Laser light source and forming method and imaging method thereof

Abstract

The invention discloses a laser light source and a forming method and an imaging method thereof, and the laser light source comprises a flexible substrate which comprises a first surface and a second surface which are opposite to each other; a plurality of vertical cavity surface emitting laser light source units arranged on the first surface of the flexible substrate, wherein the plurality of vertical cavity surface emitting laser light source units are distributed in rows and columns; the prism structure is attached to the flexible substrate, the first face of the flexible substrate faces the prism structure, and the prism structure and the flexible substrate are bent towards the second face of the flexible substrate. The imaging effect of the laser light source is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser light sources, and in particular to a laser light source and a forming method and an imaging method thereof. Background Art

[0002] Vertical-Cavity Surface-Emitting Laser (VCSEL) is a special laser light source. Its structure allows the light beam to be emitted vertically directly from the chip surface, which results in less energy loss and higher efficiency. This laser light source is used in many fields, such as optical communications, optical storage, and medical fields.

[0003] The imaging effect of structured light radar devices that use lasers emitted by vertical cavity surface emitting laser sources as light sources needs to be continuously improved. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a laser light source and a forming method and an imaging method thereof, so that the imaging effect is improved.

[0005] In order to solve the above technical problems, the technical solution of the present invention provides a laser light source, including: a flexible substrate, the flexible substrate including a first surface and a second surface opposite to each other; a plurality of vertical cavity surface emitting laser light source units arranged on the first surface of the flexible substrate, the plurality of vertical cavity surface emitting laser light source units are distributed in rows and columns; a prism structure bonded to the flexible substrate, the first surface of the flexible substrate faces the prism structure, and the prism structure and the flexible substrate are bent toward the second surface of the flexible substrate.

[0006] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0007] In the laser light source of the present invention, a plurality of the vertical cavity surface emitting laser light source units are distributed on a flexible substrate in rows and columns, and the prism structure and the flexible substrate are bent toward the second surface of the flexible substrate. On the one hand, the second surface of the flexible substrate is bent, and the light emitted by the plurality of the vertical cavity surface emitting laser light source units distributed on the second surface of the flexible substrate can cover a larger angle distribution range, so that the light emission angle of the laser light source as a whole is increased, and objects within a larger range can be covered, thereby increasing the imaging range; on the other hand, each of the vertical cavity surface emitting laser light source units emits light, so each light spot can come from a corresponding vertical cavity surface emitting laser light source unit light source, and the single-point light spot light is strong enough, and a complex optical system of the light source is not required, thereby improving the stability of the system; on the other hand, the prism structure can further disperse the light emitted by each laser light source unit, further increasing the light emission angle of the laser light source as a whole, thereby increasing the imaging range.

[0008] Furthermore, the curved flexible substrate and prism structure are attached to the surface of the rotating structure, and the rotating axis can rotate in any direction, so that the light emitted by the laser light source can achieve any emission angle, forming an omnidirectional light source, which is conducive to dynamic imaging of objects.

[0009] The imaging method of the laser light source of the present invention, the laser light source has vertical cavity surface emitting laser light source units with various emission angles, each light spot comes from a light source, the single point light spot light is strong enough and easy to image; in addition, the single point light spot light is strong enough and not dispersed, so that the imaging process of multiple vertical cavity surface emitting laser light source units can speed up the calculation speed of the radar and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the optical path after a vertical cavity surface emitting laser light source emits laser light in one embodiment;

[0011] Figures 2 to 7 is a schematic structural diagram of a laser light source in a first embodiment of the present invention;

[0012] Figures 8 to 10 is a schematic structural diagram of a laser light source in a second embodiment of the present invention;

[0013] Fig.11 is a schematic flow chart of a method for forming a laser light source according to an embodiment of the present invention;

[0014] Fig.12 is a schematic structural diagram of a laser light source in a third embodiment of the present invention;

[0015] Figures 13 to 16 It is a schematic flow chart of the imaging method of the laser light source in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] As described in the background art, the imaging effect of the structured light radar device using the laser emitted by the vertical cavity surface emitting laser light source as the light source needs to be continuously improved. Now, an analysis and explanation will be given in conjunction with a specific embodiment.

[0017] Figure 1 It is a schematic diagram of the optical path after a vertical cavity surface emitting laser light source emits laser in one embodiment.

[0018] Please refer to Figure 1The optical path after the vertical cavity surface emitting laser light source emits the laser includes: after the vertical cavity surface emitting laser light source 40 (VCSEL) emits the light, the light beam is shaped by the beam shaper 41 (Beam Shaper), and then the laser direction is further adjusted by the DOE diffraction grating 42, and then the adjusted light is emitted by the optical projection lens 43 (Projection Lens), and the optical projection lens 43 has a beam outlet 431, and the adjusted light is emitted through the beam outlet 431.

[0019] The beam shaper 41 includes an optical beam expander 411 (Beam Homogenizer) and an optical collimator 412 (Collection Lens). The optical beam expander 411 is used to disperse the laser light and process the laser light into stripes or dots. The optical collimator 412 is used to collimate the dispersed laser light.

[0020] The imaging principle of the vertical cavity surface emitting laser light source is: scattered stripes or dot lasers are projected onto the surface of an object and then reflected. The laser receiver receives the reflected laser and calculates the distance between the object and the light source. When the laser is projected onto the surface of a three-dimensional object, the height of the physical surface can be inferred based on the changes in the light source pattern.

[0021] However, after the laser light source needs to be processed into stripes or dots, the light intensity of the light source is relatively dispersed, and the reflected light from distant objects is not strong enough, making it difficult to form an image.

[0022] In order to solve the above problems, the technical solution of the present invention provides a laser light source and a formation method and an imaging method thereof, wherein a plurality of the vertical cavity surface emitting laser light source units are arranged in rows and columns on a flexible substrate, and the prism structure and the flexible substrate are bent toward the second surface of the flexible substrate. On the one hand, the second surface of the flexible substrate is bent, and the light emitted by the plurality of the vertical cavity surface emitting laser light source units distributed on the second surface of the flexible substrate can cover a larger angle distribution range, so that the light emission angle of the laser light source as a whole is increased, and objects within a larger range can be covered, thereby increasing the imaging range; on the other hand, each of the vertical cavity surface emitting laser light source units emits light, so that each light spot can come from a corresponding vertical cavity surface emitting laser light source unit light source, and the single-point light spot light is strong enough, and a complex optical system of the light source is not required, thereby improving the stability of the system; on the other hand, the prism structure can further disperse the light emitted by each laser light source unit, further increasing the light emission angle of the laser light source as a whole, thereby increasing the imaging range.

[0023] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Figures 2 to 7 It is a schematic diagram of the structure of the laser light source in the first embodiment of the present invention.

[0025] Please refer to Figures 2 to 7 , the laser light source comprises:

[0026] A flexible substrate 100, wherein the flexible substrate 100 includes a first surface S1 and a second surface S2 opposite to each other;

[0027] A plurality of vertical cavity surface emitting laser light source units 101 are disposed on the first surface S1 of the flexible substrate 100, and the plurality of vertical cavity surface emitting laser light source units 101 are distributed in rows and columns;

[0028] The prism structure 102 adheres to the flexible substrate 100 , the first surface S1 of the flexible substrate 100 faces the prism structure 102 , and the prism structure 102 and the flexible substrate 100 are bent toward the second surface S2 of the flexible substrate 100 .

[0029] In the laser light source, a plurality of the vertical cavity surface emitting laser light source units 101 are distributed in rows and columns, and the prism structure 102 and the flexible substrate 100 are bent toward the second surface S2 of the flexible substrate 100. On the one hand, the second surface S2 of the flexible substrate 100 is bent, and the light emitted by the plurality of the vertical cavity surface emitting laser light source units distributed on the second surface S2 of the flexible substrate 100 can cover a larger angle distribution range, so that the light emission angle of the laser light source as a whole is increased, and objects within a larger range can be covered, thereby increasing the imaging range. On the other hand, each of the vertical cavity surface emitting laser light source units emits light, so each light spot can come from a corresponding vertical cavity surface emitting laser light source unit light source, and the single-point light spot light is strong enough, and a complex optical system of the light source is not required, thereby improving the stability of the system. On the other hand, the prism structure 102 can further disperse the light emitted by each vertical cavity surface emitting laser light source unit 101, thereby further increasing the light emission angle of the laser light source as a whole, thereby increasing the imaging range.

[0030] Please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 is a structural schematic diagram of an unbent flexible substrate 100 and a plurality of vertical cavity surface emitting laser light source units 101 distributed in an array on the flexible substrate 100, Figure 2 for Figure 3 A top view of the first surface S1 in FIG. Figure 3 for Figure 2 Side view of.

[0031] Please refer to Figures 4 to 6 , Figures 4 to 6is a schematic structural diagram of the unbent prism structure 102, Figure 4 is a top view of the prism structure 102, Figure 5 for Figure 4 Schematic diagram of the cross-section structure along the section line CC1, Figure 6 for Figure 5 The enlarged schematic diagram of the first sawtooth in FIG. 1 shows a prism structure 102 including a central area A and a threaded area B surrounding the central area A. The prism structure 102 includes a relative functional surface 1021 and a non-functional surface 1022, and the non-functional surface 1022 is used to fit with the flexible substrate 100.

[0032] The prism structure 102 is used to further diffract the light emitted by the plurality of vertical cavity surface emitting laser light source units 101, thereby increasing the degree of light dispersion and improving the imaging range.

[0033] In this embodiment, the functional surface 1021 of the threaded area B includes a plurality of raised rings 103 , the plurality of raised rings 103 surround the central area A, and the plurality of raised rings 103 are distributed in concentric rings; the functional surface 1021 of the central area A includes a convex structure 104 .

[0034] In this embodiment, the widths of the plurality of raised rings 103 are the same. The widths of the plurality of raised rings 103 are the same, so that the prism structure 102 is easy to manufacture.

[0035] In other embodiments, the widths of the plurality of raised rings may not be exactly the same.

[0036] The several raised rings are an independent lens, each of which has a different focal length. According to the angle and range of diffraction of the light required by the vertical cavity surface emitting laser light source unit 101 corresponding to the raised ring 103, the widths of the several raised rings are adjusted to be completely the same or not completely the same according to design requirements to ensure that the light emitted by the vertical cavity surface emitting laser light source unit 101 has a wider angle diffraction range, thereby improving the imaging range.

[0037] In this embodiment, the cross-sectional shape of some of the raised rings 103 includes a first sawtooth shape.

[0038] Please continue to refer to Figure 6 In this embodiment, the first sawtooth includes a tooth back 1031 and a throat 1032 , and the tooth back 1031 of the first sawtooth is recessed toward the non-functional surface 1022 .

[0039] In other embodiments, the tooth back of the first sawtooth protrudes in a direction away from the functional surface.

[0040] The non-functional surface 1022 of the prism structure 102 is attached to the flexible substrate 100, and the back of the first sawtooth can be concave or convex. The back of the first sawtooth can be adjusted to be concave or convex according to the angle and range of diffraction of light required for a number of vertical cavity surface emitting laser light source units 101, so as to ensure that the light emitted by the vertical cavity surface emitting laser light source unit 101 has a wider diffraction range at a wider angle, thereby improving the imaging range.

[0041] In this embodiment, the cross-sectional shape of the convex structure 104 includes a second sawtooth shape, and the width d2 of the second sawtooth is greater than the width of the first sawtooth d1.

[0042] The width d2 of the second sawtooth is the width of the central area A along the surface of the flexible board 100 , and the width d1 of the first sawtooth is the width of the raised ring 103 along the surface of the flexible board 100 .

[0043] Please continue to refer to Figure 2 In this embodiment, the plurality of vertical cavity surface emitting laser light source units 101 corresponding to the central area A have a first row spacing R1 and a first column spacing C1, and the plurality of vertical cavity surface emitting laser light source units 101 corresponding to the threaded area B have a second row spacing R2 and a second column spacing C2.

[0044] In this embodiment, the first row spacing R1 is different from the second row spacing R2, and the first column spacing C1 is different from the second column spacing C2. Therefore, the arrangement of the plurality of vertical cavity surface emitting laser light source units 101 can be adjusted according to the width of the central area A and the width of the threaded area B, according to the curvature of the central area A and the curvature of the threaded area B, or according to the required light emitting angle of the vertical cavity surface emitting laser light source unit 101, so that the application of the laser light source is more flexible.

[0045] In this embodiment, the first row spacing R1 is greater than the second row spacing R2; the first column spacing C1 is greater than the second column spacing C2.

[0046] In other embodiments, the row spacings between the vertical cavity surface emitting laser light source units in several rows are the same; the column spacings between the vertical cavity surface emitting laser light source units in several columns are the same. Thus, the vertical cavity surface emitting laser light source units distributed in an array are easy to layout and design, can save the layout area, and are easy to operate when transferred through a mass transfer process.

[0047] In this embodiment, the thickness h1 of the prism structure 102 is in the range of: greater than or equal to 1 mm. The prism structure 102 in the above thickness range can have sufficient strength when bent while maintaining the effect of light diffraction.

[0048] The thickness h1 of the prism structure 102 is the distance between the highest point of the convex structure 104 and the non-functional surface 1022 , or the distance between the highest point of the raised ring 103 and the non-functional surface 1022 .

[0049] Please refer to Figure 7 , Figure 7 The flexible substrate 100 and the prism structure 102 attached to the flexible substrate 100 are bent toward the second surface S2 of the flexible substrate 100. The non-functional surface 1022 of the prism structure 102 is attached to the first surface S1 of the flexible substrate 100. The laser light source includes a first part P1 and a second part P2.

[0050] The interface between the first portion P1 and the second portion P2 is a central plane perpendicular to the surface of the flexible substrate 100 .

[0051] The prism structure 102 and the flexible substrate 100 are bent toward the second surface S2 of the flexible substrate 100 , and the curvature radius ranges from 1 cm to 10 cm.

[0052] In one embodiment, a curvature radius r1 of the first portion P1 and a curvature radius r2 of the second portion P2 are different.

[0053] In another embodiment, the curvature radius r1 of the first portion P1 and the curvature radius r2 of the second portion P2 are the same.

[0054] The curvature radius r1 of the first part P1 and the curvature radius r2 of the second part P2 may be the same or different. By adjusting the curvature radius r1 of the first part P1 and the curvature radius r2 of the second part P2, the light-emitting angles of several vertical cavity surface emitting laser light source units 101 can be flexibly adjusted, thereby increasing the light-emitting angles of the laser light sources.

[0055] Please continue to refer to Figure 2 The laser light source also includes: a plurality of thin film transistors arranged on the first surface S1 of the flexible substrate 100, the thin film transistors are electrically connected to the vertical cavity surface emitting laser light source unit 101, and the thin film transistors are used to control whether the vertical cavity surface emitting laser light source unit 101 is switched on or off.

[0056] In this embodiment, the plurality of vertical cavity surface emitting laser light source units 101 are distributed in rows and columns, the vertical cavity surface emitting laser light source units 101 in each column are electrically connected, and the vertical cavity surface emitting laser light source units 101 in each row are electrically connected, so that the vertical cavity surface emitting laser light source units 101 in one row and one column can be controlled separately, so that the plurality of vertical cavity surface emitting laser light source units 101 emit light according to a set timing.

[0057] Please continue to refer to Figure 7 The laser light source also includes: an optical glue 110 arranged between the first surface S1 of the flexible substrate 100 and the prism structure 102, the optical glue 110 is used to bond the prism structure 102 and the flexible substrate 100, and the optical glue 110 also covers the top plate surface and side wall surface of several of the vertical cavity surface emitting laser light source units 101.

[0058] In this embodiment, the thickness of the optical adhesive 110 is greater than the thickness of the vertical cavity surface emitting laser light source unit 101. Therefore, the optical adhesive 110 can protect the vertical cavity surface emitting laser light source unit 101, and prevent the vertical cavity surface emitting laser light source unit 101 from being damaged when the flexible substrate 100 and the prism structure 102 are attached.

[0059] In this embodiment, the transmittance of the optical adhesive 110 is greater than 90%. The transmittance of the optical adhesive 110 is relatively large, so that when the vertical cavity surface emitting laser light source unit 101 emits light, light loss can be reduced.

[0060] Figures 8 to 10 Schematic diagram of the structure of the laser light source in the second embodiment of the present invention.

[0061] Please refer to Figures 8 to 10 , Figures 8 to 10 is a schematic structural diagram of the unbent prism structure 102, Figure 8 is a top view of the prism structure 102, Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure along the section line CC1. Fig.10 for Fig. 9 The enlarged schematic diagram of the first sawtooth in FIG. 1 shows a prism structure 102 including a central area A and a threaded area B surrounding the central area A. The prism structure 102 includes a relative functional surface 1021 and a non-functional surface 1022, and the non-functional surface 1022 is used to fit with the flexible substrate 100.

[0062] In this embodiment, the functional surface 1021 of the threaded area B includes a plurality of raised rings 203 , the plurality of raised rings 203 surround the central area A, and the plurality of raised rings 203 are distributed in concentric rings; the functional surface 1021 of the central area A includes a convex structure 204 .

[0063] Figures 8 to 10 The prism structure 102 and Figures 4 to 6The difference between the prism structure 102 in the embodiment is that, in the present embodiment, the cross-sectional shape of some of the raised rings 103 includes a first sawtooth shape, the first sawtooth includes a tooth back 2031 and a throat 2032, the tooth back 2031 of the first sawtooth protrudes in a direction away from the functional surface 1021; the cross-sectional shape of the convex structure 204 includes a semicircle.

[0064] In this embodiment, the width d3 of the first sawtooth is smaller than the width d4 of the convex structure 204 .

[0065] The width d4 of the convex structure 204 is the width of the central area A along the surface of the flexible board 100 , and the width d3 of the first sawtooth is the width of the raised ring 103 along the surface of the flexible board 100 .

[0066] In this embodiment, the thickness h2 of the prism structure 102 is in the range of: greater than or equal to 1 mm. The prism structure 102 in the above thickness range can have sufficient strength when bent while maintaining the effect of light diffraction.

[0067] The thickness h2 of the prism structure 102 is the distance between the highest point of the convex structure 204 and the non-functional surface 1022 , or the distance between the highest point of the raised ring 203 and the non-functional surface 1022 .

[0068] By adjusting the shapes of the raised ring 203 and the convex structure 204 on the surface of the prism structure 102, the dispersion degree of the light emitted by the plurality of vertical cavity surface emitting laser light source units 101 is adjusted, so that the light emitting angle of the laser light source is increased.

[0069] Fig.11 It is a schematic flow chart of the method for forming the laser light source described in an embodiment of the present invention.

[0070] Please refer to Fig.11 , the method for forming the laser light source comprises:

[0071] Step S1: Provide Figure 2 and Figure 3 The flexible substrate 100 includes a first surface S1 and a second surface S2 that are opposite to each other;

[0072] Step S2: Provide Figure 2 and Figure 3 The plurality of vertical cavity surface emitting laser light source units 101;

[0073] Step S3: using a mass transfer process to arrange a plurality of the vertical cavity surface emitting laser light source units 101 on the first surface S1 of the flexible substrate 100, wherein the plurality of the vertical cavity surface emitting laser light source units 101 are distributed in rows and columns;

[0074] Step S4: providing a prism structure 102, and attaching the prism structure 102 to the flexible substrate 100, with the first surface S1 of the flexible substrate 100 facing the prism structure 102;

[0075] Step S5: bending the prism structure 102 and the flexible substrate 100 toward the second surface S2 of the flexible substrate 100 .

[0076] In this embodiment, a mass transfer process is used to transfer a plurality of the vertical cavity surface emitting laser light source units 101 to the first surface S1 of the flexible substrate 100, thereby improving production efficiency.

[0077] In this embodiment, the prism structure 102 and the flexible substrate 100 are bonded together by optical glue, and the optical glue has a high transmittance to minimize light loss. In this embodiment, the optical glue is ultraviolet optical glue, and the ultraviolet optical glue can be cured under the action of ultraviolet rays to achieve the purpose of combining the prism structure 102 with the flexible substrate 100.

[0078] In this embodiment, the prism structure 102 is Figures 4 to 6 The prism structure 102 described in Figures 8 to 10 The prismatic structure 102 described in FIG.

[0079] Fig.12 Schematic diagram of the structure of the laser light source in the third embodiment of the present invention.

[0080] Please refer to Fig.12 , Fig.12 For Figure 7 Based on the schematic diagram, the laser light source also includes: a rotating structure 300, the flexible substrate 100 is arranged on the surface of the rotating structure 300, and the flexible substrate 100 partially surrounds the surface of the rotating structure 300 along the rotation direction X of the rotating structure 300 or fully surrounds the surface of the rotating structure 300.

[0081] In this embodiment, the rotating structure 300 includes a rotating shaft.

[0082] In other embodiments, the rotating mechanism may also be other structures that meet the requirements.

[0083] In this embodiment, the second surface S2 of the flexible substrate 100 and the rotating structure 300 are bonded together by solid optical adhesive or other non-optical adhesive, and other non-optical adhesives include thermosetting adhesives and the like.

[0084] The curved flexible substrate 100 and the prism structure 102 are attached to the surface of the rotating structure 300, and the rotating shaft 300 can rotate in any direction, so that the light emitted by the laser light source can achieve any emission angle, forming an omnidirectional light source, which is conducive to dynamic imaging of objects.

[0085] Figures 13 to 16 It is a schematic flow chart of the imaging method of the laser light source in an embodiment of the present invention.

[0086] Please refer to Fig.13 , the imaging method of the laser light source comprises:

[0087] Step S10: providing a laser light source;

[0088] Step S20: imaging a static object according to the laser light source;

[0089] Step S30: imaging the dynamic object according to the laser light source.

[0090] The laser light source in step S10 is Figures 2 to 6 The laser light source described in Figure 7 and Figure 8 The laser light source described in Fig.10 The laser light source described in .

[0091] The laser light source has vertical cavity surface emitting laser light source units with various emission angles. Each light spot comes from a light source. The light of a single point light spot is strong enough and easy to image. In addition, the light of a single point light spot is strong enough and not scattered, so the imaging process of multiple vertical cavity surface emitting laser light source units can speed up the calculation speed of the radar and improve efficiency.

[0092] Next, each step is analyzed and explained.

[0093] Please continue to refer to Fig.13 , execute step S20: imaging the static object according to the laser light source.

[0094] Please refer to Fig.14 In this embodiment, imaging a static object according to a laser light source includes:

[0095] Step S201: a plurality of vertical cavity surface emitting laser light source units emit laser light to a surface of an object, each vertical cavity surface emitting laser light source unit having a corresponding emission angle;

[0096] Step S202: The laser receiver receives reflected light from the surface of the object, and each reflected light has a corresponding reflection angle;

[0097] Step S203: The laser receiver converts the optical signal into an electrical signal;

[0098] Step S204: the image processor processes the electrical signal into a plurality of frames of light spot images, wherein the light spot images include a plurality of reflected light spots;

[0099] Step S205: the image processor obtains the vertical cavity surface emitting laser light source unit corresponding to the reflection light spot, and calculates the coordinates of the reflection light spot through the incident angle and the reflection angle;

[0100] Step S206: imaging the static object according to a number of coordinates.

[0101] according to Figures 2 to 7 The laser source described in, or Figures 8 to 10 The laser source described in, or Fig.12 The laser light source in the image is used to image static objects. Each light spot comes from a vertical cavity surface emitting laser light source unit. The light of a single point light spot is strong enough, and each light spot corresponds to a different emission angle. The emission angle of each light spot can be calculated by the arrangement of the light spots. Combined with the imaging angle, the depth coordinate of the reflection point can be calculated, and then imaging can be achieved.

[0102] During the imaging of static objects, the vertical cavity surface emitting laser light source unit array is driven to emit light by scanning, that is, the vertical cavity surface emitting laser light source unit array will receive data line by line, and will not emit light at the time of receiving data. After receiving the data, it will be turned on or off according to the received data before the next round of data arrives. From the perspective of video recording, the camera also obtains data by scanning, and the scan obtains the total amount of light signal captured within one frame. When the display and video scanning speeds are close, the situation that the vertical cavity surface emitting laser light source does not emit light during the period of receiving data has basically no effect on the captured signal, while turning it on or off according to the data will affect the brightness of 1 to 2 frames.

[0103] A plurality of vertical cavity surface emitting laser light source units emit lasers, including: a plurality of the vertical cavity surface emitting laser light source units emit lasers simultaneously, or a plurality of the vertical cavity surface emitting laser light source units emit lasers in a time sequence.

[0104] In this embodiment, a plurality of the vertical cavity surface emitting laser light source units emit lasers in a time sequence, and each of the vertical cavity surface emitting laser light source units has a corresponding light emission time sequence.

[0105] During the imaging of static objects, the position of each light spot can be calculated by setting a different light emission timing for each vertical cavity surface emitting laser light source unit. For example, if there are 1,000 light spots, the position can be distinguished by about 10 frames of data, and the light emission timing of a point can be calculated based on the history of the light emission of a light spot at a certain position, so as to find the corresponding vertical cavity surface emitting laser light source unit.

[0106] Please refer to Fig.15 In this embodiment, the image processor obtains the vertical cavity surface emitting laser light source unit corresponding to the reflected light spot, including:

[0107] Step S2051: obtaining the light emission history of the reflected light spot at a preset time;

[0108] Step S2052: Calculating the light emission timing of the reflection light spot according to the light emission history and the preset time;

[0109] Step S2053: acquiring a corresponding vertical cavity surface emitting laser light source unit according to the light emission timing.

[0110] A prism structure is arranged outside the vertical cavity surface emitting laser light source units. The light emitted by the vertical cavity surface emitting laser light source units is dispersed after passing through the prism structure. In fact, the light of a vertical cavity surface emitting laser light source unit incident on the surface of an object has many incident angles, and the incident angle corresponds to the vertical cavity surface emitting laser light source unit: that is, a calibration test can be performed when the image source leaves the factory, and the reflected image of all light points on a plane at a specific distance can be captured, and the emission angle of each point can be inferred by the position of the image.

[0111] Please continue to refer to Fig.13 , execute step S30: imaging the dynamic object according to the laser light source.

[0112] Please refer to Fig.16 In this embodiment, imaging a dynamic object according to the laser light source includes:

[0113] Step S301: a plurality of the vertical cavity surface emitting laser light source units emit lasers in a time sequence, and each vertical cavity surface emitting laser light source unit has a corresponding emission angle;

[0114] Step S302: The laser receiver receives reflected light from the surface of the object, and each reflected light has a corresponding reflection angle;

[0115] Step S303: The laser receiver converts the optical signal into an electrical signal;

[0116] Step S304: the image processor processes the electrical signal into a plurality of frames of light spot images;

[0117] Step S305: when the position coordinates of two adjacent frames of light spot images are different, it is determined that a new light spot has appeared;

[0118] Step S306: imaging the dynamic object according to the new light spots.

[0119] The dynamic imaging process of the laser light source is easy to obtain and imaging is easy.

[0120] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A laser light source, characterized in that: include: A flexible substrate, the flexible substrate comprising a first surface and a second surface opposite to each other; A plurality of vertical cavity surface emitting laser light source units are disposed on the first surface of the flexible substrate, wherein the plurality of vertical cavity surface emitting laser light source units are distributed in rows and columns; A prism structure adhered to the flexible substrate, wherein the first surface of the flexible substrate faces the prism structure, and the prism structure and the flexible substrate are bent toward the second surface of the flexible substrate.

2. The laser light source according to claim 1, characterized in that: The prism structure comprises: a central area and a threaded area surrounding the central area, the prism structure comprises opposite functional surfaces and non-functional surfaces, the non-functional surfaces are in contact with the flexible substrate; the functional surface of the threaded area comprises a plurality of raised rings, the plurality of raised rings surround the central area, and the plurality of raised rings are distributed in concentric rings; The functional surface of the central area includes a convex transparent structure.

3. The laser light source according to claim 2, characterized in that: The cross-sectional shapes of several of the raised rings include a first sawtooth shape.

4. The laser light source according to claim 3, characterized in that: The tooth back of the first sawtooth is recessed toward the non-functional surface.

5. The laser light source according to claim 3, characterized in that: The tooth back of the first sawtooth protrudes in a direction away from the functional surface.

6. The laser light source according to claim 3, characterized in that: The cross-sectional shape of the convex structure includes a second sawtooth shape, and the width of the second sawtooth is greater than the width of the first sawtooth.

7. The laser light source according to claim 2, characterized in that: The cross-sectional shape of the convex structure includes a semicircle.

8. The laser light source according to claim 2, characterized in that: Several vertical cavity surface emitting laser light source units corresponding to the central area have a first row spacing and a first column spacing, and several vertical cavity surface emitting laser light source units corresponding to the threaded area have a second row spacing and a second column spacing, the first row spacing is different from the second row spacing, and the first column spacing is different from the second column spacing.

9. The laser light source according to claim 8, characterized in that: The first row spacing is greater than the second row spacing; the first column spacing is greater than the second column spacing.

10. The laser light source according to claim 1, characterized in that: The row spacings between the vertical cavity surface emitting laser light source units in a plurality of rows are the same; the column spacings between the vertical cavity surface emitting laser light source units in a plurality of columns are the same.

11. The laser light source according to claim 1, characterized in that: The laser light source includes a first part and a second part. The first part and the second part are bent with different radii of curvature, or the first part and the second part are bent with the same radii of curvature.

12. The laser light source according to claim 11, characterized in that: The prism structure and the flexible substrate are bent toward the second surface of the flexible substrate, and the radius of curvature ranges from 1 cm to 10 cm.

13. The laser light source according to claim 1, characterized in that: Also includes: A plurality of thin film transistors are arranged on the first surface of the flexible substrate, the thin film transistors are electrically connected to the vertical cavity surface emitting laser light source unit, and the thin film transistors are used to control whether the vertical cavity surface emitting laser light source unit is turned on or off.

14. The laser light source according to claim 1, characterized in that: Also includes: An optical adhesive is arranged between the first surface of the flexible substrate and the prism structure, and is used to adhere the prism structure to the flexible substrate. The optical adhesive also covers the top plate surface and side wall surfaces of several vertical cavity surface emitting laser light source units.

15. The laser light source according to claim 14, characterized in that: The thickness of the optical glue is greater than the thickness of the vertical cavity surface emitting laser light source unit.

16. The laser light source according to claim 14, characterized in that: The transmittance range of the optical adhesive is greater than 90%.

17. The laser light source according to claim 1, characterized in that: The laser light source further includes: a rotating structure, the flexible substrate is arranged on the surface of the rotating structure, and the flexible substrate partially surrounds the surface of the rotating structure or fully surrounds the surface of the rotating structure along the rotating direction of the rotating structure.

18. The laser light source according to claim 1, characterized in that: The thickness of the prism structure is in the range of greater than or equal to 1 mm.

19. A method for forming a laser light source as claimed in any one of claims 1 to 18, characterized in that: include: Providing a flexible substrate, the flexible substrate comprising a first surface and a second surface opposite to each other; Providing a plurality of vertical cavity surface emitting laser light source units; A plurality of the vertical cavity surface emitting laser light source units are arranged on the first surface of the flexible substrate by using a mass transfer process, wherein the plurality of the vertical cavity surface emitting laser light source units are distributed in rows and columns; Providing a prism structure, and attaching the prism structure to the flexible substrate, with the first surface of the flexible substrate facing the prism structure; The prism structure and the flexible substrate are bent toward the second surface of the flexible substrate.

20. A laser light source imaging method, characterized in that: include: Providing a laser light source as claimed in any one of claims 1 to 18; Imaging a static object according to the laser light source; Dynamic objects are imaged according to the laser light source.

21. The imaging method of a laser light source according to claim 20, characterized in that: Imaging a static object according to the laser light source includes: a plurality of vertical cavity surface emitting laser light source units emit lasers to the surface of the object, each of which has a corresponding emission angle; a laser receiver receives reflected light from the surface of the object, each of which has a corresponding reflection angle; the laser receiver converts the optical signal into an electrical signal; an image processor processes the electrical signal into a plurality of frames of light spot images, the light spot images including a plurality of reflected light spots; the image processor obtains the vertical cavity surface emitting laser light source unit corresponding to the reflected light spot, and calculates the coordinates of the reflected light spot through the incident angle and the reflection angle; and imaging the static object according to the plurality of coordinates.

22. The imaging method of a laser light source according to claim 21, characterized in that: A plurality of vertical cavity surface emitting laser light source units emit lasers, including: a plurality of the vertical cavity surface emitting laser light source units emit lasers simultaneously, or a plurality of the vertical cavity surface emitting laser light source units emit lasers in a time sequence.

23. The imaging method of a laser light source according to claim 21, characterized in that: Several of the vertical cavity surface emitting laser light source units emit lasers in sequence, and each of the vertical cavity surface emitting laser light source units has a corresponding light emission sequence; the image processor obtains the vertical cavity surface emitting laser light source unit corresponding to the reflected light spot, including: obtaining the light emission history of the reflected light spot at a preset moment; calculating the light emission sequence of the reflected light spot according to the light emission history and the preset moment; and obtaining the corresponding vertical cavity surface emitting laser light source unit according to the light emission sequence.

24. The imaging method of a laser light source according to claim 20, characterized in that: Imaging a dynamic object according to the laser light source includes: a plurality of vertical cavity surface emitting laser light source units emit lasers in a time sequence, each vertical cavity surface emitting laser light source unit has a corresponding emission angle; a laser receiver receives reflected light from the surface of the object, each reflected light has a corresponding reflection angle; the laser receiver converts the optical signal into an electrical signal; an image processor processes the electrical signal into a plurality of frames of light spot images; when the position coordinates of two adjacent frames of light spot images are different, it is determined that a new light spot has appeared; and imaging of the dynamic object is performed according to the plurality of new light spots.

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