CN215986871U

CN215986871U - Light source module, optical fiber scanning imaging device and intelligent glasses

Info

Publication number: CN215986871U
Application number: CN202121396651.9U
Authority: CN
Inventors: 不公告发明人
Original assignee: Chengdu Idealsee Technology Co Ltd
Current assignee: Chengdu Idealsee Technology Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-03-08
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a light source module, an optical fiber scanning imaging device and intelligent glasses, wherein the light source module comprises: a plurality of COS light sources; a plurality of collimating lenses; the beam combining component comprises a beam combining base body, the beam combining base body comprises a first light passing surface and a second light passing surface which are opposite, and a plurality of filter plates with different cut-off wavelengths are arranged on the first light passing surface; the second light-passing surface comprises an internal reflection area and a light-emitting area; and light emitted by the plurality of COS light sources enters from the first light-passing surface, is combined into a beam by the filter plate and is reflected by the internal reflection area, and then is combined into a beam and is emitted from the light-emitting area. In the scheme, the beam combining assembly adopts a mode of arranging a plurality of filters with different cut-off wavelengths on the beam combining base body, in the light combining process, the incident direction and the emergent direction of a light beam are the same direction, the light source and the receiving optical fiber are in the parallel direction, and the size of the device can be very small, so that the possibility is provided for meeting the light source miniaturization requirement of the head-mounted display equipment.

Description

Light source module, optical fiber scanning imaging device and intelligent glasses

Technical Field

The utility model relates to the field of projection imaging, in particular to a light source module, an optical fiber scanning imaging device and intelligent glasses.

Background

With the development of science and technology, the intelligent glasses have gradually merged into the lives of people. The intelligent glasses are a general name of glasses which have an independent operating system like a smart phone, can be provided with programs provided by software service providers such as software and games, can complete functions of adding schedules, map navigation, interacting with friends, taking photos and videos, developing video calls with friends and the like through voice or action control, and can realize wireless network access through a mobile communication network.

At the present stage, the size of the display screen is limited, the size of the intelligent glasses is very large, the same form of the common glasses cannot be achieved, the user is easy to feel uncomfortable after wearing for a long time, and the wearing experience is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a light source module, an optical fiber scanning imaging device and intelligent glasses, which are used for solving the technical problem that the existing intelligent glasses are large in size, and the user experience is improved by reducing the size of the intelligent glasses.

In order to achieve the above object of the present invention, a first aspect of an embodiment of the present invention provides a light source module, including: a plurality of chip substrate bonding COS light sources;

the plurality of collimating lenses are arranged on emergent light paths of the plurality of COS light sources, and the plurality of collimating lenses correspond to the plurality of COS light sources one to one;

the beam combining assembly is arranged on an emergent light path of the collimating lenses and comprises a beam combining base body, the beam combining base body comprises a first light passing surface and a second light passing surface which are opposite, and a plurality of filter plates with different cut-off wavelengths which correspond to the COS light sources one to one are arranged on the first light passing surface; the second light-passing surface comprises an internal reflection area and a light-emitting area; the light emitted by the plurality of COS light sources enters from the first light-passing surface, is combined into a beam by the plurality of filters with different cut-off wavelengths and is reflected by the internal reflection area, and then is combined into a beam and is emitted from the light-emitting area;

and the coupling lens is used for coupling the light emitted by the beam combining component into an optical fiber.

Optionally, the plurality of filter plates with different cut-off wavelengths are glued on the first light passing surface.

Optionally, the internal reflection region is plated with an internal reflection film; and the light emitting area is plated with an antireflection film.

Optionally, the beam combining substrate is a glass substrate.

Optionally, after light emitted by the plurality of COS light sources is collimated by the corresponding collimating lenses, the light is obliquely incident to the corresponding filters; and the included angle between the incident direction of the light emitted by the COS light sources and the normal of the filter is 6-15 degrees.

Optionally, each COS light source includes a light emitting chip, and a plurality of light emitting chips of the plurality of COS light sources are disposed on one chip heat sink; or

Each COS light source comprises a light-emitting chip and chip heat sinks, wherein the light-emitting chip is arranged on the chip heat sink, and the chip heat sinks are arranged on one transition heat sink.

Optionally, the light source module includes a base, a hollow cavity is formed in the base, and the plurality of COS light sources, the plurality of collimating lenses, and the beam combining assembly are disposed in the cavity;

the base comprises a base body and a plurality of positive electrodes arranged on the right side of the base body side by side, and the positive electrodes on the base body correspond to the positive electrodes of the COS light sources one by one; and the negative electrodes of the plurality of COS light sources are connected in series and then connected with the negative electrode on the left side of the base body.

Optionally, the coupling lens is embedded in the left side wall of the base body, and the coupling lens and the base body are fixed by sintering glass solder.

A second aspect of the embodiments of the present invention provides an optical fiber scanning imaging device, including the light source module and the optical scanning module described in the first aspect, where light emitted from the light source module is scanned and output by the optical scanning module and then is used as display image light; the optical scanning module comprises an actuator, an optical fiber output end in the light source module is fixed on the actuator, the optical fiber exceeds the actuator and forms an optical fiber cantilever, and the optical fiber cantilever is driven by the actuator to sweep in a three-dimensional space.

A third aspect of an embodiment of the present invention provides smart glasses, including: the optical fiber scanning imaging device comprises a lens, a frame for accommodating the lens, glasses legs arranged on two sides of the frame and at least one optical fiber scanning imaging device according to the second aspect; the optical scanning module is arranged inside the glasses legs or on the glasses frame; the light source module is arranged inside the free end of the glasses leg far away from the glasses frame, or the light source module is arranged separately from the glasses leg; the emergent light of the light source module is transmitted to the light scanning module through an optical fiber.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

in the scheme of the utility model, the beam combining component adopts a mode that a plurality of filters with different cut-off wavelengths are arranged on the beam combining substrate, in the light combining process, the incident direction and the emergent direction of a light beam are the same, and the light emitting source and the receiving optical fiber are in the parallel direction, so that the size of the device can be made very small, thereby providing possibility for meeting the requirement of miniaturization of a light source of the head-mounted display equipment.

On the other hand, the light source adopts the COS light source, compares other laser instrument package modes, and COS package light source can densely arrange, can reduce the volume of light source module, and then reduces intelligent glasses's volume, promotes the user and wears the travelling comfort.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise:

FIGS. 1A-1B are schematic structural diagrams of a fiber scanning imaging system according to an embodiment of the utility model;

fig. 2A is a cross-sectional view of a light source module according to an embodiment of the utility model;

fig. 2B is a side view of a light source module according to an embodiment of the utility model;

fig. 3 is a schematic diagram illustrating a light path propagation of a light source module according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a possible beam combining assembly according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of oblique incidence of a light beam according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a possible electrode arrangement provided by an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a possible COS light source according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a possible pigtail assembly provided by an embodiment of the utility model;

FIG. 9 is a schematic structural diagram of a pigtail assembly coupled to a base according to an embodiment of the utility model;

FIG. 10 is a schematic structural diagram of a possible fiber scanning imaging apparatus according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a possible smart glasses according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this specification, a fiber scanning imaging system will be described first. The optical fiber scanning imaging system utilizes an actuator in an optical fiber scanner to drive an optical fiber to vibrate at a high speed, and is matched with a laser modulation algorithm to realize the display of image information. As shown in fig. 1A, a conventional fiber scanning imaging system mainly includes: the optical fiber laser comprises a processor 100, a laser module 110, a fiber scanner 120, a transmission fiber 130, a light source modulation circuit 140, a scanning driving circuit 150 and a beam combining unit 160.

The processor 100 may be a Graphics Processing Unit (GPU), a Central Processing Unit (CPU), or other chips or circuits having a control function and an image Processing function, and is not limited in particular.

When the system is in operation, the processor 100 may control the light source modulation circuit 140 to modulate the laser module 110 according to the image data to be displayed. The laser module 110 includes a plurality of monochromatic lasers, which respectively emit light beams of different colors. As shown in fig. 1A, three-color lasers of Red (R), Green (G) and Blue (B) can be specifically used in the laser module. The light beams emitted by the lasers in the laser module 110 are combined into a laser beam by the beam combining unit 160 and coupled into the transmission fiber 130.

The processor 100 can also control the scan driving circuit 150 to drive the fiber scanner 120 to scan out the light beam transmitted in the transmission fiber 130.

The light beam scanned and output by the fiber scanner 120 acts on a certain pixel point position on the medium surface, and forms a light spot on the pixel point position, so that the pixel point position is scanned. Driven by the optical fiber scanner 120, the output end of the transmission optical fiber 130 scans according to a certain scanning track, so that the light beam moves to the corresponding pixel position for scanning. During actual scanning, the light beam output by the transmission fiber 130 will form a light spot with corresponding image information (e.g., color, gray scale or brightness) at each pixel location. In a frame time, the light beam traverses each pixel position at a high enough speed to complete the scanning of a frame image, and because the human eye observes the object and has the characteristic of 'visual residual', the human eye cannot perceive the movement of the light beam at each pixel position but sees a complete frame image.

With continued reference to FIG. 1B, a conventional fiber scanner 120 is shown, which mainly comprises: a piezoelectric actuator 121, a fiber optic cantilever 122, a lens 123, a scanner package 124, and a mount 125. The piezoelectric actuator 121 is fixed in the scanner package 124 through a fixing element 125, the transmission fiber 130 extends at a free end of the piezoelectric actuator 121 to form a fiber suspension 122 (also called as a scanning fiber), when the optical fiber scanner is in operation, the piezoelectric actuator 121 vibrates in the Y-axis direction and the X-axis direction under the driving of a scanning driving signal, and is driven by the piezoelectric actuator 121, the free end of the fiber suspension 122 sweeps along a preset track and emits a light beam, and the emitted light beam can pass through the lens 123 to scan on the surface of a medium. Wherein, the Y-axis direction intersects with the X-axis direction, obviously, the Y-axis direction and the X-axis direction may be perpendicular.

As shown in fig. 2A to 4, the light source module includes a plurality of COS (Chip on Substrate) light sources 20; a plurality of collimating lenses 21 disposed on the emitting light paths of the plurality of COS light sources 20, the plurality of collimating lenses 21 corresponding to the plurality of COS light sources 20 one to one; the beam combining assembly 22 is arranged on an exit light path of the plurality of collimating lenses 21, the beam combining assembly 22 comprises a beam combining base body 221, the beam combining base body 221 comprises a first light passing surface 222 and a second light passing surface 223 which are opposite, and a plurality of filter plates 224 with different cut-off wavelengths which are in one-to-one correspondence with the plurality of COS light sources 20 are arranged on the first light passing surface 222; the second light-passing surface 223 includes an internal reflection region 2230 and a light-emitting region 2231; the light emitted from the plurality of COS light sources 20 enters the first light-passing surface 222, is combined by the plurality of filters 224 with different cut-off wavelengths and reflected by the internal reflection region 2230, and then is combined into a light beam and emitted from the light-emitting region 2231; and the coupling lens 23 is used for coupling the light emitted by the beam combining component 22 into an optical fiber 24.

As shown in fig. 3, for the schematic light path propagation diagram of the light source module according to the embodiment of the present invention, the beam combining component 22 is configured to combine the light beams by disposing a plurality of filters 224 with different cut-off wavelengths on the beam combining substrate 221, during the light combining process, the incident direction of the light beam and the emergent direction of the light beam are the same, the COS light source 20 and the receiving fiber 24 are disposed in the parallel direction, and the volume of the device can be made small, thereby providing a possibility for meeting the requirement for miniaturization of the light source of the head-mounted display device. The head-mounted display device may be an AR (Augmented Reality) device, a VR (Virtual Reality) device, or the like.

On the other hand, the light source adopts COS light source 20, compares other laser instrument encapsulation modes, and the light source that adopts the COS encapsulation can densely arrange, can reduce the volume of light source module, and then reduces the volume of wearing display device such as intelligent glasses, promotes the user and wears the travelling comfort.

As shown in fig. 4, which is a schematic diagram of a beam combining assembly according to an embodiment of the present invention, the beam combining assembly 22 includes a first light-passing surface 222 and a second light-passing surface 223, which are opposite to each other, and different processes are adopted for combining beams, the first light-passing surface 222 is not coated with a film, a plurality of filters 224 with different cut-off wavelengths are glued on the first light-passing surface 222, the second light-passing surface 223 is divided into 2 light-passing regions, which are an internal reflection region 2230 and a light-emitting region 2231, respectively, and an internal reflection film is coated on the internal reflection region 2230; the light exit region 2231 may be coated with an anti-reflective coating or uncoated.

In an embodiment of the present invention, the beam combining substrate 221 may be a glass substrate, and the beam combining substrate 221 may also be other light-transmitting materials, which is not limited in the present invention.

In the embodiment of the present invention, light emitted from the plurality of COS light sources 20 is collimated by the corresponding collimating lens 21, and then obliquely enters the corresponding filter 224.

As shown in fig. 5, after passing through the collimating mirror 21, the light emitted from the 3 COS light sources 20 spaced at the distance d enters the beam combining assembly 22 at the angle a, is reflected and combined into a beam through the filter 224 and the beam combining substrate 221 on the beam combining assembly 22, and then enters the coupling lens 23 to be coupled into the optical fiber 24.

In one possible embodiment, the angle a at which the light emitted from the COS chip is tilted into the beam combining substrate 221 is 6 to 15 degrees. In other words, an included angle a between the incident direction of the light emitted from the plurality of COS light sources 20 and the normal of the filter 224 is 6 to 15 degrees, and in this angle interval range, on one hand, the light emitted from the plurality of COS light sources 20 can be ensured to be combined, and on the other hand, the spacing distance between the filters 224 or the spacing distance between the COS light sources 20 can be reduced as much as possible, thereby reducing the volume of the whole light source module.

In the embodiment of the present invention, 3 COS light sources 20 correspond to 3 different wavelengths, for example, 3 COS light sources 20 are RGB light sources, and correspondingly, 3 filters 224 on the beam combining component 22 correspond to different cut-off wavelengths, so as to implement RGB beam combining.

In the embodiment of the present invention, as shown in fig. 2A and 2B, the light source module includes a base 25, a hollow cavity is formed inside the base 25, the base 25 includes a base body 251, and the COS light source 20, the collimating lens 21, and the beam combining assembly 22 are disposed in the cavity.

In the embodiment of the present invention, in order to supply power to the COS chip, electrodes need to be arranged on the base body 251. In one possible embodiment, the positive and negative electrodes are respectively arranged on the left and right sides of the base body 251 with respect to the base body 251, that is, the positive and negative electrodes are respectively arranged on the front and rear sides of the COS chip, the positive electrode is arranged on the rear side of the COS chip, and the negative electrode is arranged on the front side of the COS chip, that is, the side where the light exit ports 252 of the coupling lenses 23 are provided, to achieve a small and compact arrangement.

In the embodiment of the present invention, the COS light source 20 is still exemplified as the RGB light source. As shown in fig. 6 and 7, the susceptor 25 includes a susceptor 251, and a plurality of positive electrodes B +, G +, and R + disposed side by side on the right side of the susceptor 251 correspond to the plurality of positive electrodes B +, G +, and R + of the plurality of COS light sources 20, respectively. The negative electrode RGB-is on the left side of the base body 251, and the negative electrodes of the plurality of COS light sources 20 are connected in series through the conductive wire 204 and then connected to the negative electrode RGB-on the left side of the base body 251.

In the embodiment of the present invention, the positive electrode of each COS light source 20 and the corresponding positive electrode on the base body 251 may be connected by a wire 253; the negative electrodes of the plurality of COS light sources 20 are connected in series through the conductive line 204, and then connected to the negative electrode RGB-on the left side of the base body 251 through the conductive line 254, the transition conduction band 26, and the conductive line 255, wherein the transition conduction band 26 is disposed on the insulating block 27. In the embodiment of the present invention, the

conductive wires

204, 253, 254, and 255 may be gold wires, or may be other wires, which is not limited in the present invention.

In the embodiment of the present invention, in order to form a sealed cavity inside the base 25, the light source module includes a plurality of electrode insulators 256, and the electrode insulators 256 are disposed outside the positive and negative electrodes. The plurality of electrode insulators 256 serve to seal and insulate the positive electrodes B +, G +, and R + and the negative electrodes RGB-. In one possible embodiment, the electrode insulator 256 may be a round tube.

As shown in fig. 6, in order to form a sealed cavity inside the base 25, the coupling lens 23 is embedded in a left side wall provided in the base body 251 and is sinter-fixed using a glass solder 257.

In the embodiment of the utility model, the COS light source 20 and the base 25 are sintered by medium-temperature welding, and the adjustment between the COS light source 20 and the base 25 is not needed, so that the heat dissipation is good. Moreover, the COS light source 20 is sintered on the base 25, so that the stability is good, the structure is compact, and the COS light source is suitable for small-size packaging.

In the embodiment of the present invention, each COS light source 20 includes a light emitting chip, and a plurality of light emitting chips of a plurality of COS light sources 20 may be disposed on one chip heat sink, so that the plurality of COS light sources 20 are more integrated, which is beneficial to reducing the volume of the light source module and has good heat dissipation.

In another possible embodiment, as shown in fig. 7, each COS light source 20 includes a light emitting chip 201 and a chip heat sink 202, the light emitting chip 201 is disposed on the chip heat sink 202, the chip heat sink 202 is sintered on the submount 203 at a sintering temperature of 220 ℃ to 230 ℃, the submount 203 is sintered on the base body 251 at a sintering temperature of 175 ℃ to 190 ℃, this way facilitates the mounting of the COS chip, the positive electrode of the COS light source 20 can be disposed on the submount 203, and the area of the submount 203 is large, which can improve the heat dissipation performance.

As shown in fig. 8 and 9, in order to provide a structural schematic diagram of the pigtail assembly according to the embodiment of the present invention, the pigtail assembly 28 is connected to the base body 251 by welding. The pigtail assembly 28 comprises a pigtail 281, a sleeve 282 sleeved outside the pigtail 281, and a protection tube 283 arranged outside the sleeve 282; the pigtail 281 is provided with a through hole for the optical fiber 24 to pass through.

In the embodiment of the utility model, because the coupling lens 23 and the base body 251 are sintered together, the light beam coupling can be realized by adjusting the collimating lens 21 and the optical fiber pigtail assembly 28, thereby simplifying the optical fiber outgoing sealing requirement. During installation, the pigtail 281 can move back and forth along the sleeve 282, the sleeve 282 can move transversely along the light outlet 252 of the base body 251, so that coupling adjustment is facilitated, and after the position adjustment of the pigtail assembly 28 and the base 25 is completed, the pigtail assembly can be fixed by welding at

welding points

284, 285 and 286.

As shown in fig. 10, a schematic structural diagram of an optical fiber scanning imaging device according to an embodiment of the present invention includes a light source module 1001 and a light scanning module 1002, where light emitted from the light source module 1001 is scanned and output by the light scanning module 1002 and then is used as display image light; the optical scanning module 1002 includes an actuator, an output end of an optical fiber 1003 in the light source module 1001 is fixed to the actuator, the optical fiber 1003 exceeds the actuator and forms an optical fiber cantilever, the optical fiber cantilever is driven by the actuator to scan in a three-dimensional space, an imaging principle of the optical fiber cantilever is described in the embodiment corresponding to fig. 1A to 1B, and details of the optical fiber cantilever are not repeated herein.

The optical fiber scanning imaging device in the embodiment of the utility model can be applied to various projection display devices, such as: the present invention relates to a projection display apparatus, and more particularly, to a head-mounted AR apparatus, a head-mounted VR apparatus, a projection television, a projector, and the like, where the projection display apparatus may display through one optical fiber scanning imaging device or may display through splicing of a plurality of optical fiber scanning imaging devices, and the present invention is not limited thereto.

In the embodiment of the utility model, the intelligent glasses are a possible application mode of the optical fiber scanning imaging device, and the intelligent glasses require the display device to have a very small volume, so the optical fiber scanning imaging device in the scheme is particularly suitable for the intelligent glasses. As shown in fig. 11, a schematic diagram of a possible structure of smart glasses provided in an embodiment of the present invention includes: the optical fiber scanning imaging device comprises a lens, a frame for accommodating the lens, glasses legs arranged on two sides of the frame and an optical fiber scanning imaging device (the insides of the glasses legs or on the frame, not shown in the figure); the optical scanning module is arranged inside the glasses legs or on the glasses frame. The light source module can be built-in the inside of intelligent glasses, for example: the light source module sets up the mirror leg is kept away from the free end of picture frame, mirror leg end promptly. In other embodiments, the light source module may be provided separately from the temple; the emergent light of the light source module is transmitted to the light scanning module through an optical fiber.

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

The utility model is not limited to the foregoing embodiments. The utility model extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims

1. A light source module, comprising: a plurality of chip substrate bonding COS light sources;

2. The light source module as claimed in claim 1, wherein the plurality of filters with different cut-off wavelengths are glued on the first light-passing surface.

3. The light source module as claimed in claim 1, wherein the internal reflection region is coated with an internal reflection film; and the light emitting area is plated with an antireflection film.

4. The light source module as claimed in claim 1, wherein the beam combining substrate is a glass substrate.

5. The light source module as claimed in claim 1, wherein the light emitted from the plurality of COS light sources is collimated by the corresponding collimating lens and then obliquely incident on the corresponding filter; and the included angle between the incident direction of the light emitted by the COS light sources and the normal of the filter is 6-15 degrees.

6. The light source module as claimed in claim 1, wherein each of the COS light sources includes a light emitting chip, a plurality of light emitting chips of the plurality of COS light sources being disposed on one chip heat sink; or

7. The light source module of claim 1, wherein the light source module comprises a base having a hollow cavity therein, the plurality of COS light sources, the plurality of collimating lenses, and the beam combiner assembly being disposed within the cavity;

8. The light source module of claim 7, wherein the coupling lens is embedded in a left sidewall of the base body, and the coupling lens and the base body are fixed by glass solder sintering.

9. An optical fiber scanning imaging device, which is characterized by comprising the light source module and the light scanning module set as claimed in any one of claims 1 to 8, wherein light emitted by the light source module is scanned and output by the light scanning module set to be used as display image light; the optical scanning module comprises an actuator, an optical fiber output end in the light source module is fixed on the actuator, the optical fiber exceeds the actuator and forms an optical fiber cantilever, and the optical fiber cantilever is driven by the actuator to sweep in a three-dimensional space.

10. A smart eyewear, comprising: the optical fiber scanning imaging device comprises a lens, a frame for accommodating the lens, a pair of glasses legs arranged on two sides of the frame, and at least one optical fiber scanning imaging device according to claim 9; the optical scanning module is arranged inside the glasses legs or on the glasses frame; the light source module is arranged inside the free end of the glasses leg far away from the glasses frame, or the light source module is arranged separately from the glasses leg; the emergent light of the light source module is transmitted to the light scanning module through an optical fiber.