signal connection is carried out, and microprocessor system is shared with television set top box, realize the touch operation to television set.
The 26. optical touch screen systems according to any one in claim 1-19, it is characterised in that：The microprocessor
System adopts the microprocessor system of computer.
27. optical touch screen systems according to claim 26, it is characterised in that：The optical touch screen system and computer of the present invention
Signal connection is carried out, and microprocessor system is shared with computer, realize the touch operation to computer.
The 28. optical touch screen systems according to any one in claim 1-19, it is characterised in that：The microprocessor
System connects a wireless local area network communications module.
The 29. optical touch screen systems according to any one in claim 1-19, it is characterised in that：The microprocessor
System connects a bluetooth communication.
The 30. optical touch screen systems according to any one in claim 1-19, it is characterised in that：The microprocessor
System connects an infrared communication module.
The 31. optical touch screen systems according to any one in claim 1-19, it is characterised in that：When the optical filtering of same row
When there is light-sensitive element described in even number in passage and receiving the light reflected at the luminous point, it is considered as luminous point and is located at middle two
The middle part in the optical signal region that the light-sensitive element is located, the signal processing module produces touch signal, and by touch signal
Pass to the microprocessor system, the light that the microprocessor system will be located positioned at middle two light-sensitive elements
It is associated with the middle part of signal receiving area on the touch pad.
The 32. optical touch screen systems according to any one in claim 1-19, it is characterised in that：When the optical filtering of same row
When there is light-sensitive element described in odd number in passage and receiving the light reflected at the luminous point, it is considered as luminous point and is located at middle light
The optical signal region that quick element is located, the signal processing module produces touch signal, and touch signal is passed to described micro-
Type processor system, the microprocessor system is associated with the optical signal region being located positioned at middle light-sensitive element described
On touch pad.
The 33. optical touch screen systems according to any one in claim 1-19, it is characterised in that：At least the two of same row
The light inlet of the individual light-filtering channels forms at least two optical signal receiving areas in front of the touch pad, and there is overlay region
During domain, when the light-sensitive element in light-filtering channels described at least two receives the optical signal that sends at the luminous point and responds, institute
State microprocessor system and be considered as overlapping region of the luminous point positioned at two signal receiving areas.
34. optical touch screen systems according to claim 33, it is characterised in that：The overlapping region is at least two light letter
Number receiving area partly overlaps composition.
The 35. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Including at least two institutes
State optical signal and receive head, optical signal described at least two receives the optical signal region corresponding to head and there is intersection.
36. optical touch screen systems according to claim 35, it is characterised in that：Optical signal described at least two receives head point
It is not arranged on the both sides of the touch pad.
37. optical touch screen systems according to claim 35, it is characterised in that：Optical signal described at least two receives head point
It is not arranged on the front of the touch pad.
38. optical touch screen systems according to claim 35, it is characterised in that：Optical signal described at least two receives head point
It is not arranged on the side edge of the touch pad.
39. optical touch screen systems according to claim 35, it is characterised in that：The signal processing module processes light letter
Number header is received, obtain luminous point positioned at an optical signal region；The signal processing module processes another optical signal and receives head letter
Breath, obtains luminous point positioned at another optical signal region, and the signal processing module produces touch signal, and touch signal is passed to
The microprocessor system, the microprocessor system will intersect position positioned at an optical signal region with another optical signal region
The optical signal region put is associated with the touch pad, and then determines luminous point position on a touchpad.
The 40. optical touch screen systems according to claim 39, it is characterised in that：The optical signal of one luminous point is connect by an optical signal
The light-sensitive element of light-filtering channels is received and identified described at least two of the same row for receiving head；Also head is received by another optical signal
The light-sensitive element of light-filtering channels described at least one is received and identified；Then, the microprocessor system is judged as the luminous point
The overlapping region in the optical signal region of light-filtering channels described at least two of a same row is received positioned at an optical signal, with another light
The overlapping region in the optical signal region of light-filtering channels described at least one of signal reception head.
The 41. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Also touch including one
Part.
42. optical touch screen systems according to claim 41, it is characterised in that：Touch part and produce light beam, the light beam exists
A luminous point is formed on the touch pad.
43. optical touch screen systems according to claim 42, it is characterised in that：The light beam for touching part generation is using sharp
Light, by laser luminous point is formed on a touchpad.
44. optical touch screen systems according to claim 41, it is characterised in that：The touch part adopts remote touch pen,
The remote touch pen includes laser instrument, power supply, and also with signal generating module, power supply connection signal generating module, signal is sent out
Raw module connecting laser, signal generating module produces the electric signal of vibration, and it is corresponding with electric signal to drive laser instrument to send
Flicker laser signal.
45. optical touch screen systems according to claim 44, it is characterised in that：Remote touch pen passes through remotely control light
Point, to optical touch screen system corresponding remote operation is realized.
46. optical touch screen systems according to claim 44, it is characterised in that：Remote touch pen is provided with switch.
47. optical touch screen systems according to claim 41, it is characterised in that：Touching part includes a light-emitting component, touches
Part triggering when the touch pad is touched touches the light-emitting component of part and lights, and luminous point is formed on a touchpad.
48. optical touch screen systems according to claim 41, it is characterised in that：The touch part adopts short range felt pen,
The short range felt pen includes a shell, power supply, switch and light-emitting component, the luminous situation of switch control rule light-emitting component；Switch with
The touch end connection of short range felt pen, touches end trigger switch when touch pad is touched, and light-emitting component lights, on a touchpad shape
Into luminous point.
49. optical touch screen systems according to claim 48, it is characterised in that：Short range felt pen with touch pad when contacting
It is luminous, a luminous point is formed on a touchpad, luminous point is moved with the movement of short range felt pen, so as to realize that short range is touched by luminous point
Touch touch operation of the pen to optical touch screen system.
The 50. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Linear laser device is arranged
The offside of head is received in optical signal.
The 51. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Linear laser device is arranged
For at least two, multiple linear laser devices are arranged on the side of touch pad.
The 52. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Linear laser device is arranged
For at least two, one layer of laser emitting line that multiple linear laser devices are formed covers the touch scope of touch pad.
The 53. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Linear laser device number
It is identical with the number that optical signal receives head.
54. optical touch screen systems according to claim 53, it is characterised in that：Linear laser device is arranged on optical signal reception
The offside of head.
55. optical touch screen systems according to claim 54, it is characterised in that：The frequency of at least two linear laser devices is not
Together, optical signal receives head and receives the laser that the linear laser device of offside sends respectively.
56. optical touch screen systems according to claim 55, it is characterised in that：After the frequency of linear laser device is tuned to open,
Each touch location detection module can receive corresponding linear laser device, complete the scanning of luminous point.
The 57. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Optical signal receives head
At least two, linear laser device is one, as long as one layer of laser emitting line that linear laser device is formed covers the touch of touch pad
Scope.
The 58. optical touch screen systems according to any one in claim 1-19, it is characterised in that：Signal processing module is adopted
The receive information sent with the mode of Time share scanning, timesharing reception at least two optical signals reception hair.
59. optical touch screen systems according to claim 57, it is characterised in that：Three optical signals receive head, correspondence one
Linear laser device.
The 60. optical touch screen systems according to any one in claim 1-19, it is characterised in that：When touch pad is widescreen
Or during mosaic screen, optical signal receives head and is provided with multiple, and optical signal receives head and is arranged on touch pad side edge.
The 61. optical touch screen systems according to any one in claim 1-19, it is characterised in that：When touch pad is widescreen
Or during mosaic screen, optical signal receives head and is provided with multiple, and optical signal receives the middle part that head is arranged on touch pad.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610598910.3A CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
| CN201110150374.8A CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
| CN201610598941.9A CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
| CN201710191452.6A CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110150374.8A CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610598910.3A Division CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
| CN201710191452.6A Division CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
| CN201610598941.9A Division CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102819356A CN102819356A (en) | 2012-12-12 |
| CN102819356B true CN102819356B (en) | 2017-05-10 |
Family
ID=47303492
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710191452.6A Expired - Fee Related CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
| CN201110150374.8A Expired - Fee Related CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
| CN201610598941.9A Expired - Fee Related CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
| CN201610598910.3A Expired - Fee Related CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710191452.6A Expired - Fee Related CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610598941.9A Expired - Fee Related CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
| CN201610598910.3A Expired - Fee Related CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
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| CN (4) | CN107145264B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9367177B2 (en) * | 2013-06-27 | 2016-06-14 | Hong Kong Applied Science and Technology Research Institute Company Limited | Method and system for determining true touch points on input touch panel using sensing modules |
| CN105514766A (en) * | 2016-02-29 | 2016-04-20 | 北京仁光科技有限公司 | Large-angle uniform line laser sector modulation device |
| CN107283442B (en) * | 2017-08-07 | 2023-08-15 | 深圳欧沃机器人有限公司 | Control device and robot system |
| CN113075138A (en) * | 2020-01-03 | 2021-07-06 | 北京小米移动软件有限公司 | State identification method and device of target characteristics and electronic equipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4455391B2 (en) * | 2005-04-15 | 2010-04-21 | キヤノン株式会社 | Coordinate input device, control method therefor, and program |
| CN101971128B (en) * | 2007-12-05 | 2013-07-17 | 阿尔梅瓦股份公司 | Interaction arrangement for interaction between a display screen and a pointer object |
| CN101344827A (en) * | 2008-08-22 | 2009-01-14 | 李兴文 | Optical touch screen and touch pen |
| CN201465072U (en) * | 2009-04-04 | 2010-05-12 | 李兴文 | Virtual touch screen |
| CN101872271B (en) * | 2009-04-27 | 2013-04-24 | 鸿富锦精密工业（深圳）有限公司 | Touch control system |
| CN102043575B (en) * | 2009-10-23 | 2012-12-19 | 鸿富锦精密工业（深圳）有限公司 | Touch electronic device with optimization configuration function and optimization configuration method of touch electronic device |
| CN102004586B (en) * | 2010-11-23 | 2013-01-09 | 广东威创视讯科技股份有限公司 | Touch point positioning device and method |
-
2011
- 2011-06-07 CN CN201710191452.6A patent/CN107145264B/en not_active Expired - Fee Related
- 2011-06-07 CN CN201110150374.8A patent/CN102819356B/en not_active Expired - Fee Related
- 2011-06-07 CN CN201610598941.9A patent/CN106227391B/en not_active Expired - Fee Related
- 2011-06-07 CN CN201610598910.3A patent/CN106249967B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN106249967B (en) | 2019-04-30 |
| CN107145264B (en) | 2020-05-15 |
| CN106249967A (en) | 2016-12-21 |
| CN107145264A (en) | 2017-09-08 |
| CN106227391A (en) | 2016-12-14 |
| CN106227391B (en) | 2019-09-17 |
| CN102819356A (en) | 2012-12-12 |
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