CN219916093U - Floodlight projection module, projection module and electronic equipment - Google Patents

Abstract

The utility model relates to a floodlight projection module, a projection module and electronic equipment, wherein the floodlight projection module comprises: a substrate; the LED is arranged on one side of the substrate; the bracket is arranged on one side of the substrate facing the LED so as to surround the LED; the light shaper is arranged in the bracket and positioned on the light path of the LED; the LED is used for emitting a first incident light beam, and the light shaper is used for shaping the first incident light beam to project a floodlight field with uniform light intensity distribution towards a target field of view. The technical scheme provided by the embodiment of the utility model can improve the illumination effect, realize uniform light filling and is beneficial to improving the imaging quality of the imaging module.

Description

Floodlight projection module, projection module and electronic equipment

Technical Field

The utility model belongs to the technical field of optical imaging, and particularly relates to a floodlight projection module, a projection module and electronic equipment.

Background

The structured light projection module in the prior art comprises a floodlight projection module and a laser projection module, wherein the floodlight projection module is used for illuminating an object in a view field, and the laser projection module is used for projecting a laser beam with a special pattern onto the surface of the object, so that the acquisition module receives the laser beam reflected by the object and forms a structured light image.

At present, a floodlight projection module in a structured light projection module mostly adopts a single LED light source, the light intensity in the middle of a light field output by the single LED light source is high, the light intensity at the edge is low, the light intensity distribution is uneven, the uneven brightness distribution of the projected light field is caused, the uniform light supplementing is not facilitated, and the imaging quality of a structured light image is reduced. Along with the increasing demand for miniaturization of the structured light projection module, a spot floodlight switching projection module is also provided, and the spot floodlight switching projection module adopts a plurality of lasers as light sources, and floodlight fields are projected out through defocusing lasers for light supplementing, but speckle interference noise can appear on the surface of an object under the influence of coherence of laser, so that the imaging quality of a structured light image can be reduced.

Disclosure of Invention

The utility model aims to at least solve the defects in the prior art to a certain extent and provides a floodlight projection module, a projection module and electronic equipment.

In order to achieve the above object, the present utility model provides a floodlight projection module, comprising: a substrate; the LED is arranged on one side of the substrate; the bracket is arranged on one side of the substrate facing the LED so as to surround the LED; the light shaper is arranged in the bracket and positioned on the light path of the LED; the LED is used for emitting a first incident light beam, and the light shaper is used for shaping the first incident light beam to project a floodlight field with uniform light intensity distribution to a target field of view.

In one embodiment, the light shaper is one of a diffractive optical element, a diffusive optical element and a refractive optical element.

In one embodiment, the spectral width of the LED is between 20nm and 40 nm.

In one embodiment, the floodlight projection module further comprises: and the collimating mirror is positioned between the LED and the light shaper.

The utility model also provides a projection module, comprising: the laser projection module and the floodlight projection module of any embodiment are suitable for projecting a speckle light field or a linear light field to a target field of view.

In one embodiment, the laser projection module is integrated with the floodlight projection module, the laser projection module comprises a laser, the laser is arranged on the substrate and is positioned beside the LED, and the light shaper is positioned on the light path of the laser; the laser is used for emitting a second incident light beam, and the second incident light beam is projected into a target field of view through the light shaper to form a speckle light field or a linear light field.

In one embodiment, the projection module further comprises a collimating lens, wherein the collimating lens is arranged in the bracket and is positioned at one side of the light shaper facing the substrate; the laser is positioned at the focal plane position of the collimating mirror, and the distance between the LED and the collimating mirror is equal to or larger than the focal length of the collimating mirror.

In one embodiment, the substrate is provided with a control circuit, which is connected to the LED and the laser, respectively; the control circuit is used for turning on the LEDs and turning off the lasers; or, turning on the laser and turning off the LED; or, turn on the LED and laser.

The utility model also provides electronic equipment, which comprises the floodlight projection module, the laser projection module and the acquisition module in any one of the embodiments; the electronic equipment is provided with a display panel, the display panel is provided with a display area and a frame area, the frame area is positioned at the periphery of the display area, and the display area is provided with a display screen; the floodlight projection module is suitable for setting a display area and is positioned below the display screen, and the laser projection module and the acquisition module are both suitable for setting the display area or the frame area.

The utility model also provides electronic equipment, which comprises the projection module and the acquisition module in any one of the embodiments; the electronic equipment is provided with a display screen, and the projection module and/or the acquisition module are/is suitable for being arranged in the display area and positioned below the display screen.

According to the embodiment of the utility model, the LED is provided with the light shaper, the light shaper is utilized to shape the first incident light beam emitted by the LED and project the floodlight field with uniform light intensity distribution to the target view field, so that the illumination brightness effect can be improved, the acquisition module can receive the structured light image with uniform brightness distribution, and the imaging quality of the acquisition module can be improved. And the floodlight field can also compensate the light intensity at the edge of the target view field, which is more beneficial to widening the effective area of the target view field.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model and that other drawings may be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a floodlight projection module according to the present utility model;

FIG. 2 is a graph showing the effect of the floodlight field provided by the floodlight projection module of FIG. 1;

FIG. 3 is a graph showing the effect of a floodlight field provided by a floodlight projection module according to the prior art;

FIG. 4 is a schematic view of a first incident light beam emitted by an LED projected through a diffractive optical element;

FIG. 5 is a schematic view of a second incident beam emitted by a laser projected through a diffractive optical element;

FIG. 6 is a schematic diagram of a second structure of the floodlight projection module according to the present utility model;

FIG. 7 is a schematic diagram of a first structure of a projection module according to the present utility model;

FIG. 8 is a schematic diagram of a second structure of the projection module according to the present utility model;

FIG. 9 is a schematic diagram of a third configuration of a projection module according to the present utility model;

FIG. 10 is a schematic diagram of a fourth configuration of a projection module according to the present utility model;

FIG. 11 is a schematic diagram of a first configuration of an electronic device according to the present utility model;

FIG. 12 is a graph of the effect of flood light field provided by an off-screen laser of the prior art;

fig. 13 is a schematic diagram of a second structure of the electronic device of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Fig. 1 is a schematic diagram of a first structure of a floodlight projection module according to the present utility model. Referring to fig. 1, the floodlight projection module 10 includes a substrate 11, an LED (Light-Emitting Diode) 12, a bracket 13 and a Light shaper 14. The LED12 is disposed on one side of the substrate 11, and the bracket 13 is disposed on the side of the substrate 11 facing the LED12 to surround the LED12. The light shaper 14 is arranged inside the holder 13 and on the light path of the LED12. Wherein the LED12 is configured to emit a first incident light beam a11, and the light shaper 14 is configured to shape the first incident light beam a11 to project a floodlight field with a uniform light intensity distribution toward a target field of view (not shown in the figure). Preferably, the support 13 may be a housing, the LEDs 12 and the light shaper 14 being spaced apart within the housing.

For example, referring to fig. 1 and 2, the LED12 is a surface light source, the first incident light beam a11 emitted by the LED12 is a surface light beam, the light shaper 14 shapes the surface light beam and projects a corresponding first outgoing light beam a12 toward the target field of view, and the first outgoing light beam a12 forms a floodlight field with uniformly distributed light intensity in the target field of view. The uniform light intensity distribution refers to a surface-shaped light spot with uniform light intensity obtained by projecting the first outgoing light beam a12 onto a projection plane at a certain position in the target field of view, for example, fig. 2 shows a circular light spot with uniform light intensity obtained by projecting the first outgoing light beam a12 onto the projection plane.

Compared with the prior art that a single-point LED is adopted as the floodlight projection module, the light shaper 14 is arranged on the emergent light path of the LED12, the light shaper 14 is utilized to shape the first incident light beam a11 emitted by the LED12 and project a floodlight field with uniform light intensity distribution toward the target view field, so that the illumination brightness effect can be improved, and when the floodlight projection module 10 is utilized to supplement light, the collection module is facilitated to receive a structured light image with uniform brightness distribution, and the imaging quality of the structured light image is improved. And the light intensity at the edge of the emergent light field can be compensated, which is more beneficial to widening the effective area of detection.

It should be noted that, in the prior art, the LED is directly provided with a floodlight projection module, and the floodlight field projected by the floodlight projection module is high in light intensity in the middle area and low in light intensity in the edge area. In order to eliminate the lens shadow effect of the collection module, it is generally desirable that the light intensity distribution of the floodlight field projected is uniform. The floodlight field with uniformly distributed light intensity provided by the floodlight projection module 10 of the embodiment is also beneficial to eliminating the lens shadow effect of the acquisition module, thereby improving the imaging quality of the acquisition module.

Compared with the prior art that the floodlight projection module is arranged by adopting the spot floodlight switching module or the spot light switching module, the embodiment adopts the LED to replace the laser as the light source of the floodlight projection module 10, and the coherence influence of the laser light source can not occur due to the wide spectrum characteristic of the LED, so that speckle interference noise can not occur on the surface of an object when the floodlight projection module 10 of the embodiment is utilized to illuminate the object in the field of view, and the imaging quality of a structural light image can be improved when the structural light projection module is supplemented with light. In addition, referring to fig. 3, in the floodlight projection module of the prior art, a floodlight field projected by the defocusing laser is formed by splicing a plurality of floodlight beams, the light intensity of the spliced edge is high, and the spliced edge can generate noise on a structured light image collected by the collection module during light supplementing, for example, when the structured light image is used for carrying out face recognition and other application scenes, the face recognition precision can be reduced. In this embodiment, the LED is used as the light source of the floodlight projection module 10 instead of the laser, and because the LED is a surface light source, a surface light beam with a relatively uniform light intensity distribution can be emitted, and the projected floodlight field is modulated by the light shaper, so that a splicing edge with a relatively high light intensity does not appear.

It should be noted that the floodlight projection module 10 of the present embodiment is suitable for Face authentication in the scenes of Face payment, face recognition, etc. using the structured light technology, for example, for Face ID. The floodlight projection module 10 is also suitable for use as a floodlight source for an under-screen IR (Infrared Radiation, infrared) imaging technique and an under-screen iTOF (indirect Time-of-Flight) technique.

In one embodiment, the light shaper 14 is one of a diffractive optical element (Diffractive Optical Elements, DOE), a diffusive optical element, and a refractive optical element.

As an alternative embodiment, the light shaper 14 is a diffractive optical element. By utilizing the characteristic that the diffraction optical element accurately controls the light intensity distribution, the first emergent light beam A12 can be controlled to compensate the light intensity of the edge area of the floodlight field to form the floodlight field with uniform light intensity distribution, and at the moment, the first emergent light beam A12 is controlled to compensate the light intensity of the edge area of the emergent light field by regulation and control, so that the effective area of detection is widened.

The following is a comparison of FIGS. 4 and 5The light projection module 10 employs LEDs 12 and lasers as light field effects for the light source. The first incident light beam a11 emitted by the LED12 is diffracted by the diffractive optical element 14A to form a first outgoing light beam a12. The second incident beam a21 emitted by the laser is diffracted by the diffractive optical element 14A to form a second outgoing beam a22. Assuming that the diffractive optical element 14A in fig. 4 and 5 are the same, and that the distances between the diffractive optical element 14A and the projection plane P are both H, the incident angles of the first incident light beam a11 and the second incident light beam a21 are both 0 °, the spot sizes of the first incident light beam a11 and the second incident light beam a21 projected onto the diffractive optical element 14A are the same and are both D, the spectral width of the LED12 is λ ₁ -λ ₂ Spectral width lambda of laser ₃ -λ ₄ Less than the spectral width of the LED12, e.g., the spectral width of the laser is about 1nm, and the spectral width of the LED12 is greater than 1nm. Wherein lambda is ₁ And lambda (lambda) ₂ Two wavelengths corresponding to half of the maximum intensity of the spectrum curve of the LED; lambda (lambda) ₃ And lambda (lambda) ₄ Respectively two wavelengths corresponding to half of the maximum intensity of the spectral curve of the laser.

The sin theta=kλ/d is obtained by the deformable grating equation dsin theta=kλ, where d is a grating constant, θ is a diffraction angle of the incident beam, k is a main maximum number of steps, and the value of k may be 0, ±1, ±2, …, and λ is a wavelength of the incident beam. As can be seen from this, when the diffraction optical element 14A is the same and the incidence angle is the same, the wavelength of the light source is positively correlated with the diffraction angle.

Further, from the deformation formula of the grating equation, sin θ ₁ -sinθ ₂ ＝(λ ₁ -λ ₂ )×k/d，sinθ ₃ -sinθ ₄ ＝(λ ₃ -λ ₄ ) X k/d, where θ ₁ Is the first incident light beam A11 with the wavelength lambda ₁ Diffraction angle, θ of the light beam ₂ Is the first incident light beam A11 with the wavelength lambda ₂ Diffraction angle, θ of the light beam ₃ Is the wavelength lambda of the second incident light beam A21 ₃ Diffraction angle, θ of the light beam ₄ Is the wavelength lambda of the second incident light beam A21 ₄ The diffraction angle of the beam of (a) can thus be determined to which the first outgoing beam a12 is projectedThe spot size formula for projection plane P is as follows:

D+H×(sinθ ₁ -sinθ ₂ )＝D+H×(λ ₁ -λ ₂ ) X k/d formula (1).

And determining a spot size formula of the second emergent beam A22 projected to the projection plane P as follows:

D+H×(sinθ ₃ -sinθ ₃ )＝D+H×(λ ₃ -λ ₄ ) X k/d formula (2).

From the above formula (1) and formula (2), it can be seen that due to lambda ₁ -λ ₂ Greater than lambda ₃ -λ ₄ The spot size of the first outgoing light beam a12 projected onto the projection plane P is larger than the spot size of the second outgoing light beam a22 projected onto the projection plane P. Based on the above deduction, since the spectral width of the LED12 is larger than that of the laser, the diffraction angle of the first outgoing beam a12 is larger after the first incoming beam a11 emitted by the LED12 is diffracted by the diffractive optical element 14A, so that the floodlight field formed by overlapping the first outgoing beam a12 is more uniform.

As an alternative embodiment, the light shaper 14 is a diffusing optical element, such as a diffuser plate. The light shaper is set as a diffusion optical element, and the diffusion optical element can be utilized to perform light homogenizing treatment on the first incident light beam A11 so as to project a floodlight field with uniform light intensity distribution.

As an alternative embodiment, the light shaper 14 is a refractive optical element, such as a wave plate. The light shaper is arranged as a refractive optical element, and the refractive optical element can be used for performing divergent processing on the first incident light beam A11 so as to project a floodlight field with uniformly distributed light intensity.

In one embodiment, as shown in fig. 6, the floodlight projection module 10 further comprises a collimator lens 15. A collimator lens 15 is located between the LED12 and the light shaper 14 for collimating the first incident light beam a11 emitted by the LED12.

In one embodiment, the spectrum width of the LED12 is between 20nm and 40nm (including the end point value), and the spectrum width of the LED12 is larger than that of the laser, and compared with the scheme of using the laser as the floodlight projection module in the prior art, the embodiment can provide a floodlight field with more uniform light intensity distribution.

The utility model also provides a projection module. Fig. 7 is a schematic diagram of a first structure of the projection module according to the present utility model. The projection module 1 comprises a laser projection module (not labeled in the figure) and the floodlight projection module 10 according to any of the above embodiments. Since the projection module 1 adopts all the technical solutions of all the embodiments, at least the beneficial effects brought by the technical solutions of the embodiments are provided, and will not be described in detail herein. The laser projection module is suitable for projecting a speckle light field or a linear light field to the target field of view. Alternatively, the flood projection module 10 and the laser projection module may be integrated on the same substrate 11, or may be separately disposed on two separate substrates. The arrangement modes of the floodlight projection module 10 and the laser projection module can be selected and adjusted according to actual needs.

In one embodiment, referring to fig. 7, the laser projection module is integrated with the floodlight projection module 10, for example, the laser projection module and the floodlight projection module 10 share the substrate 11 and the light shaper 14, which can simplify the structure and reduce the manufacturing cost. In addition, compared with the scheme of separately setting the floodlight projection module 10 and the laser projection module, the projection module 1 of the embodiment integrates the laser projection module and the floodlight projection module 10, so that the number of openings can be reduced when the floodlight projection module is applied under the screen.

The laser projection module comprises a laser 21, the laser 21 is arranged on the substrate 11 and beside the LED12, and the light shaper 14 is arranged on the light path of the laser 21. Illustratively, the Laser 21 may be a VCSEL (Vertical-Cavity Surface-Emitting Laser) array, which may be a regular Laser array or an irregular Laser array. The laser 21 is configured to emit a second incident light beam a21, where the second incident light beam passes through the optical shaper 14 and then projects a speckle light field or a linear light field toward the target field of view. Compared with the prior art, two lasers are respectively arranged as the light sources of the floodlight projection module and the laser projection module, the LED12 is utilized to replace the laser of the floodlight projection module in the prior art, so that the light intensity uniformity of a floodlight field provided by the floodlight projection module 10 can be improved, and the manufacturing cost of the projection module 1 can be reduced.

In one embodiment, referring to fig. 8, the projection module 1 further includes a collimator lens 15, the collimator lens 15 is disposed inside the bracket 13 and located on a side of the light shaper 14 facing the substrate 11, and the collimator lens 15 is configured to collimate the first incident light beam a11 emitted by the LED12 and the second incident light beam a21 emitted by the laser 21.

Alternatively, the laser 21 and the LED12 may both be located at the focal plane position of the collimator lens 15, where the distance between the LED12 and the collimator lens 15 is equal to the focal length of the collimator lens 15; alternatively, the laser 21 is arranged at the focal plane position of the collimator lens 15, and the distance between the LED12 and the collimator lens 15 is arranged to be larger than the focal length of the collimator lens 15. For example, referring to fig. 9, by adding the raising stage 16 only between the laser 21 and the substrate 11, the laser 21 is located at the focal plane position of the collimator lens 15, and the distance between the LED12 and the collimator lens 15 is larger than the focal length of the collimator lens 15, and the raising stage 16 is electrically connected to both the substrate 11 and the laser 21. For another example, referring to fig. 10, a groove 11A is disposed on a side of the substrate 11 facing the collimator lens 15, and a surface of the substrate 11 adjacent to the collimator lens 15 is located at a focal plane position of the collimator lens 15, so that by disposing the laser 21 on the surface of the substrate 11 adjacent to the collimator lens 15 and disposing the LED12 in the groove 11A, the laser 21 can be located at the focal plane position of the collimator lens 15 and a distance between the LED12 and the collimator lens 15 can be greater than a focal length of the collimator lens 15.

In the prior art, the distance between the laser and the collimator lens needs to be reduced when the floodlight field is projected through the defocused laser, in this embodiment, since the LED12 is a surface light source, the first incident light beam a11 emitted by the LED is a surface light beam with relatively uniform light intensity, when the LED12 and the laser 21 are arranged at the focal plane position of the collimator lens 15 together, the floodlight field with uniformly distributed light intensity can be provided, so that defocusing treatment is not needed. Furthermore, because the emission power of the LED12 is high, by setting the distance between the LED12 and the collimator lens 15 to be equal to or greater than the focal length of the collimator lens 15, the defocus processing can be performed so that the light intensity distribution emitted by the LED is more uniform, and the heat generated by the LED12 can be prevented from burning the collimator lens 15.

In one embodiment, the substrate 11 is provided with a control circuit (not shown in the figure) connected to the LED12 and the laser 21, respectively. The control circuit is used to turn on the LED12 and turn off the laser 21; or, turn on the laser 21 and turn off the LED12; or, the LED12 and the laser 21 are turned on. Thus, the projection module 1 can be controlled to switch the floodlight field and the speckle light field (i.e. point floodlight switching), or switch the floodlight field and the bar light field (i.e. point linear light switching), or generate the floodlight field and the bar light field simultaneously, so as to adapt to different application scenes.

Fig. 11 is a schematic diagram of a first structure of an electronic device according to the present utility model. The electronic device 100 includes the floodlight projection module 10, the laser projection module 20 and the collection module 30 according to any of the above embodiments. The floodlight projection module 10 is adapted to project a floodlight field toward a target field of view, the laser projection module 20 is adapted to project a structured light beam, such as a speckle beam or a fringe beam, onto a surface of an object within the target field of view, and the laser beam may form a speckle or fringe field in the target field of view. The acquisition module 30 is adapted to receive the laser beam reflected back from the object surface to form a structured light image. The electronic device 100 may be a depth camera, a smart phone, a smart wearable device, or the like capable of image acquisition.

The electronic device 100 is provided with a display panel 110, the display panel 110 has a display area 110A and a frame area 110B, the frame area 110B is located at the periphery of the display area 110A, and the display area 110A is provided with a display screen 120. The display 120 includes, but is not limited to, an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode). The floodlight projection module 10 is suitable for setting any position of the display area 110A and is located below the display screen 120, and the laser projection module 20 and the collection module 30 are both suitable for setting the display area 110A or the frame area 110B. By disposing the floodlight projection module 10 at any position of the display area 110A and under the display screen 120, the screen duty ratio of the electronic device 100 can be increased.

Referring to fig. 12, in the prior art, when a floodlight projection module using a laser as a light source is disposed below a display screen, the coherence length of a laser beam is long, so that a light field projected by the laser beam after passing through the display screen forms an interference ring, which reduces the imaging quality of the acquisition module, and particularly, when the floodlight projection module is used for supplementing light, the imaging quality of the structural light is reduced. Above-mentioned scheme adopts LED12 to replace the light source of floodlight projection module 10 in projection module 1, makes it can not produce the interference ring when setting up in the below of display screen 120, improves the imaging quality of collection module to and improve the imaging quality of structure light image when the light filling.

Fig. 13 is a schematic diagram of a second structure of the electronic device according to the present utility model. The electronic device 100 includes the projection module 1 and the collection module 30 of any of the above embodiments, where the projection module 1 is configured to project a floodlight field toward a target field of view to illuminate an object in the target field of view, and the projection module 1 is further configured to project a structured light beam, such as a speckle beam or a stripe beam, toward a surface of the object. The acquisition module 30 is adapted to receive the laser beam reflected back from the object surface to form a structured light image.

In one embodiment, referring to fig. 13, the electronic device 100 is provided with the display panel 110, and the structure of the display panel 110 can be referred to as the above example and is described herein. The projection module 1 and/or the acquisition module 30 are/is adapted to be disposed at any position of the display area 110A and under the display screen 120. For example, the projection module 1 and the collection module 30 may be disposed at the edge of the display area 110A adjacent to the border area 110B and below the display screen 120. Alternatively, either one of the projection module 1 and the collection module 30 may be disposed at an arbitrary position of the display area 110A and under the display screen 120, and the other may be disposed at the frame area 110B. In this embodiment, the projection module 1 and/or the acquisition module 30 are disposed below the display screen 120, so as to increase the screen ratio of the electronic device 100.

Referring to fig. 11 and 13 together, the electronic device 100 may further include a processor 40, where the processor 40 may be disposed in the display area 110A and under the display screen 120. The processor 40 is arranged to receive and process the structured light image, for example to calculate depth information of the object based on a structured light algorithm. The processor 40 may also apply the structured light image to applications such as matting, background blurring, face recognition, face unlocking, face payment, etc., and may also apply the structured light image to a display screen for display. The processor 40 is also used for overall control of the entire electronic device 100, and the processor 40 may be a single processor or may comprise a plurality of processor units, such as processor units with different functions.

In some embodiments, the processor 40 may also be an integrated system-on-chip, including a central processing unit, an on-chip memory, a controller, a communication interface, and the like. In some embodiments, the processor 40 is an application processor, such as a mobile application processor, primarily responsible for implementation of functions other than communication in the electronic device 100, such as text processing, image processing, face recognition, and the like.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.

The foregoing is a description of the embodiments of the present utility model, and is not to be construed as limiting the utility model, since modifications in the detailed description and the application scope will become apparent to those skilled in the art upon consideration of the teaching of the embodiments of the present utility model.

Claims (10)

1. A floodlight projection module, comprising:

a substrate;

an LED arranged on one side of the substrate;

a bracket arranged on one side of the substrate facing the LED to surround the LED;

the light shaper is arranged in the bracket and positioned on the light path of the LED;

the LED is used for emitting a first incident light beam, and the light shaper is used for shaping the first incident light beam to project a floodlight field with uniform light intensity distribution to a target field of view.

2. The flood light projection module of claim 1, wherein the light shaper is one of a diffractive optical element, a diffusive optical element, and a refractive optical element.

3. The flood light projection module of claim 1, wherein the LED has a spectral width between 20nm and 40 nm.

4. A floodlight projection module according to any of claims 1 to 3, further comprising:

and a collimator mirror positioned between the LED and the light shaper.

5. A projection module, comprising: a laser projection module and a floodlight projection module according to any of claims 1 to 3, said laser projection module being adapted to project a speckle or linear light field towards said target field of view.

6. The projection module of claim 5, wherein the laser projection module is integrated with the flood projection module, the laser projection module comprises a laser, the laser is arranged on the substrate and beside the LED, and the light shaper is positioned on the optical path of the laser;

the laser is used for emitting a second incident light beam, and the second incident light beam passes through the light shaper and then projects the speckle light field or the linear light field to the target field of view.

7. The projection module of claim 6, further comprising a collimator lens disposed inside the bracket and on a side of the light shaper facing the substrate;

the laser is positioned at the focal plane position of the collimating mirror, and the distance between the LED and the collimating mirror is equal to or greater than the focal length of the collimating mirror.

8. The projection module of claim 6, wherein the substrate is provided with a control circuit, the control circuit being connected to the LED and the laser, respectively;

the control circuit is used for turning on the LEDs and turning off the lasers; or, turning on the laser and turning off the LED; or, turning on the LED and the laser.

9. An electronic device, comprising the floodlight projection module, the laser projection module and the acquisition module according to any one of claims 1 to 4;

the electronic equipment is provided with a display panel, the display panel is provided with a display area and a frame area, the frame area is positioned at the periphery of the display area, and the display area is provided with a display screen;

the floodlight projection module is suitable for setting the display area and is positioned below the display screen, and the laser projection module and the acquisition module are both suitable for setting the display area or the frame area.

10. An electronic device, comprising the projection module and the acquisition module according to any one of claims 5 to 8;

the electronic equipment is provided with a display panel, the display panel is provided with a display area and a frame area, the frame area is located at the periphery of the display area, the display area is provided with a display screen, and the projection module and/or the acquisition module is/are suitable for being arranged in the display area and located below the display screen.