Laser projector and electronic device

Abstract

The utility model belongs to the field of semiconductor technology, concretely is a kind of speckle laser projector, including laser light source;Laser shaping element, keep to the laser of laser light source emission forms multiple dispersed dot-like facula;Substrate, with the shaping element is connected, for giving laser light source power supply;Optical support, be located on the substrate, and the laser shaping element is located on the optical support, wherein, the facula distribution in rectangular region is formed after laser shaping element, and the FOV formed by the facula of this rectangular region is 110 °-135 °.

Description

Technical Field

[0001] This utility model relates to the field of laser technology, and in particular to laser projectors and electronic devices. Background Technology

[0002] As a device capable of projecting lasers, speckle laser projectors have been widely used in daily life, medical equipment, industrial production, and other fields, such as as lidar in robotic vacuum cleaners.

[0003] With the continuous development of speckle laser projectors, the demands on various aspects of speckle laser projectors are also increasing, such as the light output performance and the ease of mounting them on electronic devices. Currently, speckle laser projectors on the market have a narrow field of view (FOV) (typically <90°) during operation, resulting in insufficient horizontal scanning angle, low obstacle detection coverage, and particularly weak ability to identify lateral obstacles; moreover, the uniformly distributed light spot makes it difficult to balance scanning breadth and accuracy in key areas, resulting in insufficient resolution for identifying obstacles directly in front.

[0004] For the reasons mentioned above, there is a need to provide a speckle laser projector that can project a wider field of view. Utility Model Content

[0005] One advantage of this application is that it provides a speckle laser projector in which the laser shaping element reconstructs the light spot into a rectangular distribution area of ​​110°–135° FOV (120° in the embodiment), thereby increasing the horizontal scanning angle, improving scanning accuracy, and enhancing the obstacle avoidance function of the robot vacuum cleaner.

[0006] Another advantage of this application is that it provides a speckle laser projector in which the substrate is an FR4 board instead of a ceramic substrate, and the DB is directly die-bonded on the FR4 board, thereby optimizing material costs while ensuring heat dissipation.

[0007] Another advantage of this application is that it provides a speckle laser projector in which the lens portion is packaged using a Hold Mout encapsulation process instead of the traditional AA process, thereby optimizing the packaging cost while ensuring performance.

[0008] To achieve at least one of the aforementioned advantages or other advantages and objectives, according to one aspect of this application, a speckle laser projector is provided, comprising:

[0009] Laser source;

[0010] The laser shaping element is designed to form multiple dispersed point-like spots from the laser emitted by the laser source.

[0011] A substrate, connected to the shaping element, the substrate comprising a substrate having opposing upper and lower end faces and circuit conductors disposed on the substrate; an optical support, disposed on the substrate, and the laser shaping element disposed on the optical support, wherein...

[0012] The light spot formed by the laser shaping element is distributed within a rectangular area, and the HFOV of the light spot in this rectangular area is 110°-135°.

[0013] In the speckle laser projector according to this application, the VFOV of the light spot formed in the rectangular area is 15°-20°.

[0014] In the speckle laser projector according to this application, the optical support is partially recessed to form a mounting position, and the laser shaping element is disposed on the mounting position.

[0015] In the speckle laser projector according to this application, an exhaust port is provided on the side wall of the mounting position.

[0016] In the speckle laser projector according to this application, the laser source is a VCSEL type source.

[0017] In the speckle laser projector according to this application, the laser shaping element is a projection mirror.

[0018] In the speckle laser projector according to this application, the substrate is an FR4 substrate.

[0019] According to another aspect of this application, an electronic device is also provided, comprising:

[0020] The speckle laser projector as described above; and

[0021] A detector for receiving the laser emitted from the speckle laser projector.

[0022] The further objectives and advantages of this application will become fully apparent from the following description and accompanying drawings.

[0023] These and other objects, features and advantages of this application are fully apparent from the following detailed description, the accompanying drawings and the claims. Attached Figure Description

[0024] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 The illustration shows a speckle pattern of a speckle laser projector according to an embodiment of this application.

[0026] Figure 2 The figure shows a three-dimensional schematic diagram of a speckle laser projector according to an embodiment of the present application.

[0027] Figure 3 The illustration shows a schematic diagram of the unemitted laser of a speckle laser projector according to an embodiment of this application.

[0028] Figure 4 The illustration shows a cross-sectional view of a speckle laser projector according to an embodiment of this application.

[0029] Figure 5 The illustration shows an assembly diagram of the optical support and shaping element of a speckle laser projector according to an embodiment of this application.

[0030] Figure 6 An exploded view of the optical support and shaping element of a speckle laser projector according to another embodiment of this application is shown. Detailed Implementation

[0031] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used only by the inventor to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting this application as defined in the appended claims and their equivalents.

[0032] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0033] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form also includes the plural form, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0035] Application Overview

[0036] As mentioned earlier, speckle laser projectors suffer from drawbacks in practical applications, such as small laser scanning angle and poor laser scanning accuracy.

[0037] The inventor of this utility model has studied the problems existing in the practical application of speckle laser projectors and found that: the laser area emitted by the speckle laser projector is small in angle, and the area it scans for surrounding obstacles is small, resulting in poor obstacle avoidance accuracy.

[0038] This application improves the scanning accuracy and obstacle avoidance function of the sweeping robot by forming a dotted light spot that is also rectangular in shape. This increases the field of view (FOV) of the light spot, increases the scanning angle of the laser projector, and improves the scanning surface.

[0039] Based on this, this application proposes a laser emitter, a laser source; a laser shaping element for forming multiple dispersed point-like light spots from the laser emitted by the laser source; and a substrate connected to the shaping element for supplying power to the laser source; wherein the light spots formed after passing through the laser shaping element are distributed within a rectangular area, and the HFOV formed by the light spots in the rectangular area is 110°-135°, and the VFOV formed is 15°-20°.

[0040] The speckle laser projector of this application is illustrated in detail below through the following examples:

[0041] Reference manual attached Figure 1 To be continued Figure 5 A speckle laser projector according to an embodiment of this application is described; wherein, the speckle laser projector mainly includes a laser source 100, a laser shaping element 200, and a substrate 300. The laser source 100 is implemented as a VCSEL (Vertical-Cavity Surface-Emitting Laser) type source, an EEL (Edge-Emitting Laser) type source, etc. Since VCSEL type sources have advantages such as extremely small active layer volume and extremely low operating threshold; relatively low sensitivity of wavelength and threshold to temperature changes, enabling single-mode emission; circular emission spot, easy coupling with optical fibers; and simple packaging and the ability to form a two-dimensional laser array, this application preferentially selects a VCSEL type source.

[0042] Furthermore, the light shaping element 200 is positioned along the path of the laser beam emitted by the laser source 100. This laser shaping element 200 is used to change the shape of the emitted laser beam spot to achieve the desired function. Specifically, the laser shaping element 200 is a projection mirror; after the laser source 100 is turned on, the laser emitted by the laser source 100 is shaped by the projection mirror into dispersed dot-shaped light spots.

[0043] In this embodiment, the laser light source 100, after passing through the laser shaping element 200, forms a dotted light spot that, within the irradiated area, creates a rectangular light spot region. This rectangular region forms an obstacle avoidance scanning area, thereby increasing the obstacle avoidance scanning width and accuracy of the sweeping robot during operation. In this embodiment, the HFOV (horizontal field of view) of the rectangular region is 120°, and the VFOV (vertical field of view) is 17°.

[0044] Specifically, the light spot distribution within the rectangular area is non-uniform, with the light spot density in the center of the rectangular area being greater than that on the sides. Specifically, the light spot size in the center of the rectangular area is 5mm @ 1m; the light spot size on the sides of the rectangular area is 25mm @ 1m.

[0045] Furthermore, the laser light source 100 is mounted on the substrate 300. Specifically, the substrate 300 is implemented as a ceramic substrate, which includes a ceramic substrate and a circuit layer formed on the ceramic substrate. It should be understood that the substrate 300 can also be implemented as other types of substrates, and the laser light source 200 can also be electrically connected to the substrate 300 in other ways, which is not limited to this application. A conductor 301 is connected on the substrate, which supplies current to the circuit layer 301 on the substrate 300 to illuminate the laser light source. The conductor 301 is an FPC, and different conductive lines can be selected as needed.

[0046] An optical support 400, made of black PC, is disposed on the substrate 300. The bottom of the optical support 400 is glued to the substrate 300, and the optical support 400 encloses all the aforementioned laser light sources 200. The laser shaping element 200 is mounted on the optical support 400 and fixedly connected by an adhesive layer. Specifically, the top of the optical support 400 is recessed downward to form a stepped mounting position 401, and the laser shaping element 200 is located within the mounting position 401. Furthermore, an vent hole 402 is formed in the recess of the inner wall of the mounting position 401, through which air is expelled when the laser shaping element 200 is glued to the mounting position.

[0047] Indicative electronic devices

[0048] According to another aspect of this application, an electronic device is also provided, comprising a speckle laser projector as described above and a detector for receiving the laser emitted from the speckle laser projector. The speckle laser projector is capable of projecting a line of light with edge laser energy stronger than the center laser energy to compensate for the edge light received by the detector, thereby optimizing detection performance. The specific structure and function of the speckle laser projector have been described above. Figures 1 to 6 The illustrated speckle laser projector is described in detail, and therefore, its repeated description will be omitted.

[0049] The electronic device can be implemented as a robotic vacuum cleaner, or as other devices that require a speckle laser projector capable of projecting a line-shaped laser spot with edge laser energy stronger than the center laser energy.

[0050] It should be noted that in the apparatus and method of this application, the components or steps in different embodiments can be disassembled and / or recombined without departing from the principle of this utility model. These disassemblies and / or recombinations should be considered as included within the inventive concept of this application.

[0051] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

Claims

1. A laser projector, characterized in that, include Laser source; The laser shaping element is designed to form multiple dispersed point-like spots from the laser emitted by the laser source. A substrate, connected to the shaping element, is used to supply power to the laser source; An optical support is disposed on the substrate, and the laser shaping element is disposed on the optical support, wherein... The light spot formed by the laser shaping element is distributed within a rectangular area, and the HFOV of the light spot in this rectangular area is 110°-135°.

2. The laser projector according to claim 1, characterized in that, The VFOV formed by the light spot in the rectangular area is 15°-20°.

3. The laser projector according to claim 1, characterized in that, The optical bracket is partially recessed to form a mounting position, and the laser shaping element is disposed on the mounting position.

4. The laser projector according to claim 3, characterized in that, The optical bracket is fixed to the laser shaping element by an adhesive layer.

5. The laser projector according to claim 3, characterized in that, An exhaust vent is provided on the side wall of the mounting position.

6. The laser projector according to claim 1, characterized in that, The laser source is a VCSEL type light source.

7. The laser projector according to claim 1, characterized in that, The laser shaping element is a projection mirror.

8. The laser projector according to claim 1, characterized in that, The substrate is an FR4 substrate.

9. An electronic device, characterized in that, include The laser projector as described in any one of claims 1-8; and A detector for receiving the laser emitted from the laser projector.

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