CN109066288A - Control system, the control method of terminal and laser projecting apparatus of laser projecting apparatus - Google Patents
Control system, the control method of terminal and laser projecting apparatus of laser projecting apparatus Download PDFInfo
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- CN109066288A CN109066288A CN201810540382.5A CN201810540382A CN109066288A CN 109066288 A CN109066288 A CN 109066288A CN 201810540382 A CN201810540382 A CN 201810540382A CN 109066288 A CN109066288 A CN 109066288A
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- laser
- projecting apparatus
- laser projecting
- microprocessor
- parameter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
Abstract
The invention discloses a kind of control systems of laser projecting apparatus.Laser projecting apparatus can project laser to target object.Control system includes infrared camera, the first driving circuit, microprocessor and application processor.Infrared camera can be received by the modulated laser pattern of target object.First driving circuit connect with laser projecting apparatus and is used to that laser projecting apparatus to be driven to project laser.Microprocessor is for handling laser pattern to obtain the distance between human eye and laser projecting apparatus.Application processor is used for according to the corresponding control signal of the distance between human eye and laser projecting apparatus transmission to microprocessor.Microprocessor controls the first driving circuit according to control signal, so that laser projecting apparatus projects laser with predefined parameter.Control system controls the parameter of laser projecting apparatus projection laser according to the distance between human eye and laser projecting apparatus, to prevent from generating harm to the eyes of user.In addition, the invention also discloses the control methods of a kind of terminal and laser projecting apparatus.
Description
Technical field
The present invention relates to consumer electronics technical fields, more specifically, be related to a kind of laser projecting apparatus control system,
The control method of terminal and laser projecting apparatus.
Background technique
Laser generator can be configured on mobile phone, laser projecting apparatus can project the laser with predetermined pattern information, and
The laser figure reflected by target user is obtained by laser projection to the target user being positioned in the space, then by imaging device
Case, further to obtain the depth image of target user.It is easy however, the laser controlling of laser projecting apparatus projection is improper to user
Eyes damage.
Summary of the invention
Embodiment of the present invention provides a kind of control system of laser projecting apparatus, the controlling party of terminal and laser projecting apparatus
Method.
The laser projecting apparatus of embodiment of the present invention can project laser, the control of the laser projecting apparatus to target object
System includes:
Infrared camera, the infrared camera can be received by the modulated laser pattern of the target object；
First driving circuit, first driving circuit connect with the laser projecting apparatus and are used to that the laser to be driven to throw
Emitter projects laser；
Microprocessor, the microprocessor and the infrared camera, the microprocessor and first driving circuit
It is all connected with, the microprocessor is for handling the laser pattern to obtain the distance between human eye and the laser projecting apparatus；
With
Application processor, the application processor are connect with the microprocessor, and the application processor is used for according to institute
It states the distance between human eye and the laser projecting apparatus and sends corresponding control signal to the microprocessor, the microprocessor
First driving circuit is controlled according to the control signal, so that the laser projecting apparatus projects laser with predefined parameter.
The terminal of embodiment of the present invention includes:
Laser projecting apparatus；With
Control system described in any of the above-described embodiment, first driving circuit are connect with the laser projecting apparatus.
The laser projecting apparatus of embodiment of the present invention is connect with the first driving circuit, the control method of the laser projecting apparatus
Include:
First driving circuit drives the laser projecting apparatus to project laser to target object；
Infrared camera is received by the modulated laser pattern of the target object；
Laser pattern described in microprocessor processes is to obtain the distance between human eye and the laser projecting apparatus；
Application processor according to the corresponding control signal of the distance between the human eye and laser projecting apparatus transmission extremely
Microprocessor；With
The microprocessor according to the control signal control first driving circuit so that the laser projecting apparatus with
Predefined parameter projects laser.
Control system, the control method of terminal and laser projecting apparatus of the laser projecting apparatus of embodiment of the present invention, according to
The distance between human eye and laser projecting apparatus control the parameter of laser projecting apparatus projection laser, to prevent from producing the eyes of user
Raw harm.
The additional aspect and advantage of embodiments of the present invention will be set forth in part in the description, partially will be from following
Description in become obvious, or the practice of embodiment through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of the terminal of embodiment of the present invention；
Fig. 2 to Fig. 3 is the module diagram of the terminal of embodiment of the present invention；
Fig. 4 is the schematic diagram of the current parameters of the laser projecting apparatus projection laser of embodiment of the present invention；
Fig. 5 is the schematic diagram of the frame per second parameter of the laser projecting apparatus projection laser of embodiment of the present invention；
Fig. 6 is the schematic diagram of the width parameter of the laser projecting apparatus projection laser of embodiment of the present invention；
Fig. 7 to Figure 11 is the flow diagram of the control method of the laser projecting apparatus of embodiment of the present invention；
Figure 12 is the structural schematic diagram of the laser projection component of embodiment of the present invention；
Figure 13 to Figure 15 is the partial structure diagram of the laser projecting apparatus of embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described further below in conjunction with attached drawing.Same or similar label is from beginning in attached drawing
To the same or similar element of expression or element with the same or similar functions eventually.
In addition, the embodiments of the present invention described with reference to the accompanying drawing are exemplary, for explaining only the invention
Embodiment, and be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Fig. 1 and Fig. 2 are please referred to, the terminal 100 of embodiment of the present invention includes laser projecting apparatus 10,20 and of infrared camera
Control system 30.Terminal 100 can be mobile phone, tablet computer, smartwatch, Intelligent bracelet, intelligent wearable device etc., in this hair
In bright embodiment, it is illustrated so that terminal 100 is mobile phone as an example, it will be understood that the concrete form of terminal 100 is not limited to hand
Machine.
Laser projecting apparatus 10 can project laser to target object, and laser can be infrared light, while laser projecting apparatus 10
The laser of projection can be with the patterns such as specific speckle or striped.Infrared camera 20 can acquire the infrared of target object
Image, or receive by the modulated laser pattern of target object.In order to obtain relatively clear laser pattern, it usually needs
With certain optical power to the continuous transmitting multi-frame laser of target object.
Control system 30 includes the first driving circuit 31, the second driving circuit 32, application processor (Application
Processor) 33 and supervision timer 34, microprocessor 35 and range sensor 36.
First driving circuit 31 is connect with laser projecting apparatus 10, and the first driving circuit 31 can be used for driving laser projecting apparatus 10
Project laser, specifically, current source of first driving circuit 31 as laser projecting apparatus 10, if the first driving circuit 31 is closed
It closes, then laser projecting apparatus 10 can not launch outward laser.Second driving circuit 32 is connect with the first driving circuit 31, the second driving
Circuit 32 can be used for powering to the first driving circuit 31, such as the first driving circuit 31 can be DC/DC circuit.First driving electricity
Road 31 can be individually encapsulated into driving chip, and the second driving circuit 32 can also be individually encapsulated into driving chip, be also possible to
One drive circuit 31 and the second driving circuit 32 are mutually encapsulated into a driving chip, and driving chip can be set and swash
On the substrate or circuit board of light projector 10.
The system that application processor 33 can be used as terminal 100, application processor 33 can connect with the first driving circuit 31
It connects, application processor 33 can also be connect with infrared camera 20.Application processor 33 can also be with multiple electronics of terminal 100
Component connects and controls multiple electronic component and runs in predetermined patterns, such as the display screen display of controlling terminal 100
Show scheduled picture, the antenna of controlling terminal 100 sends or receives the visible image capturing head of scheduled data, controlling terminal 100
50 acquisition color images and handle the color image, the power supply for controlling infrared camera 20 opening and closing, close that (pwdn) is infrared takes the photograph
As head 20 or resetting (reset) infrared camera 20 etc..
Application processor 33 can also be used in the first driving circuit 31 of control and work to drive laser projecting apparatus 10 to project laser,
It is appreciated that in 33 operation troubles of application processor, such as when 33 delay machine of application processor, the first driving circuit 31 may be just
Benefit emits the state of laser, and the laser danger with higher persistently launched outward in lasting driving laser projecting apparatus 10
Property, may burn user, be particularly susceptible the eyes of harm users.Therefore, it is necessary to monitor the operating status of application processor 33, and
In 33 operation troubles of application processor, laser projecting apparatus 10 is closed in time.
In order to be monitored the operating status of application processor 33, application processor 33 is with predetermined time interval to monitoring
Timer 34 sends prearranged signals, such as sends reset signal to supervision timer 34 every 50 milliseconds, when application processor 33
When operation troubles, application processor 33 is unable to run the program that prearranged signals is sent to supervision timer 34, therefore can not send
Prearranged signals and be detected the malfunction of application processor 33.
Please continue to refer to Fig. 1 and Fig. 2, supervision timer 34 is connect with the first driving circuit 31, supervision timer 34 with answer
It is connected with processor 33, supervision timer 34 is for when not receiving prearranged signals in scheduled duration, closing the first driving electricity
Road 31 is to close laser projecting apparatus 10.Wherein scheduled duration can be what terminal 100 was set when leaving the factory, can also be according to use
Family carries out customized setting on the terminal 100.
Specifically, in the embodiment of the present invention, the concrete form of supervision timer 34 can be counter, supervision timer 34
After receiving prearranged signals, supervision timer 34 since one number with certain speed count down.If at application
It manages device 33 to work normally, before counting down to 0, application processor 33 can retransmit prearranged signals, and supervision timer 34 receives
To count down reset after to prearranged signals；If 33 irregular working of application processor, when supervision timer 34 count down to 0, prison
It is considered as depending on timer 34 and judges 33 operation troubles of application processor, supervision timer 34 issues signal-off first and drives electricity at this time
Road 31 is so that laser projecting apparatus 10 is closed.
In one example, supervision timer 34 can be set outside application processor 33, and supervision timer 34 can be
One plug-in timer chip, supervision timer 34 can be connected with an I/O pin of application processor 33 and be received
The prearranged signals that application processor 33 issues.The reliability that plug-in supervision timer 34 works is higher.In another example,
Supervision timer 34 can integrate in application processor 33, and the function of supervision timer 34 can be by application processor 33
Portion's timer is realized, so can simplify the hardware circuit design of control system 30.
In some embodiments, when supervision timer 34 is also used in scheduled duration not receive prearranged signals, hair
Out for restarting the reset signal of application processor 33.It has been observed that when supervision timer 34 do not received in scheduled duration it is pre-
When determining signal, application processor 33 has occurred and that failure, at this point, supervision timer 34 issues reset signal so that application processor
33 reset and work normally.
Specifically, in one example, reset signal can be received directly by application processor 33, and reset signal is being applied
Possess higher rank in the execution program of processor 33, application processor 33 preferentially can generate response to reset signal and go forward side by side
Row resets.In another example, reset signal is also sent on the reset chip hung on application processor 33 outside, multiple
Mandatory use processor 33 is resetted after the chip response reset signal of position.
In some embodiments, scheduled duration is [50,150] millisecond.Specifically, scheduled duration can be set to 50 millis
Second, 62 milliseconds, 75 milliseconds, 97 milliseconds, 125 milliseconds, 150 milliseconds etc. and the duration arbitrarily in above-mentioned section.It is appreciated that such as
Fruit scheduled duration is arranged too short, then application processor 33 is required excessively continually to send prearranged signals, can occupy using processing
The excessive processing space of device 33 and cause terminal 100 operation be easy to happen Caton.If scheduled duration setting is too long, apply
The failure of processor 33 cannot be detected in time, that is, cannot in time be closed laser projecting apparatus 10, be unfavorable for pacifying
Entirely use laser projecting apparatus 10.[50,150] millisecond is set by scheduled duration, can preferably take into account the fluency of terminal 100
And safety.
Referring to Fig. 2, microprocessor 35 can be processing chip, microprocessor 35 and application processor 33, microprocessor
35 are all connected with the first driving circuit 31, microprocessor 35 and infrared camera 20.
Microprocessor 35 is connect with application processor 33 so that application processor 33 can reset microprocessor 35, wake up
(wake) microprocessor 35, error correction (debug) microprocessor 35 etc., microprocessor 35 can pass through mobile industry processor interface
(Mobile Industry Processor Interface, MIPI) 351 is connect with application processor 33, specifically, micro process
Device 35 passes through credible performing environment (the Trusted Execution of mobile industry processor interface 351 and application processor 33
Environment, TEE) 331 connections, the data in microprocessor 35 are transmitted directly in credible performing environment 331.Its
In, code and region of memory in credible performing environment 331 are controlled by access control unit, cannot be executed by untrusted
Program in environment (Rich Execution Environment, REE) 332 is accessed, credible performing environment 331 and untrusted
Performing environment 332 can be formed in application processor 33.
Microprocessor 35 can pass through pulse width modulation interface (Pulse Width Modulation, PWM) 352 and
One drive circuit 31 connects, and microprocessor 35 and infrared camera 20 can pass through I2C bus (Inter-Integrated
Circuit) 70 connection, microprocessor 35 can provide the clock letter of acquisition infrared image and laser pattern to infrared camera 20
Breath, the infrared image and laser pattern that infrared camera 20 acquires can be transferred to micro- by mobile industry processor interface 351
In processor 35.
In one embodiment, the infrared template and depth for verifying identity be can store in credible performing environment 331
Template is spent, infrared template can be the face infrared image that user pre-enters, and depth template can be what user pre-entered
Face depth image.Infrared template and depth template are stored in credible performing environment 331, it is not easy to are tampered and be usurped, eventually
The safety of information in end 100 is higher.
When user needs to verify identity, microprocessor 35 controls the infrared image that infrared camera 20 acquires user, and
It is transmitted in the credible performing environment 331 of application processor 33 after obtaining the infrared image, application processor 33 is in credible execution
The infrared image is compared with infrared template in environment 331, if the two matches, infrared template is exported and is verified
Verification result.Compare whether it is matched during, infrared image and infrared template will not obtain by other programs, distort or
It usurps, improves the information security of terminal 100.
Further, microprocessor 35 can control the first driving circuit 31 driving laser projecting apparatus 10 and project outward and swashs
Light, and control infrared camera 20 and acquire the laser pattern modulated by target object, microprocessor 35 obtains and handles the laser
Pattern is to obtain depth image.The depth image is transmitted in the credible performing environment 331 of application processor 33, application processor
33 the depth image is compared with depth template in credible performing environment 331, if the two matches, exports depth
The verification result that template is verified.During whether comparison is matched, depth image and depth template will not be by other journeys
Sequence obtains, distorts or usurp, and improves the information security of terminal 100.
Range sensor 36 is connect with application processor 33, and range sensor 36 is for detecting human eye and laser projecting apparatus 10
The distance between.Range sensor 36 can be optical distance sensor, infrared distance sensor, ultrasonic distance sensor
Deng in embodiments of the present invention, being illustrated so that range sensor 36 is infrared distance sensor as an example.Range sensor 36 wraps
Infrared light emission end 361 and infrared optical receiving end 362 are included, infrared light emission end 361 is for emitting infrared light, infrared optical receiving end
362 infrared lights for receiving the transmitting of infrared light emission end 361 and being reflected through human body, with detect human eye and laser projecting apparatus 10 it
Between distance.Specifically, the intensity of the infrared light that range sensor 36 can be received according to infrared optical receiving end 362 detects people
The distance between eye and laser projecting apparatus 10.When the intensity for the infrared light that infrared optical receiving end 362 receives is stronger, human eye and swash
The distance between light projector 10 is closer；When the intensity for the infrared light that infrared optical receiving end 362 receives is weaker, human eye and laser
The distance between the projector 10 is remoter.Range sensor 36 can also be received according to infrared optical receiving end 362 infrared light with it is infrared
Light emitting end 361 emits the time difference between infrared light and detects the distance between human eye and laser projecting apparatus 10.When the time difference
Smaller, the distance between human eye and laser projecting apparatus 10 are closer；It is bigger when the time difference, between human eye and laser projecting apparatus 10
Distance is remoter.
Range sensor 36 can be detected before laser projecting apparatus 10 works human eye between laser projecting apparatus 10 at a distance from
It is closer, can also in 10 course of work of laser projecting apparatus real-time detection human eye between laser projecting apparatus 10 at a distance from.In this way,
When the distance between human eye and laser projecting apparatus 10 change, it can be also timely detected, be arranged accordingly to take
It imposes and avoids damaging human eye.
In one embodiment, range sensor 36 according to predetermined period detect between human eye and laser projecting apparatus 10 away from
From.For example, range sensor 36 is every 500 milliseconds of detections the distance between human eyes and laser projecting apparatus 10, with can and
When detect that the distance between human eye and laser projecting apparatus 10 change, and take into account the power consumption of terminal 100.
In order to ensure the laser that the infrared light that infrared light emission end 361 emits will not be projected with laser projecting apparatus 10 is mutually made
At interference, the frequency (or phase) that infrared light emission end 361 emits infrared light can project the frequency of laser with laser projecting apparatus 10
Rate (or phase) is different；Or the laser that the wavelength and laser projecting apparatus 10 of the infrared light of the transmitting of infrared light emission end 361 project
Wavelength can be different.For example, the wavelength for the infrared light that infrared light emission end 361 emits is λ 1, what laser projecting apparatus 10 projected
The wavelength of laser is λ 2, wherein 1 ≠ λ of λ 2.Corresponding, infrared optical receiving end 362 is infrared for a length of λ's 1 of received wave
Light, infrared camera 20 are used for the infrared light of a length of λ 2 of received wave.
Referring to Fig. 3, in some embodiments, detecting human eye and laser projecting apparatus 10 above by range sensor 36
The distance between mode could alternatively be: microprocessor 35 according to the received laser pattern of infrared camera 20 detect human eye with
The distance between laser projecting apparatus 10.At this point, a part of infrared camera 20 as control system 30.
Specifically, microprocessor 35 controls the first driving circuit 31 driving laser projecting apparatus 10 and swashs to target object projection
Light, and control infrared camera 20 and acquire the laser pattern modulated by target object, then microprocessor 35 obtains and handles this
Laser pattern detects the distance between human eye and laser projecting apparatus 10 to obtain initial depth image, further according to depth image.
It is appreciated that depth image includes depth data, microprocessor 35 according to depth image detect human eye and laser projecting apparatus 10 it
Between distance process are as follows: convert the point cloud data with three-dimensional coordinate for depth data, the format of point cloud data be (x, y,
z)；Then point cloud data is filtered, to remove outlier and noise；Further according to the point cloud data that Europe is filtered
Z value obtains the distance between human eye and laser projecting apparatus 10.In one example, microprocessor 35 can be according to point cloud data
Multiple z values in minimum value determine the distance between human eye and laser projecting apparatus 10, with ensure laser projection mould group 10 project
Laser the eyes of user will not be damaged.In the present embodiment, laser projecting apparatus 10 projects laser and is used for infrared distance measurement, swashs
The intensity for the laser that light projector 10 projects can be less than the intensity of the laser projected when laser projecting apparatus 10 works normally, to subtract
Few energy consumption and the safety for guaranteeing human eye in ranging process.
In one embodiment, laser projecting apparatus 10 projects laser to target object according to predetermined period, with periodically
Detect the distance between human eye and laser projecting apparatus 10.For example, laser projecting apparatus 10 projects one to target object every 500 milliseconds
The distance between secondary laser detection human eye and laser projecting apparatus 10, with can be timely detected human eye and laser projecting apparatus 10 it
Between distance change, and take into account the power consumption of terminal 100.
In some embodiments, microprocessor 35 can also control the infrared image that infrared camera 20 acquires user,
And the distance between human eye and laser projecting apparatus 10 are detected according to depth image combination infrared image.Specifically, microprocessor
35 can carry out the detection of face key point to determine the two-dimensional coordinate of human eye, then by infrared image and depth by infrared image
Image carries out registration alignment, searches character pair point corresponding with human eye in depth image according to the two-dimensional coordinate of human eye, then
The three-dimensional coordinate for obtaining character pair point obtains between human eye and laser projecting apparatus 10 further according to the three-dimensional coordinate of character pair point
Distance.For the mode for directly detecting the distance between human eye and laser projecting apparatus 10 according to depth image, this reality
The mode of applying can detect the specific location of human eye according to infrared image, detect that human eye and laser are thrown so as to more accurate
The distance between emitter 10.
After at a distance from detecting human eye between laser projecting apparatus 10 by above-mentioned each mode, 33 basis of application processor
The corresponding control signal of the distance between human eye and laser projecting apparatus 10 transmission is to microprocessor 35, and microprocessor 35 is further according to control
Signal processed controls the first driving circuit 31, so that laser projecting apparatus 10 projects laser with predefined parameter.
Specifically, the parameter include current parameters (or power parameter or other parameters being positively correlated with current parameters),
At least one of frame per second parameter, width parameter.In other words, microprocessor 35 controls the first driving circuit according to control signal
31, so that laser projecting apparatus 10 projects laser with scheduled current parameters；Or laser is projected with scheduled frame per second parameter；Or
Laser is projected with scheduled width parameter；Or laser is projected with scheduled current parameters and scheduled frame per second parameter；Or with
Scheduled current parameters and scheduled width parameter project laser；Or it is thrown with scheduled frame per second parameter and scheduled width parameter
Penetrate laser；Or laser is projected with scheduled current parameters, scheduled frame per second parameter and scheduled width parameter.
The laser that laser projecting apparatus 10 projects in order to prevent damages human eye, when between human eye and laser projecting apparatus 10
Distance get over hour, scheduled current parameters are smaller；Scheduled frame per second parameter is smaller；Scheduled width parameter is smaller.For example, false
If the distance between human eye and laser projecting apparatus 10 are d, as distance d >=20cm, laser projecting apparatus 10 can be to work normally
When current parameters I0, frame per second parameter F0, width parameter P0 project laser；As distance 10≤d < 20cm, laser projecting apparatus 10
Laser is projected with current parameters I1, frame per second parameter F1, width parameter P1；As distance d < 10cm, laser projecting apparatus 10 is with electric current
Parameter I2, frame per second parameter F2, width parameter P2 project laser, wherein I2 < I1 < I0, F2 < F1 < F0, P2 < P1 < P0.
To sum up, in the terminal 100 of embodiment of the present invention, control system 30 is according between human eye and laser projecting apparatus 10
Distance controlling laser projecting apparatus 10 projects the parameter of laser, specifically smaller at a distance from human eye is between laser projecting apparatus 10
When, current parameters, frame per second parameter and width parameter that laser projecting apparatus 10 projects laser are reduced, to prevent the eyes to user
Generate harm.
Incorporated by reference to Fig. 4, in some embodiments, the parameter that laser projecting apparatus 10 projects laser includes current parameters.It answers
First control signal is sent extremely when being used for processor 33 and be greater than preset distance at a distance from human eye is between laser projecting apparatus 10
Microprocessor 35.Microprocessor 35 controls the first driving circuit 31 according to first control signal, so that laser projecting apparatus 10 is with the
One current parameters project laser (shown in such as Fig. 4 (a)).Application processor 33 between human eye and the laser projecting apparatus 10 away from
Second control signal is sent to microprocessor 35 from when being less than or equal to preset distance.Microprocessor 35 is according to second control signal
The first driving circuit 31 is controlled, so that laser projecting apparatus 10 is with the second current parameters projection laser (shown in such as Fig. 4 (b)), wherein
Second current parameters are less than the first current parameters.It is appreciated that preset distance can be understood as the safe distance of human eye, work as human eye
When the distance between laser projecting apparatus 10 is greater than preset distance, as long as the diffraction optical element of laser projecting apparatus 10, collimation member
Situations such as part etc. is not ruptured, fallen off, laser projecting apparatus 10 can maintain current parameters (i.e. the first electric current ginseng when working normally
Number) projection laser.And when the distance between human eye and laser projecting apparatus 10 are less than or equal to preset distance, human eye and laser are thrown
The distance between emitter 10 is excessively close, and laser projecting apparatus 10 needs to reduce current parameters, to ensure eye-safe.
Incorporated by reference to Fig. 5, in some embodiments, the parameter that laser projecting apparatus 10 projects laser includes frame per second parameter.It answers
First control signal is sent extremely when being used for processor 33 and be greater than preset distance at a distance from human eye is between laser projecting apparatus 10
Microprocessor 35.Microprocessor 35 controls the first driving circuit 31 according to first control signal, so that laser projecting apparatus 10 is with the
One frame per second parameter projects laser (shown in such as Fig. 5 (a)).Application processor 33 between human eye and the laser projecting apparatus 10 away from
Second control signal is sent to microprocessor 35 from when being less than or equal to preset distance.Microprocessor 35 is according to second control signal
The first driving circuit 31 is controlled, so that laser projecting apparatus 10 is with the second frame per second parameter projection laser (shown in such as Fig. 5 (a)), wherein
Second frame per second parameter is less than the first frame per second parameter.It is appreciated that preset distance can be understood as the safe distance of human eye, work as human eye
When the distance between laser projecting apparatus 10 is greater than preset distance, as long as the diffraction optical element of laser projecting apparatus 10, collimation member
Situations such as part etc. is not ruptured, fallen off, laser projecting apparatus 10 can maintain frame per second parameter (i.e. the first frame per second ginseng when working normally
Number) projection laser.And when the distance between human eye and laser projecting apparatus 10 are less than or equal to preset distance, human eye and laser are thrown
The distance between emitter 10 is excessively close, and laser projecting apparatus 10 needs to reduce frame per second parameter, to ensure eye-safe.
Incorporated by reference to Fig. 6, in some embodiments, the parameter that laser projecting apparatus 10 projects laser includes width parameter.It answers
First control signal is sent extremely when being used for processor 33 and be greater than preset distance at a distance from human eye is between laser projecting apparatus 10
Microprocessor 35.Microprocessor 35 controls the first driving circuit 31 according to first control signal, so that laser projecting apparatus 10 is with the
One width parameter projects laser (shown in such as Fig. 6 (a)).Application processor 33 between human eye and the laser projecting apparatus 10 away from
Second control signal is sent to microprocessor 35 from when being less than or equal to preset distance.Microprocessor 35 is according to second control signal
The first driving circuit 31 is controlled, so that laser projecting apparatus 10 is with the second width parameter projection laser (shown in such as Fig. 6 (a)), wherein
Second width parameter is less than the first width parameter.It is appreciated that preset distance can be understood as the safe distance of human eye, work as human eye
When the distance between laser projecting apparatus 10 is greater than preset distance, as long as the diffraction optical element of laser projecting apparatus 10, collimation member
Situations such as part etc. is not ruptured, fallen off, laser projecting apparatus 10 can maintain width parameter (i.e. the first pulsewidth ginseng when working normally
Number) projection laser.And when the distance between human eye and laser projecting apparatus 10 are less than or equal to preset distance, human eye and laser are thrown
The distance between emitter 10 is excessively close, and laser projecting apparatus 10 needs to reduce width parameter, to ensure eye-safe.
Fig. 2 and Fig. 7 are please referred to, the laser projecting apparatus 10 of embodiment of the present invention is connect with the first driving circuit 31, laser
The control method of the projector 10 includes:
10: range sensor 36 detects the distance between human eye and laser projecting apparatus 10；
20: application processor 33 is according to the corresponding control signal of the distance between human eye and laser projecting apparatus 10 transmission to micro-
Processor 35；With
30: microprocessor 35 controls the first driving circuit 31 so that laser projecting apparatus 10 is with predefined parameter according to control signal
Project laser.
The control method of embodiment of the present invention controls laser projection according to the distance between human eye and laser projecting apparatus 10
Device 10 projects the parameter of laser, when specifically smaller at a distance from human eye is between laser projecting apparatus 10, reduces laser projecting apparatus
Current parameters, frame per second parameter and the width parameter of 10 projection laser, to prevent from generating harm to the eyes of user.Control method
Implementation detail can refer to the above-mentioned specific descriptions to terminal 100, details are not described herein.
Fig. 3 and Fig. 8 are please referred to, above-mentioned steps 10 can be replaced step 11, step 12 and step 13, in other words, laser
The control method of the projector 10 can include:
11: the first driving circuits 31 drive laser projecting apparatus 10 to project laser to target object；
12: infrared camera 20 is received by the modulated laser pattern of target object；
13: microprocessor 35 handles laser pattern to obtain the distance between human eye and laser projecting apparatus 10；
20: application processor 33 is according to the corresponding control signal of the distance between human eye and laser projecting apparatus 10 transmission to micro-
Processor 35；With
30: microprocessor 35 controls the first driving circuit 31 so that laser projecting apparatus 10 is with predefined parameter according to control signal
Project laser.
Incorporated by reference to Fig. 9, in some embodiments, application processor 33 according between human eye and laser projecting apparatus 10 away from
From the step of sending corresponding control signal to microprocessor 35, (i.e. step 20) includes:
21: application processor 33 sends the first control when being greater than preset distance at a distance from human eye is between laser projecting apparatus 10
Signal processed is to microprocessor 35；With
22: application processor 33 is sent when being less than or equal to preset distance at a distance from human eye is between laser projecting apparatus 10
Second control signal is to microprocessor 35.
Incorporated by reference to Figure 10 and Figure 11, in some embodiments, parameter includes current parameters, and microprocessor 35 is according to control
Signal control the first driving circuit 31 so that laser projecting apparatus 10 with predefined parameter project laser the step of (i.e. step 30) includes:
31: microprocessor 35 controls the first driving circuit 31 according to first control signal, so that laser projecting apparatus 10 is with the
One current parameters project laser；With
32: microprocessor 35 controls the first driving circuit 31 according to second control signal, so that laser projecting apparatus 10 is with the
Two current parameters project laser, wherein the second current parameters are less than the first current parameters.
In some embodiments, parameter includes frame per second parameter, and microprocessor 35 is according to the first driving of control of control signal
Circuit 31 so that laser projecting apparatus 10 with predefined parameter project laser the step of (i.e. step 50) includes:
33: microprocessor 35 controls the first driving circuit 31 according to first control signal, so that laser projecting apparatus 10 is with the
One frame per second parameter projects laser；With
34: microprocessor 35 controls the first driving circuit 31 according to second control signal, so that laser projecting apparatus 10 is with the
Two frame per second parameters project laser, wherein the second frame per second parameter is less than the first frame per second parameter
In some embodiments, parameter includes width parameter, and microprocessor 35 is according to the first driving of control of control signal
Circuit 31 so that laser projecting apparatus 10 with predefined parameter project laser the step of (i.e. step 50) includes:
35: microprocessor 35 controls the first driving circuit 31 according to first control signal, so that laser projecting apparatus 10 is with the
One width parameter projects laser；With
36: microprocessor 35 controls the first driving circuit 31 according to second control signal, so that laser projecting apparatus 10 is with the
Two width parameters project laser, wherein the second width parameter is less than the first width parameter.
Figure 12 is please referred to, embodiment of the present invention also provides a kind of laser projection component 60, and laser projection component 60 includes
Laser projecting apparatus 10, the first driving circuit 31, the second driving circuit 32 and supervision timer 34.At this point, the first driving circuit 31,
Second driving circuit 32 and supervision timer 34 are desirably integrated on the board unit 11 of laser projecting apparatus 10.
Please refer to Figure 12, in some embodiments, laser projecting apparatus 10 include board unit 11, lens barrel 12, light source 13,
Collimating element 14, diffraction optical element (diffractive optical elements, DOE) 15 and protection cap 16.
Board unit 11 includes substrate 111 and circuit board 112.Circuit board 112 is arranged on substrate 111, and circuit board 112 is used
In the mainboard of connection light source 13 and terminal 100, circuit board 112 can be hardboard, soft board or Rigid Flex.As shown in figure 12
Embodiment in, through-hole 1121 is offered on circuit board 112, light source 13 is fixed on substrate 111 and is electrically connected with circuit board 112
It connects.Heat release hole 1111 can be offered on substrate 111, the heat that light source 13 or the work of circuit board 112 generate can be by heat release hole
1111 shed, and heat-conducting glue can also be filled in heat release hole 1111, to further increase the heat dissipation performance of board unit 11.
Lens barrel 12 is fixedly connected with board unit 11, and lens barrel 12 is formed with accommodating chamber 121, lens barrel 12 include roof 122 and
The peripheral wall 124 of the annular extended from roof 122, peripheral wall 124 are arranged on board unit 11, and roof 122 offers and accommodating chamber
The light hole 1212 of 121 connections.Peripheral wall 124 can be connect with circuit board 112 by viscose glue.
Protection cap 16 is arranged on roof 122.Protection cap 16 includes offering out baffle 162 and the self catcher of light through-hole 160
The annular sidewall 164 that plate 162 extends.
Light source 13 and collimating element 14 are arranged in accommodating chamber 121, and diffraction optical element 15 is mounted on lens barrel 12, quasi-
Straight element 14 is successively set in the luminous optical path of light source 13 with diffraction optical element 15.Collimating element 14 issues light source 13
Laser is collimated, and laser is then passed through diffraction optical element 15 after passing through collimating element 14 to form laser pattern.
Light source 13 can be vertical cavity surface emitting laser (Vertical Cavity Surface Emitting
Laser, VCSEL) or edge-emitting laser (edge-emitting laser, EEL), in embodiment as shown in figure 12,
Light source 13 is edge-emitting laser, and specifically, light source 13 can be distributed feedback laser (Distributed Feedback
Laser, DFB).Light source 13 is for emitting laser into accommodating chamber 121.Incorporated by reference to Figure 13, light source 13 is whole to be in the form of a column, light source 13
An end face far from board unit 11 forms light-emitting surface 131, and laser is issued from light-emitting surface 131, and light-emitting surface 131 is first towards collimation
Part 14.Light source 13 is fixed on board unit 11, and specifically, light source 13 can be bonded on board unit 11 by sealing 17,
Such as the opposite with light-emitting surface 131 of light source 13 is bonded on one side on board unit 11.Incorporated by reference to Figure 12 and Figure 14, light source 13
Side 132 can also be bonded on board unit 11, and sealing 17 wraps the side 132 of surrounding, can also only bond side 132
Some face and board unit 11 or bond certain several face and board unit 11.Sealing at this time 17 can be heat-conducting glue, will
The heat that the work of light source 13 generates is conducted into board unit 11.
Figure 12 is please referred to, diffraction optical element 15 is carried on roof 122 and is housed in protection cap 16.Diffraction optics member
The opposite two sides of part 15 are contradicted with protection cap 16 and roof 122 respectively, and baffle 162 includes the resistance surface close to light hole 1212
1622, diffraction optical element 15 and resistance surface 1622 contradict.
Specifically, diffraction optical element 15 includes opposite the diffraction plane of incidence 152 and diffraction exit facet 154.Diffraction optics
Element 15 is carried on roof 122, the surface (resistance surface of the close light hole 1212 of diffraction exit facet 154 and baffle 162
1622) it contradicts, the diffraction plane of incidence 152 and roof 122 contradict.Light hole 1212 is aligned with accommodating chamber 121, out light through-hole 160 with
Light hole 1212 is aligned.Roof 122, annular sidewall 164 and baffle 162 and diffraction optical element 15 contradict, to prevent diffraction
Optical element 15 falls off out of protection cap 16 along light direction.In some embodiments, protection cap 16 is pasted by glue
On roof 122.
The light source 13 of above-mentioned laser projecting apparatus 10 uses edge-emitting laser, and one side edge-emitting laser is compared with VCSEL
The temperature drift of array is smaller, on the other hand, since edge-emitting laser is single-point light emitting structure, is not necessarily to array of designs structure, production
Simply, the cost of light source of laser projecting apparatus 10 is lower.
The laser of distributed feedback laser obtains the gain of power by the feedback of optical grating construction when propagating.It mentions
The power of high distributed feedback laser is needed by increasing Injection Current and/or increasing the length of distributed feedback laser,
Since increase Injection Current can make the power consumption of distributed feedback laser increase and serious problem of generating heat occurs,
In order to guarantee that distributed feedback laser can work normally, needs to increase the length of distributed feedback laser, cause to be distributed
Feedback laser is generally in elongate strip structure.When the light-emitting surface 131 of edge-emitting laser is towards collimating element 14, edge emitting
Laser is placed in vertical, since edge-emitting laser is in elongate strip structure, edge-emitting laser be easy to appear fall, shift or
Shaking etc. is unexpected, therefore can be fixed edge-emitting laser by the way that sealing 17 is arranged, and prevents edge-emitting laser from falling
It falls, be displaced or shake etc. and is unexpected.
Figure 12 and Figure 15 are please referred to, in some embodiments, light source 13 can also be using fixation side as shown in figure 15
Formula is fixed on board unit 11.Specifically, laser projecting apparatus 10 includes multiple supporting blocks 18, and supporting block 18 can be fixed on base
On board group part 11, light source 13 can be directly installed on multiple supports during installation by the common ambient light source 13 of multiple supporting blocks 18
Between block 18.In one example, multiple supporting blocks 18 clamp light source 13 jointly, to further prevent light source 13 to shake.
In some embodiments, protection cap 16 can be omitted, and diffraction optical element 15 can be set in accommodating chamber at this time
In 121, the diffraction exit facet 154 of diffraction optical element 15 can offset with roof 122, after laser passes through diffraction optical element 15
It is pierced by light hole 1212 again.In this way, diffraction optical element 15 is not easily to fall off.
In some embodiments, substrate 111 can save, and light source 13 can be directly anchored on circuit board 112 to subtract
The integral thickness of small laser projecting apparatus 10.
In the description of this specification, reference term " certain embodiments ", " embodiment ", " some embodiment party
The description of formula ", " exemplary embodiment ", " example ", " specific example " or " some examples " means in conjunction with the embodiment
Or example particular features, structures, materials, or characteristics described are contained at least one embodiment or example of the invention.
In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, description
Particular features, structures, materials, or characteristics can be in any one or more embodiments or example with suitable side
Formula combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one described feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two,
Three, unless otherwise specifically defined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant, and the scope of the present invention is defined by the claims and their equivalents.
Claims (13)
1. a kind of control system of laser projecting apparatus, which is characterized in that the laser projecting apparatus can be projected to target object to swash
Light, the control system include:
Infrared camera, the infrared camera can be received by the modulated laser pattern of the target object；
First driving circuit, first driving circuit connect with the laser projecting apparatus and are used to drive the laser projecting apparatus
Project laser；
Microprocessor, the microprocessor connect with the infrared camera, the microprocessor and first driving circuit
It connects, the microprocessor is for handling the laser pattern to obtain the distance between human eye and the laser projecting apparatus；With
Application processor, the application processor are connect with the microprocessor, and the application processor is used for according to the people
Eye control signal corresponding with the transmission of the distance between the laser projecting apparatus to the microprocessor, the microprocessor according to
The control signal controls first driving circuit, so that the laser projecting apparatus projects laser with predefined parameter.
2. control system according to claim 1, which is characterized in that the parameter includes current parameters, frame per second parameter, arteries and veins
At least one of wide parameter.
3. control system according to claim 1, which is characterized in that the parameter includes current parameters；
The application processor is used to send when being greater than preset distance at a distance from the human eye is between the laser projecting apparatus
First control signal is to the microprocessor, and the microprocessor is according to first control signal control the first driving electricity
Road, so that the laser projecting apparatus projects laser with the first current parameters；
The application processor is used to be less than or equal at a distance from the human eye is between the laser projecting apparatus described predetermined
Apart from when send second control signal to the microprocessor, described in the microprocessor is controlled according to the second control signal
First driving circuit, so that the laser projecting apparatus projects laser with the second current parameters, wherein second current parameters are small
In first current parameters.
4. control system according to claim 1, which is characterized in that the parameter includes frame per second parameter；
The application processor is used to send when being greater than preset distance at a distance from the human eye is between the laser projecting apparatus
First control signal is to the microprocessor, and the microprocessor is according to first control signal control the first driving electricity
Road, so that the laser projecting apparatus projects laser with the first frame per second parameter；
The application processor is used to be less than or equal at a distance from the human eye is between the laser projecting apparatus described predetermined
Apart from when send second control signal to the microprocessor, described in the microprocessor is controlled according to the second control signal
First driving circuit, so that the laser projecting apparatus projects laser with the second frame per second parameter, wherein the second frame per second parameter is small
In the first frame per second parameter.
5. control system according to claim 1, which is characterized in that the parameter includes width parameter；
The application processor is used to send when being greater than preset distance at a distance from the human eye is between the laser projecting apparatus
First control signal is to the microprocessor, and the microprocessor is according to first control signal control the first driving electricity
Road, so that the laser projecting apparatus projects laser with the first width parameter；
The application processor is used to be less than or equal at a distance from the human eye is between the laser projecting apparatus described predetermined
Apart from when send second control signal to the microprocessor, described in the microprocessor is controlled according to the second control signal
First driving circuit, so that the laser projecting apparatus projects laser with the second width parameter, wherein second width parameter is small
In first width parameter.
6. control system according to claim 1, which is characterized in that the laser projecting apparatus is according to predetermined period to target
Object projects laser, periodically to obtain the distance between the human eye and the laser projecting apparatus.
7. control system according to claim 1, which is characterized in that the control system further include:
Second driving circuit, second driving circuit connect with first driving circuit and are used for the first driving electricity
Road power supply.
8. a kind of terminal, which is characterized in that the terminal includes:
Laser projecting apparatus；With
Control system described in claim 1 to 7 any one, first driving circuit are connect with the laser projecting apparatus.
9. a kind of control method of laser projecting apparatus, which is characterized in that the laser projecting apparatus is connect with the first driving circuit, institute
Stating control method includes:
First driving circuit drives the laser projecting apparatus to project laser to target object；
Infrared camera is received by the modulated laser pattern of the target object；
Laser pattern described in microprocessor processes is to obtain the distance between human eye and the laser projecting apparatus；
Application processor is according to the corresponding control signal of the distance between the human eye and laser projecting apparatus transmission to micro- place
Manage device；With
The microprocessor controls first driving circuit so that the laser projecting apparatus is with predetermined according to the control signal
Parameter projects laser.
10. control method according to claim 9, which is characterized in that the application processor is according to the human eye and institute
It states the distance between laser projecting apparatus and sends corresponding control signal to the step of microprocessor and include:
The application processor sends first when being greater than preset distance at a distance from the human eye is between the laser projecting apparatus
Signal is controlled to the microprocessor；With
The application processor is less than or equal to the preset distance at a distance from the human eye is between the laser projecting apparatus
When send second control signal to the microprocessor.
11. control method according to claim 10, which is characterized in that the parameter includes current parameters, micro- place
It manages device and first driving circuit is controlled so that the laser projecting apparatus projects laser with predefined parameter according to the control signal
The step of include:
The microprocessor controls first driving circuit according to the first control signal so that the laser projecting apparatus with
First current parameters project laser；With
The microprocessor controls first driving circuit according to the second control signal so that the laser projecting apparatus with
Second current parameters project laser, wherein second current parameters are less than first current parameters.
12. control method according to claim 10, which is characterized in that the parameter includes frame per second parameter, micro- place
It manages device and first driving circuit is controlled so that the laser projecting apparatus projects laser with predefined parameter according to the control signal
The step of include:
The microprocessor controls first driving circuit according to the first control signal so that the laser projecting apparatus with
First frame per second parameter projects laser；With
The microprocessor controls first driving circuit according to the second control signal so that the laser projecting apparatus with
Second frame per second parameter projects laser, wherein the second frame per second parameter is less than the first frame per second parameter.
13. control method according to claim 10, which is characterized in that the parameter includes width parameter, micro- place
It manages device and first driving circuit is controlled so that the laser projecting apparatus projects laser with predefined parameter according to the control signal
The step of include:
The microprocessor controls first driving circuit according to the first control signal so that the laser projecting apparatus with
First width parameter projects laser；With
The microprocessor controls first driving circuit according to the second control signal so that the laser projecting apparatus with
Second width parameter projects laser, wherein second width parameter is less than first width parameter.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810540382.5A CN109066288A (en) | 2018-05-30 | 2018-05-30 | Control system, the control method of terminal and laser projecting apparatus of laser projecting apparatus |
| PCT/CN2019/075392 WO2019227975A1 (en) | 2018-05-30 | 2019-02-18 | Control system of laser projector, terminal and control method of laser projector |
| US16/422,920 US11183811B2 (en) | 2018-05-30 | 2019-05-24 | Control system and method for laser projector, and terminal |
| EP19177196.3A EP3585054A3 (en) | 2018-05-30 | 2019-05-29 | Control system and control method for a laser projector |
| TW108118730A TWI708451B (en) | 2018-05-30 | 2019-05-30 | Control system for laser projector, terminal and control method for the laser projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810540382.5A CN109066288A (en) | 2018-05-30 | 2018-05-30 | Control system, the control method of terminal and laser projecting apparatus of laser projecting apparatus |
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| CN109066288A true CN109066288A (en) | 2018-12-21 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810540382.5A Pending CN109066288A (en) | 2018-05-30 | 2018-05-30 | Control system, the control method of terminal and laser projecting apparatus of laser projecting apparatus |
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| CN (1) | CN109066288A (en) |
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Application publication date: 20181221 |
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