CN108108066B - Method for generating the infrared light curtain for being parallel to screen - Google Patents
Method for generating the infrared light curtain for being parallel to screen Download PDFInfo
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- CN108108066B CN108108066B CN201711361077.1A CN201711361077A CN108108066B CN 108108066 B CN108108066 B CN 108108066B CN 201711361077 A CN201711361077 A CN 201711361077A CN 108108066 B CN108108066 B CN 108108066B
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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
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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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
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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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)
- Multimedia (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a kind of method for generating the infrared light curtain for being parallel to screen, the method includes：At least two infra-red laser diodes are placed on screen, it is made to emit infrared beam；Reflection platform is set in the exit direction of light beam；Target is set between infra-red laser diode and reflection platform, multiple laser beam perforations are provided on target, laser beam perforation and reflection platform are arranged so that：The light beam of what infra-red laser diode was sent out be parallel to screen can sequentially pass through the laser beam perforation on target, finally form speck on reflection platform；It is detected with detection sensor and whether there is speck on reflection platform, when there is the speck different from the number of infra-red laser diode, implement the adjusting to infra-red laser diode in each dimension, keeps the number for finally reflecting the speck formed on platform identical with the number of infra-red laser diode.The invention avoids detection process to depend on contact identification software unduly, reduces corresponding cost.
Description
Technical field
The present invention relates to technical field of intelligent interaction, and in particular to a kind of for generating the infrared light curtain for being parallel to screen
Method.
Background technology
In the screen touch-control man-machine interactive system based on infrared light curtain, existing infrared light curtain is emitted by multiple lasers
Fan-shaped infrared surface be formed by stacking.Since infrared light is black light, so judging the light beam and screen that multiple lasers are sent out
It is whether parallel difficult.
Current main method is to act on finger and carry out touch-control on screen, is located at the red of screen front (or back)
Outer camera can take finger contact image, judge whether light beam puts down with screen according to the area of finger contact in image
Row, such as：When finger contact area is smaller in finger contact image, judge that light beam is parallel with screen, when finger contact area
Significantly greater than finger area when, illustrate that light beam may be irradiated to the places such as the back of the hand, that is, light beam is not parallel with screen.This inspection
The accuracy rate and consistency of survey method all need to be further increased.
Invention content
For the situation that infrared light curtain in the prior art is not easy to be detected whether to be parallel to screen, the application propose by
Multiple infra-red laser diode transmitting infrared beams being placed on screen form infrared light curtain, and provide a kind of novel generation
The method for being parallel to the infrared light curtain of screen, the method includes：
At least two infra-red laser diodes are placed on screen, it is made to emit infrared beam；
Reflection platform is set in the exit direction of light beam；
Target is set between the infra-red laser diode and reflection platform, multiple laser are provided on the target
Perforation, the laser beam perforation and the reflection platform are arranged so that：What infra-red laser diode was sent out is parallel to the light of screen
Beam can sequentially pass through the laser beam perforation on target, finally form speck on the reflection platform；
It is detected with detection sensor and whether there is speck on the reflection platform, when in the presence of the number with infra-red laser diode
When the different speck of mesh, implement the adjusting to infra-red laser diode in each dimension, makes finally to reflect and formed on platform
The number of speck is identical with the number of infra-red laser diode.
In some embodiments, it is included in the exit direction of light beam setting reflection platform on the screen.
In some embodiments, it is included in the exit direction of light beam the setting reflection platform outside screen.
In some embodiments, the multiple laser beam perforation is column, the axis direction of the column laser beam perforation with it is flat
Row is identical in the beam exit direction of screen.
In some embodiments, the interval between multiple laser beam perforations can be adjusted.
In some embodiments, the distance between multiple laser beam perforations and the screen can be adjusted.
In some embodiments, target is affixed on to the surface of screen with adhesive material, or target is removably solid
Determine to screen.
In some embodiments, the detection sensor is infrared camera.
In some embodiments, the screen is to face screen or curve screens directly.
In some embodiments, reflection platform includes paper, lath or infrared backlight plate.
Method provided in an embodiment of the present invention for generating the infrared light curtain for being parallel to screen, compared with the existing technology and
Speech, the prior art depend on video camera to the capture of the reflected light at finger contact, related software to thinking design capture
The contact of image information is extracted and identification, entire detection process are related to the cooperation of hardware and software and the two, therefore, testing result
The influence factor being subject to is larger.And the proposition of the present invention then preferably solves the problems, such as these, avoids detection process to contact
Identification software is depended on unduly, and corresponding cost, entire detection process simple, intuitive, on the other hand, with one group of novelty are reduced
Low cost mode realize a kind of infrared light curtain being parallel to screen.
Description of the drawings
Fig. 1 is the signal provided by one embodiment of the present invention for generating the device for the infrared light curtain for being parallel to screen
Figure.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, Fig. 1 is the dress provided by one embodiment of the present invention for generating the infrared light curtain for being parallel to screen
The schematic diagram set.
Infra-red laser diode 101,102,103,104..., n are shown, these infra-red laser diodes can be set in Fig. 1
It sets on screen 21, such as the top of screen or the edge of screen, each infra-red laser diode send out infrared beam, Duo Gehong
The light beam that outer laser diode is sent out forms light curtain on the screen.It, can be right according to the needs of light curtain thickness evenness etc.
The light beam that multiple infra-red laser diodes are sent out is collimated and is focused.The light beam that infra-red laser diode is sent out is set to be collimated
It is the common technology of those skilled in the art with focusing, details are not described herein.For clarity, it is only sparsely shown in figure
In actual conditions, according to the needs of touch accuracy, more intensive two pole of infrared laser can be arranged in infra-red laser diode
Pipe.
Device for generating the infrared light curtain for being parallel to screen includes：At least two infra-red laser diodes 101,102,
103,104...,n；Adjustable installation part (not shown), the adjustable installation part can be implemented to swash to infrared according to actual needs
Adjusting of the optical diode in each dimension, including infra-red laser diode displacement in all directions and angle can be adjusted
Degree；Platform 41 is reflected, is placed in the exit direction of light beam；Target 31, is placed in the infra-red laser diode and reflection is flat
Between platform, multiple laser beam perforations 311,312 ... m are provided on the target, the laser beam perforation and reflection platform are set as
So that：The light beam of what infra-red laser diode was sent out be parallel to screen can sequentially pass through the laser beam perforation on target, finally exist
Speck is formed on the reflection platform；Detection sensor 51, is used to detect and whether there is speck on the reflection platform, when depositing
In the speck different from the number of infra-red laser diode, implement the adjusting to infra-red laser diode in each dimension,
Keep the number for finally reflecting the speck formed on platform identical with the number of infra-red laser diode.
It will elaborate below to more details.
As shown in Figure 1, target 31 is installed on the surface of screen 21, be provided on target 31 multiple laser beam perforations 311,
312 ..., m, wherein m is the integer more than 1, and m is greater than or equal to the number of infra-red laser diode, multiple on target 31
Laser beam perforation 311,312 ..., the distance of m to screen 21 it is consistent, when the light beam pass through target 31 on multiple laser beam perforations
311,312 ..., when m, the speck that can be detected sensor 51 and detect is formed on the reflection platform 41.
Reflection platform 41 be set on beam exit direction, can be located at screen 21 edge, or positioned at screen 21 it
Outside.In some embodiments of the invention, reflection platform 41 can be paper, lath or backlight etc..
In the present embodiment, target 31 can be pasted on the surface of screen 21 by adhesive material, such as：Target 31 can lead to
Cross the surface that glue or double faced adhesive tape are detachably secured to screen 21 together in 21 surface of screen or by various connectors.At this
Invent in some embodiments, multiple laser beam perforations 311,312 ..., the section of m can be cylindric, multilateral shape, ellipse
Shape etc. can specifically be determined according to the cross sectional shape of the laser beam of outgoing, multiple laser beam perforations 311,312 ..., the axis side of m
To identical as the beam exit direction of screen is parallel to, multiple laser beam perforations 311,312 ..., m along beam exit direction thickness
Degree needs to be more than predetermined threshold value, which can empirically be worth to set, such as：It can be by laser beam perforation along beam exit
The thickness in direction is set greater than 1cm etc., thickness of the laser beam perforation along beam exit direction it is more big can guarantee across light beam
It is parallel to screen.The multiple laser beam perforation 311,312 ..., the number of m can be more than and/or be equal to every group of laser diode
The number of middle laser diode, multiple laser beam perforations 311,312 ..., the distance between m can set in advance, also may be used
With according to multiple laser diodes 101,102,103 ..., the distance between n is adjusted.Such as：For one group of two pole of laser
It, can be according to several laser two of front when the outgoing beam of several laser diodes of front is parallel to screen for pipe
The distance between pole pipe adjusts the distance between laser beam perforation so that the distance between multiple laser beam perforations and this group of laser two
The distance between multiple laser diodes are identical in pole pipe.In another example in the case where being related to multigroup infra-red laser diode, group
Infra-red laser diode between group is spaced arrangement, or front and back on laser emitting direction is in two rows of placements, heel row
The light beam that sends out of infra-red laser diode be emitted from the gap between front-seat infra-red laser diode, difference group laser two
The distance between adjacent laser diode may be different in pole pipe, therefore, test the light of previous group laser diode sent out
When the light beam that next group of laser diode of beam and then test is sent out, by adaptively adjusting between multiple laser beam perforations
Distance enables to adapt to the distance between next group of laser diode, equal when being debugged to different groups of laser diodes
An identical target can be used, improve the flexibility of test, and resource can be saved.
Detection sensor 51 is used to detect the speck formed by black light on reflection platform 41, in some embodiments,
Detection sensor 51 can be infrared camera, if the light beam that sends out of some infra-red laser diode shape on reflection platform 41
At speck, then illustrate that light beam has passed through the laser beam perforation on target 31, the light beam which sends out is parallel to screen
Curtain illustrates that this is red on the contrary, if the light beam that some infra-red laser diode is sent out does not form speck on reflection platform 41
The light beam that outer laser diode is sent out is not parallel to screen 21, need to the exit direction of the light beam of the infra-red laser diode into
Row is adjusted.To realize that the adjusting, infra-red laser diode can be installed on an adjustable installation part, the adjustable installation
The adjusting in each dimension to infra-red laser diode may be implemented in part according to actual needs, including can adjust infrared laser
Diode displacement in all directions and angle, the corresponding adjustable installation part of each infra-red laser diode can be fixed on
On one common pedestal.When being related to multigroup infra-red laser diode, every group of infra-red laser diode can be fixed on difference
Pedestal on, to convenient after having adjusted one group of infra-red laser diode, as needed by this group of infra-red laser diode shifting
It walks, and moves into another group of infra-red laser diode.Belong to optical path adjusting mistake in view of the adjustable installation part and its regulative mode
Device is commonly used in journey to be therefore not detailed herein.
In some embodiment of the invention, the screen can be the screen of arbitrary material and shape, such as：Liquid crystal,
LED, DLP projection screen etc., the screen can face screen or curve screens directly.When screen is curve screens, each
Infra-red laser diode is neatly arranged in the top of screen along curved surface, correspondingly, target and reflection platform also edge
Curved surface to be arranged on screen.The light beam for being parallel to screen being emitted from infra-red laser diode again passes through swashing on target
Light is perforated, and forms speck on reflection platform, described in earlier in respect of figures 1, details are not described herein again.So as to ensure curved surface
The light curtain even density of screen surface, meanwhile, using provided in an embodiment of the present invention for generating the infrared light for being parallel to screen
The method of curtain, can ensure that light curtain is parallel to screen, and when infrared light curtain being avoided to be not parallel to screen, mistake is generated when user touches
Difference touches accuracy and sensitivity to improve.
Another embodiment of the present invention provides the detection method that infrared beam is parallel to screen, and the infrared light curtain is by multiple
The infra-red laser diode transmitting infrared beam being placed on screen is formed, as previously described；The method includes：
S11：At least two infra-red laser diodes are placed on screen, it is made to emit infrared beam.
S12：Reflection platform is set to the exit direction of light beam.
Such as：Reflection platform can be set to beam exit direction, be located on screen, such as positioned at screen edge；Or
Reflection platform can be set on beam exit direction, and except screen.In some embodiment of the invention, platform is reflected
Can be paper, backlight or lath etc..
S13：Target is set between the infra-red laser diode and reflection platform；It is provided on the target multiple
Laser beam perforation, the laser beam perforation and reflection platform are arranged so that：What infra-red laser diode was sent out is parallel to the light of screen
Beam can sequentially pass through the laser beam perforation on target, finally form speck on the reflection platform.
S14：It is detected with detection sensor and whether there is speck on the reflection platform, when presence and infra-red laser diode
Number different speck when, implement the adjusting to infra-red laser diode in each dimension, make finally to reflect shape on platform
At speck number it is identical with the number of infra-red laser diode.
Component involved by above each steps of S11-S14 and connection relation therein can be done with reference to front around Fig. 1
Description.
For example, can by target 31 multiple laser beam perforations 311,312 ..., the distance of m to screen 21 be set as one
Cause, when the light beam pass through target 31 on multiple laser beam perforations 311,312 ..., m when, formed on the reflection platform 41
The speck that can be taken by thermal camera.Can will reflection platform 41 be set on beam exit direction, herein under the premise of,
Reflection platform can be for example set to the edge of screen 21, or be set to except screen 21.In some implementations of the present invention
In example, reflection platform 41 can be paper, lath or infrared light backlight etc., and the presence of the backlight is being observed convenient for human eye
The region for substantially needing to observe quickly is navigated to when thermal camera, the light intensity of backlight can be very weak, only provides an observation
Guide.
Target 31 can be pasted on the surface of screen 21 with adhesive material or be removably fixed to screen.
The respective shapes of each laser beam perforation can be designed according to the cross sectional shape of the laser beam of outgoing, and make target
Multiple laser beam perforations 311 on 31,312 ..., the axis direction of m it is identical as the beam exit direction of screen is parallel to, along light
The thickness of beam-emergence direction needs to meet certain preset value, which can empirically be worth to obtain, to ensure light beam energy
Enough parallel passes through laser beam perforation.Can make multiple laser beam perforations 311 on the target 31,312 ..., the number of m can be with
It is more than and/or the number of equal to every group infra-red laser diode mid-infrared laser diode, multiple laser beam perforations on target 31
311,312 ..., the distance between m can be set in advance, can also according to multiple infra-red laser diodes 101,
102,103 ..., the distance between n is adjusted.For example, in the case where being related to multigroup infra-red laser diode, group and group
Between infra-red laser diode be spaced arrangement, or it is front and back on laser emitting direction placed in two rows of, heel row it is red
The light beam that outer laser diode is sent out is emitted from the gap between front-seat infra-red laser diode, difference group infrared laser two
The distance between adjacent infra-red laser diode may be different in pole pipe, therefore, test previous group infra-red laser diode hair
It, can be by adaptively adjusting target 31 when testing the light beam that next group of infra-red laser diode is sent out after the light beam gone out
The distance between upper multiple laser beam perforations, enable to adapt to the distance between next group of infra-red laser diode, so that
Aforementioned target can be used when being debugged to different groups of infra-red laser diodes, improve the flexibility of test, and can save
Resource-saving.
Detection sensor 51 can reflect the speck formed by black light on platform 41 with captured in real-time, if some is infrared
The light beam that laser diode is sent out forms speck on reflection platform, then illustrates that light beam has passed through the laser beam perforation on target 31,
The light beam that the infra-red laser diode is sent out is parallel to screen；On the contrary, if the light beam that some infra-red laser diode is sent out does not have
Have and form speck on reflection platform 41, then illustrates that the light beam that the infra-red laser diode is sent out is not parallel to screen 21, need
The beam exit direction of the infra-red laser diode is adjusted.To realize that the adjusting, infra-red laser diode can be pacified
Loaded on an adjustable installation part, which may be implemented to infra-red laser diode each according to actual needs
Adjusting in a dimension, including infra-red laser diode displacement in all directions and angle can be adjusted；It is each infrared sharp
The corresponding adjustable installation part of optical diode can be fixed on a common pedestal.When being related to multigroup infra-red laser diode
When, every group of infra-red laser diode can be fixed on different pedestals, and one group of two pole of infrared laser is being adjusted to convenient
Guan Hou as needed removes this group of infra-red laser diode, and moves into another group of infra-red laser diode.In view of described adjustable
During section installation part and its regulative mode belong to optical path adjusting therefore common device is not detailed herein.
Although it should be noted that the present embodiment with step S11 to step S14 to provided by the present invention for generate it is parallel
It is illustrated, but the method provided by the invention is not limited because of above-mentioned steps in the method for the infrared light curtain of screen
It is fixed, that is to say, that in some cases, the action recorded in detail in the claims or step can be according to different from the present embodiment
In sequence execute and desired result still may be implemented.In some embodiments, multitasking and parallel place
It manages also possible or it may be advantageous.
The prior art mentioned by the application introductory song depends on video camera catching to the reflected light at finger contact
It obtains, related software extracts and identify that entire detection process is related to hardware and software to the contact for the image information that video camera captures
And the cooperation of the two, therefore, the influence factor that testing result is subject to is larger.And the proposition of the present invention then preferably solves these
Problem avoids detection process and is depended on unduly to contact identification software, reduces corresponding cost.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain subject to.
Claims (10)
1. a kind of method for generating the infrared light curtain for being parallel to screen, the method includes：
At least two infra-red laser diodes are placed on screen, it is made to emit infrared beam；
Reflection platform is set in the exit direction of light beam；
Target is set between the infra-red laser diode and reflection platform, multiple laser are provided on the target and are worn
Hole, the laser beam perforation and the reflection platform are arranged so that：What infra-red laser diode was sent out is parallel to the light beam of screen
The laser beam perforation on target can be sequentially passed through, finally forms speck on the reflection platform；
Detected with detection sensor and whether there is speck on the reflection platform, when presence and infra-red laser diode number not
With speck when, implement adjusting to infra-red laser diode in each dimension, make finally to reflect the speck formed on platform
Number it is identical with the number of infra-red laser diode.
2. the method for being used to generate the infrared light curtain for being parallel to screen according to claim 1, which is characterized in that be included in light
Platform is reflected in setting on the screen in the exit direction of beam.
3. the method according to claim 1 for generating the infrared light curtain for being parallel to screen, which is characterized in that be included in
Platform is reflected in setting except screen in the exit direction of light beam.
4. the method according to claim 3 for generating the infrared light curtain for being parallel to screen, which is characterized in that described more
A laser beam perforation is column, and the axis direction of the column laser beam perforation is identical as the exit direction for the light beam for being parallel to screen.
5. the method for being used to generate the infrared light curtain for being parallel to screen according to any one of claims 1-4, feature
It is, the interval between multiple laser beam perforations can be adjusted.
6. the method for being used to generate the infrared light curtain for being parallel to screen according to any one of claims 1-4, feature
It is, the distance between multiple laser beam perforations and the screen can be adjusted.
7. the method for being used to generate the infrared light curtain for being parallel to screen according to any one of claims 1-4, feature
It is, target is affixed on to the surface of screen with adhesive material, or target is removably fixed to screen.
8. the method for being used to generate the infrared light curtain for being parallel to screen according to any one of claims 1-4, feature
It is, the detection sensor is infrared camera.
9. the method for being used to generate the infrared light curtain for being parallel to screen according to any one of claims 1-4, feature
It is, the screen is to face screen or curve screens directly.
10. the method for being used to generate the infrared light curtain for being parallel to screen according to any one of claims 1-4, feature
It is, reflection platform includes paper, lath or infrared backlight plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711361077.1A CN108108066B (en) | 2017-12-18 | 2017-12-18 | Method for generating the infrared light curtain for being parallel to screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711361077.1A CN108108066B (en) | 2017-12-18 | 2017-12-18 | Method for generating the infrared light curtain for being parallel to screen |
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| CN108108066B true CN108108066B (en) | 2018-11-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2682371Y (en) * | 2004-03-17 | 2005-03-02 | 中国人民解放军63856部队 | Combined parallel laser light curtain target |
| CN106370130A (en) * | 2016-08-17 | 2017-02-01 | 苏州苍龙电子科技有限公司 | Detection device and method for the parallelism of infrared light curtain and large screen |
| CN107121265A (en) * | 2017-05-10 | 2017-09-01 | 深圳市惠富康光通信有限公司 | The detection device and control method of a kind of C lens assembly technologies |
| CN206757077U (en) * | 2017-03-17 | 2017-12-15 | 上海葛世工业自动化有限公司 | The test of safe light curtain and adjusting apparatus and security system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9347833B2 (en) * | 2013-10-10 | 2016-05-24 | Qualcomm Incorporated | Infrared touch and hover system using time-sequential measurements |
-
2017
- 2017-12-18 CN CN201711361077.1A patent/CN108108066B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2682371Y (en) * | 2004-03-17 | 2005-03-02 | 中国人民解放军63856部队 | Combined parallel laser light curtain target |
| CN106370130A (en) * | 2016-08-17 | 2017-02-01 | 苏州苍龙电子科技有限公司 | Detection device and method for the parallelism of infrared light curtain and large screen |
| CN206757077U (en) * | 2017-03-17 | 2017-12-15 | 上海葛世工业自动化有限公司 | The test of safe light curtain and adjusting apparatus and security system |
| CN107121265A (en) * | 2017-05-10 | 2017-09-01 | 深圳市惠富康光通信有限公司 | The detection device and control method of a kind of C lens assembly technologies |
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| CN108108066A (en) | 2018-06-01 |
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