Light output device and three-dimensional sensing device including same

Abstract

A light output device according to an embodiment of the present invention comprises: a plurality of light source arrays sequentially arranged in a first direction perpendicular to an optical axis direction; a collimating lens disposed on the plurality of light source arrays; and a diffusion member disposed on the collimator lens, in which each of the light source arrays includes a plurality of channels sequentially arranged in a second direction perpendicular to the optical axis direction and the first direction, each of the plurality of light source arrays is configured to be independently driven, and each of the plurality of channels is configured to be independently driven.

Description

Technical Field

[0001] The invention relates to a light output device and a three-dimensional sensing device comprising the light output device. Background Art

[0002] Three-dimensional content is used in many fields such as gaming, culture, education, manufacturing, and autonomous driving, and depth information (depth map) is required to obtain three-dimensional content. Depth information is information that represents distance in space, that is, perspective information of one point relative to another point in a two-dimensional image. Methods for obtaining depth information include a method of projecting infrared (IR) structured light onto an object, a method using a stereo camera, a time-of-flight (TOF) method, and the like.

[0003] A light detection and ranging (LiDAR) device, which is an example of a camera device that acquires three-dimensional information, uses laser pulses, which are emitted from the LiDAR device and then reflected from the target object and returned to the LiDAR device, to measure the distance to a target object or create the shape of a target object. The LiDAR device is applied to various technical fields that require three-dimensional information. For example, the LiDAR device can be applied to various technical fields such as meteorology, aviation, aerospace, and transportation. Recently, the share of LiDAR devices in the field of autonomous driving is rapidly increasing.

[0004] Generally, in a LiDAR device, a light emitting unit generates an output light signal and illuminates an object with the output signal, a light receiving unit receives an input light signal reflected from the object, and an information generating unit generates information about the object using the input light signal received by the light receiving unit.

[0005] The light emitting unit of the LiDAR device includes a scanner, and the scanner may scan an area of ​​a preset field of view (FOV). However, when the light emitting unit of the LiDAR device includes a scanner, the size of the LiDAR device may increase, and the reliability of the LiDAR device may decrease.

[0006] Meanwhile, when the LiDAR device is a structured light module based on a dot pattern, the resolution of the depth information increases as the number of output points increases. In order to increase the number of output points, the number of replicas of the diffractive optical element can be increased. However, as the number of replicas of the diffractive optical element increases, the brightness of each point decreases, and to compensate for this, the output of the light source needs to be increased. However, there are limitations to increasing the output of the light source due to power consumption issues and user eye safety issues. Summary of the invention

[0007] Technical issues

[0008] The technical objective to be achieved by the present invention is to provide a compact and highly reliable light output device and a three-dimensional sensing device.

[0009] The technical objective to be achieved by the present invention is to provide a light output device and a three-dimensional sensing device capable of adaptively adjusting the viewing angle and the sensing distance.

[0010] The technical objective to be achieved by the present invention is to provide a three-dimensional sensing device that has high depth information resolution and is safe for the user's eyes.

[0011] Technical Solution

[0012] According to an embodiment of the present invention, a light output device includes: a plurality of light source arrays arranged in sequence in a first direction perpendicular to an optical axis direction; a collimating lens arranged above the plurality of light source arrays; and a diffusion member arranged above the collimating lens, wherein each light source array includes a plurality of channels arranged in sequence in a second direction perpendicular to the optical axis direction and the first direction, each of the plurality of light source arrays is configured to be driven independently, and each of the plurality of channels is configured to be driven independently.

[0013] The multiple light source arrays may include a first light source array and a second light source array, each of the first light source array and the second light source array may include a first channel to an nth channel arranged in sequence, and the first channel to the nth channel of the first light source array may be connected in series with the first channel to the nth channel of the second light source array, respectively.

[0014] At least some of the first to n-th channels of the first light source array may be connected in parallel.

[0015] The area of ​​the effective region of the collimating lens may be larger than the area of ​​the plurality of light source arrays.

[0016] The diffusion member may include a first surface disposed to face the plurality of light source arrays and a second surface opposite to the first surface, a plurality of protrusion patterns may be disposed on the first surface, and each of the plurality of protrusion patterns may have a long axis in a direction parallel to the second direction.

[0017] Multiple light source arrays can be implemented on a single chip.

[0018] According to another embodiment of the present invention, a three-dimensional sensing device includes: a light-emitting unit, which generates an output light signal and illuminates a target area using the output light signal; a light-receiving unit, which receives an input light signal reflected from the target area; an information generating unit, which generates information about the target area using the input light signal input to the light-receiving unit; and a control unit, which controls the light-emitting unit, the light-receiving unit and the information generating unit, wherein the light-emitting unit includes: a plurality of light source arrays, which are arranged in sequence in a first direction perpendicular to the optical axis direction; a collimating lens, which is arranged above the plurality of light source arrays; and a diffusion member, which is arranged above the collimating lens, wherein each light source array includes a plurality of channels arranged in sequence in a second direction perpendicular to the optical axis direction and the first direction, each of the plurality of light source arrays is arranged to be driven independently, and each of the plurality of channels is arranged to be driven independently.

[0019] The control unit may control at least one of the number of light source arrays driven among the plurality of light source arrays and the number of channels driven among the plurality of channels.

[0020] The control unit may control the number of the driven light source arrays among the plurality of light source arrays according to the measured distance to the target area.

[0021] The control unit may control the number of driven channels among the plurality of channels according to a desired viewing angle in the second direction.

[0022] The diffusion member may include a first surface disposed to face the plurality of light source arrays and a second surface opposite to the first surface, a plurality of protrusion patterns may be disposed on the first surface, and each of the plurality of protrusion patterns may have a long axis in a direction parallel to the second direction.

[0023] The viewing angle in the first direction may vary according to the shapes of the plurality of protrusion patterns of the diffusion member.

[0024] A three-dimensional sensing device according to another embodiment of the present invention includes: a light emitting unit that generates an output light signal and illuminates a target area using the output light signal; a light receiving unit that receives an input light signal reflected from the target area; an information generating unit that generates information about the target area using the input light signal input to the light receiving unit; and a control unit that controls the light emitting unit, the light receiving unit, and the information generating unit, wherein the light emitting unit includes: a plurality of light source arrays arranged in a matrix form and driven by a plurality of first signal lines and a plurality of second signal lines, an electrical signal is applied in a first direction through the plurality of first signal lines, and an electrical signal is applied in a second direction perpendicular to the first direction through the plurality of second signal lines; a lens group arranged above the plurality of light source arrays; and an optical member arranged above the lens group, wherein the control unit sequentially drives different light source arrays in the plurality of light source arrays using some of the plurality of first signal lines and some of the plurality of second signal lines, and the information generating unit synthesizes the input light signals of the different light source arrays driven sequentially to generate depth information about the target area.

[0025] The optical member may include a diffractive optical element (DOE), and the output light signal is a dot pattern replicated by the diffractive optical element, and the output light signals from different light source arrays driven sequentially may be radiated in the target area without overlapping.

[0026] The control unit may control the number of different light source arrays driven in sequence according to the distance to the target area.

[0027] The lens group may include a collimating lens, and an effective region area of ​​the collimating lens may be larger than an area of ​​the plurality of light source arrays.

[0028] The optical member may include a DOE disposed in a first region of the plurality of light source arrays and a diffusion member disposed in a second region of the plurality of light source arrays.

[0029] The control unit may control the light source array in the first area and the light source array in the second area to be driven in sequence.

[0030] The output light signal output from the light source array in the second region may be a surface pattern diffused by the diffusion member.

[0031] The information generating unit may synthesize input light signals of the light source array in the first area and the light source array in the second area to generate information about the target area.

[0032] Beneficial Effects

[0033] According to an embodiment of the present invention, a compact and highly reliable light output device and a three-dimensional sensing device can be obtained. According to an embodiment of the present invention, a light output device and a three-dimensional sensing device capable of adaptively adjusting a viewing angle and a sensing distance can be obtained. According to an embodiment of the present invention, a light output device and a three-dimensional sensing device capable of adjusting a viewing angle without a scanner (which includes a microelectromechanical system (MEMS), a reflector, etc.) and having a fast response speed and excellent power efficiency can be obtained.

[0034] According to the embodiments of the present invention, a three-dimensional sensing device having high depth information resolution while being safe for the user's eyes can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a block diagram of a three-dimensional sensing device according to an embodiment of the present invention.

[0036] Figure 2 is a conceptual cross-sectional view of a three-dimensional sensing device according to an embodiment of the present invention.

[0037] Figure 3 FIG. 1 is a diagram for describing a corresponding relationship between a plurality of light source arrays and an image sensor included in one embodiment of the present invention.

[0038] Figures 4a to 4c is a perspective view of a diffusion member included in a light emitting unit according to one embodiment of the present invention.

[0039] Figure 5 An example of comparing areas of a plurality of light source arrays and lens groups according to an embodiment of the present invention is shown.

[0040] Figure 6 a shows the result of simulating the viewing angle in the second direction when the twenty-sixth channel to the thirty-first channel among the first channel to the fifty-sixth channel are driven, Figure 6 b shows the result of simulating the viewing angle in the second direction when all of the first to fifty-sixth channels are driven.

[0041] Figure 7 The result of simulating output according to the number of driven light source arrays among a plurality of light source arrays according to an embodiment of the present invention is shown.

[0042] Figure 8 is a conceptual diagram of a light source included in another embodiment of the present invention.

[0043] Fig. 9 is a layout diagram of a light source according to another embodiment of the present invention.

[0044] Fig.10 a to 10g show the Fig. 9Example of a dot pattern output by a light source.

[0045] Fig.11 is a view describing the principle of generating depth information using a dot pattern.

[0046] Fig.12 Yes Fig. 9 A cross-sectional view of a light emitting unit of a light source.

[0047] Fig.13 Shown include Fig.12 An application example of a three-dimensional sensing device of a light-emitting unit.

[0048] Fig.14 is a layout diagram of a light source according to yet another embodiment of the present invention.

[0049] Fig.15 a to 15d show the Fig.14 Example of a surface pattern output by a light source.

[0050] Fig.16 Yes Fig.14 A cross-sectional view of a light emitting unit of a light source.

[0051] FIG. 17 shows Fig.16 An example of a diffusion member included in a light emitting unit.

[0052] Fig.18 Shown include Fig.16 An application example of a three-dimensional sensing device of a light-emitting unit.

[0053] Fig.19 is an exploded view of a LiDAR device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0055] However, the technical spirit of the present invention is not limited to the described embodiments, but can be implemented in various forms, and one or more of the components in the embodiments can be used by selective coupling or replacement without departing from the scope of the technical spirit of the present invention.

[0056] In addition, unless explicitly and specifically defined and described, the terms (including technical terms and scientific terms) used in the embodiments of the present invention may be interpreted as the meanings commonly understood by technicians in the field to which the present invention belongs, and the meanings of general terms such as terms defined in dictionaries may be interpreted in consideration of the contextual meanings of the relevant technology.

[0057] Furthermore, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

[0058] In this specification, the singular form may include the plural form unless the context clearly indicates otherwise, and when describing "at least one (or one or more) of A, B and C", it may include one or more of all possible combinations of A, B and C.

[0059] Furthermore, terms such as “first,” “second,” “A,” “B,” “(a),” and “(b)” may be used to describe components of embodiments of the present invention.

[0060] These terms are used only to distinguish one component from another component, and the nature, sequence, order, etc. of these components are not limited by these terms.

[0061] In addition, when a first component is described as being “connected,” “coupled” or “engaged” to a second component, this may include not only a case where the first component is directly connected, coupled or engaged to the second component, but also a case where the first component is “connected,” “coupled” or “engaged” to the second component via another component present between the first and second components.

[0062] Furthermore, when a first component is described as being formed or disposed “on (above)” or “under (below)” a second component, “on (above)” or “under (below)” may include not only a case where the two components are in direct contact with each other, but also a case where one or more other components are formed or disposed between the two components. Furthermore, when expressed as “on (above)” or “under (below)”, this may include not only a meaning based on an upward direction of one component, but also a meaning based on a downward direction of one component.

[0063] The three-dimensional sensing device according to an embodiment of the present invention may be a LiDAR device installed on a vehicle for measuring the distance between the vehicle and an object, but the present invention is not limited thereto. The three-dimensional sensing device according to an embodiment of the present invention may extract depth information using the time of flight (ToF) principle, the frequency modulated continuous wave (FMCW) principle, or the structured light principle. In this specification, the three-dimensional sensing device may be referred to as a LiDAR device, an information generating device, a depth information generating device, or a camera device.

[0064] Figure 1 is a block diagram of a three-dimensional sensing device according to an embodiment of the present invention, Figure 2 is a conceptual cross-sectional view of a three-dimensional sensing device according to an embodiment of the present invention, Figure 3is a diagram for describing a corresponding relationship between a plurality of light source arrays and an image sensor included in one embodiment of the present invention, and Figures 4a to 4c is a perspective view of a diffusion member included in a light emitting unit according to one embodiment of the present invention.

[0065] refer to Figure 1 and Figure 2 , the information generating device 1000 according to the embodiment of the present invention includes a light emitting unit 100 , a light receiving unit 200 , a depth information generating unit 300 , and a control unit 400 .

[0066] The light-emitting unit 100 may generate and output an output light signal in the form of a pulse wave or a continuous wave. The continuous wave may be in the form of a sine wave or a square wave. Since the output light signal is generated in the form of a pulse wave or a continuous wave, the information generating device 1000 may detect a time difference or a phase difference between the output light signal output from the light-emitting unit 100 and the input light signal reflected from the object and then input to the light receiving unit 200. In the present specification, the output light may be light output from the light-emitting unit 100 and incident on the object, and the input light may be light output from the light-emitting unit 100, reaching the object, reflected from the object and input to the light receiving unit 200. In the present specification, the pattern of the output light may be referred to as an emission pattern, and the pattern of the input light may be referred to as an incident pattern. From the perspective of the object, the output light may be incident light, and the input light may be reflected light.

[0067] The light emitting unit 100 may include a light source 110, a lens group 120 disposed above the light source 110, and an optical member 130 disposed above the lens group 120. The light source 110 generates and outputs light. The light generated by the light source 110 may be infrared light with a wavelength in the range of 770 to 3000 nm. Alternatively, the light generated by the light source 110 may be visible light with a wavelength in the range of 380 to 770 nm. A light emitting diode (LED) may be used as the light source 110, and the light source 110 may have a form in which a plurality of light emitting diodes are arranged in a specific pattern. In addition, the light source 110 may include an organic light emitting diode (OLED) or a laser diode (LD). Alternatively, the light source 110 may be a vertical cavity surface emitting laser (VCSEL). VCSEL is a type of laser diode that converts an electrical signal into an optical signal and can output a signal with a wavelength in the range of about 800 to 1000 nm (e.g., a wavelength in the range of about 850 nm or about 940 nm). The light source 110 is repeatedly turned on / off at fixed time intervals and generates an output optical signal in the form of a pulse wave or a continuous wave. The time interval may be the frequency of the output optical signal.

[0068] The lens group 120 may collect light output from the light source 110 and output the collected light to the outside. The lens group 120 may be disposed separately from the upper portion of the light source 110 relative to the light source 110. Here, the upper portion of the light source 110 may be a side where light is output from the light source 110. The lens group 120 may include at least one lens. When the lens group 120 includes a plurality of lenses, the lenses may be aligned relative to a central axis to form an optical system. Here, the central axis may be the same as the optical axis of the optical system. According to an embodiment of the present invention, the lens group 120 may include a collimating lens.

[0069] The optical member 130 may receive light output from the light source 110 and the lens group 120, and then refract or diffract the received light to output the refracted or diffracted light. Therefore, the optical member 130 may be referred to as a diffusion member.

[0070] The light receiving unit 200 may receive an optical signal reflected from an object. In this case, the received optical signal may be an optical signal output by the light emitting unit 100 and reflected from the object.

[0071] The light receiving unit 200 may include an image sensor 210, an optical filter 220 disposed above the image sensor 210, and a lens group 230 disposed above the optical filter 220. The light signal reflected from the object may pass through the lens group 230. The optical axis of the lens group 230 may be aligned with the optical axis of the image sensor 210. The optical filter 220 may be disposed between the lens group 230 and the image sensor 210. The optical filter 220 may be disposed on the optical path between the object and the image sensor 210. The optical filter 220 may filter light within a predetermined wavelength band. The optical filter 220 may transmit light within a specific wavelength band. The optical filter 220 may allow light having a specific wavelength to pass. For example, the optical filter 220 may allow light within an infrared band to pass while blocking light outside the infrared band. The image sensor 210 may detect light. The image sensor 210 may receive an optical signal. The image sensor 210 may detect the optical signal and output the detected optical signal as an electrical signal. The image sensor 210 may detect light having a wavelength corresponding to the wavelength of light output by the light source 110. For example, the image sensor 210 may detect light in an infrared band.

[0072] The image sensor 210 may be formed into a structure in which a plurality of pixels are arranged in a grid form. The image sensor 210 may be a complementary metal oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD) image sensor. In addition, the image sensor 210 may include a ToF sensor that receives infrared (IR) light reflected from an object and measures a distance using a time difference or a phase difference.

[0073] The light receiving unit 200 and the light emitting unit 100 may be disposed side by side. The light receiving unit 200 may be disposed next to the light emitting unit 100. The light receiving unit 200 may be disposed in the same direction as the light emitting unit 100.

[0074] The information generating unit 300 may generate depth information about the object using the input light signal input to the light receiving unit 200. For example, the information generating unit 300 may calculate the depth information about the object using the flight time taken for the output light signal output from the light emitting unit 100 to be reflected from the object and then input to the light receiving unit 200. For example, the information generating unit 300 may calculate the time difference between the output light signal and the input light signal using the electrical signal received by the image sensor 210, and calculate the distance between the object and the three-dimensional sensing device 1000 using the calculated time difference. For example, the information generating unit 300 may calculate the phase difference between the output light signal and the input light signal using the electrical signal received from the sensor, and calculate the distance between the object and the three-dimensional sensing device 1000 using the calculated phase difference.

[0075] The control unit 400 controls the operation of the light emitting unit 100, the light receiving unit 200, and the information generating unit 300. The information generating unit 300 and the control unit 400 may be implemented in the form of a printed circuit board (PCB). In addition, the information generating unit 300 and the control unit 400 may be implemented in the form of another configuration. Alternatively, the control unit 400 may be included in a terminal or a vehicle provided with the three-dimensional sensing device 1000 according to an embodiment of the present invention. For example, the control unit 400 may be implemented in the form of an application processor (AP) of a smartphone equipped with the three-dimensional sensing device 1000 according to an embodiment of the present invention, or in the form of an electronic control unit (ECU) of a vehicle equipped with the three-dimensional sensing device 1000 according to an embodiment of the present invention.

[0076] The three-dimensional sensing device 1000 according to an embodiment of the present invention may be a solid-state LiDAR. Since the solid-state LiDAR does not include mechanical components for rotating the LiDAR device 1000, unlike the mechanical LiDAR that rotates 360°, the solid-state LiDAR has the advantages of being inexpensive and implemented in a compact form. The three-dimensional sensing device 1000 according to an embodiment of the present invention may be a solid-state flash LiDAR. The solid-state flash LiDAR uses an optical flash, and a single large-area laser pulse can illuminate the environment ahead. However, when implementing high-power long-distance sensing, a scanner may be required, but when the three-dimensional sensing device 1000 includes a scanner, the size of the device may increase, and the reliability and response speed may decrease.

[0077] According to an embodiment of the present invention, an array of addressable light sources is intended to be used to control viewing angle and sensing distance.

[0078] refer to Figure 3 The light source 110 includes a plurality of light source arrays 110-1, 110-2, 110-3 and 110-4 arranged in sequence in a first direction perpendicular to the optical axis direction. For ease of description, the number of the plurality of light source arrays is shown to be four, but the present invention is not limited thereto, and the number of the plurality of light source arrays may be two or more.

[0079] According to an embodiment of the present invention, the first light source array 110 - 1 , the second light source array 110 - 2 , the third light source array 110 - 3 , and the fourth light source array 110 - 4 may be VCSELs implemented on one chip.

[0080] The first light source array 110-1, the second light source array 110-2, the third light source array 110-3 and the fourth light source array 110-4 may be spaced apart from each other. The spacing distance between two adjacent light source arrays may be in the range of 10 μm to 100 μm, preferably in the range of 20 μm to 80 μm, and more preferably in the range of 30 μm to 60 μm.

[0081] According to an embodiment of the present invention, each of the first light source array 110 - 1 , the second light source array 110 - 2 , the third light source array 110 - 3 , and the fourth light source array 110 - 4 may be configured to be independently driven.

[0082] According to an embodiment of the present invention, each light source array 110-1, 110-2, 110-3 or 110-4 includes a plurality of channels CH1, CH2, ..., CHN, which are sequentially arranged in a second direction perpendicular to the optical axis direction and the first direction. Pads may be provided at both ends of each channel for electrical connection. Each of the plurality of channels CH1, CH2, ..., CHN may be arranged to be driven independently. Here, each light source array is shown as including fifty-six channels, but the present invention is not limited thereto.

[0083] Thus, the light source 110 according to an embodiment of the present invention includes a plurality of light source arrays, each of which is configured to be driven independently, and each of the plurality of channels included in each light source array can be configured to be driven independently. Therefore, the light source array can be referred to as an addressable light source array or an addressable VCSEL array.

[0084] The output light signals output from at least some of the first channel of the first light source array 110-1, the first channel of the second light source array 110-2, the first channel of the third light source array 110-3, and the first channel of the fourth light source array 110-4 may be received by the first pixel line portion of the image sensor 210 after being reflected from the target area. The output light signals output from at least some of the second channel of the first light source array 110-1, the second channel of the second light source array 110-2, the second channel of the third light source array 110-3, and the second channel of the fourth light source array 110-4 may be received by the second pixel line portion of the image sensor 210 after being reflected from the target area. Similarly, the output light signals output from at least some of the N-1th channel of the first light source array 110-1, the N-1th channel of the second light source array 110-2, the N-1th channel of the third light source array 110-3, and the N-1th channel of the fourth light source array 110-4 may be received by the N-1th pixel line portion of the image sensor 210 after being reflected from the target area. In addition, the output light signals output from at least some of the Nth channel of the first light source array 110-1, the Nth channel of the second light source array 110-2, the Nth channel of the third light source array 110-3, and the Nth channel of the fourth light source array 110-4 can be received by the Nth pixel line portion of the image sensor 210 after being reflected from the target area. For example, when each light source array includes fifty-six channels, the image sensor 210 includes 597×165 pixels, and each pixel line portion includes 3 pixel lines, the fifty-six channels can be matched to the fifty-six pixel line portions one by one. The image sensor 210 can perform line scanning sequentially from the first pixel line portion to the Nth pixel line portion.

[0085] In this case, at least some of the first channel of the first light source array 110-1, the first channel of the second light source array 110-2, the first channel of the third light source array 110-3, and the first channel of the fourth light source array 110-4 may be connected in series. At least some of the second channel of the first light source array 110-1, the second channel of the second light source array 110-2, the second channel of the third light source array 110-3, and the second channel of the fourth light source array 110-4 may be connected in series. Similarly, at least some of the N-1th channel of the first light source array 110-1, the N-1th channel of the second light source array 110-2, the N-1th channel of the third light source array 110-3, and the N-1th channel of the fourth light source array 110-4 may be connected in series. In addition, at least some of the Nth channel of the first light source array 110-1, the Nth channel of the second light source array 110-2, the Nth channel of the third light source array 110-3, and the Nth channel of the fourth light source array 110-4 may be connected in series.

[0086] Thus, when multiple light source arrays connected in series for each channel are driven simultaneously, high output operation can be performed, and long-distance sensing can be performed. For example, in the case where each light source array outputs 150W per channel, when four light source arrays are driven simultaneously, 600W per channel can be output, enabling long-distance sensing compared to when a single light source array is driven.

[0087] According to an embodiment of the present invention, the control unit 400 may control the number of driven light source arrays in a plurality of light source arrays. For example, the control unit 400 may control the number of driven light source arrays in a plurality of light source arrays according to the measured distance to the target area. For example, when the three-dimensional sensing device 1000 according to an embodiment of the present invention is applied to a short-distance application, a medium-distance application, or a long-distance application, the number of driven light source arrays may vary according to the distance. For example, the number of driven light source arrays may be controlled to increase as the detected distance becomes longer, and the number of driven light source arrays may be controlled to decrease as the detected distance becomes shorter. For example, when the three-dimensional sensing device 1000 is applied to a long-distance application, all of the first to fourth light source arrays 110-1 to 110-4 may be driven, and when the three-dimensional sensing device 1000 is applied to a short-distance application, only the first light source array 110-1 may be driven.

[0088] Meanwhile, according to an embodiment of the present invention, the lens group 120 may be disposed above the plurality of light source arrays 110 and include a plurality of lenses sequentially disposed in a direction from the optical member 130 toward the plurality of light source arrays 110. For example, the lens group 120 may include five lenses sequentially disposed in a direction from the optical member 130 toward the plurality of light source arrays 110. In this specification, the lens group 120 may be referred to as a collimator because the lens group 120 collects light output from the plurality of light source arrays 110 and outputs the collected light.

[0089] According to an embodiment of the present invention, the lens group 120 may include a first lens 121 and a second lens 122, the first lens 121 being disposed closest to the optical member 130 and having a convex shape on both sides, and the second lens 122 being disposed closest to the first lens 121 and having a concave shape on both sides. According to an embodiment of the present invention, the lens group 120 may further include at least one lens 123 disposed between the second lens 122 and the light source 110. In this case, the diameter or effective diameter of each of the first lens 121 and the second lens 122 may be smaller than the diameter or effective diameter of at least one lens 123.

[0090] According to an embodiment of the present invention, the first lens 121 and the second lens 122 are used to collect light output from the plurality of light source arrays 110 , and the at least one lens 123 is used to correct chromatic aberration.

[0091] According to an embodiment of the present invention, the optical member 130 may be disposed above the lens group 120. Here, the optical member 130 may be referred to as a diffusion member or a diffuser.

[0092] The optical member 130 includes a first surface 130A and a second surface 130B. The first surface 130A is disposed to face the plurality of light source arrays 110, and the second surface 130B is opposite to the first surface 130A. To describe the detailed structures of the first surface 130A and the second surface 130B, Figure 4a A first surface 130A facing downward is shown, Figure 4b It shows that by Figure 4a The optical member is reversed 180 degrees and the first surface 130 faces upward, Figure 4c A plan view of the first surface 130A is shown.

[0093] According to an embodiment of the present invention, a plurality of protruding patterns 131 may be disposed on a first surface 130A of an optical member 130, a second surface 130B of the optical member 130 may be a plane, and each of the plurality of protruding patterns 131 may extend to have a long axis in a direction parallel to the second direction. More specifically, according to an embodiment of the present invention, each of the plurality of protruding patterns 131 may have a semi-cylindrical shape extending in the second direction, and the plurality of protruding patterns 131 may be disposed adjacent to each other in a first direction perpendicular to the second direction.

[0094] According to an embodiment of the present invention, the viewing angle of the plurality of light source arrays 110 in the first direction may be determined by the optical member 130. According to an embodiment of the present invention, the viewing angle in the first direction may be the same regardless of the number of light source arrays driven in the plurality of light source arrays 110. For example, the viewing angle of the plurality of light source arrays 110 in the first direction according to an embodiment of the present invention may be 120 degrees, but the present invention is not limited thereto.

[0095] According to an embodiment of the present invention, the viewing angles of the plurality of light source arrays 110 in the second direction may be determined by at least one of the number and positions of the channels driven among the plurality of channels included in each light source array 110. For example, the viewing angle in the second direction when all of the plurality of channels included in each light source array are driven may be wider than the viewing angle in the second direction when some of the plurality of channels included in each light source array are driven.

[0096] To this end, at least some of the multiple channels may be connected in parallel. In addition, the area of ​​the effective region of the lens group 120 used as a collimator may be greater than the area of ​​the multiple light source arrays 110. That is, when the lens group 120 is arranged so that the effective region of the lens group 120 used as a collimator covers all of the multiple light source arrays 110, the viewing angle in the second direction may be controlled according to the number of channels driven among the multiple channels.

[0097] Figure 5 An example of comparing areas of a plurality of light source arrays and lens groups according to an embodiment of the present invention is shown.

[0098] Figure 5 An example is shown in which each light source array has an effective size of 1.2 mm in the first direction and an effective size of 7.6 mm in the second direction, and the six light source arrays are spaced 50 μm apart from each other. In this case, when the lens group 120 is set to cover all six light source arrays, the viewing angle in the second direction can be controlled according to the number of channels driven in the multiple channels.

[0099] According to an embodiment of the present invention, the control unit 400 may control at least one of the number and position of the channels driven in the plurality of channels included in each light source array. For example, the control unit may control at least one of the number and position of the channels driven in the plurality of channels according to the position of the target area, the length of the target area in the second direction, etc.

[0100] Table 1 shows the results of simulating the viewing angle in the second direction according to the number of channels driven, Figure 6 a shows the result of simulating the viewing angle in the second direction when the twenty-sixth channel to the thirty-first channel among the first channel to the fifty-sixth channel are driven, Figure 6 b shows the result of simulating the viewing angle in the second direction when all of the first to fifty-sixth channels are driven.

[0101] [Table 1]

[0102]

[0103]

[0104]

[0105] Refer to Table 1 and Figure 6 a and Figure 6 b. It can be seen that the viewing angle in the first direction is constant regardless of the number of channels driven, while the viewing angle in the second direction varies depending on the number of channels driven.

[0106] Figure 7Results of simulating light output power according to the number of driven light source arrays in a plurality of light source arrays according to an embodiment of the present invention are shown.

[0107] refer to Figure 7 , it can be seen that when one light source array, two light source arrays, or three light source arrays are driven, the power of the output light increases as the number of light source arrays increases. Therefore, it can be seen that as the number of driven light sources increases, the possibility of long-distance sensing increases.

[0108] According to another embodiment of the present invention, an array of addressable light sources is used to improve the resolution of depth information.

[0109] refer to Figure 8 The light source 110 includes a plurality of light source arrays 110-1A, 110-1B, ..., 110-4D arranged in a matrix form. For ease of description, the number of the plurality of light source arrays is shown to be sixteen, but the present invention is not limited thereto, and the number of the plurality of light source arrays may be two or more.

[0110] According to an embodiment of the present invention, the plurality of light source arrays 110 - 1A, 110 - 1B, ..., 110 - 4D may be VCSELs implemented on one chip, and therefore, each light source array may be referred to as a sub-VCSEL.

[0111] The plurality of light source arrays 110-1A, 110-1B, ..., 110-4D may be spaced apart from each other. The spacing distance between two adjacent light source arrays may be in the range of 10 μm to 100 μm, preferably in the range of 20 μm to 80 μm, and more preferably in the range of 30 μm to 60 μm.

[0112] According to an embodiment of the present invention, each of the plurality of light source arrays 110-1A, ..., 110-4D can be set to be driven independently. Each of the plurality of light source arrays 110-1A, ..., 110-4D is driven by a plurality of first signal lines and a plurality of second signal lines, through which an electrical signal is applied in a first direction, and through which an electrical signal is applied in a second direction perpendicular to the first direction. For example, in the plurality of light source arrays 110-1A, ..., 110-4D, the negative signal lines of rows A to D and the positive signal lines of the first to fourth columns are set to cross each other, and each of the plurality of light source arrays 110-1A, ..., 110-4D can be driven independently according to the electrical signals applied to the negative signal lines of rows A to D and the positive signal lines of the first to fourth columns.

[0113] For example, when an electrical signal is applied to the positive signal line of the first column and the negative signal line of the A row, the light source array 110-1A may be driven, and when an electrical signal is applied to the positive signal line of the fourth column and the negative signal line of the D row, the light source array 110-4D may be driven.

[0114] In this way, since each of the plurality of light source arrays is configured to be driven independently, the light source 110 according to the embodiment of the present invention may be referred to as an addressable light source array or an addressable VCSEL array.

[0115] According to an embodiment of the present invention, the control unit 400 sequentially drives different light source arrays in the plurality of light source arrays 110-1A, ..., 110-4D according to a combination of some of the plurality of first signal lines and some of the plurality of second signal lines. For example, the control unit 400 may sequentially drive the light source arrays 110-1A, 110-1B, ..., 110-4C, 110-4D. Alternatively, the control unit 400 may sequentially drive some of the plurality of light source arrays 110-1A, ..., 110-4D.

[0116] In addition, the information generation unit 300 synthesizes the input light signals of different light source arrays driven in sequence to generate depth information about the target area. For example, when the light source arrays 110-1A, 110-2B, 110-3C and 110-4D are driven in sequence, the information generation unit 300 can synthesize the input light signal of the light source array 110-1A, the input light signal of the light source array 110-2B, the input light signal of the light source array 110-3C and the input light signal of the light source array 110-4D to generate depth information. The synthesis of the input light signal can be performed using a super-resolution (SR) algorithm or the like. Therefore, since the instantaneous power consumption does not become too high, the power consumption can be reduced, and high depth information resolution can be obtained without harming the user's eyes.

[0117] Here, according to an embodiment of the present invention, the light emitting unit 100 may be a structured light module that outputs a dot pattern.

[0118] Fig. 9 is a layout diagram of a light source according to another embodiment of the present invention, Fig.10 a to 10g show the Fig. 9 Example of a dot pattern output by a light source, Fig.11 is a diagram describing the principle of generating depth information using a dot pattern, Fig.12 Yes Fig. 9 A cross-sectional view of a light emitting unit of a light source. Figures 1 to 8 Duplicate description of the same content.

[0119] refer to Fig. 9The light source 110 includes a first light source array 110 - 11, a second light source array 110 - 21, a third light source array 110 - 12 and a fourth light source array 110 - 22 arranged in a matrix form.

[0120] Fig.10 b shows an example of a dot pattern output when the first light source array 110 - 11 is driven, Fig.10 c shows an example of a dot pattern output when the second light source array 110-21 is driven, Fig.10 d shows an example of a dot pattern output when the third light source array 110-12 is driven, Fig.10 e shows an example of a dot pattern output when the fourth light source array 110-22 is driven. In this way, the dot patterns output from the first light source array 110-11, the second light source array 110-21, the third light source array 110-12 and the fourth light source array 110-22 may not overlap in the target area.

[0121] refer to Fig.11 , the distance between the three-dimensional sensing device 1000 and the object in the target area (object distance, h′) may vary according to the parallax (Δx) between the points forming the dot pattern. Therefore, the accuracy of the parallax may affect the accuracy of the depth information. More specifically, the extraction of depth information using the dot pattern may be performed according to the following mathematical expression.

[0122] [Mathematical expression 1]

[0123] b:Δx=h:(h′-h)

[0124] [Mathematical expression 2]

[0125]

[0126] [Mathematical expression 3]

[0127]

[0128] Here, h is the reference distance, h′ is the object distance in the target area, b is the baseline length, and Δx is the parallax.

[0129] Referring to mathematical expressions 1 to 3, it can be seen that the length of the baseline b affects the parallax, and as the field of view (FOV) decreases and the baseline increases, the parallax per unit length of the object distance h' increases. When the object size is less than half of the baseline, the points in the predetermined pattern may exceed the adjacent points by parallax, and the parallax may decrease as the distance of the object in the target area increases. Therefore, in order to calculate accurate depth information, it is necessary to extract the parallax based on the center of the point, and it is important that the points radiated on the object in the target area do not overlap with each other.

[0130] Fig.10 a shows an example of a dot pattern output when the first light source array 110-11, the second light source array 110-21, the third light source array 110-12, and the fourth light source array 110-22 are driven simultaneously, Fig.10 f shows an example of a dot pattern output when the first light source array 110-11 and the fourth light source array 110-22 are driven simultaneously, Fig.10 g shows an example of a dot pattern output when the first light source array 110 - 11 , the second light source array 110 - 21 , and the third light source array 110 - 12 are driven simultaneously.

[0131] from Fig.10 As can be seen from a to 10g, as the number of driven light source arrays increases, the number of points radiated in the target area increases. As the number of points radiated in the target area increases, the amount of depth information can be increased, and thus the resolution of the depth information can be improved. However, since the points radiated on the object are more likely to overlap, it may be difficult to extract accurate parallax.

[0132] In an embodiment of the present invention, the first light source array 110-11, the second light source array 110-21, the third light source array 110-12, and the fourth light source array 110-22 can be driven in sequence, and the input light signal from each light source array can be synthesized. Therefore, since the first light source array 110-11, the second light source array 110-21, the third light source array 110-12, and the fourth light source array 110-22 are driven at the same time, high depth information resolution can be obtained. In addition, since the points of radiation on the object are prevented from overlapping, accurate parallax extraction can be performed. In addition, power consumption can be reduced and no damage to the user's eyes will be caused.

[0133] The first light source array 110 - 11 , the second light source array 110 - 21 , the third light source array 110 - 12 , and the fourth light source array 110 - 22 may be sequentially driven according to a combination of electrical signals applied to the plurality of first signal lines L1 and the plurality of second signal lines L2 .

[0134] Meanwhile, according to an embodiment of the present invention, the lens group 120 and the optical member 130 may be disposed above the first light source array 110-11, the second light source array 110-21, the third light source array 110-12, and the fourth light source array 110-22, as shown in FIG. Figure 2 In this case, the optical member 130 may include Fig.12A diffractive optical element (DOE) is shown, and the DOE can replicate a dot pattern output from each of the first light source array 110-11, the second light source array 110-21, the third light source array 110-12, and the fourth light source array 110-22.

[0135] In this way, when the DOE that replicates the dot pattern is set above the first light source array 110-11, the second light source array 110-21, the third light source array 110-12 and the fourth light source array 110-22, when the first light source array 110-11, the second light source array 110-21, the third light source array 110-12 and the fourth light source array 110-22 that output non-overlapping dot patterns are driven sequentially, the density of dots in the target area can be maximized, thereby improving the spatial resolution.

[0136] Fig.13 Shown include Fig.12 An application example of a three-dimensional sensing device of a light-emitting unit.

[0137] refer to Fig.13 A, the control unit 400 of the three-dimensional sensing device 1000 can control the number of different light source arrays driven in sequence according to the distance to the target area. For example, the control unit 400 of the three-dimensional sensing device 1000 can control the number of light source arrays driven in multiple light source arrays according to the measured distance r to the target area. For example, when the three-dimensional sensing device 1000 according to an embodiment of the present invention is applied to short-distance applications, medium-distance applications, or long-distance applications, the number of light source arrays driven can vary according to the distance. As the distance r from the three-dimensional sensing device 1000 to the target area increases, the area of ​​the target area entering the image sensor 210 increases, and the intensity of the light input to the image sensor 210 decreases inversely proportional to the square of the distance. Therefore, when the number of light source arrays driven for long-distance sensing increases, the point density and light intensity can be kept high even at long distances, thereby obtaining high depth information resolution.

[0138] like Fig.13 B and Fig.13 As shown in Figure 3, when the dot pattern is radiated to a person at a long distance, the dot pattern radiated from light source array #1 and the dot pattern radiated from light source array #2 may not overlap. When light source array #1 and light source array #2 are driven in sequence and the input light signal from light source array #1 and the input light signal from light source array #2 are synthesized, the depth information resolution in long-distance sensing can be further improved.

[0139] According to yet another embodiment of the present invention, the light emitting unit 100 may output both a dot pattern and a surface pattern.

[0140] Fig.14is a layout diagram of a light source according to another embodiment of the present invention, Fig.15 a to 15d show the Fig.14 Example of a surface pattern output by a light source. Fig.16 Yes Fig.14 FIG17 shows a cross-sectional view of a light emitting unit of a light source. Fig.16 An example of a diffusion member included in a light emitting unit. Figures 1 to 13 Regarding the dot pattern, the same contents as those described in reference are omitted. Figures 9 to 13 Duplicate description of the same content.

[0141] refer to Fig.14 , the light source 110 includes a first light source array 110-11, a second light source array 110-21, a third light source array 110-12, a fourth light source array 110-22, a fifth light source array 110-31, a sixth light source array 110-41, a seventh light source array 110-32 and an eighth light source array 110-42 arranged in a matrix form. The first light source array 110-11, the second light source array 110-21, the third light source array 110-12 and the fourth light source array 110-22 are reference Figures 9 to 12 The first to fourth light source arrays are described above, and thus repeated descriptions thereof are omitted.

[0142] Fig.15 a shows an example of a surface pattern output when the fifth light source array 110-31, the sixth light source array 110-41, the seventh light source array 110-32, and the eighth light source array 110-42 are all driven, Fig.15 b shows an example of a surface pattern output when the fifth light source array 110-31 and the seventh light source array 110-32 are driven at the same time or the sixth light source array 110-41 and the eighth light source array 110-42 are driven at the same time, Fig.15 c shows an example of a surface pattern output when the fifth light source array 110-31 and the sixth light source array 110-41 are driven simultaneously, and Fig.15 d shows an example of a surface pattern output when the seventh light source array 110-32 and the eighth light source array 110-42 are driven simultaneously. All or some of the fifth light source array 110-31, the sixth light source array 110-41, the seventh light source array 110-32, and the eighth light source array 110-42 may be driven according to a combination of electrical signals applied to the plurality of first signal lines L1 and the plurality of second signal lines L2.

[0143] For this reason, Fig.16As shown, the optical component 130 disposed above the first light source array 110-11, the second light source array 110-21, the third light source array 110-12 and the fourth light source array 110-22 in the first area may be a DOE 1301, and the optical component 130 disposed above the fifth light source array 110-31, the sixth light source array 110-41, the seventh light source array 110-32 and the eighth light source array 110-42 in the second area may be a diffusion component 1302.

[0144] In addition, the lens group 120 may be disposed above the plurality of light source arrays and include a plurality of lenses sequentially disposed in a direction from the diffusion member 1302 toward the plurality of light source arrays. For example, the lens group 120 may include five lenses sequentially disposed in a direction from the diffusion member 1302 toward the plurality of light source arrays. In this specification, the lens group 120 may be referred to as a collimator because the lens group 120 collects light output from the plurality of light source arrays and outputs the collected light.

[0145] The lens group 120 may be disposed above the fifth to eighth light source arrays of the output surface pattern and the first to fourth light source arrays of the output point pattern, and collect light output from the first to fourth light source arrays. To this end, the area of ​​the effective region of the lens group 120 may be greater than the area of ​​the first to eighth light source arrays.

[0146] 17, the diffusion member 1302 includes a first surface 1302A and a second surface 1302B opposite to the first surface 1302A, and the first surface 1302A is arranged to face the fifth to eighth light source arrays 110-31, 110-41, 110-32, and 110-42. In order to describe the detailed structure of the first surface 1302A and the second surface 1302B, FIG17A shows the first surface 1302A facing downward, and FIG17B shows the first surface 1302A facing upward by reversing the diffusion member of FIG17A by 180 degrees.

[0147] According to an embodiment of the present invention, a plurality of protruding patterns 1312 may be disposed on a first surface 1302A of a diffusion member 1302, a second surface 1302B of the diffusion member 1302 may be a plane, and each of the plurality of protruding patterns 1312 may extend to have a long axis in a direction parallel to the second direction. More specifically, according to an embodiment of the present invention, each of the plurality of protruding patterns 1312 may have a semi-cylindrical shape extending in the second direction, and the plurality of protruding patterns 1312 may be disposed adjacent to each other in a first direction perpendicular to the second direction.

[0148] According to the embodiment of the present invention, the viewing angles of the fifth to eighth light source arrays 110-31, 110-41, 110-32, 110-42 in the first direction may be determined by the diffusion member 1302, and a surface pattern uniformly distributed in the first direction may be obtained by the diffusion member 1302. According to the embodiment of the present invention, regardless of the number of driven light source arrays in the fifth to eighth light source arrays 110-31, 110-41, 110-32, 110-42, the viewing angles in the first direction may be the same.

[0149] According to an embodiment of the present invention, the viewing angles of the fifth to eighth light source arrays 110-31, 110-41, 110-32, 110-42 in the second direction may be determined by the number or position of the driven light source arrays in the fifth to eighth light source arrays 110-31, 110-41, 110-32, 110-42. Fig.15 c and Fig.15 As shown in d, the viewing angle in the second direction when only the fifth light source array 110-31 and the sixth light source array 110-41 are driven or when only the seventh light source array 110-32 and the eighth light source array 110-42 are driven can be narrower than the viewing angle in the second direction when all of the fifth to eighth light source arrays 110-31, 110-41, 110-32 and 110-42 are driven.

[0150] Fig.18 Shown include Fig.16 An application example of a three-dimensional sensing device of a light-emitting unit.

[0151] refer to Fig.18 A, the control unit 400 of the three-dimensional sensing device 1000 can control at least one of the number and type of different light source arrays driven in sequence according to the distance r to the target area. For example, the control unit 400 can control at least one of the number and type of light source arrays driven in multiple light source arrays according to the measured distance to the target area. For example, when the three-dimensional sensing device 1000 according to an embodiment of the present invention is applied to short-distance applications, medium-distance applications, or long-distance applications, at least one of the number and type of light source arrays driven may vary according to the distance.

[0152] like Fig.18 As shown in B to 18E, in the case where a dot pattern is radiated onto a person at a long distance, when light source arrays #1 and #2 that radiate non-overlapping dot patterns and light source arrays #3 and #4 that radiate surface patterns in different areas are driven sequentially and the input light signals from light source arrays #1 to #4 are synthesized, the depth information resolution in long-distance sensing can be further improved.

[0153] Fig.19 is an exploded view of a LiDAR device according to an embodiment of the present invention.

[0154] The LiDAR device may include a light emitting unit and a light receiving unit. Since components such as the substrate 10, the bracket 30, and the shielding cover 50 are formed integrally and used in common for the light emitting unit and the light receiving unit, it may be difficult to distinguish between the light emitting unit and the light receiving unit. In this case, each of the above components can be understood as a component of each of the light emitting unit and the light receiving unit. However, as a modified example, common components such as the substrate 10, the bracket 30, and the shielding cover 50 may be provided for the light emitting unit and the light receiving unit, respectively.

[0155] The light emitting unit may include a substrate 10, a light source 20, a bracket 30, a diffusion member 41, a diffusion ring 42 and a shield 50. The light receiving unit may include a substrate 10, a sensor 60, a filter 80, a bracket 30, a lens 70, a barrel 71 and a shield 50.

[0156] The substrate 10 may include a PCB. The substrate 10 may be connected to a connector via a flexible PCB (FPCB) 91. The substrate 10 and the FPCB 91 may be formed as a rigid flexible PCB (RFPCB). The light source 20 and the sensor 60 may be disposed on the substrate 10. The substrate 10 may be disposed below the bracket 30. The substrate 10 may include a terminal. The terminal of the substrate 10 may be coupled to a coupling portion of the shielding case 50. The terminal of the substrate 10 may include a plurality of terminals. The terminal of the substrate 10 may include two terminals.

[0157] The light source 20 may be disposed above the substrate 10. The light source 20 may be disposed in contact with the substrate 10. The light source 20 may be disposed above the substrate 10. The light source 20 may be disposed on the substrate 10. The light source 20 may correspond to the light source 110 described above.

[0158] The bracket 30 may be disposed above the substrate 10. The bracket 30 may be disposed in contact with the substrate 10. The bracket 30 may be disposed above the substrate 10. The bracket 30 may be disposed on the substrate 10. The bracket 30 may be fixed to the substrate 10 using an adhesive. The bracket 30 may accommodate the light source 20, the diffuser module 40, the sensor 60, and the filter 80 therein. The bracket 30 may be a plastic injection molded product. The bracket 30 may be formed by injection molding.

[0159] The diffuser module 40 may include a diffuser member 41 and a diffuser ring 42. The diffuser module 40 may be integrally formed as in the modified example, but in the present embodiment, the diffuser module may be manufactured separately as the diffuser member 41 and the diffuser ring 42 to improve moldability during injection molding. The diffuser member 41 and the diffuser ring 42 may be separate from each other.

[0160] The diffusion member 41 may be a diffuser lens. The diffusion member 41 may correspond to the diffusion member 120 and the diffusion member 400 described above. The diffusion member 41 may be disposed in the bracket 30. The diffusion member 41 may be coupled to the bracket 30. The diffusion member 41 may be fixed to the bracket 30. The diffusion member 41 may be disposed on the optical path of the light emitted from the light source 20. The diffusion member 41 may be disposed above the light source 20. The diffusion member 41 may be disposed above the light source 20. The diffusion member 41 may be a plastic injection molded product. The diffusion member 41 may be formed by plastic injection molding. The height of the top of the diffusion member 41 may correspond to the height of the top of the lens 70. The diffusion member 41 may be inserted into the bracket 30 in the upward direction of the vertical direction and combined with the bracket 30. In this case, the upward direction may be a direction from the lower part of the bracket 30 toward the upper part of the bracket 30. A portion of the diffusion member 41 may overlap with the bracket 30 in the upward direction.

[0161] The diffuser ring 42 may be disposed in the bracket 30. The diffuser ring 42 may be fixed to the bracket 30. The diffuser ring 42 may be coupled to the bracket 30. The diffuser ring 42 may be disposed below the diffuser member 41. The diffuser ring 42 may support the diffuser member 41. The diffuser ring 42 may contact the diffuser member 41. The diffuser ring 42 may be a plastic injection molded product. The diffuser ring 42 may be formed by plastic injection molding.

[0162] The shielding cover 50 may cover the main body of the bracket 30. The shielding cover 50 may include a cover. The shielding cover 50 may include a cover. The shielding cover 50 may be non-magnetic. The shielding cover 50 may be formed of a metal material. The shielding cover 50 may be formed of a metal plate. The shielding cover 50 may be electrically connected to the substrate 10. The shielding cover 50 may be connected to the substrate 10 via solder balls. In this way, the shielding cover 50 may be grounded. The shielding cover 50 may block electromagnetic interference (EMI). In this case, the shielding cover 500 may be referred to as an "EMI shielding cover". Since high voltage is used in the optical device, EMI may increase. In the present embodiment, the shielding cover 50 may block EMI.

[0163] The sensor 60 may be disposed on the substrate 10. The sensor 60 may be disposed on the other side of the partition wall of the bracket 30 on the substrate 10. That is, the sensor 60 may be disposed on the side opposite to the light source 20 based on the partition wall of the bracket 30. The sensor 60 may detect infrared rays. The sensor 60 may detect light having a specific wavelength in the infrared rays. The sensor 60 may detect light passing through the filter 80. The sensor 60 may detect light within the wavelength band of the light source 20. In this way, the sensor 60 may detect light emitted from the light source 20 and reflected by the object, thereby sensing three-dimensional image information about the object. The effective sensing area of ​​the sensor 60 is set to correspond to the diffusion member 41, but the sensor 60 may be set to be biased toward the partition wall as a whole. The circuit pattern of the sensor 60, etc. may be set in the portion of the sensor 60 that is biased toward the partition wall.

[0164] The lens 70 may be fixed in the lens barrel 71. The lens 70 may be a plastic injection molded product. The lens 70 may be formed by plastic injection molding. The lens 70 may include a plurality of lenses.

[0165] The optical filter 80 may be disposed between the lens 70 and the sensor 60. The optical filter 80 may be a bandpass filter that allows light having a specific wavelength to pass through. The optical filter 80 may allow infrared rays to pass through. The optical filter 80 may allow light having a specific wavelength in the infrared rays to pass through. The optical filter 80 may allow light in a wavelength band emitted from the light source 20 to pass through. The optical filter 80 may block visible light. The optical filter 80 may be coupled to the bracket 30. A groove having a size corresponding to that of the optical filter 80 is formed in the bracket 30, and the optical filter 80 may be inserted into the groove and fixed to the groove with an adhesive. An adhesive injection groove such as an adhesive may be formed in the groove of the bracket 30 for use between the optical filter 80 and the bracket 30. The optical filter 80 may be disposed at a position lower than that of the diffuser ring 42.

[0166] Although the above description has been made with reference to the embodiments, the embodiments are only examples and do not limit the present invention, and those skilled in the art to which the present invention belongs will understand that various modifications and applications not illustrated above are possible without departing from the essential features of the present embodiments. For example, each component specifically shown in the embodiments can be implemented by modification. In addition, the differences associated with these modifications and applications should be understood to be included within the scope of the present invention defined in the appended claims.

Claims

1. A light output device, include: A plurality of light source arrays are arranged in sequence in a first direction perpendicular to the optical axis direction; A collimating lens, disposed on the plurality of light source arrays; as well as a diffusion member, disposed on the collimating lens, Each light source array includes a plurality of channels arranged sequentially in a second direction perpendicular to the optical axis direction and the first direction. Each of the plurality of light source arrays is configured to be driven independently, and Each of the plurality of channels is configured to be driven independently.

2. The light output device according to claim 1, in, The plurality of light source arrays include a first light source array and a second light source array, Each of the first light source array and the second light source array includes a first channel to an nth channel arranged in sequence, and The first channel to the nth channel of the first light source array are respectively connected in series to the first channel to the nth channel of the second light source array.

3. The light output device according to claim 2, in, At least some of the first to n-th channels of the first light source array are connected in parallel.

4. The light output device according to claim 1, in, The effective area of ​​the collimating lens is larger than the areas of the plurality of light source arrays.

5. The light output device according to claim 1, in, The diffusion member includes a first surface disposed to face the plurality of light source arrays and a second surface opposite to the first surface, a plurality of protrusion patterns being disposed on the first surface, and each of the plurality of protrusion patterns having a long axis in a direction parallel to the second direction.

6. The light output device according to claim 1, in, The multiple light source arrays are implemented on a single chip.

7. A three-dimensional sensing device, include: a light emitting unit, generating an output light signal, and illuminating a target area with the output light signal; a light receiving unit, receiving an input light signal input after being reflected from the target area; an information generating unit that generates information about the target area using the input light signal input to the light receiving unit; as well as a control unit, controlling the light emitting unit, the light receiving unit and the information generating unit, Wherein, the light emitting unit comprises: A plurality of light source arrays are arranged in sequence in a first direction perpendicular to the optical axis direction; a collimating lens, disposed on the plurality of light source arrays; and a diffusion member, disposed on the collimating lens, Each light source array includes a plurality of channels arranged sequentially in a second direction perpendicular to the optical axis direction and the first direction. Each of the plurality of light source arrays is configured to be driven independently, and Each of the plurality of channels is configured to be driven independently.

8. The three-dimensional sensing device according to claim 7, in, The control unit controls at least one of the number of light source arrays that are driven among the plurality of light source arrays and the number of channels that are driven among the plurality of channels.

9. The three-dimensional sensing device according to claim 8, in, The control unit controls the number of driven light source arrays among the plurality of light source arrays according to the measured distance to the target area.

10. The three-dimensional sensing device according to claim 8, in, The control unit controls the number of channels to be driven among the plurality of channels according to a desired viewing angle in the second direction.

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