KR20200033168A - Beam projector module providing eye protection - Google Patents

Abstract

One embodiment provides a beam projector module, which comprises: a light source outputting light; a substrate on which the light source is supported; an optical device reducing the intensity of the light output to a certain space with respect to the light; an optical substrate on which the optical device is disposed and which transmits the light; and a frame, which includes a support portion spacing the optical device from the light source at a predetermined distance and supporting the optical substrate. Provided is the beam projector module, in which the optical substrate is slidingly inserted through a first slot formed to penetrate a first side surface of the frame, and is mounted to the frame so that a portion of an upper surface or a lower surface of the optical substrate contacts the support portion.

Description

Beam projector module providing eye protection

This embodiment relates to a beam projector module.

LASER stands for "Light Amplification by Stimulated Emission of Radiation," and can output light intensively and condensedly. In addition, the laser may have monochromaticity and directivity, and due to these characteristics, the laser is widely used in the field of optical sensor technology.

For example, the laser may be used as a light source of a distance measuring device, and may be used as a light source of a 3D depth camera. ToF (Time of Flight) distance measuring device measures the distance traveled by a pulsed light wave reflected from an object and returns to the object through a phase difference, and the distance is measured through the information of the phase difference and frequency. For measurement, a structure light (SL) or hybrid stereo type (SSL) can extract distance information by forming a regular or irregular pattern through a diffuser using a laser light source as a source.

The laser is used as a light source for distance measurement and 3D depth cameras due to its high power and directivity characteristics.

On the other hand, the high power characteristics of the laser can be recognized as an advantage in terms of increasing the flight distance of the light and maintaining the output of the returned light over a certain level, but it can be recognized as a disadvantage in terms of safety. When high-power light is directly irradiated to the human eye, it may damage the eyeball and, in extreme cases, blindness. Accordingly, safety issues should always be considered when using a laser as a light source.

In general, each country has an eye-safety criterion, so the intensity of light output from the device is adjusted below the reference value.

One of the methods of adjusting the intensity of the output light is to arrange a diffuser capable of reducing the intensity of light on the output path of the light. Since the diffuser disperses the concentrated light to the constant field of view (FOV) required by the system using the properties of light and refraction and diffraction by using the properties of light, the intensity of light passing through the diffuser is reduced per unit area.

However, in the apparatus for controlling the intensity of light by using the diffuser in this way, when the diffuser is detached, high output light is output as it is, which may be a safety problem.

Against this background, the purpose of this embodiment is to provide a technique for a beam projector module that provides an eye-safety function.

In order to achieve the above object, an embodiment, a light source for outputting light; A substrate on which the light source is supported; An optical device that reduces the intensity of the light output to a certain space with respect to the light; An optical substrate on which the optical device is disposed and which transmits the light; And a frame which spaces the optical device from the light source at a predetermined distance and supports the optical substrate, wherein the optical substrate is provided through a first slot formed to penetrate the first side of the frame. It provides a beam projector module, which is inserted into the frame so that a part of the upper surface or the lower surface of the optical substrate is in sliding contact with the support part.

In the beam projector module, in the frame, a second slot is formed inside the second side opposite to the first side, and an edge of one side of the optical device penetrating through the first slot is inserted into the second slot Can be inserted in.

In the beam projector module, in the frame, a second slot is formed inside the second side opposite to the first side, and the optical device includes a plurality of regions having different optical characteristics, the first slot and According to the sliding movement of the optical substrate through the second slot, each region having different optical characteristics of the optical device may be disposed above the light source.

In the beam projector module, the first slot may be closed with a sealing member.

In the beam projector module, an outer portion of the first slot and an outer portion of the first side of the frame may be additionally closed by the sealing member.

In the beam projector module, the second slot is formed to penetrate the second side, and the first slot and the second slot may each be closed with a sealing member.

In the beam projector module, in the frame, a third slot is formed to penetrate a third side between the first side and the second side, and the third slot may be closed with a sealing member.

In the beam projector module, in the optical substrate, curved irregularities may be formed on one surface of a portion inserted into the second slot.

In the beam projector module, a wrinkle may be formed on one surface of the second slot so as to correspond to the curved uneven shape.

In the beam projector module, the light source may include a vertical-cavity surface-emitting laser (VCSEL), and the optical device may include a diffuser that disperses the light.

In order to achieve the above object, another embodiment, a light source for outputting light; A substrate on which the light source is supported; An optical device that reduces the intensity of the light output to a certain space with respect to the light; And an optical substrate on which the optical device is disposed and transmits the light. A frame including a first frame portion spaced apart from the light source by a predetermined distance from the light source, and a second frame portion connected to the first frame portion through a junction portion including a conductive material and including a support portion supporting the optical substrate. ; A sensor electrically connected to the conductive junction to measure a resistance value of the junction; And a processor that operates the light source in an eye-safety mode when the resistance value is greater than or equal to a predetermined constant resistance value, so that a portion of the upper or lower surface of the optical substrate is in contact with the support. Provided is a beam projector module mounted on the frame.

In the beam projector module, the conductive material may be conductive epoxy.

In the beam projector module, the light source may include a vertical-cavity surface-emitting laser (VCSEL), and the optical device may include a diffuser that disperses the light.

In the beam projector module, the second frame portion includes a socket formed on a second joint surface that abuts the second frame portion and the joint portion, and the first frame portion comprises a first contact portion between the first frame portion and the joint portion. A structure corresponding to the socket may be formed on one bonding surface.

In the beam projector module, the second frame portion may include one or more of the sockets on a second bonding surface.

In the beam projector module, the first frame portion includes a wiring on a first bonding surface that abuts the first frame portion and the bonding portion, and the second frame portion is a second bonding surface that abuts the second frame portion and the bonding portion. Can include wiring.

In the beam projector module, the sensor may be electrically connected to the junction through a via fill formed inside the first frame portion.

In the beam projector module, the support part may be extended to a predetermined length inside the frame according to a preset angle of view.

In the beam projector module, the optical substrate is slidingly inserted through a first slot formed to penetrate the first side of the second frame, so that a portion of the upper or lower surface of the optical substrate contacts the support portion It can be mounted on a frame.

In the beam projector module, the first bonding surface and the second bonding surface may include curved irregularities.

In the beam projector module, the processor may measure the rate of change of the resistance value and operate the light source in an eye-safety mode when the rate of change is greater than or equal to a predetermined value.

As described above, according to the present embodiment, even when an abnormality occurs in the beam projector module, the user's eyes can be safely protected.

1 is a horizontal cross-sectional view of a beam projector module according to the first embodiment.
2 is a cross-sectional view of the frame according to the first embodiment.
3 is a cross-sectional view of the beam projector module according to the second embodiment.
4 is a cross-sectional view of the frame according to the second embodiment.
5 is a cross-sectional view of a frame according to an embodiment of the specification.
6 is a cross-sectional view of a frame according to an embodiment of the specification.
7 is a cross-sectional view of the beam projector module according to the third embodiment.
8 is an enlarged view of part (B) of FIG. 7.
9A and 9B are cross-sectional views illustrating various sockets of a frame according to an exemplary embodiment of the present specification.
10 is a view showing a case in which an abnormality occurs in the beam projector module according to the third embodiment.
11 is a cross-sectional view of the beam projector module according to the fourth embodiment.
12 is a view for explaining the effect of adjusting the angle of view of the beam projector module according to the fourth embodiment.
13 is a cross-sectional view of the beam projector module according to the fifth embodiment.
14 is a flow chart of a beam projector module according to an embodiment of the specification to change the operation mode according to the resistance value.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known configurations or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should be understood that elements may be "connected", "coupled" or "connected".

1 is a horizontal cross-sectional view of a beam projector module according to the first embodiment.

Referring to FIG. 1, the beam projector module 100 according to the first embodiment may include a light source 110, a substrate 120, an optical device 130, an optical substrate 140, a frame 150, and the like. have.

The light source 110 may be disposed on the substrate 120 and output light. The anode electrode of the light source 110 may be connected to the anode wiring of the substrate 120 and the cathode electrode may be connected to the cathode wiring of the substrate 120.

The light source 110 may be disposed connected to the substrate 120 in a wire bonding form. Alternatively, the light source 110 may be disposed without wires on the substrate 120 in a flip chip bonding method. When the light source 110 is connected to the substrate 120 through flip chip bonding, a wire line is not required, and accordingly, a smaller beam projector module can be configured.

Further, the light source 110 is not limited as long as it is a light source capable of outputting light such as a laser, but the light source 110 may include a vertical cavity surface-emitting laser (VCSEL). .

The substrate 120 may support the light source 110. Wiring may be patterned on the substrate 120. In addition, the substrate 120 may be supplied with power from the outside, and may supply power to the light source 110 through each wire.

The optical device 130 may reduce the intensity of light output to a certain space with respect to the light output from the light source 110. For example, the optical device 130 diffuses the light to widen the area where the light reaches, and accordingly, the intensity of the light supplied to the unit area may be reduced.

In addition, the optical device 130 may be disposed on the optical substrate 140. The optical device 130 is a device that diffuses light to reduce the intensity of light, but is not limited thereto, but may include a diffuser, a diffraction optical element (DOE), or a combination thereof.

The optical substrate 140 may include a plurality of optical substrates. For example, the optical substrate 140 may include a first optical substrate and a second optical substrate. The first optical substrate and the second optical substrate may be disposed while forming a space spaced between each optical substrate. Further, the optical device 130 may be attached to the first optical substrate or the second optical substrate in the spaced apart space.

In addition, although the optical device 130 is shown on the optical substrate 140 in FIG. 1, the optical device 130 is not disposed on the optical substrate 140, and the optical device 130 without the optical substrate 140 ) May be arranged to be directly supported by the frame 150. For example, a diffuser or a Diffraction Optical Element (DOE) can be placed directly on the frame 150. Therefore, the beam projector module 100 may not include the optical substrate 140.

The frame 150 may be disposed on the substrate 120, and the optical device 130 may be spaced a certain distance from the light source 110. In addition, the insertion slots 10 and 20 may be formed in the frame 150. In addition, the frame may support the optical device 130 when the beam projector module 100 does not include the optical substrate 140, and when the beam projector module 100 includes the optical substrate 140, the optical device 130 or optical The substrate 140 may be supported. In addition, in this case, the optical device 130 and the optical substrate 140 may be simultaneously supported.

An insertion slot 10 may be formed on the first side 1 of the frame 150 to penetrate the first side 1 of the frame 150. The width and thickness of the insertion slot 10 of the first side 1 may be substantially the same as the width and thickness of the optical device 130 and / or the optical substrate 140. The optical device 130 and / or the optical substrate 140 may be inserted into the insertion slot 10 in a sliding manner.

The insertion slot 20 may also be formed inside the second side 2 of the frame 150. The insertion slot 20 of the second side surface 2 may be a shape that is not concavely formed but is recessed in the surface of the frame 150. The optical device 130 can be fixed while sliding up to the insertion slot 20 of the second side 2.

When the optical device 130 and / or the optical substrate 140 are inserted while sliding on the frame 150 and disposed at a predetermined position, the insertion slot 10 may be finished with a sealing member 60 or the like. Then, the outer portion of the insertion slot 10 and the outer portion of the first side 1 of the frame 150 may be additionally closed by the sealing member 60.

The optical device 130 and / or the optical substrate (for the precise alignment of the optical device 130 during the above-described process in which the optical device 130 and / or the optical substrate 140 is slidingly inserted and fixed to the frame 150 ( 140) while adjusting the position of the sealing member 60 can be closed. For example, the position of the optical device 130 or the relative arrangement with the light source 110 may be important in order to effectively disperse the light output from the light source 110. Therefore, the position of the optical device 130 can be accurately adjusted in the 'X' direction shown in FIG. 1 by finely adjusting the degree of insertion while sliding-inserting the optical device 130, and the optical device 130 is accurately positioned. After positioning, the optical device 130 and / or the optical substrate 140 may be finally fixed through the sealing member 60.

The optical device 130 and / or the optical substrate 140 may be finally fixed by the sealing member 60. The sealing member 60 is not limited as long as it is a material having adhesiveness and capable of closing the insertion slot 10, but may include an ultraviolet curable epoxy resin, a thermosetting epoxy resin, or a combination thereof. Therefore, after accurately adjusting the position of the optical device 130, it is possible to finally fix the position of the optical device 130 through a curing process.

In addition, the frame 150 may include support units 155a and 155b for supporting the optical device 130 and / or the optical substrate 140. The optical device 130 and / or the optical substrate 140 is slidingly inserted through the insertion slot 10 so that a part of the upper surface or the lower surface of the optical device 130 and / or the optical substrate 140 is a support portion 155a , 155b) may be mounted on the frame 150. Specifically, a portion of the optical device 130 and / or the optical substrate 140 may be slidingly inserted to contact the upper support portion 155a and the lower support portion 155b of the frame 150, and the upper support portion 155a and The optical device 130 and / or the optical substrate 140 may be supported by the lower support portion 155b.

On the other hand, in the conventional beam projector module, there is a high possibility that the optical device (or the optical substrate on which the optical device is disposed) is attached to the upper side of the frame to be detached by external force. However, in the beam projector module according to the embodiment of the present specification, the optical device 130 and / or the optical substrate 140 are mounted in a sliding manner through the first side 1 of the frame 150 to support 155a, 155b ), Thereby reducing the possibility of detachment of the optical device. Specifically, the conventional beam projector module has a high possibility of being detached in the 'Z' direction because there are few means for fixing the optical device to the movement of the optical device in the 'Z' direction of FIG. 1. However, in the beam projector module according to the embodiment of the present specification, when the optical device 130 and / or the optical substrate 140 moves in the 'Z' direction, the upper side of the frame 150 in which the insertion slots 10 and 20 are formed Since the movement of the optical device 130 and / or the optical substrate 140 is suppressed by the support portion 155a to fix the movement in the corresponding direction, the optical device 130 and / or the optical substrate 140 is The possibility of desorption can be significantly reduced.

2 is a cross-sectional view of the frame according to the first embodiment.

Referring to FIG. 2, the frame 150 may include a first slot 10, a second slot 20, a third slot 30, and a fourth slot 40.

The frame 150 has a first slot 10 to penetrate the first side 1 of the first side 1 of the frame 130 in the direction in which the optical device 130 and / or the optical substrate 140 are inserted. This is formed, the second slot 20 may be formed inside the second side 2 opposite to the first side 1. And, the third slot 30 and the fourth slot 40 may be formed on the side surfaces connecting the first side 1 and the second side 2.

The width and thickness of the first slot 10, the second slot 20, the third slot 30, and the fourth slot 40 are the width and thickness of the optical device 130 and / or the optical substrate 140. It can be formed to be substantially the same. Accordingly, after the optical device 130 and / or the optical substrate 140 are slidingly inserted, the frame 150 can stably support the optical device 130 and / or the optical substrate 140.

3 is a cross-sectional view of the beam projector module according to the second embodiment.

4 is a cross-sectional view of the frame according to the second embodiment.

3 to 4, the beam projector module 200 according to the second embodiment includes a light source 110, a substrate 120, an optical device 130, an optical substrate 140, a frame 150, and the like. It can contain. Further, the second slot 20 may be formed to penetrate the second side 2 of the frame, and the first slot 10 and the second slot 20 may each be closed with a sealing member.

And, as the second slot 20 is formed to penetrate the second side 2 of the frame, the optical device 130 and / or the optical substrate 140 may include the first slot 10 or the second slot 20. Can be inserted in sliding. That is, the sealing member is inserted in both the first side (1) and the second side (2) of the frame, or selectively set as a penetration and fixing part of the first side (1) and the second side (2), so that the sealing member is only in one direction. Can be applied. Accordingly, the process process of the beam projector module can be more flexible.

As a further example, the optical device may include a plurality of optical design areas having different optical properties, and thus a beam projector module having different optical properties may be implemented by changing only the position of the optical device while using the same light source.

E.g, In the optical device and the optical substrate, Excellent long distance precision An optical substrate including an optical device having a certain area including a diffuser used in the TOF method and another area including a structured light pattern used in a structure light (SL) structure having excellent short-range accuracy is provided to the frame. Without fixing, it can be formed to penetrate both the first side and the second side. Accordingly, when a target object is located at a short distance through a user's selection or an algorithm of a processor, the other area of the optical device including the structured light pattern is positioned above the light source so that the beam projector module outputs light in a structured light manner. When a target object is located at a long distance, a certain area of the optical device including the diffuser is positioned above the light source, so that the beam projector module can output light in a TOF method. Accordingly, it is possible to improve the precision of the beam projector module by sliding the optical device and the optical substrate according to the distance of the target object. Alternatively, it is possible to output light having various optical characteristics only through sliding movement of the optical substrate.

In addition, since the second slot 20 is formed to penetrate the second side 2 of the frame, the optical device 130 can be more accurately accurately positioned after sliding the optical device 130. Specifically, after the optical device 130 is slidingly inserted into the frame 150, the position of the optical device 130 can be simultaneously adjusted on the first side 1 and the second side 2 of the frame. It may be easier to place 130 in the correct position.

Also, although not shown in FIGS. 3 to 4, the third slot 30 or the fourth slot 40 is a third side 3 between the first side 1 and the second side 2 of the frame Or it may be formed to penetrate the fourth side (4). That is, the third slot 30 or the fourth slot 40 is the first side 1 of the frame, the second side 2 opposite to the first side 1, the first side 1 and the second side 1 The third side 3 or the fourth side 4 between the side surfaces 2 may be formed to pass therethrough.

When the third slot 30 or the fourth slot 40 is formed to penetrate the third side 3 or the fourth side 4, adjusting the position of the optical device 130 in the beam projector module manufacturing process Things can be more effective. Specifically, as illustrated in FIG. 4, when the first slot 10 and the second slot 20 are formed to penetrate the first side 1 and the second side 2 of the frame 150, ' It is possible to adjust the position of the optical device only in the X 'direction. However, when the third side 3 or the fourth side 4 is penetrated, it is also possible to adjust the position of the optical device 130 in the 'Y' direction, so that the accurate position adjustment of the optical device 130 is possible. It can be easier.

5 is a cross-sectional view of a frame according to an embodiment of the specification.

6 is a cross-sectional view of a frame according to an embodiment of the specification.

5 to 6, a wrinkle portion 51 may be formed on the optical substrate 140. The wrinkles 51 may have curved irregularities. The curved irregularities may also be formed in the insertion slots 10, 20, 30, and 40. For example, the first slot 10, the second slot 20, the third slot 30 and the fourth slot 40 correspond to the curved irregularities of the corrugated portion 51 of the optical substrate 140. The curved unevenness 52 may be formed on one surface of the insertion slot.

In addition, the fixing force between the optical device 130 and / or the optical substrate 140 and the frame 150 may be enhanced by the wrinkles 51 and the curved unevenness 52 corresponding thereto. In addition, in the case of slidingly inserting the optical device 130 or the optical substrate 140 into the frame 150 in the process of manufacturing the beam projector module, the optics through the corrugated portion 51 and the curved irregularities 52 with appropriate fixing force It may be easier to place the device 130 in the correct position.

7 is a cross-sectional view of the beam projector module according to the third embodiment.

Referring to FIG. 7, the beam projector module 300 according to the third embodiment includes a light source 110, a substrate 120, an optical device 130, an optical substrate 140, a frame 350, a sensor 370 , A processor 380 and the like.

The power supply to the light source 110 may be controlled by the processor 380, and the processor 380 may control power supplied to the light source 110 in a normal mode and an eye protection mode differently. For example, the processor 380 may not supply power to the light source 110 only in the normal mode and not to the light source 110 in the eye protection mode. As another example, the processor 380 may supply relatively less power to the light source 110 in the eye protection mode than in the normal mode.

The substrate 120 may support the light source 110. Wiring may be patterned on the substrate 120. In addition, the substrate 120 may be supplied with power from the outside, and may supply power to the light source 110, the sensor 370, the processor 380, etc. through each wire.

The frame 350 may include a first frame portion 351 and a second frame portion 352. The first frame unit 351 may separate the optical device 130 from the light source 110 by a predetermined distance. The second frame part 352 may include a support part (not shown) that supports the optical device 130 and / or the optical substrate 140. In addition, a portion of the upper surface or the lower surface of the optical device 130 and / or the optical substrate 140 may be mounted on the frame 350 so as to contact the support (not shown).

In addition, the first frame portion 351 and the second frame portion 352 may be connected through a bonding portion 360 including a conductive material. The bonding portion 360 may include a conductive material, and the conductive material is not limited as long as it is an adhesive and conductive material.

The sensor 370 may be a resistance sensor that can communicate with the processor 380 and is electrically connected to the junction 360 to measure the resistance value of the junction 360.

The processor 380 may change the operation mode of the light source 110 according to the resistance value of the sensor 370. For example, the processor 380 may operate the light source 110 in an eye-safety mode when the resistance value of the sensor 370 is equal to or greater than a predetermined constant resistance value. In the eye-safety mode, the processor 380 may block or reduce power supplied to the light source 110.

Alternatively, the processor 380 may cause the light source 110 to output the wavelength of the pre-protected eye band in the eye-safety mode. For example, the wavelength of the eye protection free band may be 1050 nm.

8 is an enlarged view of part (B) of FIG. 7.

Referring to FIG. 8, the frame 350 may include a first frame portion 351 and a second frame portion 352, and the first frame portion 351 and the second frame portion 352 may be joined to each other ( 360).

The first frame part 351 may contact the bonding part 360 through the first bonding surface 353. In addition, the wiring may be patterned on part or all of the first bonding surface 353. In addition, the second frame portion 352 may contact the bonding portion 360 through the second bonding surface 354. In addition, wiring may be patterned on part or all of the second bonding surface 354. Accordingly, the first frame portion 351, the second frame portion 352, and the bonding portion 360 through the first bonding surface 353, the second bonding surface 354, and the bonding portion 360 containing the conductive material Can be electrically connected. In addition, as the first frame part 351, the second frame part 352, and the bonding part 360 are electrically connected, the second frame part 352 is the first frame part 351 due to external impact or the like. And, if the distance from the bonding portion 360, the resistance value of the bonding portion 360 may change. Further, the first bonding surface 353 and the second bonding surface 354 are not formed with wiring, and may be plated with metal. Therefore, the first bonding surface 353, the second bonding surface 354, and the bonding portion 360 may be electrically connected through metal plating. The metal is not limited as long as it is conductive, but may be copper, gold, nickel, or a combination thereof.

The second frame portion 352 may include support portions 355a and 355b. The support portion may include an upper support portion 355a and a lower support portion 355b, and the upper support portion 355a and the lower support portion 355b are provided with the optical device 130 and / or the optical substrate 140 in the upper and lower directions, respectively. It can be stably supported.

And, the optical device 130 and / or the optical substrate 140 is slidingly inserted through a first slot formed to penetrate the first side of the second frame 352, the optical device 130 and / or optical substrate A part of the upper surface or the lower surface of the 140 may be mounted on the frame 350 so as to contact the support parts 355a and 355b.

In addition, the second frame portion 352 may include a socket 357 formed on the second bonding surface 354. In addition, the first frame part 351 may include an uneven structure 358 corresponding to the socket 357 on the first bonding surface 353. When the first frame portion 351 and the second frame portion 352 are connected through the junction portion 360, the socket 357 and the uneven structure 358 may increase their coupling force. For example, as illustrated in FIG. 8, when the first frame portion 351 includes the uneven structure 358 and the second frame portion 352 includes the corresponding socket 357, the first frame When the part 351 or the second frame part 352 is subjected to an external impact, the socket 357 and the uneven structure 358 determine the contact area between the first frame part 351 and the second frame part 352. Widening, it is possible to suppress the separation from each other through the engagement of each other.

7 to 8, the first frame part 351 includes an uneven structure, and the second frame part 352 includes an socket, but the first frame part 351 is not limited thereto. ) Includes a socket, and the second frame portion 352 may include an uneven structure.

The first frame portion 351 may be formed with wiring inside and outside the first frame portion 351 so as to be electrically connected to the junction portion 360 including a conductive material. Alternatively, a via fill 359 formed inside the first frame portion 351 may be included. In addition, the sensor 370 and the junction 360 may be electrically connected through a wiring or via fill 359 formed inside or outside the first frame part 351.

Therefore, when the resistance value of the junction portion 360 changes, the sensor 370 is a wiring formed on the first bonding surface 353, the second bonding surface 354 and the wiring formed inside and outside the first frame portion 351 Alternatively, the via portion 359 may be connected to the junction 360 by electrical warfare, and the resistance value of the junction 360 may be measured. The via-fill 359 is not limited as long as it is an electrically conductive material, but may be formed of copper, gold, nickel, or a combination thereof.

9A and 9B are cross-sectional views illustrating various sockets of a frame according to an exemplary embodiment of the present specification.

9A and 9B, the frame 350 of the beam projector module according to an embodiment may include sockets 359 having various structures. For example, as shown in FIG. 9A, the frame 350 may include a socket 357a and an uneven structure 358a including an inclined surface, not a right angle structure, and the first as shown in FIG. 9B. In consideration of the coupling force between the frame portion 351 and the second frame portion 352, one or more sockets 357b and an uneven structure 358b may be included.

10 is a view showing a case in which an abnormality occurs in the beam projector module according to the third embodiment.

Referring to FIG. 10, the beam projector module 300 may be spaced apart from the first frame unit 351 and the second frame unit 352 due to factors such as external impact.

When the first frame portion 351 and the second frame portion 352 are separated, the optical substrate 140 to which the optical device 130 is attached may be spaced apart from the first frame portion 351 beyond the normal position, Accordingly, while the intensity of the light output from the light source 110 is not reduced, it may cause damage to the eye while reaching the user's eye.

Meanwhile, when the first frame part 351 and the second frame part 352 are physically separated, the first frame part 351 and the second frame part 352 are no longer electrically connected, and accordingly the sensor The resistance value of the junction 360 measured at 370 increases. At this time, the processor 380 may compare the resistance value measured by the sensor with a predetermined constant resistance value. Then, when determining that the resistance value measured by the sensor 370 is greater than a predetermined constant resistance value, the processor 380 may operate the light source 110 in an eye-safety mode. Alternatively, the processor 380 may measure the rate of change of the resistance value to operate the light source 110 in an eye-safety mode when the rate of change is greater than or equal to a predetermined value.

That is, the processor 380 may determine whether the optical device 130 is disposed at a normal position according to a resistance value measured at the junction 360 and operate an eye-safety mode. In addition, when the eye protection mode is activated, the processor 380 stops supplying power to the light source 110 and does not output light, or supplies less power during normal driving to reduce the intensity of light, so that the optical device 130 is normal. Even if it is out of position, it is possible to prevent the output light from reaching the user's eyes as it is, thereby safely protecting the user's eyes.

11 is a cross-sectional view of the beam projector module according to the fourth embodiment.

12 is a view for explaining the effect of adjusting the angle of view of the beam projector module according to the fourth embodiment.

Referring to FIG. 11, the support portions 455a and 455b included in the frame 450 of the beam projector module 400 extend a predetermined length inside the frame 450 so as to adjust the angle of view 90 of the light source 110. Can be.

The lengths of the support parts 455a and 455b may be extended in consideration of the preset angle of view 90 of the beam projector module 400. For example, the angle of view required for the beam projector module may vary depending on the characteristics of the light source, the environment of the device in which the beam projector module is installed, and the purpose of use. At this time, it is important that the beam projector module outputs light accurately according to the required angle of view.

Specifically, as shown in FIG. 12, in the beam projector module 1100 in which the angle of view of the output light is not correctly set, the angle of view and the opening 93 of the transmitter of the device in which the distance measurement module 1000 is installed are not correctly aligned. , Some of the emitted light 92 does not pass through the transmitter opening 93 or is diffracted around the transmitter opening 93 so that it is not reflected by the target object and can reach the receiver 1200. At this time, since some of the light 92 has a relatively short distance compared to the light reflected by the target object, some light 92 may cause an error in which the receiver 1200 incorrectly measures the distance of the target. Therefore, noise may occur in the distance measurement result.

On the other hand, in the case of the beam projector module 400 of FIG. 11 in which the angle of view is correctly set, the angle of view is correctly aligned with the aperture of the transmitter of the device installed differently from the beam projector module of FIG. 12 so that the output light does not pass through the aperture of the transmitter or is diffracted. It is possible to minimize the phenomenon. As a result, errors and noise in distance measurement results can be greatly reduced.

As such, it is important that the beam projector module accurately outputs light at a preset angle of view, and the beam projector module 400 shown in FIG. 11 is extended in a predetermined length in consideration of the angle of view 90 of the support portions 455a and 455b. It is possible to accurately output light at a preset angle of view 90. In addition, the lengths of the support portions 455a and 455b may be adjusted differently according to the set angle of view of each beam projector.

In addition, although the support of FIG. 11 is shown as extending both the upper support 455a and the lower support 455b, only the lower support 455b may be extended, or only the upper support 455a may be extended. In addition, the lengths of the upper supporting portions 455a and the lower supporting portions 455b may be different from each other.

In addition, as the support portions 455a and 455b are extended, the area where the support portions 455a and 455b support the optical device 130 and / or the optical substrate 140 is relatively wide, and accordingly, the optical device 130 And / or it is possible to more effectively prevent the optical substrate 140 from being detached.

13 is a cross-sectional view of the beam projector module according to the fifth embodiment.

Referring to FIG. 13, a first bonding surface and a second bonding surface of the frame 550 may have a shape including curved irregularities.

Accordingly, the surface of the portion where the bonding portion is disposed in a shape including a curved irregularity and is adhered to the first frame portion 551 and the second frame portion 552 can be widened, so that the first frame portion 551 and the first By increasing the adhesion between the two frame parts 552, they can be connected more firmly.

14 is a flow chart of a beam projector module according to an embodiment of the specification to change the operation mode according to the resistance value.

Referring to FIG. 14, the processor may acquire a resistance value from the sensor (S102). Here, the resistance value may be a resistance value measured at the junction.

The processor may determine whether the measured resistance value is smaller than the reference resistance value (S104). Here, the processor may determine whether the resistance value increases above a certain ratio by measuring the rate of change of the resistance value.

The processor may drive the light source in the normal mode when the resistance value is lower than the reference resistance value. (S106) And, if the resistance value is higher than the reference resistance value, the processor may drive the light source in an eye-sasfety mode (S108). In the eye protection mode, the processor can turn off the light source or reduce the power supply to the light source.

As described above, according to the present embodiment, even when an abnormality occurs in the beam projector module, the user's eyes can be safely protected.

The terms "comprise", "consist" or "have" as described above mean that the corresponding component can be inherent unless otherwise stated, and do not exclude other components. It should be interpreted that it may further include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the meaning of the context of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (20)

A light source that outputs light;
A substrate on which the light source is supported;
An optical device that reduces the intensity of the light output to a certain space relative to the light;
An optical substrate on which the optical device is disposed and which transmits the light; And
It includes; a frame, comprising a support for supporting the optical substrate, and spaced a predetermined distance from the light source, the optical device, including,
The optical substrate is slidingly inserted through a first slot formed to penetrate the first side of the frame, so that a part of the upper or lower surface of the optical substrate is mounted on the frame so as to contact the support, the beam projector module . According to claim 1,
In the frame, a second slot is formed inside the second side opposite to the first side,
A beam projector module in which one edge of the optical device that is inserted through the first slot is inserted into the second slot. According to claim 1,
The first slot is closed with a sealing member, the beam projector module. According to claim 1,
In the frame, a second slot is formed inside the second side opposite to the first side,
The optical device includes a plurality of regions having different optical characteristics,
According to the sliding movement of the optical substrate through the first slot and the second slot, the beam projector module, each area having different optical characteristics of the optical device is disposed on the upper side of the light source. According to claim 2,
The second slot is formed to penetrate the second side,
The beam projector module, wherein the first slot and the second slot are respectively closed with a sealing member. According to claim 2,
In the frame, a third slot is formed to penetrate a third side between the first side and the second side,
The third slot is closed with a sealing member, the beam projector module. According to claim 2,
In the optical substrate, a curved projector is formed on one surface of the portion inserted into the second slot, the beam projector module. The method of claim 7,
A beam projector module, in which a wrinkle is formed on one surface of the second slot so as to correspond to the curved uneven shape. According to claim 1,
The light source includes a vertical cavity surface-emitting laser (VCSEL),
The optical device includes a diffuser for dispersing the light, the beam projector module. A light source that outputs light;
A substrate on which the light source is supported;
An optical device that reduces the intensity of the light output to a certain space relative to the light; And
An optical substrate on which the optical device is disposed and which transmits the light;
A frame including a first frame portion spaced apart the optical device from the light source by a predetermined distance, and a second frame portion connected to the first frame portion through a junction portion including a conductive material and including a support portion supporting the optical substrate. ;
A sensor electrically connected to the conductive junction to measure a resistance value of the junction; And
Includes a processor for operating the light source in an eye-safety mode when the resistance value is greater than or equal to a predetermined constant resistance value.
A beam projector module mounted on the frame such that a portion of the upper or lower surface of the optical substrate is in contact with the support. The method of claim 10,
The conductive material is a conductive epoxy, beam projector module. The method of claim 10,
The light source includes a vertical cavity surface-emitting laser (VCSEL),
The optical device includes a diffuser for dispersing the light, the beam projector module. The method of claim 10,
The second frame portion includes a socket formed on a second joint surface that abuts the second frame portion and the joint portion,
The first frame portion, a beam projector module, a structure corresponding to the socket is formed on a first joint surface where the first frame portion and the joining portion abut. The method of claim 13,
The second frame portion includes one or more of the sockets on the second bonding surface, the beam projector module. The method of claim 10,
The first frame portion includes wiring on a first joint surface where the first frame portion and the joint portion abut,
The second frame portion includes a wire on a second bonding surface where the second frame portion and the bonding portion abut, the beam projector module. The method of claim 10,
The sensor is electrically connected to the junction through a via fill formed inside the first frame portion, a beam projector module. The method of claim 10,
The support portion, the beam projector module, extending a predetermined length inside the frame according to a preset angle of view. The method of claim 10,
The optical substrate is slidingly inserted through a first slot formed to penetrate the first side of the second frame, and mounted on the frame such that a portion of the upper or lower surface of the optical substrate is in contact with the support. Projector module. The method of claim 10,
The first bonding surface and the second bonding surface includes a curved irregularity, the beam projector module. The method of claim 10,
The processor measures the rate of change of the resistance value, and when the rate of change is greater than or equal to a predetermined value, the beam projector module operates the light source in an eye-safety mode.

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