CN108376251A - Control method, control device, terminal, computer equipment and storage medium - Google Patents
Control method, control device, terminal, computer equipment and storage medium Download PDFInfo
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- CN108376251A CN108376251A CN201810161936.0A CN201810161936A CN108376251A CN 108376251 A CN108376251 A CN 108376251A CN 201810161936 A CN201810161936 A CN 201810161936A CN 108376251 A CN108376251 A CN 108376251A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/166—Detection; Localisation; Normalisation using acquisition arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/80—Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/168—Feature extraction; Face representation
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- Computer Vision & Pattern Recognition (AREA)
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Abstract
The invention discloses a kind of control methods of laser projecting apparatus.The control method of laser projecting apparatus includes step：Obtain the projection distance of target user and laser projecting apparatus；Energy density when laser projecting apparatus is with parameter preset projection laser under current distance according to projection distance acquisition；Parameter preset is adjusted according to energy density and safe energy threshold and with the state modulator laser projecting apparatus after adjusting.The invention also discloses a kind of control device of laser projecting apparatus, terminal, computer readable storage medium and computer equipments.The control method of laser projecting apparatus disclosed by the invention, the control device of laser projecting apparatus, terminal, computer readable storage medium and computer equipment can be according to the projection distances and projection energy density of target user and laser projecting apparatus, the emission parameter for controlling laser projecting apparatus, avoids the projection energy density of laser projecting apparatus excessively high and harm users.
Description
Technical field
The present invention relates to image technology field, more particularly to a kind of control method, the control device of laser projecting apparatus, end
End, computer readable storage medium and computer equipment.
Background technology
Laser projecting apparatus can project the laser with predetermined pattern information, and by laser projection to the target being positioned in the space
On user, then the laser pattern that is reflected by target user obtained by imaging device, further to obtain the solid of target user
Image is easy to damage user however, the laser controlling of laser projecting apparatus projection is improper.
Invention content
The embodiment provides a kind of control method of laser projecting apparatus, the control device of laser projecting apparatus, ends
End, computer readable storage medium and computer equipment.
The present invention provides a kind of control methods of laser projecting apparatus, including step：
Obtain the projection distance of target user and the laser projecting apparatus；
When according to projection distance acquisition, the laser projecting apparatus is with parameter preset projection laser under current distance
Energy density；
The parameter preset is adjusted according to the energy density and safe energy threshold and with the state modulator institute after adjusting
State laser projecting apparatus.
The present invention provides a kind of control devices of laser projecting apparatus, including：
Acquisition module, the projection distance for obtaining target user and the laser projecting apparatus；
Computing module is projected for obtaining the laser under current distance according to the projection distance with parameter preset
Energy density when laser；
Control module, for the parameter preset is adjusted according to the energy density and safe energy threshold and with adjusting after
State modulator described in laser projecting apparatus.
The present invention provides a kind of terminal, including laser projecting apparatus, the terminal further includes：
Processor, the projection distance for obtaining target user and the laser projecting apparatus, and for according to the projection
Distance obtains the energy density when laser under current distance projects laser with parameter preset；With
Controller, for the parameter preset is adjusted according to the energy density and safe energy threshold and with adjusting after
Laser projecting apparatus described in state modulator.
The present invention provides the non-volatile computer readable storage mediums that one or more includes computer executable instructions
Matter, when the computer executable instructions are executed by one or more processors so that the processor perform claim requires 1
To the control method of the laser projecting apparatus described in any one of 8.
The present invention provides a kind of computer equipment, including memory and processor, calculating is stored in the memory
Machine readable instruction, when described instruction is executed by the processor so that the processor perform claim requires any one of 1 to 8
The control method of the laser projecting apparatus.
Control method, control device, terminal, computer equipment and the computer readable storage medium of embodiment of the present invention
The emission parameter of laser projecting apparatus can be controlled according to the projection distance and projection energy density of target user and laser projecting apparatus,
Avoid the projection energy density of laser projecting apparatus excessively high and harm users.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the flow diagram of the control method of the laser projecting apparatus of certain embodiments of the present invention；
Fig. 2 is the module diagram of the control device of the laser projecting apparatus of certain embodiments of the present invention；
Fig. 3 is the module diagram of the terminal of certain embodiments of the present invention；
Fig. 4 is the flow diagram of the control method of the laser projecting apparatus of certain embodiments of the present invention；
Fig. 5 is the module diagram of the control device of the laser projecting apparatus of certain embodiments of the present invention；
Fig. 6 is the flow diagram of the control method of the laser projecting apparatus of certain embodiments of the present invention；
Fig. 7 is the module diagram of the control device of the laser projecting apparatus of certain embodiments of the present invention；
Fig. 8 is the flow diagram of the control method of the laser projecting apparatus of certain embodiments of the present invention；
Fig. 9 is the module diagram of the control device of the laser projecting apparatus of certain embodiments of the present invention；
Figure 10 is the flow diagram of the control method of the laser projecting apparatus of certain embodiments of the present invention；
Figure 11 is the module diagram of the control device of the laser projecting apparatus of certain embodiments of the present invention；
Figure 12 is the module diagram of the computer equipment of certain embodiments of the present invention；
Figure 13 is the structural schematic diagram of the laser projecting apparatus of certain embodiments of the present invention；
Figure 14 to Figure 16 is the part-structure schematic diagram of the laser projecting apparatus of certain embodiments of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Also referring to Fig. 1 to Fig. 3, embodiment of the present invention provides a kind of control method of laser projecting apparatus.Laser is thrown
The control method of emitter includes step：
01：Obtain the projection distance of target user and laser projecting apparatus；
02：Energy when laser projecting apparatus is with parameter preset projection laser under current distance according to projection distance acquisition is close
Degree；
03：Parameter preset is adjusted according to energy density and safe energy threshold and with the state modulator laser projection after adjusting
Device.
Referring to Fig. 2, embodiment of the present invention also provides a kind of control device 10 of laser projecting apparatus 30.The present invention is implemented
The control method of the laser projecting apparatus of mode can be realized by the control device 10 of the laser projecting apparatus 30 of embodiment of the present invention.
Control device 10 includes acquisition module 11, computing module 12 and control module 13.Step 01 can be realized by acquisition module 11, be walked
Rapid 02 can be realized by computing module 12, and step 03 can be realized by control module 13.In other words, acquisition module 11 can be used for
Obtain the projection distance of target user and laser projecting apparatus 30.Computing module 12 can be used for according to projection distance obtain currently away from
Energy density when from lower laser projecting apparatus 30 with parameter preset projection laser.Control module 13 can be used for according to energy density with
Safe energy threshold adjusts parameter preset and with the state modulator laser projecting apparatus 30 after adjusting.
Referring to Fig. 3, embodiment of the present invention also provides a kind of terminal 100.Terminal 100 includes laser projecting apparatus 30, eventually
End 100 further includes processor 40 and controller 50.Step 01 and step 02 can be realized that step 03 can be by controlling by processor 40
Device 50 processed is realized.In other words, processor 40 can be used for obtaining the projection distance of target user and laser projecting apparatus 30, and be used for
Energy density when laser projecting apparatus is with parameter preset projection laser under current distance according to projection distance acquisition.Controller 50
It can be used for adjusting parameter preset with safe energy threshold according to energy density and with the state modulator laser projecting apparatus 30 after adjusting.
Specifically, in embodiments of the present invention, control device 10 can apply in computer equipment, and computer equipment can
To be mobile phone, tablet computer, laptop, Intelligent bracelet, smartwatch, intelligent helmet, intelligent glasses, game machine etc., sheet
The terminal 100 of invention embodiment can also be one kind in computer equipment.
The embodiment of the present invention is illustrated so that terminal 100 is mobile phone as an example, and terminal 100 includes image collecting device and laser
The projector 30.Laser projecting apparatus 30 is used to project laser pattern to target user, and image collecting device can be infrared camera,
Quantity can be one or more, for acquiring by the modulated laser pattern of target user, and further generate target user's
Depth image is for identification, dynamic capture etc., and wherein laser can be infrared light, the parameter preset of laser projecting apparatus 30
Include throwing power, projection frequency etc..It is to be appreciated that laser projecting apparatus 30 is projected with a certain parameter preset to target user
Laser pattern, the energy of the infrared light projected are decayed with propagation distance, and the radiation received by human body also gradually weakens.
Human body in other words human eye have can be received within the unit interval laser energy density threshold value, usually, when the throwing of laser
When penetrating excessive power or target user and the too small projection distance of laser projecting apparatus 30, the energy density received by human eye is big
In the threshold value, at this point, the laser that projects of laser projecting apparatus 30 may harm users, such as human eye of burning.Projection distance can be
The distance of light-emitting surface of the face of user apart from laser projecting apparatus 30.In one example, the incidence surface of image collecting device 20
It can be generally aligned in the same plane with the light-emitting surface of laser projecting apparatus 30.The energy density that the distance of laser projecting apparatus 30 is received with human eye
In inverse correlation.
The multiple sensors of terminal 100, example can be utilized by detecting mode of the target user at a distance from laser projecting apparatus 30
If proximity sensor, depth camera, preposition RGB cameras or laser projecting apparatus 30 and image collecting device cooperate,
This is not limited.The data acquisition target user for the related sensor or hardware that the processing of processor 40 receives and laser projecting apparatus
30 distance.
When a certain mode-presetted laser projecting apparatus 30 projects laser under predefined parameter, energy density that human eye is received
It is substantially stationary, in concrete operations, the correspondence of parameter preset-projection distance-energy density can be measured before manufacture, and
It is stored in the memory of terminal 100, after obtaining target user and the projection distance of laser projecting apparatus 30, inquires preset throwing
Energy when penetrating distance-energy density correspondence and project to obtain under current distance laser with parameter preset laser is close
Degree.
Controller 50 can be according to energy density and human eye can receive under current projection distance safe energy threshold tune
The parameter of laser projecting apparatus 30 is saved, and laser is projected according to the state modulator laser projecting apparatus 30 after adjusting.The wherein tune of parameter
Section can be that one or more of multiple parameters are adjusted, and not be limited herein.
Referring to Fig. 4, in some embodiments, control method further includes step：
04：Obtain the scene image of target scene；
05：Judge whether scene image has face；With
06：If so, carrying out step 01.
Referring to Fig. 5, in some embodiments, control device 10 further includes image collection module 14 and judgment module
15.Step 04 can be realized that step 05 can be realized that step 06 can be by obtaining by judgment module 15 by image collection module 14
Module 11 is realized.In other words, image collection module 14 is used to obtain the scene image of target scene, and judgment module 15 is for sentencing
Whether disconnected scene image has face, acquisition module 11 to be used for when there are face, obtains target user and laser projecting apparatus 30
Projection distance.
Referring to Fig. 3, in some embodiments, terminal 100 further includes image collecting device 20, for realizing step
04, processor 40 is for realizing step 05 and step 06.In other words, image collecting device 20 is used to obtain the field of target scene
Scape image, processor judge whether scene image has face and acquisition target user and laser projection when there are face for 40
The projection distance of device 30.
Image collecting device 20 can be visible image capturing head, such as can be the front camera of terminal 100.It can manage
Xie Di, laser projecting apparatus 30 are set to the front panel of terminal 100 and object-oriented user.Image collecting device 20 can obtain mesh
Mark the RGB image of scene；Image collecting device 20 can also be infrared pick-up head, to obtain the infrared image of target scene.
Certainly, the quantity of image collecting device 20 can be multiple, e.g. two visible image capturing heads or be that two infrared lights are taken the photograph
As head or simultaneously including visible image capturing head and infrared pick-up head.Parameter preset can be that image collecting device 20 acquires
Focal length when scene image, to ensure the field that by image collecting device 20 is acquired of the identical scene on identical projection distance
Element in scape it is equal in magnitude.
It is to be appreciated that if face is not present in target scene, human eye receive the probability of the injury caused by laser compared with
Low, there are when face, just need to control laser projecting apparatus 30 only in target scene.
Referring to Fig. 6, in some embodiments, step 01 includes step：
011：Obtain the facial image of the target user acquired with parameter preset；
012：Calculate the ratio shared by face in facial image；With
013：The projection distance of target user and laser projecting apparatus are calculated according to ratio.
Referring to Fig. 7, in some embodiments, acquisition module 11 includes acquiring unit 111, the first computing unit 112
With the second computing unit 113.Step 011 can be realized that step 012 can be real by the first computing unit 112 by acquiring unit 111
Existing, step 013 can be realized by the second computing unit 113.In other words, acquiring unit 111 is adopted for obtaining with parameter preset
The facial image of the target user of collection, the first computing unit 112 can be used for calculating the ratio in facial image shared by face, and second
Computing unit 113 can be used for calculating projection distance according to ratio.
Referring to Fig. 3, in some embodiments, processor 40 can be additionally used in implementation steps 011, step 012 and step
013.In other words, processor 40 can be used for obtaining the face figure for the target user that image collecting device 20 is acquired with parameter preset
Picture calculates the ratio shared by face in facial image, and calculates projection distance according to ratio.
Specifically, can first according to the characteristic point of face extraction and analysis divide human face region in facial image with
Background area, then the ratio of the number of pixels where calculating human face region and the number of pixels of facial image is to obtain ratio.
It is appreciated that when large percentage, illustrate the closer image collecting device 20 of target user, that is, closer laser projection mould
Group 30, projection distance is smaller, and laser projecting apparatus 30 needs to adjust projection parameter, human eye too strong to avoid the laser of projection at this time
The energy density of reception is excessive and the user that burns.Meanwhile when ratio is smaller, illustrate target user and 20 phase of image collecting device
Away from farther out, that is, it is apart from each other with laser projection module 30, projection distance is larger, and the energy density that human eye receives is smaller.
In one example, when including multiple faces in same person face image, then the maximum face of area in multiple faces is chosen
As human face region to calculate ratio, the region shared by other faces is as a part for background area.
Projection distance and ratio can be demarcated in advance, specifically, user be guided first to be clapped with scheduled projection distance
Facial image is taken the photograph, and calculates the corresponding calibration ratio of the facial image, stores pair of the preset projection distance and the ratio of calibration
It should be related to, in order to calculate projection distance according to actual ratio in subsequent use.For example, guiding user in projection distance
Facial image is shot when being 30 centimetres, and it is 45% that the corresponding calibration ratio of the facial image, which is calculated, and in practical measurement
In, when first ratio that is calculated is R, then have according to the property of similar trianglesWherein D is according to real
The actual projected distance that the ratio R that border measures is calculated.In this way, according to the ratio shared by face in facial image, it can be more objective
See the actual projected distance of ground reflection target user.
Referring to Fig. 8, in some embodiments, step 03 includes step：
031：When energy density is more than the safe energy threshold, the throwing power of the laser projecting apparatus is reduced.
Referring to Fig. 9, in some embodiments, control module 13 includes the first control unit 131.Step 031 can be with
It is realized by the first control unit 131.In other words, the first control unit 131 is used to be more than the safe energy in energy density
When threshold value, the throwing power of laser projecting apparatus 30 is reduced.
Referring to Fig. 3, in some embodiments, processor 40 is used to be more than the safe energy threshold in energy density
When, reduce the throwing power of laser projecting apparatus 30.
If in particular, it will be appreciated that under current distance, by inquiring preset correspondence, user is in laser projection
When the energy density that device 30 receives when projecting laser with parameter preset is more than secure threshold, throwing power is reduced.
Correspondence is prestored can be measured in manufacture and is stored in storage by the correspondence of projection distance and throwing power
In device, in the correspondence, throwing power corresponding with projection distance should can meet laser projecting apparatus 30 to mesh
The laser pattern for marking user's projection can be by image acquisition device, and after adjusting power, the energy received by human eye
Density is less than safe energy threshold.
In operation, the corresponding projection work(of the projection distance is inquired in the relation table from the projection distance to prestore with throwing power
Rate, and control laser projecting apparatus 30 and laser is projected with the corresponding throwing power, or preset conversion coefficient meter can be combined
Throwing power corresponding with the projection distance is calculated, such as conversion coefficient is K, projection distance D, then throwing power P can be P
=K × D.
Referring to Fig. 8, in some embodiments, step 03 includes step：
032：When energy density is more than safe energy threshold, the projection frequency of laser projecting apparatus is reduced.
Referring to Fig. 9, in some embodiments, control module 13 includes the second control unit 132.Step 032 can be with
It is realized by the second control unit 132.In other words, the second control unit 132 is used to be more than safe energy threshold in energy density
When, reduce the projection frequency of laser projecting apparatus 30.
Referring to Fig. 3, in some embodiments, processor 40 is used for when energy density is more than safe energy threshold,
Reduce the projection frequency of laser projecting apparatus 30.
If in particular, it will be appreciated that under current distance, by inquiring preset correspondence, user is in laser projection
When the energy density that device 30 receives when projecting laser with parameter preset is more than secure threshold, projection frequency is reduced.
Laser projecting apparatus 30 projects laser with pulse, and energy accumulating can be reduced by reducing projection frequency, to reduce human eye
The energy density of reception.
Referring to Fig. 8, analogously, in some embodiments, step 03 includes step：
033：When energy density is more than safe energy threshold, the projection laser pulse width of laser projecting apparatus is reduced.
Referring to Fig. 9, in some embodiments, control module 13 includes the second control unit 133.Step 033 can be with
It is realized by the second control unit 133.In other words, the second control unit 133 is used to be more than safe energy threshold in energy density
When, reduce the projection laser pulse width of laser projecting apparatus 30.
Referring to Fig. 3, in some embodiments, processor 40 is used for when energy density is more than safe energy threshold,
Reduce the projection laser pulse width of laser projecting apparatus 30.
If in particular, it will be appreciated that under current distance, by inquiring preset correspondence, user is in laser projection
When the energy density that device 30 receives when projecting laser with parameter preset is more than secure threshold, projection frequency is reduced.
Laser projecting apparatus 30 projects laser with pulse, and single projection energy can be reduced by reducing projection laser pulse width,
It is similar with throwing power is reduced, to reduce the energy density of human eye reception.
Referring to Fig. 10, in some embodiments, control method further includes step：
07：When projection distance is less than safety distance threshold, control laser projecting apparatus is closed.
1 is please referred to Fig.1, in some embodiments, control module 13 includes the 4th control unit 134.Step 034 can be with
It is realized by the 4th control unit 134.In other words, the 4th control unit 134 is used to be more than safety distance threshold in projection distance
When, control laser projecting apparatus 30 is closed.
Referring to Fig. 3, in some embodiments, processor 40 is used for when projection distance is less than safety distance threshold,
Laser projecting apparatus 30 is controlled to close.
Specifically, in certain distance ranges, even if laser projecting apparatus is projected with lowest power, what human eye was received
Energy density, at this time can temporary close laser projecting apparatus 30 still above secure threshold.When detect projection distance be more than safety
When threshold value, it is again turned on the work of laser projecting apparatus 30.
Embodiment of the present invention additionally provides a kind of computer readable storage medium.One or more can be held comprising computer
The non-volatile computer readable storage medium storing program for executing of row instruction, when computer executable instructions are executed by one or more processors
When so that processor executes the control method of the laser projecting apparatus 30 of any of the above-described embodiment.Such as execute step 01：It obtains
The projection distance of target user and laser projecting apparatus；Step 02：The laser projecting apparatus under current distance is obtained according to projection distance
Energy density when laser is projected with parameter preset；Step 03：Parameter preset is adjusted according to energy density and safe energy threshold
And with the state modulator laser projecting apparatus after adjusting.
Please refer to Fig.1 2, embodiment of the present invention additionally provides a kind of computer equipment 200.Computer equipment 200 includes
Memory 61 and processor 40 store computer-readable instruction in memory 61, when instruction is executed by processor 40, processor
40 execute the control method of the laser projecting apparatus 30 of any of the above-described embodiment, such as execute step 01：Obtain target user with
The projection distance of laser projecting apparatus；Step 02：According to projection distance obtain under current distance laser projecting apparatus with parameter preset
Project energy density when laser；Step 03：Adjust parameter preset according to energy density and safe energy threshold and with adjusting after
State modulator laser projecting apparatus.
Figure 12 is the internal module schematic diagram of the computer equipment 200 in one embodiment.As shown in figure 12, the computer
Equipment 200 includes the processor 40 connected by system bus 63, memory 61 (being, for example, non-volatile memory medium), memory
Reservoir 64, display screen 65 and input unit 66.Wherein, the memory 61 of computer equipment 200 is stored with operating system and calculating
Machine readable instruction.The computer-readable instruction can be executed by processor 40, to realize described in above-mentioned any one embodiment
The control method of laser projecting apparatus 30.The processor 40 can be used for providing calculating and control ability, support entire computer equipment
200 operation.The built-in storage 64 of computer equipment 200 provides environment for the computer-readable instruction operation in memory 61.
The display screen 65 of computer equipment 200 can be liquid crystal display or electric ink display screen etc., and input unit 66 can be
The touch layer covered on display screen 65 can also be button, trace ball or the Trackpad being arranged on 200 shell of computer equipment,
Can also be external keyboard, Trackpad or mouse etc..The computer equipment 200 can be mobile phone, tablet computer, notebook electricity
Brain, personal digital assistant or Wearable (such as Intelligent bracelet, smartwatch, intelligent helmet, intelligent glasses) etc..This field
Technical staff is appreciated that structure shown in Figure 12, only with the schematic diagram of the relevant part-structure of the present invention program, and
The restriction for the computer equipment 200 being applied thereon to the present invention program is not constituted, and specific computer equipment 200 can wrap
It includes than more or fewer components as shown in the figure, either combine certain components or is arranged with different components.
Please refer to Fig.1 3, in some embodiments, laser projecting apparatus 30 include board unit 31, lens barrel 32, light source 33,
Collimating element 34, diffraction optical element (diffractive optical elements, DOE) 35 and protection cap 36.Controller
50 control laser projecting apparatus 30 projection parameter when be by control laser projecting apparatus 30 light source 33 luminous parameters come reality
Existing.
Board unit 31 includes substrate 311 and circuit board 312.Circuit board 312 is arranged on substrate 311, and circuit board 312 is used
In the mainboard of connection light source 33 and terminal 100, circuit board 312 can be hardboard, soft board or Rigid Flex.As shown in figure 13
Embodiment in, through-hole 3121 is offered on circuit board 312, light source 33 is fixed on substrate 311 and is electrically connected with circuit board 312
It connects.Heat emission hole 3111 can be offered on substrate 311, the heat that light source 33 or the work of circuit board 312 generate can be by heat emission hole
3111 shed, and heat-conducting glue can also be filled in heat emission hole 3111, to further increase the heat dissipation performance of board unit 31.
Lens barrel 32 is fixedly connected with board unit 31, and lens barrel 32 is formed with host cavity 321, lens barrel 32 include roof 322 and
The peripheral wall 324 of the annular extended from roof 322, peripheral wall 324 are arranged on board unit 31, and roof 322 offers and host cavity
The light hole 3212 of 321 connections.Peripheral wall 324 can be connect with circuit board 312 by viscose glue.
Protection cap 36 is arranged on roof 322.Protection cap 36 includes offering baffle 362 and the self catcher of light extraction through-hole 360
The annular sidewall 364 that plate 362 extends.
Light source 33 is arranged at collimating element 34 in host cavity 321, and diffraction optical element 35 is mounted on lens barrel 32, accurate
Straight element 34 is successively set on diffraction optical element 35 in the luminous light path of light source 33.Collimating element 34 sends out light source 33
Laser is collimated, and laser is then passed through diffraction optical element 35 to form laser pattern after passing through collimating element 34.
Light source 33 can be vertical cavity surface emitting laser (Vertical Cavity Surface Emitting
Laser, VCSEL) or edge-emitting laser (edge-emitting laser, EEL), in as shown for example in fig.13,
Light source 33 is edge-emitting laser, and specifically, light source 33 can be distributed feedback laser (Distributed Feedback
Laser, DFB).Light source 33 into host cavity 312 for emitting laser.Incorporated by reference to Figure 14, light source 33 is whole to be in the form of a column, light source 33
An end face far from board unit 31 forms light-emitting surface 331, and laser is sent out from light-emitting surface 331, and light-emitting surface 331 is first towards collimation
Part 34.Light source 33 is fixed on board unit 31, and specifically, light source 33 can be bonded in by sealing 37 on board unit 31,
Such as the opposite with light-emitting surface 331 of light source 33 is bonded on one side on board unit 31.Incorporated by reference to Figure 13 and Figure 15, light source 33
Side 332 can also be bonded on board unit 31, and sealing 37 wraps the side 332 of surrounding, can also only bond side 332
Some face and board unit 31 or bond certain several face and board unit 31.Sealing at this time 37 can be heat-conducting glue, will
The heat that the work of light source 33 generates is conducted into board unit 31.
3 are please referred to Fig.1, diffraction optical element 35 is carried on roof 322 and is housed in protection cap 36.Diffraction optics member
The opposite both sides of part 35 are contradicted with protection cap 36 and roof 322 respectively, and baffle 362 includes the resistance surface close to light hole 3212
3622, diffraction optical element 35 is contradicted with resistance surface 3622.
Specifically, diffraction optical element 35 includes opposite the diffraction plane of incidence 352 and diffraction exit facet 354.Diffraction optics
Element 35 is carried on roof 322, the surface (resistance surface of diffraction exit facet 354 and the close light hole 3212 of baffle 362
3622) it contradicts, the diffraction plane of incidence 352 is contradicted with roof 362.Light hole 3212 is aligned with host cavity 321, light extraction through-hole 360 with
Light hole 3212 is aligned.Roof 322, annular sidewall 364 and baffle 362 are contradicted with diffraction optical element 35, to prevent diffraction
Optical element 35 falls off along light direction out of protection cap 36.In some embodiments, protection cap 36 is pasted onto by glue
On roof 362.
The light source 33 of above-mentioned laser projecting apparatus 30 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, makes
Simply, the cost of light source of laser projecting apparatus 30 is relatively low.
The laser of distributed feedback laser obtains the gain of power by the feedback of optical grating construction when propagating.It carries
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 ensure that distributed feedback laser can work normally, the length for increasing distributed feedback laser is needed, causes to be distributed
Feedback laser is generally in elongate strip structure.When the light-emitting surface 331 of edge-emitting laser is towards collimating element 34, edge emitting
Laser is placed in vertical, since edge-emitting laser is in elongate strip structure, edge-emitting laser be susceptible to fall, shift or
Shaking etc. is unexpected, therefore can be fixed edge-emitting laser by the way that sealing 37 is arranged, and prevents edge-emitting laser from falling
Fall, displacement or shaking etc. it is unexpected.
3 and Figure 15 are please referred to Fig.1, in some embodiments, light source 33 can also use fixation side as shown in figure 16
Formula is fixed on board unit 31.Specifically, laser projecting apparatus 30 includes multiple supporting blocks 38, and supporting block 38 can be fixed on base
On board group part 31, light source 33 can be directly installed on multiple supports by 38 common ambient light source 33 of multiple supporting blocks when mounted
Between block 38.In one example, light source 33 is clamped in multiple supporting blocks 38 jointly, to further prevent light source 33 to shake.
In some embodiments, protection cap 36 can be omitted, and diffraction optical element 35 can be arranged in host cavity at this time
In 321, the diffraction exit facet 354 of diffraction optical element 35 can offset with roof 322, after laser passes through diffraction optical element 35
It is pierced by light hole 3212 again.In this way, diffraction optical element 35 is not easily to fall off.
In some embodiments, substrate 311 can save, and light source 33 can be directly anchored on circuit board 312 to subtract
The integral thickness of small laser projecting apparatus 30.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in that a non-volatile computer is readable to be deposited
In storage media, the program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, the storage medium
Can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM) etc..
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the application the scope of the claims therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the guarantor of the application
Protect range.Therefore, the protection domain of the application patent should be determined by the appended claims.
Claims (17)
1. a kind of control method of laser projecting apparatus, which is characterized in that including step：
Obtain the projection distance of target user and the laser projecting apparatus；
The energy when laser projecting apparatus is with parameter preset projection laser under current distance according to projection distance acquisition
Density；
The parameter preset is adjusted according to the energy density and safe energy threshold and to swash described in the state modulator after adjusting
Light projector.
2. the control method of laser projecting apparatus according to claim 1, which is characterized in that the control of the laser projecting apparatus
Method further includes step：
Obtain the scene image of target scene；
Judge whether the scene image has face；With
If so, obtaining the projection distance of target user and the laser projecting apparatus.
3. the control method of laser projecting apparatus according to claim 2, which is characterized in that the acquisition target user and institute
The step of projection distance for stating laser projecting apparatus includes：
Obtain the facial image of the target user acquired with parameter preset；
Calculate the ratio shared by face in the facial image；With
The projection distance of the target user and the laser projecting apparatus are calculated according to the ratio.
4. the control method of laser projecting apparatus according to claim 1, which is characterized in that according to the energy density and peace
Full energy threshold adjusts the parameter preset and to include the step of laser projecting apparatus described in the state modulator after adjusting：
When energy density is more than the safe energy threshold, the throwing power of the laser projecting apparatus is reduced.
5. the control method of laser projecting apparatus according to claim 1, which is characterized in that according to the energy density and peace
Full energy threshold adjusts the parameter preset and to include the step of laser projecting apparatus described in the state modulator after adjusting：
When energy density is more than the safe energy threshold, the projection frequency of the laser projecting apparatus is reduced.
6. the control method of laser projecting apparatus according to claim 1, which is characterized in that according to the energy density and peace
Full energy threshold adjusts the parameter preset and to include the step of laser projecting apparatus described in the state modulator after adjusting：
When energy density is more than the safe energy threshold, the projection laser pulse width of the laser projecting apparatus is reduced.
7. the control method of laser projecting apparatus according to claim 1, which is characterized in that the control method further includes step
Suddenly：
When the projection distance is less than safety distance threshold, controls the laser projecting apparatus and close.
8. a kind of control device of laser projecting apparatus, which is characterized in that including：
Acquisition module, the projection distance for obtaining target user and the laser projecting apparatus；
Computing module is projected for obtaining the laser projecting apparatus under current distance according to the projection distance with parameter preset
Energy density when laser；
Control module, for adjusting the parameter preset and according to the energy density and safe energy threshold with the ginseng after adjusting
Number controls the laser projecting apparatus.
9. a kind of terminal, including laser projecting apparatus, which is characterized in that the terminal further includes：
Processor, the projection distance for obtaining target user and the laser projecting apparatus, and for according to the projection distance
Obtain the energy density when laser projecting apparatus under current distance projects laser with parameter preset；With
Controller, for adjusting the parameter preset and according to the energy density and safe energy threshold with the parameter after adjusting
Control the laser projecting apparatus.
10. terminal according to claim 9, which is characterized in that the terminal further includes image collecting device, for obtaining
The scene image of target scene, the processor is for judging whether the scene image has face and obtained when there are face
The projection distance of target user and the laser projecting apparatus.
11. terminal according to claim 10, which is characterized in that the processor is used for：
Obtain the facial image of the target user acquired with parameter preset by image collecting device；
Calculate the ratio shared by face in the facial image；With
The projection distance of the target user and the laser projecting apparatus are calculated according to the ratio.
12. terminal according to claim 9, which is characterized in that the processor is used for：
When energy density is more than the safe energy threshold, the throwing power of the laser projecting apparatus is reduced.
13. terminal according to claim 9, which is characterized in that the processor is used for：
When energy density is more than the safe energy threshold, the projection frequency of the laser projecting apparatus is reduced.
14. terminal according to claim 9, which is characterized in that the processor is used for：
When energy density is more than the safe energy threshold, the projection laser pulse width of the laser projecting apparatus is reduced.
15. terminal according to claim 9, which is characterized in that the processor is used for：
When the projection distance is less than safety distance threshold, controls the laser projecting apparatus and close.
16. one or more includes the non-volatile computer readable storage medium storing program for executing of computer executable instructions, when the calculating
When machine executable instruction is executed by one or more processors so that the processor perform claim requires any one of 1 to 7 institute
The control method for the laser projecting apparatus stated.
17. a kind of computer equipment, including memory and processor, computer-readable instruction is stored in the memory, institute
Instruction is stated when being executed by the processor so that the laser projection described in any one of described processor perform claim requirement 1 to 7
The control method of device.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161936.0A CN108376251B (en) | 2018-02-27 | 2018-02-27 | Control method, control device, terminal, computer device, and storage medium |
| EP19736567.9A EP3564748A4 (en) | 2018-02-27 | 2019-02-26 | Control method, control apparatus, terminal, computer device, and storage medium |
| PCT/CN2019/076157 WO2019165956A1 (en) | 2018-02-27 | 2019-02-26 | Control method, control apparatus, terminal, computer device, and storage medium |
| US16/423,073 US11335028B2 (en) | 2018-02-27 | 2019-05-27 | Control method based on facial image, related control device, terminal and computer device |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201810161936.0A CN108376251B (en) | 2018-02-27 | 2018-02-27 | Control method, control device, terminal, computer device, and storage medium |
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| CN108376251A true CN108376251A (en) | 2018-08-07 |
| CN108376251B CN108376251B (en) | 2020-04-17 |
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| CN201810161936.0A Expired - Fee Related CN108376251B (en) | 2018-02-27 | 2018-02-27 | Control method, control device, terminal, computer device, and storage medium |
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| WO2019165956A1 (en) * | 2018-02-27 | 2019-09-06 | Oppo广东移动通信有限公司 | Control method, control apparatus, terminal, computer device, and storage medium |
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