CN108375864A

CN108375864A - The laser projection module and its detection method of rupture, depth camera and electronic device

Info

Publication number: CN108375864A
Application number: CN201810164313.9A
Authority: CN
Inventors: 白剑
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-02-27
Filing date: 2018-02-27
Publication date: 2018-08-07

Abstract

The invention discloses a kind of laser projection module and its detection method, depth camera and the electronic devices of rupture.Laser projection module includes laser emitter, collimating element, diffraction optical element and processor.It is formed with transparency conducting film on collimating element and/or diffraction optical element.Transparency conducting film is equipped with conductive electrode.Conductive electrode is used to export electric signal after being powered.Processor is for obtaining electric signal, judging whether electric signal determines collimating element and/or diffraction optical element rupture in preset range and when electric signal is not in preset range.The laser projection module of embodiment of the present invention on collimating element and diffraction optical element by being arranged transparency conducting film and conductive electrode, judge whether collimating element and/or diffraction optical element rupture further according to the electric signal of conductive electrode output, so, the laser of laser projection module projection can be not turned on or closed in time when detecting rupture, and harm is generated to avoid to the eyes of user.

Description

The laser projection module and its detection method of rupture, depth camera and electronic device

Technical field

The present invention relates to technical field of imaging, more particularly to a kind of laser projection module, laser projection module rupture inspection Survey method, depth camera and electronic device.

Background technology

Some existing laser emitters (such as vertical cavity laser emitter VCSEL etc.) can launch focus signal compared with Strong laser, these laser energy after collimating element, diffraction optical element can decay, so as to meet signal strength less than pair The injury thresholding of human body.These laser emitters are usually made of glass or other components being easily broken, and are dropped once encountering Situations such as, camera lens rupture, then laser will be emitted directly, irradiates the body or eyes of user, serious safety is caused to ask Topic.

Invention content

The embodiment provides detection method, depth that a kind of laser projection module, laser projection module rupture Camera and electronic device.

The present invention provides a kind of laser projection module, the laser projection module include laser emitter, collimating element, Diffraction optical element and processor.The laser emitter is for emitting laser.The collimating element is for collimating the laser. The diffraction optical element is used for laser of the diffraction after collimating element collimation to form laser pattern, the collimating element And/or transparency conducting film is formed on the diffraction optical element, the transparency conducting film is equipped with conductive electrode, the conduction Electrode is used to export electric signal after being powered.The processor is for obtaining the electric signal, judging whether the electric signal is in The collimating element is determined in preset range and when the electric signal is not in the preset range and/or described is spread out Penetrate optical element rupture.

The present invention provides a kind of detection method of laser projection module rupture, the laser projection module includes laser hair Emitter, collimating element and diffraction optical element, the laser emitter is for emitting laser, and the collimating element is for collimating institute State laser, the diffraction optical element for laser of the diffraction after collimating element collimation to form laser pattern, it is described Transparency conducting film is formed on collimating element and/or the diffraction optical element, the transparency conducting film is equipped with conductive electrode, The conductive electrode is used to export electric signal after being powered；The detection method includes：

Obtain the electric signal exported after the conductive electrode is powered；

Judge the electric signal whether in preset range；With

The collimating element and/or diffraction optics member are determined when the electric signal is not in the preset range Part ruptures.

The present invention provides a kind of depth cameras.The depth camera includes above-mentioned laser projection module, Image Acquisition And processor.Described image collector is for acquiring the laser pattern projected from the laser projection module into object space. The processor is for handling the laser pattern to obtain depth image.

The present invention provides a kind of electronic devices.Electronic device includes shell and above-mentioned depth camera, the depth phase Machine setting is exposed to obtain the depth image on the housing and from the shell.

The laser projection module of embodiment of the present invention, detection method, depth camera and the electricity of the rupture of laser projection module Sub-device is by being arranged transparency conducting film and conductive electrode on collimating element, and/or light transmission being arranged on diffraction optical element Conductive film and conductive electrode judge collimating element further according to the electric signal that conductive electrode, and/or conductive electrode export and/or spread out Penetrate whether optical element ruptures.In this way, can detect that whether laser projection module is intact, and detecting that laser projection module is broken When splitting, it may be selected to be not turned on laser projection module or close the laser of laser projection module projection in time or reduce laser The luminous power for projecting module, after being ruptured to avoid laser projection module, the energy mistake for the laser that laser projection module projects Height leads to the problem of the eyes of user and endangers, and promotes the safety that user uses.

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 detection method of the laser projection module rupture of certain embodiments of the present invention.

Fig. 2 is the structural schematic diagram of the laser projection module of certain embodiments of the present invention.

Fig. 3 and Fig. 4 is the sectional view of the diffraction optical element of certain embodiments of the present invention.

Fig. 5 to Fig. 8 is the conspectus of the conductive electrode of the diffraction optical element of certain embodiments of the present invention.

Fig. 9 to Figure 12 is the conspectus of the conductive electrode of the diffraction optical element of certain embodiments of the present invention.

Figure 13 is the structural schematic diagram of the diffraction optical element of certain embodiments of the present invention.

Figure 14 is the conspectus of the conductive electrode of the diffraction optical element of certain embodiments of the present invention.

Figure 15 is the structural schematic diagram of the diffraction optical element of certain embodiments of the present invention.

Figure 16 and Figure 17 is the structural schematic diagram of the collimating element of certain embodiments of the present invention.

Figure 18 to Figure 21 is the conspectus of the conductive electrode of the collimating element of certain embodiments of the present invention.

Figure 22 to Figure 25 is the conspectus of the conductive electrode of the collimating element of certain embodiments of the present invention.

Figure 26 is the structural schematic diagram of the collimating element of certain embodiments of the present invention.

Figure 27 is the conspectus of the conductive electrode of the collimating element of certain embodiments of the present invention.

Figure 28 is the structural schematic diagram of the collimating element of certain embodiments of the present invention.

Figure 29 is the flow diagram of the detection method of the laser projection module rupture of certain embodiments of the present invention.

Figure 30 is the structural schematic diagram of the laser projection module of certain embodiments of the present invention.

Figure 31 to Figure 33 is the part-structure schematic diagram of the laser projection module of certain embodiments of the present invention.

Figure 34 is the structural schematic diagram of the depth camera of certain embodiments of the present invention.

Figure 35 is the structural schematic diagram of the electronic device 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.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can Can also be to be electrically connected or can be in communication with each other to be mechanical connection；It can be directly connected, it can also be by between intermediary It connects connected, can be the interaction relationship of the connection or two elements inside two elements.For the ordinary skill of this field For personnel, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

Also referring to Fig. 1 and Fig. 2, the present invention provides a kind of detection method that laser projection module 100 ruptures.Laser is thrown It includes laser emitter 10, collimating element 20, diffraction optical element 30 and processor 40 to penetrate module 100.Laser emitter 10 is used In transmitting laser.Collimating element 20 is used for the laser that collimation laser transmitter 10 emits.Diffraction optical element 30 is passed through for diffraction Laser after the collimation of collimating element 20 is to form laser pattern.Wherein, it is formed on collimating element 20 and/or diffraction optical element 30 There is transparency conducting film 21/31 (Fig. 3 and Figure 16 shown in), wherein can only be formed with transparency conducting film 21 on collimating element 20 (shown in Figure 16)；Alternatively, transparency conducting film 31 (as shown in Figure 3) is only formed on diffraction optical element 30, alternatively, collimating element It is formed with transparency conducting film 21 on 20, while being formed with transparency conducting film 31 on diffraction optical element 30.21 on transparency conducting film Be equipped with conductive electrode 22 (shown in Figure 16), transparency conducting film 31 be equipped with conductive electrode 32 (shown in Fig. 3), conductive electrode 22 and Exportable electric signal after conductive electrode 32 is powered.

Laser projection module 100 rupture detection method include：

02：Obtain the electric signal exported after conductive electrode 22, and/or the energization of conductive electrode 32；

04：Judge electric signal whether in preset range；With

06：Determine that collimating element 20 and/or diffraction optical element 30 are ruptured when electric signal is not in preset range.

The present invention also provides a kind of laser projection modules 100.Step 02, step 04 and step 06 can be by laser projections Processor 40 in module 100 executes.In other words, processor 40 can be used for obtaining conductive electrode 22, and/or conductive electrode 32 The electric signal that is exported after energization judges whether electric signal is not in preset range and in electric signal in preset range When determine that collimating element 20 and/or diffraction optical element 30 rupture.

Specifically, it is formed with transparency conducting film 21 on collimating element 20, when collimating element 20 is in serviceable condition, light transmission The resistance of conductive film 21 is smaller, and the conductive electrode 22 given in this case on transparency conducting film 21 is powered, that is, applies a certain size Voltage, then the electric current that processor 40 is got at this time conductive electrode 22 exports is larger.And when collimating element 20 ruptures, shape At the transparency conducting film 21 on collimating element 20 also can fragmentation, the resistance of the transparency conducting film 21 at fragmentation position at this time Approach infinity gives the conductive electrode 22 on transparency conducting film 21 to be powered in this case, the conduction electricity that processor 40 is got The electric current that pole 22 exports is smaller.Therefore, first way：Shape can not be ruptured according to electric signal (i.e. electric current) and collimating element 20 Difference size judges whether transparency conducting film 21 ruptures between the electric signal (i.e. electric current) detected under state, further, can Judge whether collimating element 20 ruptures according to the state of transparency conducting film 21, that is, if transparency conducting film 21 ruptures, show standard Straight element 20 also ruptures；If transparency conducting film 21 does not rupture, show that collimating element 20 does not also rupture.The second way：It can root The electric signal exported after being powered according to conductive electrode 22 on collimating element 20 directly judges whether collimating element 20 ruptures, specifically, When collimating element 20 does not rupture, electric signal that conductive electrode 22 exports not within a preset range when determine that transparency conducting film 21 is broken It splits, and then judges that collimating element 20 also ruptures；If conductive electrode 22 export electric signal within a preset range when determine that light transmission Conductive film 21 does not rupture, and then judges that collimating element 20 does not also rupture.

Similarly, it is also formed with transparency conducting film 31 on diffraction optical element 30, when diffraction optical element 30 is in intact When state, the resistance of transparency conducting film 31 is smaller, and the conductive electrode 32 given in this case on transparency conducting film 31 is powered, that is, applies Add a certain size voltage, then the electric current that the conductive electrode 32 that processor 40 is got at this time exports is larger.And work as diffraction optics When element 30 ruptures, be formed in transparency conducting film 31 on diffraction optical element 30 also can fragmentation, it is saturating at fragmentation position at this time The resistance approach infinity of light guide electrolemma 31 gives the conductive electrode 32 on transparency conducting film 31 to be powered, place in this case The electric current that the conductive electrode 32 that reason device 40 is got exports is smaller.Therefore, first way：It can be according to electric signal (i.e. electric current) Judge light transmitting electro-conductive with difference size between the electric signal (i.e. electric current) that is detected under 30 non-state of rupture of diffraction optical element Whether film 31 ruptures, and further, can sentence whether diffraction optical element 30 ruptures according to the state of transparency conducting film 31, that is, If transparency conducting film 31 ruptures, show that diffraction optical element 30 also ruptures；If transparency conducting film 31 does not rupture, show diffraction Optical element 30 does not also rupture.The second way：The electricity exported after being powered according to conductive electrode 32 on diffraction optical element 30 Signal directly judges whether diffraction optical element 30 ruptures, and specifically, when diffraction optical element 30 does not rupture, conductive electrode 32 is defeated The electric signal gone out not within a preset range when determine that transparency conducting film 31 ruptures, and then judge that diffraction optical element 30 is also broken It splits；If conductive electrode 32 export electric signal within a preset range when determine that transparency conducting film 31 does not rupture, and then judge spread out Optical element 30 is penetrated also not rupture.

When being formed with transparency conducting film 21 on collimating element 20, while transparency conducting film is formed on diffraction optical element 30 When 31, processor 40 can distinguish transparency conducting film 21 and transparency conducting film 31, be collimating element 20 thus, it is possible to tell Rupture or be diffraction optical element 30 rupture or be that collimating element 20 is ruptured with diffraction optical element 30.

In addition, transparency conducting film 21 can be formed in the surface of collimating element 20, transparency conducting film by modes such as plating 31 can also be formed in the surface of diffraction optical element 30 by modes such as plating.Transparency conducting film 21, transparency conducting film 31 Material can be any one in tin indium oxide (Indium tin oxide, ITO), silver nanowire, metal silver wire.Indium oxide Tin, silver nanowire, metal silver wire all have good light transmittance and electric conductivity, it can be achieved that be powered after electric signal output, together The generation of the light extraction light path of Shi Buhui collimations element 20 and diffraction optical element 30 is blocked.

Embodiment of the present invention laser projection module 100 and laser projection module 100 rupture detection method by Transparency conducting film 21 and conductive electrode 22 are set on collimating element 20, and/or light transmitting electro-conductive is set on diffraction optical element 30 Film 31 and conductive electrode 32, the electric signal exported further according to conductive electrode 22, and/or conductive electrode 32 judge collimating element 20 And/or whether diffraction optical element 30 ruptures.In this way, can detect that whether laser projection module 100 is intact, and it is sharp detecting When light projection module 100 ruptures, it may be selected to be not turned on laser projection module 100 or close laser projection module 100 in time to throw The luminous power of the laser or reduction laser projection module 100 penetrated, after being ruptured to avoid laser projection module 100, laser is thrown The energy for penetrating the laser that module 100 projects is excessively high, leads to the problem of and endangers to the eyes of user, promotes the safety that user uses Property.

Also referring to Fig. 3 and Fig. 4, in some embodiments, diffraction optical element 30 includes that opposite diffraction is incident Face 301 and diffraction exit facet 302.When being formed with transparency conducting film 31 on diffraction optical element 30, transparency conducting film 31 is single Layer, transparency conducting film 31 can be arranged on the diffraction plane of incidence 301 (as shown in Figure 3), can also be arranged in diffraction exit facet 302 Upper (as shown in Figure 4).Due to the diffraction plane of incidence 301 of diffraction optical element 30 be it is rough, by transparency conducting film 31 manufacture crafts that are arranged on diffraction exit facet 302 are relatively simple.In addition, the diffraction plane of incidence 301 of diffraction optical element 30 For diffraction grating, diffraction grating may cause the laser energy of outgoing too strong and endanger the eyes of user when rupturing, but there is also The relatively low situation of the laser energy of outgoing, and due to the rupture of diffraction grating, the laser pattern of 30 diffraction of diffraction optical element is It changes, laser projection module 100 can not normal use at this time.Therefore, transparency conducting film 31 can be also arranged in diffraction On the plane of incidence 301, transparency conducting film 31 is made to be in direct contact diffraction grating, to promote the standard of 30 Safety check-up of diffraction optical element True property.

Further, also referring to Fig. 5 to Fig. 8, transparency conducting film 31 is single layer, is arranged in diffraction optical element 30 On the diffraction plane of incidence 301 or diffraction exit facet 302.The conductive electrode 32 being arranged on transparency conducting film 31 is single, conductive electrode 32 include diffraction input terminal 321 and diffraction output end 322, and diffraction input terminal 321 and diffraction output end 322 are connect with processor 40 And form galvanic circle.Wherein, there are many arrangement modes of conductive electrode 32：For example, diffraction input terminal 321 and diffraction output end 322 line direction (being the extending direction of conductive electrode 32) is the length direction (as shown in Figure 5) of transparency conducting film 31, or The line direction of person's diffraction input terminal 321 and diffraction output end 322 is the width direction (as shown in Figure 6) of transparency conducting film 31, Or the line direction of diffraction input terminal 321 and diffraction output end 322 be transparency conducting film 31 diagonal (such as Fig. 7 and Shown in Fig. 8).No matter the arrangement mode of conductive electrode 32 is above-mentioned which kind of mode, and conductive electrode 32 can cross over entire light transmission Conductive film 31 can relatively accurately detect whether transparency conducting film 31 ruptures.

Alternatively, also referring to Fig. 9 to Figure 12, transparency conducting film 31 is single layer, and spreading out in diffraction optical element 30 is arranged It penetrates on the plane of incidence 301 or diffraction exit facet 302.The conductive electrode 32 being arranged on transparency conducting film 31 is a plurality of, a plurality of conductive electricity Pole 32 is mutually disjointed, and every conductive electrode 32 includes diffraction input terminal 321 and diffraction output end 322.Each diffraction input terminal 321 And each diffraction output end 322 is connect with processor 40 to form a galvanic circle, the diffraction of a plurality of conductive electrode 32 as a result, Input terminal 321 and diffraction output end 322 are connect respectively with processor 40 to form a plurality of galvanic circle.Wherein, a plurality of conductive electricity There are many arrangement modes of pole 32：For example, the line direction of each diffraction input terminal 321 and each diffraction output end 322 (is The extending direction of conductive electrode 32) be transparency conducting film 31 length direction, a plurality of conductive electrode 32 is along transparency conducting film 31 (as shown in Figure 9) is arranged in length direction parallel interval；Alternatively, the company of each diffraction input terminal 321 and each diffraction output end 322 Line direction is the width direction of transparency conducting film 31, width direction parallel interval of a plurality of conductive electrode 32 along transparency conducting film 31 It is arranged (as shown in Figure 10)；Alternatively, the line direction of each diffraction input terminal 321 and each diffraction output end 322 is led for light transmission The diagonal of electrolemma 31, a plurality of conductive electrode 32 (are such as schemed along the diagonal parallel interval setting of transparency conducting film 31 Shown in 11 and Figure 12).No matter the arrangement mode of conductive electrode 32 is above-mentioned which kind of form, compared to setting single conductive electrode For 32, a plurality of conductive electrode 32 can occupy the more area of transparency conducting film 31, can correspondingly export more electricity Signal.When since single conductive electrode 32 is only arranged, it is possible to which the position and single ruptured there are diffraction optical element 30 is conductive The position of electrode 32 is separated by very far, and is influenced less on single conductive electrode 32, the electric signal of the single conductive electrode 32 output Still within a preset range the case where, accuracy in detection be not high.And in present embodiment, a plurality of conductive electrode 32 occupies light transmitting electro-conductive The more area of film 31, can correspondingly export more electric signals, and processor 40 can be more smart according to more electric signal Really judge whether transparency conducting film 31 ruptures, further judge whether diffraction optical element 30 ruptures, promotes diffraction optics The accuracy of 30 Safety check-up of element.

Alternatively, also referring to Figure 13 and Figure 14, transparency conducting film 31 is the bridging structure of single layer, is arranged in diffraction optics In 301 (not shown) of the diffraction plane of incidence or diffraction exit facet 302 (as shown in figure 13) of element 30.Specifically, conductive electrode 32 Including a plurality of first diffraction conductive electrode 323 disposed in parallel, a plurality of second diffraction conductive electrode 324 disposed in parallel and a plurality of Bridge formation diffraction conductive electrode 325.A plurality of first diffraction conductive electrode 323 and a plurality of second diffraction conductive electrode 324 are crisscross, Every first diffraction conductive electrode 323 is continuous uninterrupted, and every the second diffraction conductive electrode 324 is with corresponding a plurality of the The staggered place of one diffraction conductive electrode 323 disconnects and is not turned on a plurality of first diffraction conductive electrode 323.Every bridge formation diffraction is led The gap of corresponding second diffraction conductive electrode 324 is connected electrode 325.Bridge formation diffraction conductive electrode 325 spreads out with first The intervening portion for penetrating conductive electrode 323 is equipped with diffraction insulator 326.The both ends of every first diffraction conductive electrode 323 and processing Device 40 is connected to form a galvanic circle, and the both ends of every second diffraction conductive electrode 324 are connect with processor 40 to be formed One galvanic circle, as a result, the both ends of a plurality of first diffraction conductive electrode 323 respectively connect with processor 40 a plurality of to be formed The both ends of galvanic circle, a plurality of second diffraction conductive electrode 324 are respectively connect with processor 40 to form a plurality of galvanic circle. Wherein, the material of diffraction insulator 326 can be the organic material with good translucency and insulating properties, diffraction insulator 326 The modes such as silk-screen or yellow light processing procedure can be used to be made.Transparency conducting film 31 herein can be a plurality of, a plurality of transparency conducting film 31 constitute single layer, and corresponding with conductive electrode 32 respectively, and transparency conducting film 31 is a plurality of, 31 parallel interval of a plurality of transparency conducting film Setting, conductive electrode 32 form the first diffraction conductive electrode 323 and the second diffraction are conductive through being arranged in transparency conducting film 31 Electrode 324.A plurality of first diffraction conductive electrode 323 and a plurality of second diffraction conductive electrode 324 be crisscross to refer to a plurality of the One diffraction conductive electrode 323 is mutually perpendicular to interlock with a plurality of second diffraction conductive electrode 324, i.e. the first diffraction conductive electrode 323 Angle with the second diffraction conductive electrode 324 is 90 degree.Certainly, in other embodiments, a plurality of first diffraction conductive electrode 323 with a plurality of second diffraction conductive electrode 324 is crisscross can also be a plurality of first diffraction conductive electrode 323 and a plurality of second Diffraction conductive electrode 324 is mutually inclined staggeredly.In use, processor 40 can be simultaneously to a plurality of first diffraction conductive electrode 323 It is powered to obtain multiple electric signals, alternatively, processor 40 can spread out to a plurality of first successively with a plurality of second diffraction conductive electrode 324 Conductive electrode 323 and a plurality of second diffraction conductive electrode 324 is penetrated to be powered to obtain multiple electric signals, then, the root again of processor 40 Judge whether transparency conducting film 31 ruptures according to electric signal.Incorporated by reference to Figure 13, when detecting that number is that the first diffraction 1. is conductive The electric signal that electrode 323 exports not within a preset range, number be the electric signal of the second diffraction conductive electrode 324 output 3. not When within a preset range, illustrate transparency conducting film 31 number be the first diffraction conductive electrode 323 1. with number be 3. the Two diffraction conductive electrodes, 324 staggered place ruptures, then the position corresponding with 31 rupture location of transparency conducting film of diffraction optical element 30 Also it ruptures.In this way, diffraction optical element 30 can be more precisely detected by the transparency conducting film 31 of the single layer of bridging structure The specific location for whether rupturing and rupturing.

Also referring to Figure 14 and Figure 15, in some embodiments, diffraction optical element 30 enters including opposite diffraction Penetrate face 301 and diffraction exit facet 302.When being formed with transparency conducting film 31 on diffraction optical element 30, transparency conducting film 31 includes The first diffraction conductive film 311 being arranged on the diffraction plane of incidence 301 and the second diffraction being arranged on diffraction exit facet 302 are conductive Film 312.A plurality of first diffraction conductive electrode 323 disposed in parallel is provided on first diffraction conductive film 311, the second diffraction is conductive A plurality of second diffraction conductive electrode 324 disposed in parallel is provided on film 312.First diffraction conductive electrode 323 is emitted in diffraction Projection and the second diffraction conductive electrode 324 on face 302 is crisscross, the both ends and place of every first diffraction conductive electrode 323 The connection of device 40 is managed to form a galvanic circle, the both ends of every second diffraction conductive electrode 324 are connect with processor 40 with shape At a galvanic circle, the both ends of a plurality of first diffraction conductive electrode 323 are respectively connect more to be formed with processor 40 as a result, Galvanic circle, the both ends of a plurality of second diffraction conductive electrode 324 are respectively connect with processor 40 to form a plurality of conductive return Road.Wherein, projection of the first diffraction conductive electrode 323 on diffraction exit facet 302 is handed in length and breadth with the second diffraction conductive electrode 324 Mistake refers to that a plurality of first diffraction conductive electrode 323 is spatially mutually perpendicular to interlock with a plurality of second diffraction conductive electrode 324, That is projection and the angle of second diffraction conductive electrode 324 of the first diffraction conductive electrode 323 on diffraction exit facet 302 are 90 Degree.Certainly, in other embodiments, projection of a plurality of first diffraction conductive electrode 323 on diffraction exit facet 302 with it is a plurality of Second diffraction conductive electrode 324 is crisscross to can also be that a plurality of first diffraction conductive electrode 323 is conductive with a plurality of second diffraction Electrode 324 is spatially mutually inclined staggeredly.In use, processor 40 can be simultaneously to a plurality of first diffraction conductive electrode 323 It is powered to obtain multiple electric signals, alternatively, processor 40 can spread out to a plurality of first successively with a plurality of second diffraction conductive electrode 324 Conductive electrode 323 and a plurality of second diffraction conductive electrode 324 is penetrated to be powered to obtain multiple electric signals, then, the root again of processor 40 Judge whether transparency conducting film 31 ruptures according to electric signal, further judges whether diffraction optical element 30 ruptures.Ibid, according to A plurality of first diffraction conductive electrode 323 and the electric signal of a plurality of second diffraction conductive electrode 324 output can accurately detect and spread out Penetrate the specific location whether optical element 30 ruptures and rupture.

Also referring to Figure 16 and Figure 17, in some embodiments, collimating element 20 includes opposite collimated incident face 201 and collimation exit facet 202.When being formed with transparency conducting film 21 on collimating element 20, transparency conducting film 21 is single layer, light transmission Conductive film 21 can be arranged on collimated incident face 201 (as shown in figure 16), can also be arranged on collimation exit facet 202 (such as Shown in Figure 17).

Further, also referring to Figure 18 to Figure 21, transparency conducting film 21 is single layer, and the standard in collimating element 20 is arranged On the straight plane of incidence 201 or collimation exit facet 202.The conductive electrode 22 being arranged on transparency conducting film 21 is single, conductive electrode 22 Including collimation input terminal 221 and collimation output end 222, collimates input terminal 221 and collimation output end 222 is connect simultaneously with processor 40 Form galvanic circle.Wherein, there are many arrangement modes of conductive electrode 22：For example, collimation input terminal 221 and collimation output end 222 line direction (being the extending direction of conductive electrode 22) is the length direction (as shown in figure 18) of transparency conducting film 21, Or collimation input terminal 221 and collimate output end 222 line direction for transparency conducting film 21 width direction (such as Figure 19 institutes Show), or the diagonal that the line direction of collimation input terminal 221 and collimation output end 222 is transparency conducting film 21 is (as schemed Shown in 20 and Figure 21).No matter the arrangement mode of conductive electrode 22 is above-mentioned which kind of mode, and conductive electrode 22 can be crossed over entire Transparency conducting film 21 can relatively accurately detect whether transparency conducting film 21 ruptures.

Alternatively, also referring to Figure 22 to Figure 25, transparency conducting film 21 is single layer, and the collimation being arranged in collimating element 20 enters It penetrates on face 201 or collimation exit facet 202.The conductive electrode 22 being arranged on transparency conducting film 21 is a plurality of, a plurality of conductive electrode 22 It mutually disjoints, every conductive electrode 22 includes collimation input terminal 221 and collimation output end 222.Each collimation input terminal 221 and every A collimation output end 222 is connect with processor 40 to form a galvanic circle, as a result, the collimation input of a plurality of conductive electrode 22 End 221 and collimation output end 222 are connect respectively with processor 40 to form a plurality of galvanic circle.Wherein, a plurality of conductive electrode 22 Arrangement mode there are many：For example, each the line direction of collimation input terminal 221 and each collimation output end 222 (is conduction The extending direction of electrode 22) be transparency conducting film 21 length direction, length of a plurality of conductive electrode 22 along transparency conducting film 21 Direction parallel interval setting (as shown in figure 22)；Alternatively, each collimation input terminal 221 and each line of collimation output end 222 Direction is the width direction of transparency conducting film 21, and a plurality of conductive electrode 22 is set along the width direction parallel interval of transparency conducting film 21 It sets (as shown in figure 23)；Alternatively, each the line direction of collimation input terminal 221 and each collimation output end 222 is light transmitting electro-conductive (such as Figure 24 is arranged along the diagonal parallel interval of transparency conducting film 21 in the diagonal of film 21, a plurality of conductive electrode 22 Shown in Figure 25).No matter the arrangement mode of conductive electrode 22 is above-mentioned that mode, compared to setting single conductive electrode 22 For, a plurality of conductive electrode 22 can occupy the more area of transparency conducting film 21, can correspondingly export more electric signals. When since single conductive electrode 22 is only arranged, it is possible to which there are the positions of position and single conductive electrode 22 that collimating element 20 ruptures It sets and is separated by very far, and single conductive electrode 22 is influenced less, the electric signal of the single conductive electrode 22 output is still in default model Interior situation is enclosed, accuracy in detection is not high.And in present embodiment, it is more that a plurality of conductive electrode 22 occupies transparency conducting film 21 Area, can correspondingly export more electric signals, and processor 40 can more precisely judge thoroughly according to more electric signal Whether light guide electrolemma 21 ruptures, and further judges whether collimating element 20 ruptures, and promotes the standard of 20 Safety check-up of collimating element True property.

Alternatively, also referring to Figure 26 and Figure 27, transparency conducting film 21 is the bridging structure of single layer, is arranged in collimating element In 20 201 (not shown) of collimated incident face or collimation exit facet 202 (as shown in figure 26).Specifically, conductive electrode 22 includes A plurality of first collimation conductive electrode 223, a plurality of second collimation conductive electrode 224 disposed in parallel and a plurality of bridge formation disposed in parallel Collimate conductive electrode 225.A plurality of first collimation conductive electrode 223 and a plurality of second collimation conductive electrode 224 are crisscross, every First collimation conductive electrode 223 is continuous uninterrupted, and every second collimation conductive electrode 224 is accurate with corresponding a plurality of first The staggered place of straight conductive electrode 223 disconnects and is not turned on a plurality of first collimation conductive electrode 223.Every conductive electricity of collimation of building bridge The gap that pole 225 collimates conductive electrode 224 by corresponding second is connected.Collimation conductive electrode 225 of building bridge is led with the first collimation The intervening portion of electrode 223 is equipped with collimation insulator 226.Every first both ends for collimating conductive electrode 223 and processor 40 To form a galvanic circle, the connection of both ends processor 40 of every second collimation conductive electrode 224 is led with forming one for connection Electrical circuit, the both ends of a plurality of first collimation conductive electrode 223 are respectively connect with processor 40 as a result, is returned with forming a plurality of conduction The both ends on road, a plurality of second collimation conductive electrode 224 respectively 40 are connect to form a plurality of galvanic circle with processor.Wherein, The material for collimating insulator 226 can be the organic material with good translucency and insulating properties, and collimation insulator 226 can be used The modes such as silk-screen or yellow light processing procedure are made.Transparency conducting film 21 herein can be a plurality of, and a plurality of transparency conducting film 21 is constituted Single layer, and it is corresponding with conductive electrode 22 respectively, transparency conducting film 21 is a plurality of, 21 parallel interval of a plurality of transparency conducting film setting, Conductive electrode 22 forms the first collimation conductive electrode 223 and second and collimates conductive electrode through being arranged in transparency conducting film 224.A plurality of first collimation conductive electrode 223 collimates that conductive electrode 224 is crisscross to refer to that a plurality of first is accurate with a plurality of second Straight conductive electrode 223 collimates conductive electrode 224 with a plurality of second and is mutually perpendicular to interlock, i.e., first collimates conductive electrode 223 and the The angle of two collimation conductive electrodes 224 is 90 degree.Certainly, in other embodiments, it is a plurality of first collimation conductive electrode 223 with A plurality of second collimation conductive electrode 224 is crisscross to can also be that a plurality of first collimation conductive electrode 223 is collimated with a plurality of second Conductive electrode 224 is mutually inclined staggeredly.In use, processor 40 can be simultaneously to a plurality of first collimation conductive electrode 223 and more Item second collimates conductive electrode 224 and is powered to obtain multiple electric signals, alternatively, processor 40 can successively lead a plurality of first collimation Electrode 223 and a plurality of second collimation conductive electrode 224 are powered to obtain multiple electric signals, and then, processor 40 is further according to electricity Signal judges whether transparency conducting film 21 ruptures.Incorporated by reference to Figure 26, when detecting that number is the first collimation conductive electrode 1. Not within a preset range, number is the electric signal of the second collimation output of conductive electrode 224 3. not pre- to the electric signal of 223 outputs If when in range, illustrating that transparency conducting film 21 is the first collimation conductive electrode 223 1. in number and number is 3. second accurate Straight 224 staggered place of conductive electrode rupture, then the position corresponding with 21 rupture location of transparency conducting film of collimating element 20 also ruptures.Such as This, can more precisely detect whether collimating element 20 ruptures and rupture by the transparency conducting film of the single layer of bridging structure Specific location.

Also referring to Figure 27 and Figure 28, in some embodiments, collimating element 20 includes opposite collimated incident face 201 and collimation exit facet 202.When being formed with transparency conducting film 21 on collimation optics, transparency conducting film 21 includes that setting exists First on collimated incident face 201 the second collimation conductive film 212 for collimating conductive film 211 and being arranged on collimation exit facet 202. A plurality of first collimation conductive electrode 223 disposed in parallel, the second collimation conductive film 212 are provided on first collimation conductive film 211 On be provided with it is a plurality of it is disposed in parallel second collimation conductive electrode 224.First collimation conductive electrode 223 is in collimation exit facet 202 On projection and the second collimation conductive electrode 224 it is crisscross, both ends and the processor 40 of every first collimation conductive electrode 223 To form a galvanic circle, the both ends of every second collimation conductive electrode 224 are connect with processor 40 to form one for connection Galvanic circle, as a result, it is a plurality of first collimation conductive electrode 223 both ends respectively connect with processor 40 to form a plurality of conduction The both ends in circuit, a plurality of second collimation conductive electrode 224 are respectively connect with processor 40 to form a plurality of circuit.Wherein, One collimation conductive electrode 223 collimation exit facet 202 on projection with second collimation conductive electrode 224 it is crisscross refer to it is more Item first collimates conductive electrode 223 and is spatially mutually perpendicular to interlock with a plurality of second collimation conductive electrode 224, i.e., the first collimation Projection of the conductive electrode 223 on collimation exit facet 202 and the angle of the second collimation conductive electrode 224 are 90 degree.Certainly, at it In his embodiment, projection of a plurality of first collimation conductive electrode 223 on collimation exit facet 202 and a plurality of second collimation are conductive Electrode 224 is crisscross to can also be that a plurality of first collimation conductive electrode 223 collimates conductive electrode 224 in space with a plurality of second On be mutually inclined staggeredly.In use, processor 40 can be simultaneously to a plurality of first collimation conductive electrode 223 and a plurality of second collimation Conductive electrode 224 is powered to obtain multiple electric signals, alternatively, processor 40 can be successively to a plurality of first collimation conductive electrode 223 It is powered with a plurality of second collimation conductive electrode 224 to obtain multiple electric signals, then, processor 40 judges further according to electric signal Whether transparency conducting film 21 ruptures, and further judges whether collimating element 20 ruptures.Ibid, conductive according to a plurality of first collimation The electric signal that electrode 223 and a plurality of second collimation conductive electrode 224 export can accurately detect whether collimating element 20 ruptures And the specific location of rupture.

In some embodiments, step 02 obtains the telecommunications exported after conductive electrode 22, and/or the energization of conductive electrode 32 Number the step of carried out before laser projection module 100 is opened.Specifically, before each laser projection module 100 is opened, processing Device 40 can be sequentially or simultaneously to the conductive electrode 32 on diffraction optical element 30 and the conductive electrode 22 on collimating element 20 It is powered, and obtains the electric signal that conductive electrode 22 and conductive electrode 32 export, judge diffraction optics member further according to electric signal Whether part 30 and collimating element 20 rupture.Any one rupture in detecting diffraction optical element 30 and collimating element 20 When, it is not turned on laser projection module 100, to avoid the energy of the laser of the projection of laser projection module 100 excessively high, harm is used The problem of family eyes.

Figure 29 is please referred to, in some embodiments, the detection of the rupture of laser projection module 100 of embodiment of the present invention Method further includes：

011：Detect the movement velocity of laser projection module 100；With

012：Judge whether movement velocity is more than predetermined speed, is more than in the movement velocity of laser projection module 100 predetermined When speed, the step of executing the electric signal for obtaining and being exported after conductive electrode 22, and/or conductive electrode 32 are powered.

Referring again to Fig. 2, in some embodiments, step 011 and step 012 can be realized by processor 40. I other words processor 40 can be additionally used in the movement velocity for detecting laser projection module 100, it is predetermined to judge whether movement velocity is more than Speed, and when the movement velocity of laser projection module 100 is more than predetermined speed, executes and obtain conductive electrode 22, and/or lead The step of electric signal that electrode 32 exports after being powered.

The movement velocity of velocity sensor detection laser projection module 100 wherein may be used, velocity sensor can fill Can also be to be installed along with electronic device 3000 with laser projection module 100 in laser projection module 100 (shown in Figure 35) In, the movement speed of laser projection module 100 further can be obtained in the movement velocity of velocity sensor detection electronic installation 3000 Degree.When the movement velocity of laser projection module 100 is larger, show that laser projection module 100 is likely to occur the feelings dropped at this time Condition, at this point, processor 40 sequentially or simultaneously on diffraction optical element 30 conductive electrode 32 and collimating element 20 on lead Electrode 22 is powered, and obtains the electric signal that conductive electrode 22 and conductive electrode 32 export, and spreads out further according to electric signal judgement It penetrates optical element 30 and whether collimating element 20 ruptures.It is any one in detecting diffraction optical element 30 and collimating element 20 When person ruptures, determine that laser projection module 100 ruptures.In this way, without each time use laser projection module 100 when into The detection that row laser projection module 100 ruptures, can reduce the power consumption of laser projection module 100.

Referring again to Fig. 2, in some embodiments, the laser projection module 100 of embodiment of the present invention further includes mirror Cartridge module 50 and board unit 60, barrel assembly 50 are arranged on board unit 60 and collectively constitute host cavity with board unit 60 54.Board unit 60 includes substrate 61 and the circuit board 62 being carried on substrate 61.Barrel assembly 50 includes lens barrel 51 and protection Cover 52.Lens barrel 51 includes that roof 511 and the peripheral wall 512 of the annular extended from roof 511, peripheral wall 512 are arranged in board unit 60 On, roof 511 offers the light hole 513 being connected to host cavity 54.Protective cover 52 is arranged on roof 511.Protective cover 52 wraps The annular sidewall 522 for including the baffle 521 for offering light extraction through-hole 523 and extending from baffle 521.Diffraction optical element 30 is carried on On roof 511 and it is housed in protective cover 52.The opposite both sides of diffraction optical element 30 are supported with protective cover 52 and roof 511 respectively It touches, baffle 521 includes the resistance surface 53 close to light hole 513, and diffraction optical element 30 is contradicted with resistance surface 53.

Specifically, diffraction optical element 30 includes opposite the diffraction plane of incidence 301 and diffraction exit facet 302.Diffraction optics Element 30 is carried on roof 511, and diffraction exit facet 302 and the surface (resistance surface 53) of the close light hole 513 of baffle 521 are supported It touches, the diffraction plane of incidence 301 is contradicted with roof 511.Light hole 513 is aligned with host cavity 54, light extraction through-hole 523 and light hole 513 Alignment.Roof 511, side wall 522 and baffle 521 and diffraction optical element 30 contradict, to prevent diffraction optical element 30 along going out Light direction falls off out of protective cover 52.In some embodiments, protective cover 52 is pasted onto by glue 70 on roof 511.

Please continue to refer to Fig. 2, in some embodiments, collimating element 20 includes optical section 26 and is set around optical section 26 The mounting portion 25 set, collimating element 20 include the collimated incident face 201 and collimation exit facet positioned at 20 opposite both sides of collimating element 202, optical section 26 includes two curved surfaces for being located at 20 opposite both sides of collimating element, and mounting portion 25 is contradicted with roof 511, optical section One of 26 curved surfaces stretch into light hole 513.

When assembling above-mentioned laser projection module 100, along light path from the bottom end of the peripheral wall 512 of barrel assembly 50 successively It is put into collimating element 20 into host cavity 54 and installs the board unit 60 of laser emitter 10.Laser emitter 10 can be with First be mounted on board unit 60, then will be equipped with again the board unit 60 of laser emitter 10 together with 50 knot of barrel assembly It closes.Diffraction optical element 30 is carried on roof 511 against the direction of light path, protective cover 52 is then mounted on roof 511 On, to make diffraction optical element 30 be housed in protective cover 52.In this way, laser projection module 100 is installed simply.In other realities It applies in mode, first diffraction optical element 30 can also be reversed and be arranged in protective cover 52, then again by diffraction optical element 30 And protective cover 52 is installed along on roof 511.At this point, the diffraction exit facet 302 of diffraction optical element 30 is supported with resistance surface 53 It touches, the diffraction plane of incidence 301 is with the conflict of roof 511 and opposite with the collimation exit facet 202 of optical section 26, and the collimation of optical section 26 enters It is opposite with laser emitter 10 to penetrate face 201.In this way, the installation of laser projection module 100 is simpler.

In some embodiments, laser emitter 10 can be vertical cavity surface emitting laser (Vertical Cavity Surface Emitting Laser, VCSEL) or edge-emitting laser (edge-emitting laser, EEL).Wherein, Edge-emitting laser can be distributed feedback laser (Distributed Feedback Laser, DFB).

Incorporated by reference to Figure 30, when laser emitter 10 is edge-emitting laser, laser emitter 10 is whole to be in the form of a column, laser An end face of the transmitter 10 far from board unit 60 forms light-emitting surface 11, and laser is sent out from light-emitting surface 11, and light-emitting surface direction is accurate Straight element 20.Laser emitter 10 is fixed on board unit 60.Specifically, incorporated by reference to Figure 31, laser emitter 10 can lead to It crosses sealing 15 to be bonded on board unit 60, such as the opposite with light-emitting surface 11 of laser emitter 10 is bonded in substrate in batch on one side On part 60.Incorporated by reference to Figure 32, the joint face 12 of laser emitter 10 can also be bonded on board unit 60, and sealing 15 wraps The joint face 12 of surrounding.At this point, sealing 15 can be heat-conducting glue.Base is caused with the heat conduction for generating the work of laser emitter 10 On board group part 60.When laser projection module 100 is using edge-emitting laser, one side edge-emitting laser is compared with VCSEL array Temperature drift 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, swash The cost of the light source of light projection module 100 is relatively low.

The laser of distributed feedback laser obtains the gain of power by the feedback of optical grating construction, to carry when propagating The power of high distributed feedback laser is needed by increasing Injection Current and/or increasing the length of distributed feedback laser, Since the pouring-in electric current of increase can make the power consumption of distributed feedback laser increase and serious problem of generating heat occurs, because This needs the length for increasing distributed feedback laser, causes point to ensure that distributed feedback laser can work normally Cloth feedback laser is generally in elongate strip result.When the light-emitting surface 11 of edge-emitting laser is towards collimating element 20, Bian Fa It penetrates laser to place in vertical, due to the elongate strip structure of edge-emitting laser, edge-emitting laser, which is susceptible to, to be fallen, shifts Or shaking etc. is unexpected.

Incorporated by reference to Figure 30 and Figure 33, laser emitter 10 can also be fixed on substrate using fixed form as shown in figure 33 On component 60.Specifically, laser projection module 100 includes the support element 16 of multiple elasticity, and support element 16 can be fixed on substrate On component 60, multiple support elements 16 surround receiving space 160 jointly, and laser emitter 10 is housed in receiving space 160 and quilt Multiple support elements 16 support, and laser emitter 10 can be directly installed between multiple support elements 16 when mounted.One In a example, laser emitter 10 is clamped to further prevent laser emitter 10 to shake in multiple support elements 16 jointly.

In some embodiments, substrate 61 can also save, and laser emitter 10 can be directly anchored to circuit board 62 On to reduce the thickness of laser projection module 100.

Figure 34 is please referred to, the present invention also provides a kind of depth cameras 1000.The depth camera 1000 of embodiment of the present invention Including laser projection module 100, image acquisition device 200 and the processor 40 described in above-mentioned any one embodiment.Wherein, scheme As collector 200 is for acquiring the laser pattern projected into object space after 30 diffraction of diffraction optical element.Processor 40 It is connect respectively with laser projection module 100 and image acquisition device 200.Processor 40 is for handling laser pattern to obtain depth map Picture.Processor 40 herein can be the processor 40 in laser projection module 100.

Specifically, laser projection module 100 projects laser pattern into object space by projecting window 801, and image is adopted Storage 200 is acquired by acquisition window 802 by the modulated laser pattern of target object.Image acquisition device 200 can be infrared phase Machine, processor 40 calculate each picture corresponding with reference pattern of each pixel in the laser pattern using image matching algorithm The deviation value of vegetarian refreshments further obtains the depth image of the laser pattern further according to deviation value.Wherein, image matching algorithm can be Digital picture correlation (Digital Image Correlation, DIC) algorithm.It is of course also possible to use other images match are calculated Method replaces DIC algorithms.

Laser projection module 100 in the depth camera 1000 of embodiment of the present invention and by being set on collimating element 20 It sets transparency conducting film 21 and conductive electrode 22, and/or transparency conducting film 31 and conductive electrode is set on diffraction optical element 30 32, judge collimating element 20 and/or diffraction optics member further according to the electric signal that conductive electrode 22, and/or conductive electrode 32 export Whether part 30 ruptures.In this way, can detect that whether laser projection module 100 is intact, and detecting that laser projection module 100 is broken When splitting, it may be selected to be not turned on laser projection module 100 or close the laser of 100 projection of laser projection module in time or subtract The luminous power of small laser projection module 100, after being ruptured to avoid laser projection module 100, laser projection module 100 projects Laser energy it is excessively high, the eyes of user are led to the problem of and are endangered, the safety that uses of user is promoted.

Figure 35 is please referred to, the electronic device 3000 of embodiment of the present invention includes the depth of shell 2000 and the above embodiment Spend camera 1000.The setting of depth camera 1000 exposes in shell 2000 and from shell 2000 to obtain depth image.

Laser projection module 100 in the electronic device 3000 of embodiment of the present invention on collimating element 20 by being arranged Transparency conducting film 21 and conductive electrode 22, and/or setting transparency conducting film 31 and conductive electrode 32 on diffraction optical element 30, The electric signal exported further according to conductive electrode 22, and/or conductive electrode 32 judges collimating element 20 and/or diffraction optical element 30 Whether rupture.In this way, can detect that whether laser projection module 100 is intact, and detecting the rupture of laser projection module 100 When, it may be selected to be not turned on laser projection module 100 or close laser or the reduction of 100 projection of laser projection module in time The luminous power of laser projection module 100, after being ruptured to avoid laser projection module 100, what laser projection module 100 projected The energy of laser is excessively high, leads to the problem of and endangers to the eyes of user, promotes the safety that user uses.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.

In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply 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 this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.

Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable Sequence, include according to involved function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention Embodiment person of ordinary skill in the field understood.

Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (system of such as computer based system including processor or other can be held from instruction The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicating, propagating or passing Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment It sets.The more specific example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable Medium, because can be for example by carrying out optical scanner to paper or other media, then into edlin, interpretation or when necessary with it His suitable method is handled electronically to obtain described program, is then stored in computer storage.

It should be appreciated that each section of the present invention can be realized with hardware, software, firmware or combination thereof.Above-mentioned In embodiment, software that multiple steps or method can in memory and by suitable instruction execution system be executed with storage Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal Discrete logic, with suitable combinational logic gate circuit application-specific integrated circuit, programmable gate array (PGA), scene Programmable gate array (FPGA) etc..

Those skilled in the art are appreciated that realize all or part of step that above-described embodiment method carries Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium In matter, which includes the steps that one or a combination set of embodiment of the method when being executed.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, it can also That each unit physically exists alone, can also two or more units be integrated in a module.Above-mentioned integrated mould The form that hardware had both may be used in block is realized, can also be realized in the form of software function module.The integrated module is such as Fruit is realized in the form of software function module and when sold or used as an independent product, can also be stored in a computer In read/write memory medium.

Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as the limit to the present invention System, those skilled in the art can be changed above-described embodiment, change, replace and become within the scope of the invention Type.

Claims

1. a kind of laser projection module, which is characterized in that the laser projection module includes：

Laser emitter, the laser emitter is for emitting laser；

Collimating element, the collimating element is for collimating the laser；

Diffraction optical element, the diffraction optical element are used for laser of the diffraction after collimating element collimation to form laser Transparency conducting film is formed on pattern, the collimating element and/or the diffraction optical element, the transparency conducting film is equipped with Conductive electrode, the conductive electrode are used to export electric signal after being powered；With

The processor being connect with the conductive electrode, the processor are for obtaining the electric signal, judging the electric signal It is no determined in the preset range and when the electric signal is not in the preset range collimating element and/or The diffraction optical element rupture.

2. laser projection module according to claim 1, which is characterized in that the diffraction optical element includes opposite spreads out The plane of incidence and diffraction exit facet are penetrated, when being formed with transparency conducting film on the diffraction optical element, the transparency conducting film is set It sets on the diffraction plane of incidence or the diffraction exit facet.

3. laser projection module according to claim 2, which is characterized in that the conductive electrode is single, the conduction Electrode includes diffraction output end and diffraction input terminal, and the diffraction output end and the diffraction input terminal are connected to the processor And form galvanic circle.

4. laser projection module according to claim 2, which is characterized in that the conductive electrode be it is a plurality of, it is a plurality of described Conductive electrode mutually disjoints, and every conductive electrode includes diffraction output end and diffraction input terminal, each diffraction output End and each diffraction input terminal are connected to the processor to form galvanic circle.

5. laser projection module according to claim 2, which is characterized in that the conductive electrode is a plurality of, the conduction Electrode includes a plurality of first diffraction conductive electrode disposed in parallel, a plurality of second diffraction conductive electrode disposed in parallel and a plurality of frame Bridge diffraction conductive electrode, a plurality of first diffraction conductive electrode and a plurality of second diffraction conductive electrode are crisscross, often First diffraction conductive electrode described in item is continuously uninterrupted, and every the second diffraction conductive electrode is with corresponding a plurality of described The staggered place of one diffraction conductive electrode disconnects and is not turned on a plurality of first diffraction conductive electrode；Every bridge formation diffraction The gap of the corresponding second diffraction conductive electrode is connected conductive electrode；The bridge formation diffraction conductive electrode and described the The intervening portion of one diffraction conductive electrode is provided with diffraction insulator；The both ends of every the first diffraction conductive electrode with it is described To form galvanic circle, the both ends of every the second diffraction conductive electrode are connected to the processor to be formed for processor connection Galvanic circle.

6. laser projection module according to claim 1, which is characterized in that the diffraction optical element includes opposite spreads out The plane of incidence and diffraction exit facet are penetrated, when being formed with transparency conducting film on the diffraction optical element, the transparency conducting film packet Include be arranged the diffraction plane of incidence the first diffraction conductive film and the second diffraction conductive film in the diffraction exit facet is set, A plurality of first diffraction conductive electrode disposed in parallel is provided on the first diffraction conductive film, on the second diffraction conductive film It is provided with a plurality of second diffraction conductive electrode disposed in parallel, the first diffraction conductive electrode is on the diffraction exit facet Projection is crisscross with the second diffraction conductive electrode, both ends and the processor of every the first diffraction conductive electrode To form galvanic circle, the both ends of every the second diffraction conductive electrode are connected to the processor to form conductive return for connection Road.

7. laser projection module according to claim 1, which is characterized in that the collimating element includes that opposite collimation enters Face and collimation exit facet are penetrated, when being formed with transparency conducting film on the collimating element, the transparency conducting film is arranged described On collimated incident face or the collimation exit facet.

8. laser projection module according to claim 7, which is characterized in that the conductive electrode is single, the conduction Electrode includes collimation output end and collimation input terminal, and the collimation output end and the collimation input terminal are connected to the processor And form galvanic circle.

9. laser projection module according to claim 7, which is characterized in that the conductive electrode be it is a plurality of, it is a plurality of described Conductive electrode mutually disjoints, and every conductive electrode includes collimation output end and collimation input terminal, each collimation output End and each collimation input terminal are connected to the processor to form galvanic circle.

10. laser projection module according to claim 7, which is characterized in that the conductive electrode is a plurality of, the conduction Electrode includes a plurality of first collimation conductive electrode, a plurality of second collimation conductive electrode disposed in parallel and a plurality of frame disposed in parallel Bridge collimates conductive electrode, and a plurality of first collimation conductive electrode and a plurality of second collimation conductive electrode are crisscross, often First collimation conductive electrode described in item is continuously uninterrupted, and every second collimation conductive electrode is with corresponding a plurality of described the The staggered place of one collimation conductive electrode disconnects and is not turned on a plurality of first collimation conductive electrode；Every bridge formation collimation The gap of the corresponding second collimation conductive electrode is connected conductive electrode；Bridge formation collimation conductive electrode and described the The intervening portion of one collimation conductive electrode is provided with collimation insulator；Every it is described first collimation conductive electrode both ends with it is described Processor is connected to be formed into a loop, and the both ends of every the second collimation conductive electrode are connected to the processor to form conduction Circuit.

11. laser projection module according to claim 1, which is characterized in that the collimating element includes opposite collimation The plane of incidence and collimation exit facet, when being formed with transparency conducting film on the collimating element, the transparency conducting film includes setting The collimated incident face the first collimation conductive film and the second collimation conductive film in the collimation exit facet is set, described the It is provided with a plurality of first collimation conductive electrode disposed in parallel on one collimation conductive film, is provided on the second collimation conductive film It is a plurality of it is disposed in parallel second collimation conductive electrode, it is described first collimation conductive electrode it is described collimation exit facet on projection with It is described second collimation conductive electrode it is crisscross, every it is described first collimation conductive electrode both ends be connected to the processor with Galvanic circle is formed, the both ends of every the second collimation conductive electrode are connected to the processor to form galvanic circle.

12. a kind of detection method of laser projection module rupture, which is characterized in that the laser projection module includes Laser emission Device, collimating element and diffraction optical element, for the laser emitter for emitting laser, the collimating element is described for collimating Laser, the diffraction optical element are used for laser of the diffraction after collimating element collimation to form laser pattern, the standard Transparency conducting film is formed on straight element and/or the diffraction optical element, the transparency conducting film is equipped with conductive electrode, institute It states after conductive electrode is powered for exporting electric signal；The detection method includes：

Judge the electric signal whether in preset range；With

Determine that the collimating element and/or the diffraction optical element are broken when the electric signal is not in the preset range It splits.

13. detection method according to claim 12, which is characterized in that described obtain after the conductive electrode is powered exports Electric signal the step of be the laser projection module open before execute.

14. detection method according to claim 12, which is characterized in that the detection method further includes：

Obtain the movement velocity of the laser projection module；

Judge whether the movement velocity is more than predetermined speed；With

When the movement velocity of the laser projection module is more than predetermined speed, executes and exported after obtaining the conductive electrode energization Electric signal the step of.

15. a kind of depth camera, which is characterized in that the depth camera includes：

Laser projection module described in claim 1 to 11 any one；

Image acquisition device, described image collector is for acquiring the laser projected from the laser projection module into object space Pattern；With

The processor is for handling the laser pattern to obtain depth image.

16. a kind of electronic device, which is characterized in that the electronic device includes：

Shell；With

Depth camera described in claim 15, depth camera setting expose on the housing and from the shell with Obtain the depth image.