KR20200113438A - Camera module - Google Patents

Abstract

According to an embodiment, a camera module is disclosed. The camera module includes: a substrate; a light emitting part disposed on the substrate, and including a first light emitting part and a second light emitting part outputting light to an object and having different fields of illumination (FOI); and a light receiving part disposed on the substrate, and receiving the light reflected from the object and generating an electric signal from the received light. A virtual line connecting the center of the first light emitting part with the center of the second light emitting part is disposed in order not to be overlapped with the light receiving part. Therefore, the present invention is capable of securing an object recognition rate, which is performance in both long and short ranges.

Description

Camera module {CAMERA MODULE}

The embodiment relates to a camera module capable of securing both near-field and far-field performance.

3D content is applied in many fields such as education, manufacturing, and autonomous driving, as well as games and culture, and depth map is required to obtain 3D content. Depth information is information representing a distance in space, and represents perspective information of another point with respect to one point of a 2D image.

As a method of obtaining depth information, a method of projecting infrared (IR) structured light onto an object, a method of using a stereo camera, a method of using a time of flight (TOF), and the like are used. According to the TOF method, the distance to the object is calculated by measuring the flight time, that is, the time that light is emitted and reflected. The biggest advantage of the ToF method is that it provides fast, real-time distance information for 3D space. In addition, users can obtain accurate distance information without applying a separate algorithm or performing hardware correction. In addition, accurate depth information can be obtained by measuring a very close subject or measuring a moving subject.

In the mobile device to which the TOF function is applied, the distance to be recognized may vary depending on the situation, but there is a limit in responding to the distance to be recognized according to the situation. That is, the closer the distance between the mobile device to which the TOF function is applied and the object, the more saturated the light may be. Conversely, as the distance increases, the amount of light decreases and the recognition rate for the object may decrease.

The embodiment may provide a camera module capable of securing both near-field and far-field performance.

A camera module according to an embodiment of the present invention includes a substrate; A light emitting unit disposed on the substrate, outputting light to an object, and including a first light emitting unit and a second light emitting unit having different field of illumination (FOI); And a light-receiving unit disposed on the substrate and configured to receive light reflected from the object and generate an electric signal from the received light, and connect a center of the first light-emitting unit and a center of the second light-emitting unit. May be disposed so as not to overlap with the light receiving unit.

A camera module according to an embodiment of the present invention includes a substrate; A light-emitting unit disposed on the substrate and outputting light to an object and including a first light-emitting unit and a second light-emitting unit having different field of illumination (FOI); And a light receiving unit disposed on the substrate and receiving light reflected from the object and generating an electric signal from the received light, and a virtual line connecting a center of the first light-emitting unit and a center of the second light-emitting unit is It may be disposed to overlap the light receiving unit.

The light-receiving part may be disposed between the first light-emitting part and the second light-emitting part.

The first light emitting part may be disposed between the light receiving part and the second light emitting part.

The FOI of the first light-emitting part may be designed to be larger than the FOI of the second light-emitting part.

The camera module further includes a housing for accommodating the light-emitting part and the light-receiving part, and the upper surface of the housing includes an opening corresponding to each of the light-receiving part, the first light-emitting part, and the second light-emitting part, and the first The size of the opening corresponding to the light emitting part may be different from the size of the opening corresponding to the second light emitting part.

The size of the opening corresponding to the first light emitting part may be larger than the size of the opening corresponding to the second light emitting part.

The FOI of the first light emitting part may be designed to be within 60° to 125°, and the FOI of the second light emitting part may be designed to be within 20° to 45°.

The light emitting unit may include a light source outputting the light; And an optical member that refracts or diffracts the output light and outputs it to the object, and the FOI may be determined by design parameters of the light source and the optical member.

The light source may include a Big Cell or a Vertical Cavity Surface Emitting Laser (VCSEL).

The design parameters of the light source may include a height, a light emitting area, and the number of light emitting elements, and the design parameters of the optical member may include a constituent material, a refractive characteristic, and a diffraction characteristic.

According to the embodiment, since it is possible to selectively drive a plurality of light emitting units having different FOIs, it is possible to secure both performance in a short distance and a long distance, that is, an object recognition rate.

According to the embodiment, a plurality of light emitting units having different FOIs are selectively driven, but a wide recognition distance capable of recognizing various objects may be secured by using the narrow angle light emitting units.

According to the embodiment, a plurality of light emitting units having different FOIs are selectively driven, but precise scanning may be possible even in a short distance using a wide-angle light emitting unit.

1A to 1B are diagrams illustrating a camera module according to an embodiment of the present invention.
2 is a cross-sectional view of a light emitting unit according to an embodiment of the present invention.
3 is a cross-sectional view of a light receiving unit according to an embodiment of the present invention.
4A to 4B are diagrams illustrating a first arrangement form of a light emitting unit according to an exemplary embodiment of the present invention.
5A to 5B are views showing a second arrangement form of a light emitting unit according to an exemplary embodiment of the present invention.
6A to 6B are views showing a third arrangement form of a light emitting unit according to an exemplary embodiment of the present invention.
7 is a diagram illustrating a recognition distance by a narrow angle according to an embodiment of the present invention.
8 is a diagram illustrating a recognition distance by a wide angle according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical idea of the present invention is not limited to some embodiments to be described, but may be implemented in various different forms, and within the scope of the technical idea of the present invention, one or more of the constituent elements may be selectively selected between the embodiments. It can be combined with and substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention are generally understood by those of ordinary skill in the art, unless explicitly defined and described. It can be interpreted as a meaning, and terms generally used, such as terms defined in a dictionary, may be interpreted in consideration of the meaning in the context of the related technology.

In addition, terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In the present specification, the singular form may include the plural form unless specifically stated in the phrase, and when described as “at least one (or more than one) of A and (and) B and C”, it is combined with A, B, and C. It may contain one or more of all possible combinations.

In addition, terms such as first, second, A, B, (a), and (b) may be used in describing the constituent elements of the embodiment of the present invention.

These terms are only for distinguishing the component from other components, and are not limited to the nature, order, or order of the component by the term.

And, when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also the component and It may also include the case of being'connected','coupled' or'connected' due to another component between the other components.

In addition, when it is described as being formed or disposed on the “top (top) or bottom (bottom)” of each component, the top (top) or bottom (bottom) is one as well as when the two components are in direct contact with each other. It also includes a case in which the above other component is formed or disposed between the two components. In addition, when expressed as "upper (upper) or lower (lower)", the meaning of not only an upward direction but also a downward direction based on one component may be included.

In the embodiment, a camera module having a new structure is proposed in which a plurality of light emitting units having different field of illumination (FOI) are disposed on at least one side of the light receiving unit to enable selective driving of the plurality of light emitting units. The camera module according to the embodiment may be a depth image including distance information from an object, that is, a Time of Flight (ToF) camera module for extracting depth information.

1A to 1B are diagrams illustrating a camera module according to an embodiment of the present invention.

1A to 1B, a camera module according to an exemplary embodiment of the present invention may include a substrate 10, a light emitting unit 100, and a light receiving unit 200. The light emitting unit 100 includes a light source 120 and an optical member 130, and the light receiving unit 200 includes an image sensor 220 and a lens module 230.

The light emitting unit 100 is disposed in the first area of the substrate 10, and the light receiving unit 200 is disposed in the second area, and the light emitting unit 100 and the light receiving unit 200 are disposed inside the housing 20 and emit light. The optical member 130 of the part 100 and the lens module 230 of the light receiving part 200 may be supported by the holder 30. A light source 120 and an image sensor 220 corresponding to the optical member 130 and the lens module 230, respectively, may be disposed under the holder 30.

The housing 20 accommodates the light emitting unit 100 and the light receiving unit 200, and the upper surface of the housing 20 includes openings 22, 23 and 21 corresponding to the light emitting unit 100 and the light receiving unit 200, respectively. can do. In the embodiment, the light emitting unit 100 includes a first light emitting unit and a second light emitting unit having different FOIs, and the housing 20 has an opening corresponding to each of the first light emitting unit, the second light emitting unit, and the light receiving unit 200 (22, 23, 21) may be included. In this case, the opening 22 corresponding to the first light emitting part and the opening 23 corresponding to the second light emitting part may be different, and the opening 22 corresponding to the first light emitting part may correspond to the second light emitting part. The size of the opening 23 may be larger than the size of the opening 23 or the opening 23 corresponding to the second light emitting part may be larger than the size of the opening 22 corresponding to the first light emitting part. Of course, the opening 22 corresponding to the first light emitting part and the opening 23 corresponding to the second light emitting part may be the same.

The substrate 10 is a structure on which the light emitting unit 100 and the light receiving unit 200 are mounted, and may be, for example, a printed circuit board 10. In this case, the printed circuit board 10 refers to a board 10 on which a circuit pattern is formed on the board 10, that is, a printed circuit board (PCB). In addition, the substrate 10 may be formed of a flexible printed circuit board (FPCB) in order to secure a certain flexibility. In addition, the substrate may be implemented with any one of a resin-based printed circuit board (PCB), a metal core PCB, a ceramic PCB, and an FR-4 substrate.

After generating the output light signal, the light emitting unit 100 may irradiate the object. In this case, 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 sinusoid wave or a square wave. By generating the output light signal in the form of a pulse wave or a continuous wave, the camera module detects the time difference or phase difference between the output light signal output from the light emitting unit 100 and the input light signal input to the camera module after being reflected from the object. can do. In this embodiment, the output light means light that is output from the light emitting unit 100 and incident on the object, and the input light is output from the light emitting unit 100 to reach the object and reflect from the object, and then to the light receiving unit 200. It may mean input light. From the object's point of view, the output light may be incident light, and the input light may be reflected light.

The light emitting unit 100 may irradiate the generated output light signal to the object during a predetermined exposure period. Here, the exposure period means one frame period. In the case of generating a plurality of frames, the set exposure period is repeated. For example, when an object is photographed at 20 FPS, the exposure period is 1/20 [sec]. And, when generating 100 frames, the exposure period may be repeated 100 times.

The light emitting unit 100 may generate a plurality of output light signals having different frequencies. In this case, the light emitting unit 100 may sequentially repeatedly generate a plurality of output light signals having different frequencies. Alternatively, the light emitting unit 100 may simultaneously generate a plurality of output light signals having different frequencies.

The light-receiving unit 200 may condense input light reflected by the output light to the object, generate an electric signal from the condensed input light, and generate image data through the generated electric signal.

Here, a case where the light-emitting unit 100 and the light-receiving unit 200 are disposed adjacent to each other on one substrate 10 is described as an example, but is not limited thereto and may be disposed on different substrates 10, and the light-emitting unit The 100 and the light receiving unit 200 may not be disposed adjacent to each other.

2 is a cross-sectional view of a light emitting unit according to an embodiment of the present invention.

Referring to FIG. 2, the light emitting unit 100 according to an embodiment of the present invention may include a substrate 10, a light source 120, and an optical member 130.

The substrate 10 is a structure on which the light source 120 is mounted, and may be, for example, a printed circuit board 10.

The light source 120 outputs light (light). When an electric signal (voltage) is applied, the light source 120 outputs light according to the electric signal.

The light source 120 may be implemented as a light emitting device that emits light. Light-emitting elements include laser diode (LD), vertical-cavity surface-emitting laser (VCSEL), organic light emitting diode (OLED), light emitting diode (LED), It may include a side-emitting laser (Edge Emitter Laser, EEL). According to an embodiment of the present invention, when the light source 120 uses a vertical resonance laser diode as a light emitting device, the manufacturing process can be simplified, miniaturization, and high integration can facilitate parallel signal processing, and power consumption can be reduced. However, it is not necessarily limited thereto.

The light source 120 may be implemented in a form in which a plurality of light emitting devices are arrayed, and may be implemented in the form of a chip in which a plurality of light emitting devices are arrayed. The shape in which the light emitting elements are arranged can be changed in design by a person skilled in the art according to the purpose of the camera module according to the embodiment of the present invention.

In this case, the light-emitting elements constituting the light source may be expressed as an emitter and an aperture, and the number of light-emitting elements may be 250 for output of 1W, for example.

The light source 120 may be disposed on one surface of the printed circuit board 110. The light source 120 may be electrically connected to the printed circuit board 10, and may receive power necessary to output light through the printed circuit board 10.

The optical member 130 may scatter and output light input from the light source 120. The optical member 130 may scatter input light according to a certain scattering pattern. The optical member 130 scatters light, thereby improving uniformity of luminance of light output from the light source 120 and removing a hot spot in which light is concentrated where the light emitting element is located. That is, the optical member 130 may scatter input light and uniformly diffuse the output light over the entire surface. In an embodiment of the present invention, the optical member 130 may be a diffuser, a lens, or the like, which is a member capable of refraction or diffraction of input light.

The optical member 130 is disposed on the front surface of the light source 120. In this case, the front surface of the light source 120 means one surface located in the direction in which light is output from the light source 120. The optical member 130 may be disposed to be spaced apart from the light source 120 by a predetermined distance. The design of the distance between the optical member 130 and the light source 120 can be changed by a person skilled in the art in consideration of the purpose of the camera module and the type and type of the light source 120.

The optical member 130 may be implemented in a plate shape including a first surface to which light is input and a second surface to which scattered light is output. The optical member 130 may be implemented in a spherical or flat surface. Micro lenses are disposed on the first surface of the optical member 130 according to a predetermined pitch. At this time, the input light is scattered and output through the second surface by adjusting the angle of the light collected through the first surface according to the size, curvature, refractive index, and pitch size of the micro lens. The size, curvature, refractive index, and size of the pitch of the microlens consider the use of the camera module according to the embodiment of the present invention, the distance between the optical member 130 and the light source 120, the shape and type of the light source 120, etc. Thus, design changes can be made by those skilled in the art.

3 is a cross-sectional view of a light receiving unit according to an embodiment of the present invention.

Referring to FIG. 3, the light receiving unit 200 according to an embodiment of the present invention may include a substrate 10, an image sensor 220, and a lens module 230. Although not shown here, the light emitting unit 100 of FIG. 1A may be disposed on one side of the image sensor 220 on the printed circuit board 10.

The lens module 230 may include a lens 232, a lens barrel 234, a lens holder 236, and an IR filter 238.

The lens 232 may be composed of a plurality of sheets, or may be composed of one sheet. When the lens 232 is formed of a plurality of lenses, each of the lenses may be aligned with respect 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. Although not shown, the lens 232 may include a variable lens. The variable lens may be a variable focus lens. Also, the variable lens may be a lens whose focus is adjusted. The variable lens may be at least one of a liquid lens, a polymer lens, a liquid crystal lens, a VCM type, and an SMA type. The liquid lens may include a liquid lens including one liquid and a liquid lens including two liquids. A liquid lens containing one liquid may change the focus by adjusting a membrane disposed at a position corresponding to the liquid, and for example, the focus may be changed by pressing the membrane by electromagnetic force of a magnet and a coil. A liquid lens including two liquids may control an interface formed between the conductive liquid and the non-conductive liquid by using a voltage applied to the liquid lens including the conductive liquid and the non-conductive liquid. The polymer lens can change the focus of the polymer material through a driving unit such as piezo. The liquid crystal lens can change the focus by controlling the liquid crystal by electromagnetic force. The VCM type can change the focus by adjusting the solid lens or the lens assembly including the solid lens through the electromagnetic force between the magnet and the coil. The SMA type can change focus by controlling a solid lens or a lens assembly including a solid lens using a shape memory alloy. In addition, the optical unit 120 may include a filter that transmits a specific wavelength region. For example, a filter that transmits a specific wavelength region may include an IR pass filter. In addition, the optical unit 120 may include an optical plate. The optical plate may be a light transmissive plate. The lens 232 may include a variable lens.

The lens barrel 234 is coupled to the lens holder 236, and a space for accommodating a lens may be provided therein. The lens barrel 234 may be rotationally coupled to one or a plurality of lenses, but this is exemplary, and may be coupled in other ways, such as a method using an adhesive (eg, an adhesive resin such as epoxy). .

The lens holder 236 may be coupled to the lens barrel 234 to support the lens barrel 234, and may be coupled to the printed circuit board 210 on which the image sensor 220 is mounted. A space in which the IR filter 238 can be attached may be formed under the lens barrel by the lens holder 236. A helical pattern may be formed on the outer circumferential surface of the lens holder 236, and similarly, the helical pattern may be rotationally coupled to the lens barrel 234 having a helical pattern on the outer circumferential surface. However, this is exemplary, and the lens holder 236 and the lens barrel 234 may be coupled through an adhesive, or the lens holder 236 and the lens barrel 234 may be integrally formed. Here, the IR filter 238 is a filter that passes light in a specific wavelength region, and refers to a filter that passes light in an infrared wavelength region. Although not shown, a driving unit capable of tilting or shifting the IR filter 238 may be disposed in the lens holder 236.

The lens holder 236 may be divided into an upper holder 236-1 coupled to the lens barrel 234 and a lower holder 236-2 coupled to the printed circuit board 210 on which the image sensor 220 is mounted. In addition, the upper holder 236-1 and the lower holder 236-2 may be integrally formed, formed in a structure separated from each other, and then fastened or combined, or may have a structure separated from each other and spaced apart from each other. In this case, the diameter of the upper holder 236-1 may be formed smaller than the diameter of the lower holder 236-2.

The above example is only an embodiment, and the lens module 230 may be configured with another structure capable of condensing an incident input light signal and transmitting it to the image sensor 220.

The image sensor 220 may absorb an input light signal in synchronization with the blinking period of the light emitting unit 100. In more detail, the image sensor 220 may absorb an output light signal output from the light emitting unit 100 and light in phase and out phase, respectively. That is, the image sensor 220 may repeatedly perform the step of absorbing the incident light signal when the light source is turned on and the step of absorbing the incident light signal when the light source is turned off.

The image sensor 220 may generate an electric signal corresponding to each reference signal by using a plurality of reference signals having different phase differences. The frequency of the reference signal may be set equal to the frequency of the output light signal output from the light emitting unit 100. Accordingly, when the light emitting unit 100 generates an output optical signal with a plurality of frequencies, the image sensor 220 generates an electric signal using a plurality of reference signals corresponding to each frequency. The electrical signal may include information on an amount of charge or voltage corresponding to each reference signal.

The image sensor 220 may be configured in a structure in which a plurality of pixels are arranged in a grid form. The image sensor 220 may be, for example, a Complementary Metal Oxide Semiconductor (CMOS) image sensor, or may be a Charge Coupled Device (CCD) image sensor. In addition, the image sensor 220 may include a ToF sensor that receives infrared light reflected from an object and measures a distance using time or phase difference.

The light emitting unit 100 according to the exemplary embodiment of the present invention may be implemented in at least two or more. At least two or more light emitting units 100 may be disposed on at least one side of the light receiving unit 200 to be selectively driven. In the embodiment, a case in which two light-emitting units are disposed is described as an example, but the number of light-emitting units may be changed as necessary.

4A to 4B are diagrams illustrating a first arrangement form of a light emitting unit according to an exemplary embodiment of the present invention.

4A to 4B, the camera module according to the embodiment may include a substrate 10, a light receiving unit 200, and a light emitting unit 100 disposed to be spaced apart from one side of the light receiving unit 200.

The light receiving unit 200 may include a substrate 10, an image sensor 220, and a lens module 230.

A plurality of light-emitting units 100 may be implemented, and may include a first light-emitting unit 100a and a second light-emitting unit 100b. In this case, the first light-emitting part 100a and the second light-emitting part 100b may be spaced apart from one side of the light-receiving part and disposed side by side. The first light-emitting part 100a and the second light-emitting part 100b are designed to have different FOIs.

In other words, a virtual line connecting the center of the first light-emitting unit 100a and the center of the second light-emitting unit 100b may be disposed so as not to overlap with the light-receiving unit 200. Alternatively, the light-emitting unit 100 and the light-receiving unit 200 are disposed in the first axis direction, and the first light-emitting unit 100a and the second light-emitting unit 100b are disposed in a second axis direction perpendicular to the first axis direction. I can. Here, the first axis direction may be the x-axis direction, the second axis direction may be the y-axis direction, or the first axis direction may be the y-axis direction and the second axis direction may be the x-axis direction. Alternatively, the light-emitting unit 100 and the light-receiving unit 200 may be disposed in a horizontal direction, and the first light-emitting unit 100a and the second light-emitting unit 100b may be disposed in a vertical direction.

As an example, the first light-emitting part 100a is designed to enable precise scanning in a short distance, that is, within 1m, and the FOI of the first light-emitting part 100a is 60 degrees or more, which is a wide angle, preferably 60 degrees to It can be within 125 ˚.

As another example, the second light-emitting unit 100b is designed to be used over a long distance, that is, a long distance of 1m or more, and the FOI of the second light-emitting unit 100b is less than 60°, which is a narrow angle, preferably within 20° to 45°. I can. At this time, if the FOI is less than 20˚, light is saturated and the recognition rate is lowered, so 20˚ or more is preferable. If the FOI exceeds 45˚, the light is scattered and the recognition rate is lowered, so 45˚ or less is preferable. Do.

The light emitting unit 100 may include a substrate 10, a light source 120, and an optical member 130. The FOI of the light emitting part may be determined by design parameters of the light source 120 and the optical member 130.

For example, the design parameters of the light source 120 may include a height or a distance from the optical member 130, a light emitting area, and the number of light emitting devices, and the design parameters of the optical member 130 include a constituent material, a refractive characteristic. , Diffraction characteristics, and the like. The design parameters of the light source 120 and the optical member 130 described herein are only examples and are not necessarily limited thereto.

In an embodiment of the present invention, the optical member 130 may be implemented as one optical member, but is not limited thereto and may be implemented as at least two or more optical members.

In the embodiment, one surface of the substrate 10 is divided into one first region and one second region, and in one first region, the first light emitting portion 100a and the second light emitting portion 100b are separated by a predetermined distance. It is spaced apart, and one light-receiving unit 200 may be disposed in one second area.

5A to 5B are views showing a second arrangement form of a light emitting unit according to an exemplary embodiment of the present invention.

5A to 5B, the camera module according to the embodiment may include a substrate 10, one light receiving unit 200, and a light emitting unit 100 disposed to be spaced apart from one side of the light receiving unit 200.

A plurality of light-emitting units 100 may be implemented, and may include a first light-emitting unit 100a and a second light-emitting unit 100b. At this time, the first light-emitting part 100a and the second light-emitting part 100b are sequentially disposed to be spaced apart from one side of the light-receiving part, so that the light-receiving part 200, the first light-emitting part 100a, and the second light-emitting part 100b are It may be a form arranged in sequence on a virtual straight line that forgets each center.

In other words, a virtual line connecting the center of the first light-emitting unit 100a and the center of the second light-emitting unit 100b may be disposed to overlap the light-receiving unit 200. In this case, the first light emitting part 100a may be disposed between the light receiving part 200 and the second light emitting part 100b.

In this case, the FOI of the first light emitting part 100a may be designed to be larger than that of the second light emitting part 100b. For example, the FOI of the first light emitting unit 100a may be within 60° to 125°, and the FOI of the second light emitting unit 100b may be within 20° to 45°.

In addition, the FOI of the first light emitting part 100a may be designed to be smaller than that of the second light emitting part 100b.

As described above, in this embodiment, one surface of the substrate 10 is divided into one first region and one second region, and the first light emitting portion 100a and the second light emitting portion 100b are predetermined in one first region. It is disposed spaced apart from each other, and one light receiving unit 200 may be disposed in one second area.

6A to 6B are views showing a third arrangement form of a light emitting unit according to an exemplary embodiment of the present invention.

6A to 6B, the camera module according to the embodiment may include a substrate 10, one light receiving unit 200, and a light emitting unit 100 disposed to be spaced apart from one side of the light receiving unit 200.

A plurality of light-emitting units 100 may be implemented, and may include a first light-emitting unit 100a and a second light-emitting unit 100b. At this time, the first light-emitting part 100a is disposed to be spaced apart from one side of the light-receiving part 200, and the second light-emitting part 100b is disposed to be spaced apart from the other side of the light-receiving part 200, so that the first light-emitting part 100a, The light receiving unit 200 and the second light emitting unit 100b may be sequentially disposed on a virtual straight line that forgets each center.

In other words, a virtual line connecting the center of the first light-emitting unit 100a and the center of the second light-emitting unit 100b may be disposed to overlap the light-receiving unit 200. In this case, the light-receiving part 200 may be disposed between the first light-emitting part 100a and the second light-emitting part 100b.

In the embodiment, one surface of the substrate 10 is divided into two first regions and one second region, and a first light emitting portion 100a and a second light emitting portion 100b are disposed in the two first regions, respectively. In addition, one light-receiving unit 200 may be disposed in one second area.

7 is a diagram illustrating a recognition distance by a narrow angle according to an embodiment of the present invention.

Referring to FIG. 7, by selectively driving a plurality of light emitting units having different FOIs, but driving light emitting units having a narrow angle, the recognition distance can be increased over a long distance.

Here, since various objects can be sensed over a long distance, a wide recognition distance can be secured.

For example, in a specific space where various objects are arranged according to the distance as in (a), you can sense the object as in (b), and you can know the distance to the recognized object as in (c), and (d) It is shown that synthesis can be performed based on distance information.

8 is a diagram illustrating a recognition distance by a wide angle according to an embodiment of the present invention.

Referring to FIG. 8, by selectively driving a plurality of light-emitting units having different FOIs, but driving a wide-angle light-emitting unit, precise scanning may be possible even in a short distance.

At this time, it is necessary to reduce the amount of light because the light is saturated at a short distance within 1m. For example, it is possible to reduce the amount of light by lowering the light output of the light emitting unit at a short distance.

The term'~ unit' used in this embodiment refers to software or hardware components such as field-programmable gate array (FPGA) or ASIC, and'~ unit' performs certain roles. However,'~ part' is not limited to software or hardware. The'~ unit' may be configured to be in an addressable storage medium, or may be configured to reproduce one or more processors. Thus, as an example,'~ unit' refers to components such as software components, object-oriented software components, class components and task components, processes, functions, properties, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, database, data structures, tables, arrays, and variables. The components and functions provided in the'~ units' may be combined into a smaller number of elements and'~ units', or may be further divided into additional elements and'~ units'. In addition, components and'~ units' may be implemented to play one or more CPUs in a device or a security multimedia card.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. You will understand that you can do it.

10: substrate
100: light emitting unit
120: light source
130: optical member
200: light receiving unit
220: image sensor
230: lens module

Claims (11)

Board;
A light-emitting unit disposed on the substrate and outputting light to an object and including a first light-emitting unit and a second light-emitting unit having different field of illumination (FOI); And
And a light receiving unit disposed on the substrate and receiving light reflected from the object and generating an electric signal from the received light,
A camera module in which a virtual line connecting the center of the first light-emitting part and the center of the second light-emitting part is disposed so as not to overlap with the light-receiving part. Board;
A light-emitting unit disposed on the substrate and outputting light to an object and including a first light-emitting unit and a second light-emitting unit having different field of illumination (FOI); And
And a light receiving unit disposed on the substrate and receiving light reflected from the object and generating an electric signal from the received light,
A camera module wherein a virtual line connecting the center of the first light-emitting part and the center of the second light-emitting part is disposed to overlap the light-receiving part. The method of claim 2,
The camera module is disposed between the light receiving part and the first light-emitting part and the second light-emitting part. The method of claim 2,
The first light emitting part is a camera module disposed between the light receiving part and the second light emitting part. The method according to claim 1 to 4,
The first light-emitting unit FOI is designed to be larger than the second light-emitting unit FOI. The method of claim 5,
Further comprising a housing accommodating the light emitting portion and the light receiving portion,
The upper surface of the housing includes openings corresponding to each of the light receiving part, the first light emitting part, and the second light emitting part,
A camera module in which a size of the opening corresponding to the first light emitting part is different from a size of the opening corresponding to the second light emitting part. The method of claim 6,
A camera module in which a size of an opening corresponding to the first light emitting part is larger than a size of an opening corresponding to the second light emitting part. The method of claim 4,
The first light emitting unit FOI is designed within 60˚ ~ 125˚, the second light emitting unit FOI is designed within 20˚ to 45˚ camera module. The method of claim 4,
The light emitting unit,
A light source that outputs the light; And
Including an optical member that refracts or diffracts the output light and outputs it to the object,
A camera module in which the FOI is determined by design parameters of the light source and the optical member. The method of claim 6,
The light source,
Camera module containing a Vertical Cavity Surface Emitting Laser (VCSEL). The method of claim 9,
The design parameters of the light source include a height, a light emitting area, and the number of light emitting elements,
The design parameter of the optical member includes a constituent material, a refractive property, and a diffraction property.

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