CN102819356A - Optical touch screen - Google Patents
Optical touch screen Download PDFInfo
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- CN102819356A CN102819356A CN2011101503748A CN201110150374A CN102819356A CN 102819356 A CN102819356 A CN 102819356A CN 2011101503748 A CN2011101503748 A CN 2011101503748A CN 201110150374 A CN201110150374 A CN 201110150374A CN 102819356 A CN102819356 A CN 102819356A
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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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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention relates to electronic equipment, in particular to a touch screen, namely an optical touch screen. The optical touch screen 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 is simple in structure and low in cost and requires few devices.
Description
Technical field
The present invention relates to electronic equipment, relate in particular to a kind of touch-screen.
Background technology
Growing along with multimedia technology, touch-screen applications more and more widely, like the information inquiry in telecommunication bureau, bank, street corner, city, Industry Control, multimedia teaching etc.That touch-screen has is sturdy and durable, reaction velocity fast, save the space, be easy to advantage such as interchange.Utilize this technology, the user needs only the picture and text that bump lightly on the display screen with finger or other touch parts and just can realize operating, thereby makes man-machine interaction more simple and direct, greatly facilitates the user.
Existing touch-screen mainly adopts infrared touch panel.Infrared touch panel is with respect to other touch-screens, has stable performance, series of advantages such as antijamming capability is strong, the life-span is long, precision height.Almost, capture the market of other touch-screens gradually with overwhelming advantage.But infrared touch panel still exists fatefulue weakness to be difficult to overcome.Will adorn infrared correlation pipe in the screen outside in addition, have influence on the compactedness of structure, inconvenience is adopted on the small-sized screen, is used in like inconvenience on the screen of mobile phone and palm PC.And the infrared touch panel cost is still higher.
Summary of the invention
The object of the present invention is to provide a kind of optical touch screen, to solve the problems of the technologies described above.
The technical matters that the present invention solved can adopt following technical scheme to realize:
Optical touch screen; The touch location detection module, the microprocessor system that comprise a touch pad, a detected touch point position; Said touch location detection module comprises a signal processing module, it is characterized in that, said touch location detection module comprises that also a light signal receives head; Said light signal receives head and is provided with light activated element, and said light activated element connects said signal processing module;
Said light signal receives head and comprises at least four optical filtering passages;
Said optical filtering passage one end is provided with a light inlet, and the other end of said optical filtering passage is provided with said light activated element, the conduit wall of the conduit wall of said optical filtering passage for being made up of light screening material;
Said light activated element receives the light of said light inlet in the zone, so that said light inlet the place ahead forms an effective light signal receiving area;
The light inlet of four said optical filtering passages forms at least four light signal receiving areas towards said touch pad position in said touch pad the place ahead; And four light signal receiving areas are not exclusively overlapping or not overlapping fully;
On said touch pad, forming one can be by the luminous point (is the touch point with the luminous point) of said touch location detection module identification; After the light signal that said luminous point place sends is received by at least one the said light activated element in the said touch location detection module; Produce touch signal, and touch signal is passed to said microprocessor system; Said microprocessor system is regarded as said luminous point and is positioned at the pairing light signal of the light inlet receiving area that the light activated element that receives said light signal belongs to said optical filtering passage, and the light signal receiving area is associated with on the said touch pad.
Above-mentioned design can be with reference to the background picture, and control is convenient, is specially adapted to control electrical equipment such as televisor, air-conditioning.The light activated element scanning spot is adopted in above-mentioned design, makes the touch location detection module have remarkable advantages such as simple in structure, with low cost, that Installation and Debugging are simple.
Said light activated element can adopt infrared receiving terminal.With simplified system and the signal Processing amount that reduces the touch location detection module.
The width of said optical filtering channel interior is: said light inlet width at one end greater than said light activated element width at one end, and width at one end at one end reduces to said light activated element from said light inlet gradually.
At least four said optical filtering passages are arranged in order, and arrangement mode is that said light activated element institute is at one end adjacent, and said light inlet institute is at one end adjacent.Above-mentioned design makes the light signal receiving area towards unanimity.
At least four said optical filtering passages are arranged in order into a row.Light signal receives the avris that head is arranged on touch pad, carries out scanning spot.
At least four said optical filtering passages are arranged in order at least two rows.Light signal receives the place ahead that head is arranged on touch pad, carries out scanning spot.
Said optical filtering passage is flat fan-shaped, said sector and said touch pad place plane parallel; At least four said optical filtering passages are sequentially arranged in said touch pad and belong on the parallel plane plane, form a row.
Said optical filtering passage also can be hollow tubular, and at least four said optical filtering passages are sequentially arranged in said touch pad and belong on the parallel plane plane, forms a row.
The light inlet of said optical filtering passage is towards said touch pad, and pairing light signal receiving area corresponding (mapping) is on said touch pad.
Said optical filtering passage is taper, and said optical filtering passage is a pyramid.
Said light inlet is provided with optical filter.So that the uncorrelated light signal of filtering.
At least four said light inlets that said light signal receives head adopt same optical filter.
The said passage of said optical filtering passage is kept away and is provided with reflector layer, to strengthen light.Can receive the light signal that the corresponding light signal location of optical filtering passage is sent so that guarantee the corresponding light activated element of optical filtering passage.
The said passage of said optical filtering passage is kept away and is provided with dark coating, to absorb light.The light activated element that passage is corresponding so that avoid filtering is received the light signal that the corresponding light signal location of other optical filtering passages is sent.
Said microprocessor system adopts the microprocessor system of television set top box.Optical touch screen of the present invention carries out signal with television set top box and is connected, and with the shared microprocessor of television set top box system, realize touch operation to televisor.
Said microprocessor system adopts the microprocessor system of computer.Optical touch screen of the present invention carries out signal with computer and is connected, and with the shared microprocessor of computer system, realize touch operation to computer.
Said microprocessor system connects a wireless local area network communications module, needs the equipment of touch operation to carry out signal through wireless mode with the external world and is connected, and realizes the touch operation function.
Said microprocessor system connects a bluetooth communication, and the mode and the external world through Bluetooth transmission need the bluetooth equipment of touch operation to carry out signal to be connected, to realize the touch operation function.
Said microprocessor system connects an infrared communication module, and the mode and the external world through infrared transmission need the infrared equipment of touch operation to carry out signal to be connected, to realize the touch operation function.
When existing the said light activated element of even number to receive the light of said luminous point place reflection in same row's the optical filtering passage; Be regarded as the middle parts that luminous point is positioned at the light signal zone at middle two said light activated element places; Said signal processing module produces touch signal; And touch signal passed to said microprocessor system, the middle part of the light signal receiving area at two said light activated elements places was associated with on the said touch pad in the middle of said microprocessor system will be positioned at.
When existing the said light activated element of odd number to receive the light of said luminous point place reflection in same row's the optical filtering passage; Be regarded as the light signal zone that luminous point is positioned at middle light activated element place; Said signal processing module produces touch signal; And touch signal passed to said microprocessor system, the light signal zone association at the light activated element place in the middle of said microprocessor system will be positioned at is to said touch pad.
In order further to improve the touch-screen precision; The light inlet of at least two said optical filtering passages of same row forms at least two light signal receiving areas in said touch pad the place ahead; And when having the overlapping region; Light activated element at least two said optical filtering passages is all received the light signal that said luminous point place sends and when responding, and said microprocessor system is regarded as the overlapping region that said luminous point is positioned at two said signal receiving areas.Said overlapping region can be two light signal receiving areas formations of overlapping, and also can be three, four or the more a plurality of light signals receiving area formation of overlapping.
Comprise that at least two said light signals receive head, at least two said light signals receive a pairing light signal zone and have intersection.
At least two said light signals receive the both sides that head is separately positioned on said touch pad.
At least two said light signals receive the place ahead that head is separately positioned on said touch pad.
Said signal processing module is handled a light signal and is received header, obtains luminous point and is positioned at light signal zone; Said signal processing module is handled another light signal and is received header; Obtain luminous point and be positioned at another light signal zone; Said signal processing module produces touch signal; And touch signal passed to said microprocessor system, said microprocessor system will be positioned at the light signal zone association of light signal zone and another light signal zone crossover location to said touch pad, and then the position of definite luminous point on touch pad.
The light signal of one luminous point is received and identified by the light activated element of two said optical filtering passages of the same row of light signal reception head at least; Also received and identified by the light activated element of at least one said optical filtering passage of another light signal reception head; Then; Said microprocessor system is judged as said luminous point and is positioned at the overlapping region in light signal zone that a light signal receives at least two said optical filtering passages of a same row, receives the overlapping region in light signal zone of at least one said optical filtering passage of head with another light signal.
Through increasing above-mentioned algorithm, can further effectively improve the touch precision.
Comprise that also one touches part, touch part and produce light beam that said light beam forms a luminous point on said touch pad.The light beam that said touch part produces can adopt laser, on touch pad, forms luminous point through laser.
Said touch part can adopt the remote touch pen; Said remote touch pen comprises laser instrument, power supply; Also have signal generating module, power supply connects signal generating module, and signal generating module connects laser instrument; Signal generating module produces the electric signal of vibration, and drive laser is sent the laser signal with the corresponding flicker of electric signal.The remote touch pen is realized the respective remote operation through the Long-distance Control luminous point to optical touch screen.The remote touch pen is provided with switch.
Touch part and comprise a light-emitting component, the light-emitting component that touches part triggering touch part when touching said touch pad is luminous, on touch pad, forms luminous point.
Said touch part can adopt the short range felt pen, and said short range touch pad comprises a shell, power supply, switch and light-emitting component, the luminous situation of switch control light-emitting component; Switch is connected with the touch end of short range felt pen, touches end trigger switch when touching touch pad, and light-emitting component is luminous, on touch pad, forms luminous point.The short range felt pen is luminous when contacting with touch pad, on touch pad, forms a luminous point, and luminous point moves with the short range felt pen, thereby realizes the touch operation of short range felt pen to optical touch screen through luminous point.
Also comprise the linear laser device, said linear laser device is arranged on a side of said touch pad, and said linear laser device forms one deck laser emitting line parallel with said touch pad in the touch scope of said touch pad;
When touching part touch touch pad, block the laser emitting line, form luminous point.
Said linear laser device adopts a word line shape laser instrument, and a word line shape laser instrument can be arranged on the offside that said light signal receives head.When touch pad is big; A said word line shape laser instrument can be set to a plurality of; A plurality of word line shape laser instruments can be arranged on the side of touch pad, also can be provided with as required, as long as one deck laser emitting line that an a plurality of word line shape laser instrument forms covers the touch scope of touch pad.
A said word line shape laser instrument is at least two; And number is identical with the number that said light signal receives head; A said word line shape laser instrument is arranged on the offside that said light signal receives head; The flicker frequency of the light that sends of at least two said word line shape laser instruments is different, and said light signal receives a laser that a word line shape laser instrument that receives offside respectively sends.With the frequency of a word line shape laser instrument transfer open after, each touch location detection module can receive a corresponding word line shape laser instrument, accomplishes the scanning of luminous point.
Said light signal receives head and is at least two, and a said word line shape laser instrument is one, as long as one deck laser emitting line that this word line shape laser instrument forms covers the touch scope of touch pad.Said signal processing module adopts the mode of timesharing scanning, and timesharing receives at least two said light signals and receives the reception information that hair send.Above-mentioned design can reduce the number of linear laser device, and then reduces cost.
Beneficial effect: owing to adopt technique scheme, the present invention is not only simple in structure, with low cost, and can use less device, realizes the function that high precision touches.
Description of drawings
Fig. 1 receives a kind of structural representation of head for light signal of the present invention;
Fig. 2 receives the another kind of structural representation of head for light signal of the present invention;
Fig. 3 is a kind of structural representation of the present invention;
Fig. 4 is an another kind of structure side view of the present invention;
Fig. 5 is an another kind of structural representation of the present invention;
Fig. 6 is an another kind of structural representation of the present invention;
Fig. 7 is an another kind of structural representation of the present invention;
Fig. 8 is an another kind of structural representation of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, further set forth the present invention below in conjunction with concrete diagram.
Referring to figs. 1 through Fig. 8; Optical touch screen; Comprise a touch pad 1, the touch location detection module of a detected touch point position, a microprocessor system, the touch location detection module comprises a signal processing module, and the touch location detection module comprises that also a light signal receives 2; Light signal receives 2 and is provided with light activated element, and light activated element connects signal processing module.Light signal receives 2 and comprises at least four optical filtering passages 21.Optical filtering passage 21 1 ends are provided with a light inlet, and the other end of optical filtering passage 21 is provided with light activated element 22, the conduit wall of the conduit wall of optical filtering passage 21 for being made up of light screening material.Light activated element 22 receives the light of light inlet in the zone, so that light inlet the place ahead forms an effective light signal receiving area.The light inlet of four optical filtering passages 21 forms at least four light signal receiving areas towards touch pad 1 position in touch pad 1 the place ahead.And four light signal receiving areas are not exclusively overlapping or not overlapping fully.
On touch pad 1, forming one can be the touch point with luminous point 3 by the luminous point 3 of said touch location detection module identification.The light signal that luminous point 3 places send is touched after at least one light activated element 22 in the position detecting module receives, and produces touch signal, and touch signal is passed to the microprocessor system.Light activated element 22 can adopt infrared receiving terminal.With simplified system and the signal Processing amount that reduces the touch location detection module.
Whether each light activated element 22 in the detection module constantly timesharing scanning spot 3 exists, and the location.The microprocessor system is regarded as the pairing light signal of the light inlet receiving area that luminous point 3 is positioned at the light activated element 22 place optical filtering passages 21 that receive light signal, and the light signal receiving area is associated with on the touch pad 1.Above-mentioned design can be with reference to the background picture, and control is convenient, is specially adapted to control electrical equipment such as televisor, air-conditioning.Light activated element 22 scanning spots 3 are adopted in above-mentioned design, make the touch location detection module have remarkable advantages such as simple in structure, with low cost, that Installation and Debugging are simple.
With reference to Fig. 1, Fig. 2, the inner width of optical filtering passage 21 are: light inlet width at one end greater than 22 width at one end of light activated element, and width at one end at one end reduces to 22 of light activated elements from light inlet gradually.At least four optical filtering passages 21 are arranged in order, and arrangement mode is that 22 of light activated elements are at one end adjacent, and light inlet institute is at one end adjacent.
With reference to Fig. 1, Fig. 3, at least four optical filtering passages 21 are arranged in order into a row.Realize light signal receive 2 be arranged on touch pad 1 avris, carry out scanning spot 3.Optical filtering passage 21 is flat fan-shaped, sector and touch pad 1 place plane parallel; At least four optical filtering passages 21 are sequentially arranged in touch pad 1 and belong on the parallel plane plane, form a row.Optical filtering passage 21 also can be hollow tubular, and at least four optical filtering passages 21 are sequentially arranged in touch pad 1 and belong on the parallel plane plane, form a row.With reference to Fig. 3; An avris place of touch pad 1 is provided with light signal and receives 2; Light signal receives 2 and comprises 22, four light activated elements 22 of four light activated elements corresponding light signal zone 1a, light signal zone 1b, light signal zone 1c, light signal zone 1d on touch pad 1.When the luminous point 3 that touches part formation was in 1a place, light signal zone, light activated element 2a received the light of luminous point 3 reflections, and signal processing module is received the reception information that light activated element 2a sends, and confirmed that touch signal is in the 1a scope of light signal zone.
With reference to Fig. 2, Fig. 4, at least four optical filtering passages 21 are arranged in order at least two rows.Realize light signal receive 2 be arranged on touch pad 1 the place ahead, carry out scanning spot 3.The light inlet of optical filtering passage 21 is towards touch pad 1, and pairing light signal receiving area corresponding (mapping) is on touch pad 1.Optical filtering passage 21 is taper, and optical filtering passage 21 is a pyramid.
Light inlet is provided with optical filter.So that the uncorrelated light signal of filtering.Light signal receives at least four light inlets of 2 and adopts same optical filter.The passage of optical filtering passage 21 is kept away and is provided with reflector layer, to strengthen light.Can receive the light signal that optical filtering passage 21 corresponding light signal location are sent so that guarantee optical filtering passage 21 corresponding light activated elements 22.The passage of optical filtering passage 21 is kept away and is provided with dark coating, to absorb light.Passage 21 corresponding light activated elements 22 are received the light signal that light signal location of other optical filtering passage 21 correspondences are sent so that avoid filtering.
The microprocessor system adopts the microprocessor system of television set top box.Optical touch screen of the present invention carries out signal with television set top box and is connected, and with the shared microprocessor of television set top box system, realize touch operation to televisor.The microprocessor system adopts the microprocessor system of computer.Optical touch screen of the present invention carries out signal with computer and is connected, and with the shared microprocessor of computer system, realize touch operation to computer.The microprocessor system connects a wireless local area network communications module, needs the equipment of touch operation to carry out signal through wireless mode with the external world and is connected, and realizes the touch operation function.The microprocessor system connects a bluetooth communication, and the mode and the external world through Bluetooth transmission need the bluetooth equipment of touch operation to carry out signal to be connected, to realize the touch operation function.The microprocessor system connects an infrared communication module, and the mode and the external world through infrared transmission need the infrared equipment of touch operation to carry out signal to be connected, to realize the touch operation function.
When existing even number light activated element 22 to receive the light of luminous point 3 places reflection; Be regarded as the middle parts that luminous point 3 is positioned at the light signal zone at middle two light activated elements 22 places; Signal processing module produces touch signal; And touch signal passed to the microprocessor system, the middle part of the light signal receiving area at two light activated elements 22 places was associated with on the touch pad 1 in the middle of the microprocessor system will be positioned at.For example among Fig. 5; Luminous point 3 is positioned at the medium position of light signal zone 1a and light signal zone 1b; Light activated element 2a and light activated element 2b all receive the light of luminous point 3 reflections; Signal processing module is received the reception information that light activated element 2a and light activated element 2b send respectively, according to above-mentioned determination methods, confirms the light signal zone 1a of touch signal on touch pad 1 and the middle part of light signal zone 1b.
When existing odd number light activated element 22 to receive the light of luminous point 3 places reflection; Be regarded as the light signal zone that luminous point 3 is positioned at middle light activated element 22 places; Signal processing module produces touch signal; And touch signal passed to the microprocessor system, the light signal zone association at light activated element 22 places in the middle of the microprocessor system will be positioned at is to touch pad 1.For example among Fig. 6; Though luminous point 3 is positioned at 1b place, light signal zone; But light activated element 2a, light activated element 2b, light activated element 2c all receive the light of luminous point 3 reflections; Signal processing module is received the reception information that light activated element 2a, light activated element 2b, light activated element 2c send respectively, according to above-mentioned determination methods, confirms that touch signal is in the 1b scope of the light signal zone at the light activated element 2b place of centre.
In order further to improve the touch-screen precision; The light inlet of at least two optical filtering passages 21 of same row forms at least two light signal receiving areas in touch pad 1 the place ahead; And when having the overlapping region, the light activated element 22 at least two optical filtering passages 21 is all received the light signal that luminous point 3 places send and when responding.The microprocessor system is regarded as the overlapping region that luminous point 3 is positioned at two signal receiving areas.The overlapping region can be two light signal receiving areas formations of overlapping, and also can be three, four or the more a plurality of light signals receiving area formation of overlapping.
With reference to Fig. 7, the present invention can comprise that at least two light signals receive 2, and at least two light connect signal and receive 2 a pairing light signals zone and exist and intersect.At least two light signals receive 2 be separately positioned on touch pad 1 both sides.At least two light signals receive 2 be separately positioned on touch pad 1 the place ahead.Signal processing module is handled a light signal and is received 2 information; Obtain luminous point 3 and be positioned at light signal zone; Signal processing module is handled the information that another light signal receives head; Obtain luminous point 3 and be positioned at another light signal zone, signal processing module (or microprocessor system) is regarded as luminous point 3 and is positioned at light signal zone and another light signal zone crossover location, and signal processing module produces touch signal.And touch signal passed to the microprocessor system, the microprocessor system will be positioned at the light signal zone association of light signal zone and another light signal zone crossover location to touch pad 1, and then the position of definite luminous point 3 on touch pad 1.
For example among Fig. 7, the place, two side angles of touch pad 1 is provided with a light signal respectively and receives 2, and each light signal receives 2 and comprises four light activated elements.The light signal in left side receives four light activated elements of 2 and on touch pad 1, forms light signal zone 1a, light signal zone 1b, light signal zone 1c, the regional 1d of light signal.The light signal on right side receives four light activated elements of 2 and on touch pad 1, forms light signal zone 1e, light signal zone 1f, light signal zone 1g, the regional 1h of light signal.The light signal that signal processing module is handled earlier the left side receives the reception information that the light activated element in 2 sends, and obtains luminous point 3 and is positioned at light signal zone 1b scope.Then, the light signal that signal processing module is handled the right side receives the reception information that the light activated element in 2 sends, and obtains luminous point 3 and is positioned at light signal zone 1g scope.At last, signal processing module confirms that touch signal is positioned at the overlapping of light signal zone 1b and light signal zone 1g.
The light signal of one luminous point 3 is received at least two optical filtering passages 21 of a same row of 2 by a light signal light activated element 22 receives and identifies.Also received and identified by the light activated element of at least one optical filtering passage of another light signal reception head.Then, the microprocessor system is judged as luminous point 3 and is positioned at the overlapping region in light signal zone that a light signal receives at least two optical filtering passages 21 of 2 a same row, receives the overlapping region in light signal zone of at least one optical filtering passage of head with another light signal.
When the light activated element of at least two optical filtering passages of another light signal reception head receives and identifies.The residing position of luminous point also is that another light signal receives the overlapping region that head also can be the light signal zone of two optical filtering passages.
The formation of luminous point 3 can be adopted various ways, produces light beam such as touching part, and light beam forms a luminous point 3 on touch pad 1.The light beam that touches the part generation can adopt laser, on touch pad 1, forms luminous point 3 through laser.Touch part and can adopt the remote touch pen; The remote touch pen comprises laser instrument, power supply; Also have signal generating module, power supply connects signal generating module, and signal generating module connects laser instrument; Signal generating module produces the electric signal of vibration, and drive laser is sent the laser signal with the corresponding flicker of electric signal.The remote touch pen is realized the respective remote operation through Long-distance Control luminous point 3 to optical touch screen.The remote touch pen is provided with switch.
Touch part and comprise a light-emitting component, the light-emitting component that touches part triggering touch part when touching touch pad 1 is luminous, on touch pad 1, forms luminous point 3.Touch part and can adopt the short range felt pen, the short range felt pen comprises a shell, power supply, switch and light-emitting component, the luminous situation of switch control light-emitting component; Switch is connected with the touch end of short range felt pen, touches end trigger switch when touching touch pad 1, and light-emitting component is luminous, on touch pad 1, forms luminous point 3.The short range felt pen is luminous when contacting with touch pad 1, on touch pad 1, forms a luminous point 3, and luminous point 3 moves with the short range felt pen, thereby realizes the touch operation of short range felt pen to optical touch screen through luminous point 3.
With reference to Fig. 3, Fig. 5, Fig. 6, also comprise linear laser device 4, linear laser device 4 is arranged on a side of touch pad 1, and linear laser device 4 forms the parallel laser emitting line of one deck and touch pad 1 in the touch scope of touch pad 1.Linear laser device 4 preferred word line shape laser instruments when touching part touch touch pad 1, block the laser emitting line, form luminous point 3.Linear laser device 4 can be arranged on light signal and receive an offside of 2.When touch pad 1 is big; Linear laser device 4 can be set to a plurality of; A plurality of linear laser devices 4 can be arranged on the side of touch pad 1, also can be provided with as required, as long as one deck laser emitting line that a plurality of linear laser device 4 forms covers the touch scope of touch pad 1.With reference to Fig. 7; Linear laser device 4 is at least two, and number and light signal to receive a number of 2 identical, linear laser device 4 is arranged on light signal and receives an offside of 2; The frequency of at least two linear laser devices 4 is different, light signal receive 2 receive offside respectively the laser that sends of linear laser device 4.With the frequency of linear laser device 4 transfer open after, each touch location detection module can receive corresponding linear laser device 4, accomplishes the scanning of luminous point 3.With reference to Fig. 8, light signal receives 2 and be at least two, and linear laser device 4 is one, as long as the touch scope of one deck laser emitting line covering touch pad 1 that linear laser device 4 forms.Signal processing module adopts the mode of timesharing scanning, and timesharing receives at least two light signals and receives a reception information of 2 transmissions.Above-mentioned design can reduce the number of linear laser device 4, and then reduces cost.Among Fig. 8, adopt three light signals to receive 2, one linear laser devices 4.
Light signal of the present invention receives a light activated element in 2 and is arranged on manyly more, and it is high more to touch precision, and light signal of the present invention receives 2 and is arranged on manyly more, and it is also high more to touch precision.Such as, 1) light signal is set receives 2, light signal receives in 2 four light activated elements is set, and then touch pad the place ahead forms four light signal zones.Light signal is set receives 2, light signal receives in 2 and is provided with n light activated element, and then to form n light signal regional in touch pad the place ahead.2) two light signals are set and receive 2, each light signal receives in 2 and is provided with n light activated element, and then to form n * n light signal regional in touch pad the place ahead.Four light signals are set receive 2, each light signal receives in 2 and is provided with n light activated element, then touch pad the place ahead formation n
4Individual light signal zone.Like this, touch pad can be discerned n
4Individual luminous point makes the present invention adopt simple structure, realizes the high precision touch function.
When touch pad 1 of the present invention is widescreen or mosaic screen; Light signal receive 2 can be set to a plurality of; And light signal receives 2 can be arranged on touch pad 1 side edge; Also can be at the middle part of touch pad 1 or other lateral location light signal be set receive 2 at least one can receive the luminous point 3 at touch pad place in 2 the light activated element so that each light signal receives.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the instructions just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (10)
1. optical touch screen; The touch location detection module, the microprocessor system that comprise a touch pad, a detected touch point position; Said touch location detection module comprises a signal processing module, it is characterized in that, said touch location detection module comprises that also a light signal receives head; Said light signal receives head and is provided with light activated element, and said light activated element connects said signal processing module;
Said light signal receives head and comprises at least four optical filtering passages;
Said optical filtering passage one end is provided with a light inlet, and the other end of said optical filtering passage is provided with said light activated element, the conduit wall of the conduit wall of said optical filtering passage for being made up of light screening material;
Said light activated element receives the light of said light inlet in the zone, so that said light inlet the place ahead forms an effective light signal receiving area;
The light inlet of four said optical filtering passages forms at least four light signal receiving areas towards said touch pad position in said touch pad the place ahead; And four light signal receiving areas are not exclusively overlapping or not overlapping fully;
On said touch pad, forming one can be by the luminous point of said touch location detection module identification; After the light signal that said luminous point place sends is received by at least one the said light activated element in the said touch location detection module; Produce touch signal, and touch signal is passed to said microprocessor system; Said microprocessor system is regarded as said luminous point and is positioned at the pairing light signal of the light inlet receiving area that the light activated element that receives said light signal belongs to said optical filtering passage, and the light signal receiving area is associated with on the said touch pad.
2. optical touch screen according to claim 1 is characterized in that: said light activated element adopts infrared receiving terminal.
3. optical touch screen according to claim 1 is characterized in that: said microprocessor system connects a wireless local area network communications module, needs the equipment of touch operation to carry out signal through wireless mode with the external world and is connected, and realizes the touch operation function.
4. optical touch screen according to claim 2 is characterized in that: said microprocessor system connects an infrared communication module, and the mode and the external world through infrared transmission need the infrared equipment of touch operation to carry out signal to be connected, to realize the touch operation function.
5. according to claim 1,2,3 or 4 described optical touch screens; It is characterized in that: the width of said optical filtering channel interior is: said light inlet width at one end greater than said light activated element width at one end, and width at one end at one end reduces to said light activated element from said light inlet gradually.
6. optical touch screen according to claim 5 is characterized in that: at least four said optical filtering passages are arranged in order, and arrangement mode is that said light activated element institute is at one end adjacent, and said light inlet institute is at one end adjacent; Said optical filtering passage is flat fan-shaped, said sector and said touch pad place plane parallel; At least four said optical filtering passages are sequentially arranged in said touch pad and belong on the parallel plane plane, form a row; The light inlet of said optical filtering passage is towards said touch pad, and pairing light signal receiving area correspondence is on said touch pad.
7. optical touch screen according to claim 5; It is characterized in that: when existing the said light activated element of odd number to receive the light of said luminous point place reflection in same row's the optical filtering passage; Be regarded as the light signal zone that luminous point is positioned at middle light activated element place; Said signal processing module produces touch signal, and touch signal is passed to said microprocessor system, and the light signal zone association at the light activated element place in the middle of said microprocessor system will be positioned at is to said touch pad.
8. optical touch screen according to claim 5 is characterized in that: comprise that at least two said light signals receive head, at least two said light signals receive a pairing light signal zone and have intersection; Said signal processing module is handled a light signal and is received header, obtains luminous point and is positioned at light signal zone; Said signal processing module is handled another light signal and is received header; Obtain luminous point and be positioned at another light signal zone; Said signal processing module produces touch signal; And touch signal passed to said microprocessor system, said microprocessor system will be positioned at the light signal zone association of light signal zone and another light signal zone crossover location to said touch pad, and then the position of definite luminous point on touch pad.
9. optical touch screen according to claim 8 is characterized in that: the light signal of a luminous point is received and identified by the light activated element of two said optical filtering passages of the same row of light signal reception head at least; Also received and identified by the light activated element of at least one said optical filtering passage of another light signal reception head; Then; Said microprocessor system is judged as said luminous point and is positioned at the overlapping region in light signal zone that a light signal receives at least two said optical filtering passages of a same row, receives the overlapping region in light signal zone of at least one said optical filtering passage of head with another light signal.
10. according to claim 1,2,3 or 4 described optical touch screens; It is characterized in that: also comprise the linear laser device; Said linear laser device is arranged on a side of said touch pad, and said linear laser device forms one deck laser emitting line parallel with said touch pad in the touch scope of said touch pad;
When touching part touch touch pad, block the laser emitting line, form luminous point.
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 |
| CN201710191452.6A CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
| CN201610598941.9A CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
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 |
|---|---|---|---|
| CN201710191452.6A Division CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
| CN201610598910.3A Division CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
| CN201610598941.9A Division CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102819356A true CN102819356A (en) | 2012-12-12 |
| CN102819356B CN102819356B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710191452.6A Active CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
| CN201610598910.3A Active CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
| CN201610598941.9A Active CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
| CN201110150374.8A Active CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710191452.6A Active CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
| CN201610598910.3A Active CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
| CN201610598941.9A Active CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
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| Country | Link |
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| CN (4) | CN107145264B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107145264A (en) | 2017-09-08 |
| CN107145264B (en) | 2020-05-15 |
| CN106227391B (en) | 2019-09-17 |
| CN106249967A (en) | 2016-12-21 |
| CN106227391A (en) | 2016-12-14 |
| CN106249967B (en) | 2019-04-30 |
| CN102819356B (en) | 2017-05-10 |
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