Sensor and electronic device

Abstract

The utility model discloses a sensor and an electronic device, the sensor comprises a substrate, a laser, a sensing chip, a housing and an optical filter assembly, the laser is connected with the substrate, the sensing chip is connected with the substrate, the housing covers the substrate to form an accommodating cavity, the housing is provided with a light outlet hole and a light inlet hole which are communicated with the accommodating cavity, the light outlet hole is arranged facing the laser, and the light inlet hole is arranged facing the optical filter assembly. The light inlet hole faces the sensing chip, the optical filter assembly comprises a first optical filter and a second optical filter, the optical filter assembly is located outside the containing cavity, the first optical filter and the second optical filter are both connected with the shell, and the first optical filter and the second optical filter are used for covering the light outlet hole and the light inlet hole respectively. The first optical filter and the second optical filter are arranged on the outer side of the accommodating cavity, so that the process of mounting the optical filters by overturning the shell is omitted, and the technological process is simplified; the installation of the optical filter is not limited by the narrow space in the shell, so that the installation difficulty of the first optical filter and the second optical filter is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a sensor and an electronic device. Background Art

[0002] With the advancement of technology, D-TOF (full name: Direct-Time Of Flight, Chinese name: direct flight time) optical sensor products are widely used in smart homes, autonomous driving and smart wearables. As an important part of the product, the filter can protect the VCSEL (full name: Vertical Cavity Surface Emitting Laser, Chinese name: vertical cavity surface emitting laser) and the receiving area, and filter out incoherent light sources. The current design of D-TOF optical sensors is to stick the filter inside the shell, which requires turning the shell over before bonding the shell to the substrate, and then sticking the filter to the two grooves in the shell. The internal space of the shell is small and the operation is difficult. After the filter is installed, the shell needs to be turned over again so that the opening of the shell faces the substrate, and then the shell and the substrate are bonded. This makes the production process of D-TOF optical sensors complicated and the mounting of filters difficult.

[0003] In view of this, it is necessary to provide a new sensor and electronic device to solve or at least alleviate the above technical defects. Utility Model Content

[0004] The main purpose of the utility model is to provide a sensor and an electronic device, aiming to solve the technical problems of the existing D-TOF optical sensor having a complex production process and difficult filter mounting.

[0005] In order to achieve the above object, the utility model provides a sensor, the sensor comprising:

[0006] substrate;

[0007] a laser connected to the substrate;

[0008] A sensing chip connected to the substrate;

[0009] A shell, wherein the shell is covered on the substrate to form a receiving cavity, and the shell is provided with a light exit hole and a light inlet hole connected to the receiving cavity, the light exit hole is arranged facing the laser, and the light inlet hole is arranged facing the sensor chip;

[0010] A filter assembly, the filter assembly comprising a first filter and a second filter, the filter assembly is located outside the accommodating cavity, and the first filter and the second filter are both connected to the housing, and the first filter and the second filter are respectively used to cover the light exit hole and the light entrance hole.

[0011] In one embodiment, the shell is further provided with a first mounting hole connected to the light output hole, and the first filter is arranged in the first mounting hole; the shell is further provided with a second mounting hole connected to the light input hole, and the second filter is arranged in the second mounting hole.

[0012] In one embodiment, the first mounting hole and the light output hole are arranged in a stepped hole to form a first stepped hole, the aperture of the first mounting hole is larger than the aperture of the light output hole, and the first filter is connected to the hole wall of the first stepped hole on the side facing the accommodating cavity; the second mounting hole and the light input hole are arranged in a stepped hole to form a second stepped hole, the aperture of the second mounting hole is larger than the aperture of the light input hole, and the second filter is connected to the hole wall of the second stepped hole on the side facing the accommodating cavity.

[0013] In one embodiment, the first stepped hole is arranged at the top of the housing so that the hole wall of the first stepped hole can support the first filter, and the second stepped hole is arranged at the top of the housing so that the hole wall of the second stepped hole can support the second filter.

[0014] In one embodiment, the hole wall of the first stepped hole can be fitted with the side of the first filter facing the accommodating cavity, and the hole wall of the second stepped hole can be fitted with the side of the second filter facing the accommodating cavity.

[0015] In one embodiment, the outer shell includes a shell body and a partition portion that are interconnected, the shell body is connected to the substrate and surrounds the accommodating cavity, the partition portion is used to divide the accommodating cavity into a first cavity and a second cavity, the laser is disposed in the first cavity, the sensing chip passes through the partition portion, the light output hole is connected to the first cavity, and the light input hole is connected to the second cavity.

[0016] In one embodiment, the sensor further includes a shading assembly, the shading assembly including a first shading member, the first shading member being disposed in the first cavity, the first shading member being connected to a side of the partition portion facing the first cavity, the first shading member being further used to connect to a side of a portion of the body of the sensing chip located in the first cavity, away from the substrate, so that the first shading member can cover the gap between the partition portion and the sensing chip.

[0017] In one embodiment, the shading assembly also includes a second shading member, which is disposed in the second cavity, and is connected to the side of the partition portion facing the second cavity, so that the partition portion is located between the first shading member and the second shading member, and the second shading member is also used to connect to the side of the portion of the body of the sensing chip located in the second cavity, which is away from the substrate, so that the second shading member can cover the gap between the partition portion and the sensing chip.

[0018] In one embodiment, the top of the sensing chip can abut against the bottom of the partition.

[0019] In one embodiment, the laser is a VCSEL laser, and the sensing chip is a SENSOR chip.

[0020] In one embodiment, a side of the first optical filter and the second optical filter away from the accommodating cavity is arranged flush with the outer side of the housing.

[0021] In addition, the utility model also provides an electronic device, which includes the above-mentioned sensor.

[0022] In the above technical scheme of the utility model, the laser and the sensor chip are mounted on the substrate, and then the laser and the sensor chip are wired and then glued, and then the outer shell is covered on the substrate, so that the outer shell and the substrate can form a housing cavity for accommodating the laser and the sensor chip, and then the light outlet hole is covered by the first filter located outside the housing cavity, and the light inlet hole is covered by the second filter also located outside the housing cavity. Since the first filter and the second filter are both arranged on the outside of the housing cavity, the process of flipping the outer shell to install the filter and the process of flipping it back after installing the filter are omitted, and the outer shell is directly bonded to the substrate, which simplifies the process flow. At the same time, since the installation of the first filter and the second filter is not limited by the narrow space inside the outer shell, the difficulty of installing the first filter and the second filter is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation mode of the utility model or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the utility model. For ordinary technicians in this field, other drawings can be obtained by using the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of a sensor according to an embodiment of the present utility model.

[0025] Description of Figure Numbers:

[0026]

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the position of the user in a certain posture (such as the attached Figure 1 The relative position relationship, movement status, etc. between the various components under the specific posture are shown. If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" can explicitly or implicitly include at least one of the features.

[0031] Furthermore, the technical solutions between the various implementation modes of the present invention can be combined with each other, but this must be based on the fact that ordinary technicians in the field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The utility model provides a sensor 1. In one embodiment, Figure 1As shown, the sensor 1 includes a substrate 11, a laser 12, a sensing chip 13, a housing 14 and a filter assembly 15. The laser 12 is connected to the substrate 11, the sensing chip 13 is connected to the substrate 11, the housing 14 is covered on the substrate 11 to form a accommodating cavity 16, the housing 14 is provided with a light exit hole 1411 and a light inlet hole 1412 connected to the accommodating cavity 16, the light exit hole 1411 is arranged facing the laser 12, and the light inlet hole 1412 is arranged facing the sensing chip 13, the filter assembly 15 includes a first filter 151 and a second filter 152, the filter assembly 15 is located outside the accommodating cavity 16, and the first filter 151 and the second filter 152 are both connected to the housing 14, and the first filter 151 and the second filter 152 are used to cover the light exit hole 1411 and the light inlet hole 1412 respectively.

[0033] The laser 12 and the sensor chip 13 are mounted on the substrate 11, and then wired and glued. The housing 14 is then placed on the substrate 11, so that the housing 14 and the substrate 11 can enclose a housing cavity 16 for accommodating the laser 12 and the sensor chip 13. The light exit hole 1411 is covered by a first filter 151 located outside the housing cavity 16, and the light entrance hole 1412 is covered by a second filter 152 also located outside the housing cavity 16. Since the first filter 151 and the second filter 152 are both arranged on the outside of the housing cavity 16, the process of flipping the housing 14 to install the filter and the process of flipping it back after the filter is installed are omitted, and the housing 14 is directly bonded to the substrate 11, which simplifies the process flow. At the same time, since the first filter 151 and the second filter 152 are installed, the housing 14 is directly bonded to the substrate 11, and the process flow is simplified. The second optical filter 152 is not restricted by the narrow space inside the housing 14, thus greatly reducing the difficulty of installing the first optical filter 151 and the second optical filter 152; and since the existing sensor 1 sets the optical filter in the accommodating cavity 16, what is covered is the opening of the through hole on the housing 14 located on one side of the accommodating cavity 16. Since the opening on the other side of the through hole is set outward, foreign matter from the outside will fall into the through hole, thereby causing the sensor 1 to fail; and since the first optical filter 151 and the second optical filter 152 are located on the outside of the accommodating cavity 16, the first optical filter 151 can cover or block the opening of the light outlet hole 1411 facing outward, and similarly, the second optical filter 152 can also cover and block the opening of the light inlet hole 1412 facing outward, thereby effectively preventing foreign matter from the outside from falling into the light outlet hole 1411 and the light inlet hole 1412. It should be noted that the first optical filter 151 can be directly covered on the light exit hole 1411, or can be embedded in the light exit hole 1411, and the second optical filter 152 can also be directly covered on the light entrance hole 1412, or can be embedded in the light entrance hole 1412. It should also be noted that the first optical filter 151 and the second optical filter 152 can be abutted, bonded or clamped with the housing 14.

[0034] In one embodiment, the shell 14 is further provided with a first mounting hole 1413 connected to the light exit hole 1411, and the first filter 151 is arranged in the first mounting hole 1413; the shell 14 is further provided with a second mounting hole 1414 connected to the light entrance hole 1412, and the second filter 152 is arranged in the second mounting hole 1414. Providing the first mounting hole 1413 to accommodate the first optical filter 151 helps to assist in positioning the first optical filter 151 through the first mounting hole 1413, thereby reducing the difficulty in positioning the first optical filter 151, and because the first mounting hole 1413 can completely accommodate the first optical filter 151 or at least accommodate a portion of the first optical filter 151, compared with directly attaching the filter to the outer wall of the housing 14, the thickness of the sensor 1 is reduced; similarly, providing the second mounting hole 1414 to accommodate the second optical filter 152 also helps to assist in positioning the second optical filter 152 through the second mounting hole 1414, thereby reducing the difficulty in positioning the second optical filter 152, and is also beneficial to reducing the thickness of the sensor 1.

[0035] In one embodiment, the first mounting hole 1413 and the light exit hole 1411 are arranged in a stepped hole to form a first stepped hole, the aperture of the first mounting hole 1413 is larger than the aperture of the light exit hole 1411, and the first filter 151 is connected to the hole wall 1415 of the first stepped hole on the side facing the accommodating cavity 16; the second mounting hole 1414 and the light entrance hole 1412 are arranged in a stepped hole to form a second stepped hole, the aperture of the second mounting hole 1414 is larger than the aperture of the light entrance hole 1412, and the second filter 152 is connected to the hole wall 1416 of the second stepped hole on the side facing the accommodating cavity 16. The first mounting hole 1413 and the light exit hole 1411 are arranged in a stepped hole to form a first stepped hole. The first mounting hole 1413 is located above the light exit hole 1411, and the aperture of the first mounting hole 1413 is larger than the aperture of the light exit hole 1411, so that the first filter 151 located in the first mounting hole 1413 can cover the light exit hole 1411, and because the first filter 151 is connected to the hole wall 1415 of the first stepped hole on the side facing the accommodating cavity 16, it is possible to prevent the first filter 151 from passing through the light exit hole 1411. 1 falls into the accommodating cavity 16; similarly, the second mounting hole 1414 and the light inlet hole 1412 are arranged in a stepped hole to form a second stepped hole, and the aperture of the second mounting hole 1414 is larger than the aperture of the light inlet hole 1412, so that the second filter 152 located in the second mounting hole 1414 can cover the light inlet hole 1412, and because the second filter 152 is connected to the hole wall 1416 of the second stepped hole on the side facing the accommodating cavity 16, the second filter 152 can be prevented from falling into the accommodating cavity 16 through the light inlet hole 1412. It should be noted that the diameter of the first filter 151 is larger than the inner diameter of the light outlet hole 1411, and the diameter of the second filter 152 is larger than the inner diameter of the light inlet hole 1412. It should also be noted that, compared to placing the filter in the accommodating cavity 16, since the through hole of the housing 14 of the sensor 1 is also set at the top, the filter needs to be bonded to the inner wall of the housing 14 through an adhesive layer in the absence of support. However, when there is a bonding problem with the filter, this arrangement will cause part of the light emitted by the laser 12 to pass through the gap in the adhesive layer to the outside of the accommodating cavity 16 instead of passing through the filter, resulting in light leakage. In this embodiment, since the first filter 151 is arranged outside the accommodating cavity 16, the light emitted by the laser 12 will first pass through the light output hole 1411. Since the first filter 151 completely covers the light output hole 1411, the light emitted from the light output hole 1411 will basically all pass through the first filter 151, thereby effectively avoiding the occurrence of light leakage caused by the adhesive problem of the filter.

[0036] In one embodiment, the first stepped hole is disposed at the top of the housing 14, so that the hole wall 1415 of the first stepped hole can support the first filter 151, and the second stepped hole is disposed at the top of the housing 14, so that the hole wall 1416 of the second stepped hole can support the second filter 152. The first stepped hole is disposed at the top of the housing 14, so that the hole wall 1415 of the first stepped hole can provide reliable support for the first filter 151; the second stepped hole is also disposed at the top of the housing 14, so that the hole wall 1416 of the second stepped hole can provide reliable support for the second filter 152.

[0037] In one embodiment, the hole wall 1415 of the first stepped hole can be fitted with the side of the first optical filter 151 facing the accommodating cavity 16, and the hole wall 1416 of the second stepped hole can be fitted with the side of the second optical filter 152 facing the accommodating cavity 16. The side of the first optical filter 151 facing the accommodating cavity 16 is fitted with the hole wall 1415 of the first stepped hole, which helps to stably install the first optical filter 151. Similarly, the side of the second optical filter 152 facing the accommodating cavity 16 is fitted with the hole wall 1416 of the second stepped hole, which helps to stably install the second optical filter 152.

[0038] In one embodiment, the housing 14 includes a shell body 141 and a partition 142 connected to each other. The shell body 141 is connected to the substrate 11 and encloses the accommodating cavity 16. The partition 142 is used to divide the accommodating cavity 16 into a first cavity 161 and a second cavity 162. The laser 12 is disposed in the first cavity 161. The sensor chip 13 passes through the partition 142. The light exit hole 1411 is connected to the first cavity 161, and the light entrance hole 1412 is connected to the second cavity 162. The first cavity 161 and the second cavity 162 are two independent cavities. The light exit hole 1411 is disposed opposite to the laser 12 in the first cavity 161, and the light entrance hole 1412 is disposed toward the sensor chip 13 in the second cavity 162.

[0039] In one embodiment, the sensor 1 further includes a shading component 17, which includes a first shading member 171. The first shading member 171 is disposed in the first cavity 161, and is connected to a side of the partition 142 facing the first cavity 161. The first shading member 171 is also used to connect to a side of the body of the sensing chip 13 located in the first cavity 161 and away from the substrate 11, so that the first shading member 171 can cover the gap between the partition 142 and the sensing chip 13. The first shading member 171 is abutted against the side wall of the partition 142 located in the first cavity 161 and is also connected to the top surface of the sensing chip 13, so that the first shading member 171 can effectively block the light in the first cavity 161 from being emitted into the second cavity 162 through the gap between the sensing chip 13 and the partition 142.

[0040] In one embodiment, the shading assembly 17 also includes a second shading member 172, which is disposed in the second cavity 162. The second shading member 172 is connected to the side of the partition 142 facing the second cavity 162, so that the partition 142 is located between the first shading member 171 and the second shading member 172. The second shading member 172 is also used to connect to the side of the portion of the body of the sensing chip 13 located in the second cavity 162, which is away from the substrate 11, so that the second shading member 172 can cover the gap between the partition 142 and the sensing chip 13. By adding the second shading member 172, it is possible to more effectively block the light in the first cavity 161 from being emitted into the second cavity 162 through the gap between the sensing chip 13 and the partition 142; and because the partition 142 is located between the first shading member 171 and the second shading member 172, the phenomenon of damage to the sensing chip 13 caused by the partition 142 being too high or the shading member being too high is avoided. Because the existing shading member is connected to the bottom surface of the partition 142, that is, the shading member is located between the partition 142 and the sensing chip 13, it is limited by the shell body 141. If the height of the partition 142 and the shading member is too high compared to the design height, the partition 142 will press down the sensing chip 13 through the shading member when the shell body 141 is bonded to the PCB, causing the chip to be damaged. It should be noted that the bottom surface of the partition 142 is lower than the top surface of the first shading member 171 and the second shading member 172. It should also be noted that the first light shielding member 171 and the second light shielding member 172 are formed by a one-time double-scribing process.

[0041] In one embodiment, the top of the sensor chip 13 can abut against the bottom of the partition 142. The top of the sensor chip 13 can abut against the bottom of the partition 142, thereby effectively preventing the light in the first cavity 161 from being emitted into the second wall.

[0042] In one embodiment, the laser 12 is a VCSEL laser 12 , and the sensor chip 13 is a SENSOR chip.

[0043] In one embodiment, the first filter 151 and the second filter 152 are arranged flush with the outer side of the housing 14 on the side away from the accommodating cavity 16. The first filter 151 is arranged flush with the outer side of the housing 14, thereby effectively preventing foreign objects from falling into the first mounting hole 1413 and causing the sensor 1 to fail, and also reducing the overall thickness of the sensor 1; similarly, the second filter 152 is arranged flush with the outer side of the housing 14, thereby effectively preventing foreign objects from falling into the second mounting hole 1414 and causing the sensor 1 to fail.

[0044] In addition, the utility model also provides an electronic device, which includes the above-mentioned sensor 1. The sensor 1 can be a D-TOF sensor. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0045] The above are only preferred implementations of the utility model, and do not limit the patent scope of the utility model. All equivalent structural changes made based on the concept of the utility model and the contents of the description and drawings of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A sensor, characterized in that: include: substrate; a laser connected to the substrate; A sensing chip connected to the substrate; A shell, wherein the shell is covered on the substrate to form a receiving cavity, and the shell is provided with a light exit hole and a light inlet hole connected to the receiving cavity, the light exit hole is arranged facing the laser, and the light inlet hole is arranged facing the sensor chip; A filter assembly, the filter assembly comprising a first filter and a second filter, the filter assembly is located outside the accommodating cavity, and the first filter and the second filter are both connected to the housing, and the first filter and the second filter are respectively used to cover the light exit hole and the light entrance hole.

2. The sensor according to claim 1, characterized in that The housing is also provided with a first mounting hole connected to the light exit hole, and the first filter is arranged in the first mounting hole; the housing is also provided with a second mounting hole connected to the light entrance hole, and the second filter is arranged in the second mounting hole.

3. The sensor according to claim 2, characterized in that The first mounting hole and the light output hole are arranged in a stepped hole to form a first stepped hole, the aperture of the first mounting hole is larger than the aperture of the light output hole, and the first filter is connected to the hole wall of the first stepped hole on the side facing the accommodating cavity; the second mounting hole and the light input hole are arranged in a stepped hole to form a second stepped hole, the aperture of the second mounting hole is larger than the aperture of the light input hole, and the second filter is connected to the hole wall of the second stepped hole on the side facing the accommodating cavity.

4. The sensor according to claim 3, characterized in that The first stepped hole is arranged at the top of the housing so that the hole wall of the first stepped hole can support the first filter, and the second stepped hole is arranged at the top of the housing so that the hole wall of the second stepped hole can support the second filter.

5. The sensor according to claim 3, characterized in that The hole wall of the first stepped hole can be fitted with the side of the first filter facing the accommodating cavity, and the hole wall of the second stepped hole can be fitted with the side of the second filter facing the accommodating cavity.

6. The sensor according to any one of claims 1 to 5, characterized in that: The shell includes a shell body and a partition that are connected to each other. The shell body is connected to the substrate and surrounds the accommodating cavity. The partition is used to divide the accommodating cavity into a first cavity and a second cavity. The laser is arranged in the first cavity. The sensing chip passes through the partition. The light output hole is connected to the first cavity, and the light input hole is connected to the second cavity.

7. The sensor according to claim 6, characterized in that The sensor also includes a shading component, which includes a first shading member. The first shading member is disposed in the first cavity, and is connected to a side of the partition portion facing the first cavity. The first shading member is also used to connect to a side of a portion of the body of the sensing chip located in the first cavity, which is away from the substrate, so that the first shading member can cover the gap between the partition portion and the sensing chip.

8. The sensor according to claim 7, characterized in that The shading assembly also includes a second shading member, which is disposed in the second cavity. The second shading member is connected to the side of the partition portion facing the second cavity, so that the partition portion is located between the first shading member and the second shading member. The second shading member is also used to connect to the side of the portion of the body of the sensing chip located in the second cavity, which is away from the substrate, so that the second shading member can cover the gap between the partition portion and the sensing chip.

9. The sensor according to claim 6, characterized in that The top of the sensor chip can abut against the bottom of the partition.

10. The sensor according to any one of claims 1 to 5, characterized in that: The laser is a VCSEL laser, and the sensing chip is a SENSOR chip.

11. The sensor according to any one of claims 1 to 5, characterized in that: The first filter and the second filter are arranged flush with the outer side of the housing at a side away from the accommodating cavity.

12. An electronic device, characterized in that: The electronic device comprises the sensor according to any one of claims 1 to 11.

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