CN114624872A - Scanning galvanometer and glasses - Google Patents
Scanning galvanometer and glasses Download PDFInfo
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- CN114624872A CN114624872A CN202210248286.XA CN202210248286A CN114624872A CN 114624872 A CN114624872 A CN 114624872A CN 202210248286 A CN202210248286 A CN 202210248286A CN 114624872 A CN114624872 A CN 114624872A
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- reflector
- scanning galvanometer
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- MNKMDLVKGZBOEW-UHFFFAOYSA-M lithium;3,4,5-trihydroxybenzoate Chemical compound [Li+].OC1=CC(C([O-])=O)=CC(O)=C1O MNKMDLVKGZBOEW-UHFFFAOYSA-M 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The utility model relates to a wearable equipment technical field specifically is about a scanning galvanometer, the scanning galvanometer includes: the reflecting mirror comprises a first connecting frame, a second connecting frame, a reflecting mirror, a first driver and a second driver, wherein the second connecting frame is arranged on the first connecting frame and can rotate around a first shaft relative to the first connecting frame; the reflector is arranged on the second connecting frame and can rotate around a second shaft relative to the second connecting frame, and the first shaft is not parallel to the second shaft; the first driver is arranged on the reflector and used for driving the reflector to rotate around the first shaft relative to the second connecting frame; the second driver is arranged on the second connecting frame and used for driving the second connecting frame to rotate around the second shaft relative to the first connecting frame. The weight of the glasses can be reduced.
Description
Technical Field
The utility model relates to a wearable equipment technical field particularly, relates to a scanning galvanometer and glasses.
Background
With the development and progress of technologies, augmented reality devices are gradually beginning to be applied. In the augmented display device, augmented reality display is realized by superimposing a virtual image and a real scene. At present, the problem of overlarge weight exists in head-mounted augmented reality equipment such as glasses or helmets, and the overlarge weight is not beneficial to being worn for a long time.
Disclosure of Invention
The present disclosure is directed to a scanning galvanometer and glasses, so as to reduce the weight of the glasses to at least a certain extent.
According to a first aspect of the present disclosure, there is provided a scanning galvanometer, characterized in that the scanning galvanometer comprises:
a first connection frame;
the second connecting frame is arranged on the first connecting frame and can rotate around a first shaft relative to the first connecting frame;
the reflector is arranged on the second connecting frame and can rotate around a second shaft relative to the second connecting frame, and the first shaft is not parallel to the second shaft;
the first driver is arranged on the reflector and used for driving the reflector to rotate around the first shaft relative to the second connecting frame;
and the second driver is arranged on the second connecting frame and used for driving the second connecting frame to rotate around the second shaft relative to the first connecting frame.
According to a second aspect of the present disclosure, there is provided eyeglasses comprising:
the scanning galvanometer;
a light source opposite to the reflector for providing the light source to the reflector;
and the display lens is used for receiving the light rays reflected by the reflector and realizing enhanced display.
The scanning galvanometer provided by the embodiment of the disclosure comprises a first connecting frame, a second connecting frame, a reflector, a first driver and a second driver, wherein the first connecting frame is arranged on the second connecting frame, the second connecting frame is arranged on the reflector, the reflector is arranged on the first driver, the second connecting frame is arranged on the second driver, the reflector is driven by the second driver, the two-dimensional scanning of the scanning galvanometer is realized by driving the second connecting frame by the first driver, the galvanometer with two dimensions in glasses is avoided, and the weight of the glasses is reduced. And the first driver is arranged on the reflecting mirror, so that the volume of the scanning galvanometer can be reduced, and the weight of the glasses is further reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 is a schematic view of a first scanning galvanometer provided in accordance with an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic view of a second scanning galvanometer provided in an exemplary embodiment of the present disclosure;
FIG. 3 is a schematic view of a first eyewear provided in accordance with an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic view of a second type of eyewear provided in an exemplary embodiment of the present disclosure;
fig. 5 is a schematic block diagram of a control module according to an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a detailed description thereof will be omitted.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The exemplary embodiment of the present disclosure first provides a scanning galvanometer 10, as shown in fig. 1, the scanning galvanometer 10 includes: a first connection frame 110, a second connection frame 120, a mirror 130, a first driver 140, and a second driver 150; the second connection frame 120 is disposed on the first connection frame 110, and the second connection frame 120 is rotatable around the first shaft 21 relative to the first connection frame 110; the reflector 130 is arranged on the second connecting frame 120, and the reflector 130 can rotate around a second axis 22 relative to the second connecting frame 120, and the first axis 21 and the second axis 22 are not parallel; the first driver 140 is disposed on the reflector 130, and the first driver 140 is configured to drive the reflector 130 to rotate around the first axis 21 relative to the second connection frame 120; the second driver 150 is disposed on the second connecting frame 120, and the second driver 150 is used for driving the second connecting frame 120 to rotate around the second axis 22 relative to the first connecting frame 110.
The scanning galvanometer 10 provided by the embodiment of the disclosure comprises a first connecting frame 110, a second connecting frame 120, a reflecting mirror 130, a first driver 140 and a second driver 150, wherein the second connecting frame 120 is arranged on the first connecting frame 110, the reflecting mirror 130 is arranged on the second connecting frame 120, the first driver 140 is arranged on the reflecting mirror 130, the second driver 150 is arranged on the second connecting frame 120, the reflecting mirror 130 is driven by the first driver 140, and the second connecting frame 120 is driven by the second driver 150, so that the two-dimensional scanning of the scanning galvanometer 10 is realized, the galvanometer with two dimensions is prevented from being arranged in glasses, and the weight of the glasses is reduced. The first driver 140 is disposed on the reflector 130 to reduce the volume of the galvanometer 10, thereby further reducing the weight of the eyeglasses.
Further, the scanning galvanometer 10 provided by the embodiment of the present disclosure may further include a base (not shown in the figures), the first connecting frame 110 is connected to the base, and a power supply circuit is disposed in the base and is respectively connected to the first driver 140 and the second driver 150. In practical applications, the first connection frame 110, the second connection frame 120, the mirror 130, the first driver 140 and the second driver 150 may be packaged in the base.
Further, as shown in fig. 2, the scanning galvanometer 10 provided by the embodiment of the present disclosure may further include a first detecting unit 171 and a second detecting unit 172, where the first detecting unit 171 is connected to the first connecting frame 110 and the second connecting frame 120, respectively, and the first detecting unit 171 is configured to detect a rotation angle of the second connecting frame 120 relative to the first connecting frame 110; the second detecting unit 172 is respectively connected to the reflecting mirror 130 and the second connecting frame 120, and the second detecting unit 172 is configured to detect a rotation angle of the reflecting mirror 130 relative to the second connecting frame 120.
The first detection unit 171 detects and detects the rotation angle of the second connection frame 120 relative to the first connection frame 110, and the second detection unit 172 detects the rotation angle of the reflection mirror 130 relative to the second connection frame 120, so that the feedback control of scanning can be realized, and the scanning precision of the scanning galvanometer 10 is improved.
The following provides a detailed description of the portions of the scanning galvanometer 10 provided by the embodiments of the present disclosure:
the base may be a silicon base or a non-silicon base (e.g., a metal base or a non-metal base, etc.). The base is provided with a power supply circuit, the power supply circuit is respectively connected with the first driver 140 and the second driver 150, and the power supply circuit provides driving electric signals for the first driver 140 and the second driver 150. The power supply circuit can be embedded in the base, a power supply pin is arranged on the base and connected with the power supply circuit, and the power supply pin is used for inputting an external power supply signal into the base.
For example, a first power supply circuit and a second power supply circuit may be disposed in the base, and the first power supply circuit is connected to the first driver 140 for providing a driving signal to the first driver 140. The second power supply circuit is connected to the second driver 150, and the second power supply circuit is configured to provide a driving signal to the second driver 150.
The first connection frame 110 is disposed on the base, and the first connection frame 110 may be integrated with the base, or the first connection frame 110 may be connected to the base by glue or the like. The first connection frame 110 has a first receiving cavity, for example, the first connection frame 110 may be a ring-shaped structure, and an inner ring forms the first receiving cavity. When the first connection frame 110 and the base are of a unitary structure, a groove may be cut in the base to form the first connection frame 110 on one surface of the base. When the first connection frame 110 and the base are of a split structure, the first connection frame 110 having a ring shape may be mounted on one surface of the base.
The second link frame 120 is coupled to the first link frame 110, and the second link frame 120 is rotatable about the first shaft 21 with respect to the first link frame 110. The second connection frame 120 has a second receiving cavity, for example, the second connection frame 120 may also be an annular structure, an inner ring forms the second receiving cavity, and the size of the outer ring of the second connection frame 120 is smaller than the size of the inner ring of the first connection frame 110, that is, the second connection frame 120 is located in the inner ring of the first connection frame 110.
Here, the first connection frame 110 and the second connection frame 120 may be connected by a first connection arm 161, and the first connection arm 161 may be disposed along the direction of the first shaft 21. The first connection arm 161 may include a first arm and a second arm, which are respectively disposed at both sides of the second connection frame 120 and are coaxial. The first arm is connected to the first connection frame 110 and the second connection frame 120, respectively, and the second arm is connected to the first connection frame 110 and the second connection frame 120, respectively.
The first arm is rotatably connected to the first connection frame 110, the first arm is fixedly connected to the second connection frame 120, the second arm is rotatably connected to the first connection frame 110, and the second arm is fixedly connected to the second connection frame 120. When the second driver 150 drives the second link frame 120, the first arm, and the second arm rotate with respect to the first link frame 110.
It is understood that in the disclosed embodiment, the first arm and the second arm may also be made of a flexible material, for example, when the second driver 150 drives the second connection frame 120, the first arm and the second arm are twisted, and the second connection frame 120 rotates relative to the first connection frame 110.
The reflecting mirror 130 and the second connection frame 120 may be connected by a second connection arm 162, and the second connection arm 162 may be disposed in the direction of the second shaft 22. The second connection arm 162 may include a third arm and a fourth arm, which are respectively disposed at both sides of the mirror 130 and are coaxial. The third arm is connected to the reflecting mirror 130 and the second connection frame 120, respectively, and the fourth arm is connected to the reflecting mirror 130 and the second connection frame 120, respectively.
The third arm is connected with the second connecting frame 120 in a rotating manner, the third arm is fixedly connected with the reflector 130, the fourth arm is connected with the second connecting frame 120 in a rotating manner, and the fourth arm is fixedly connected with the reflector 130. When the first driver 140 drives the driving mirror 130, the first mirror 130 connection frame, the third arm, and the fourth arm rotate with respect to the second connection frame 120.
It is understood that in the disclosed embodiment, the third arm and the fourth arm may also be made of a flexible material, for example, when the first driver 140 drives the mirror 130, the third arm and the fourth arm are twisted, and the second mirror 130 connecting frame rotates relative to the second connecting frame 120.
The first driver 140 is disposed on the reflector 130, and the first driver 140 is used for driving the reflector 130 to rotate around the second axis 22 relative to the second connecting frame 120. The first actuator 140 can drive the mirror 130 to rotate clockwise about the second axis 22, or the first actuator 140 can drive the mirror 130 to rotate counterclockwise about the second axis 22.
The first driver 140 may include: a first piezoelectric sheet 141 and a second piezoelectric sheet 142, wherein the first piezoelectric sheet 141 is arranged on the reflecting surface of the reflector 130; the second piezoelectric sheet 142 is disposed on the back surface of the reflector 130, and the first piezoelectric sheet 141 and the second piezoelectric sheet 142 are respectively disposed on two sides of the second shaft 22.
For example, the reflector 130 may be a circular reflector 130, and the center of the circular reflector 130 is located on the second axis 22, i.e. the second axis 22 is a diameter of the circular reflector 130. The second shaft 22 divides the reflector 130 into two semicircular regions, the first piezoelectric plate 141 is disposed in one semicircular region, and the second piezoelectric plate 142 is disposed in the other semicircular region. The first piezoelectric sheet 141 and the second piezoelectric sheet 142 may be symmetrically disposed on both sides of the second axis 22. For example, the mirror 130 is divided into four regions, which may be an upper left region, a lower left region, an upper right region, and a lower right region, by the second shaft 22 and another diameter perpendicular to the second shaft 22. The first piezoelectric sheet 141 may be disposed in the upper left region, and the second piezoelectric sheet 142 may be disposed in the upper right region. Or the first piezoelectric plate 141 may be disposed in the left lower region and the second piezoelectric plate 142 may be disposed in the right lower region.
The second driver 150 is disposed on the second connection frame 120, and the second driver 150 is used for driving the second connection frame 120 to rotate around the first shaft 21 relative to the first connection frame 110. The second driver 150 can drive the second connection frame 120 to rotate clockwise around the first shaft 21, or the second driver 150 can drive the second connection frame 120 to rotate counterclockwise around the first shaft 21.
The second driver 150 includes: a third piezoelectric patch 151 and a fourth piezoelectric patch 152, wherein the third piezoelectric patch 151 is arranged on one surface of the second connection frame 120; the fourth piezoelectric sheet 152 is disposed on the other surface of the second connection frame 120, and the third piezoelectric sheet 151 and the fourth piezoelectric sheet 152 are respectively disposed on two sides of the first shaft 21.
For example, the second connection frame 120 may be a circular ring, and the first shaft 21 passes through the center of the second connection frame 120, that is, the first shaft 21 may be a diameter of the second connection frame 120. The first shaft 21 divides the mirror 130 into two semicircular regions, the third piezoelectric plate 151 is provided in one semicircular region, and the fourth piezoelectric plate 152 is provided in the other semicircular region. The third piezoelectric sheet 151 and the fourth piezoelectric sheet 152 may be symmetrically disposed on both sides of the first shaft 21. For example, the second connection frame 120 is divided into four regions, which may be an upper left region, a lower left region, an upper right region, and a lower right region, by the first shaft 21 and another diameter perpendicular to the first shaft 21. The third piezoelectric patch 151 may be disposed in an upper left region and the fourth piezoelectric patch 152 may be disposed in a lower left region. Or the third piezoelectric patch 151 may be provided in the upper right region and the fourth piezoelectric patch 152 may be provided in the lower right region.
The first piezoelectric sheet 141, the second piezoelectric sheet 142, the third piezoelectric sheet 151, and the fourth piezoelectric sheet 152 may be ceramic piezoelectric sheets in the disclosed embodiment. In practical applications, the materials of the first piezoelectric sheet 141, the second piezoelectric sheet 142, the third piezoelectric sheet 151, and the fourth piezoelectric sheet 152 may also be piezoelectric crystals, such as quartz crystals, lithium gallate, lithium germanate, titanium germanate, lithium niobate and lithium tantalate of iron transistors.
The first piezoelectric plate 141 is disposed on the reflective surface of the reflector 130, that is, the first piezoelectric plate 141 is disposed on the side of the reflector 130 away from the base. The first piezoelectric plate 141 is connected to a first power supply circuit, and the first piezoelectric plate 141 converts electrical energy into mechanical energy. In order to connect the first power supply circuit and the first piezoelectric sheet 141, a gap is provided between the reflecting mirror 130 and the second connection frame 120, and the first power supply circuit is extended from the gap between the reflecting mirror 130 and the second connection frame 120 to connect the first piezoelectric sheet 141. Or a hole may be formed in the reflector 130 at a position corresponding to the first piezoelectric sheet 141, and the hole may be filled with a conductive material, and the first power supply circuit connection may be in contact with the conductive material in the hole. The second piezoelectric sheet 142 is disposed on the back surface of the reflector 130, and the second piezoelectric sheet 142 is connected to the first power supply circuit. The second piezoelectric sheet 142 and the first piezoelectric sheet 141 cooperate to drive the mirror 130 to rotate.
The third piezoelectric sheet 151 is disposed on a side of the second connection frame 120 away from the base, the third piezoelectric sheet 151 is connected to the second power supply circuit, and the third piezoelectric sheet 151 converts electric energy into mechanical energy. In order to connect the second power supply circuit and the third piezoelectric sheet 151, a gap is provided between the first connection frame 110 and the second connection frame 120, and the second power supply circuit protrudes from the gap between the first connection frame 110 and the second connection frame 120 to connect the third piezoelectric sheet 151. Or a hole may be formed in the second connection frame 120 at a position corresponding to the third piezoelectric sheet 151, and the hole may be filled with a conductive material, and the second power supply circuit connection may be in contact with the conductive material in the hole. The fourth piezoelectric patch 152 is disposed on the back surface of the second connection frame 120, and the fourth piezoelectric patch 152 is connected to the second power supply circuit. The fourth piezoelectric sheet 152 and the third piezoelectric sheet 151 cooperate to drive the second connection frame 120 to rotate.
In the embodiment of the present disclosure, the first shaft 21 and the second shaft 22 are not solid shafts on the reflecting mirror 130 or the second connection frame 120, the first shaft 21 is a virtual shaft of the rotation center of the reflecting mirror 130, and the second shaft 22 is a virtual shaft of the rotation center of the second connection frame 120. The first axis 21 and the second axis 22 may be vertically arranged, for example, in a plane coordinate system, the center of the mirror 130 may be the origin, the first axis 21 is the Y axis, and the second axis 22 is the X axis.
The first detecting unit 171 is respectively connected to the first connection frame 110 and the second connection frame 120, and the first detecting unit 171 is configured to detect a rotation angle of the second connection frame 120 relative to the first connection frame 110; the second detecting unit 172 is respectively connected to the reflecting mirror 130 and the second connecting frame 120, and the second detecting unit 172 is configured to detect a rotation angle of the reflecting mirror 130 relative to the second connecting frame 120.
For example, the first detecting unit 171 may include a first hall sensor, and the second detecting unit 172 may include a second hall sensor, and the rotation angles of the reflecting mirror 130 and the second connection frame 120 are detected by the first hall sensor and the second hall sensor. Alternatively, a wheatstone bridge piezoresistive circuit may be formed on the first arm, the second arm, the third arm, and the fourth arm by ion implantation, and the rotation angle of the mirror 130 and the second connection frame 120 may be determined by detecting the torsion angle of each arm through the wheatstone bridge piezoresistive circuit.
The scanning galvanometer 10 provided by the embodiment of the disclosure comprises a first connecting frame 110, a second connecting frame 120, a reflector 130, a first driver 140 and a second driver 150, wherein the second connecting frame 120 is arranged on the first connecting frame 110, the reflector 130 is arranged on the second connecting frame 120, the first driver 140 is arranged on the reflector 130, the second driver 150 is arranged on the second connecting frame 120, the reflector 130 is driven by the first driver 140, the second connecting frame 120 is driven by the second driver 150, the two-dimensional scanning of the scanning galvanometer 10 is realized, the galvanometer with two dimensions arranged in glasses is avoided, and the weight of the glasses is reduced. The first driver 140 is disposed on the reflector 130 to reduce the volume of the galvanometer 10, thereby further reducing the weight of the eyeglasses.
Exemplary embodiments of the present disclosure also provide glasses, including: the scanning galvanometer 10, the light source 20 and the display mirror 30, wherein the light source 20 is opposite to the reflector 130 and is used for providing the light source 20 for the reflector 130; the display mirror 30 is used for receiving the light reflected by the reflector 130 and realizing enhanced display.
Wherein, scanning galvanometer 10 includes: a first connection frame 110, a second connection frame 120, a mirror 130, a first driver 140, and a second driver 150; the second connection frame 120 is disposed on the first connection frame 110, and the second connection frame 120 is rotatable around the first shaft 21 with respect to the first connection frame 110; the reflector 130 is arranged on the second connecting frame 120, and the reflector 130 can rotate around a second shaft 22 relative to the second connecting frame 120, and the first shaft 21 and the second shaft 22 are not parallel; the first driver 140 is disposed on the reflector 130, and the first driver 140 is configured to drive the reflector 130 to rotate around the first axis 21 relative to the second connection frame 120; the second driver 150 is disposed on the second connection frame 120, and the second driver 150 is used for driving the second connection frame 120 to rotate around the second axis 22 relative to the first connection frame 110.
It should be noted that the scanning galvanometer 10 in the eyeglasses provided in the embodiment of the present disclosure has been described in detail in the above embodiments, and is not repeated herein.
The glasses provided by the embodiment of the present disclosure include a scanning galvanometer 10, the mirror 130 is driven by a first driver 140 in the scanning galvanometer 10, and a second connecting frame 120 is driven by a second driver 150, so that the two-dimensional scanning of the scanning galvanometer 10 is realized, the galvanometers with two dimensions are prevented from being arranged in the glasses, and the weight of the glasses is reduced. The first driver 140 is disposed on the reflector 130 to reduce the volume of the galvanometer 10, thereby further reducing the weight of the eyeglasses.
The following will describe in detail the eyeglasses provided by the embodiments of the present disclosure:
the glasses provided by the embodiment of the disclosure can be virtual reality glasses, augmented reality glasses, mixed reality glasses or the like. And the glasses provided by the embodiment of the disclosure can also be a helmet or other head-mounted equipment similar to the glasses.
The eyeglasses may include a frame (not shown), lenses, and temples 40, the temples 40 being attached to the frame and the temples being rotatable relative to the frame. The lens is connected with the spectacle frame and has the functions of light transmission and display. The display lens 30 may be a lens, or the display lens 30 is a partial area on the lens, which is not particularly limited in the embodiment of the disclosure.
For example, in the embodiments of the present disclosure, the glasses may include a first glasses leg and a second glasses leg, the first glasses leg is disposed on one side of the frame and is hinged to the frame, the second glasses leg is disposed on the other side of the frame and is hinged to the frame.
In the embodiment of the present disclosure, the scanning galvanometer 10 and the light source 20 may be disposed on the temple 40, for example, the scanning galvanometer 10 and the light source 20 may be disposed on a first temple, or the scanning galvanometer 10 and the light source 20 may be disposed on a second temple.
The temple 40 may be a hollow structure, that is, the temple 40 is provided with an accommodating cavity, and the light source 20 and the vibrating mirror may be disposed in the accommodating cavity. The light source 20 has a light emitting portion opposite to the scanning galvanometer 10 to transmit light emitted from the light source 20 to the scanning galvanometer 10.
The scanning galvanometer 10 is disposed on the temple 40, and the mirror 130 deflects in response to a driving signal after the scanning galvanometer 10 is powered up, and reflects light to the display mirror 30. And transmits light to different areas of the display mirror 30 by the scanning motion of the mirror 130 to achieve a display of multiple pixels.
In the embodiment of the present disclosure, the display lens 30 may be an optical waveguide lens, the optical waveguide lens has a coupling-in portion 31 and a coupling-out portion 32, the coupling-in portion 31 is used for receiving the light reflected by the scanning galvanometer 10, the coupling-out portion 32 is used for coupling out the light, and the coupling-out portion 32 is located at a position corresponding to the lens and the glasses of the user.
For example, as shown in fig. 3, the light source 20 may be a laser emitter, the laser generator is disposed on the temple 40, and the light emitted by the laser emitter is along the length of the temple 40. That is, when the glasses are worn, the light emitted from the laser emitter is perpendicular to the lenses. The scanning galvanometer 10 and the laser emitter are arranged at 45 degrees, that is, the reflecting mirror 130 is at 45 degrees with the optical axis of the laser emitter in an initial state, and the initial state of the reflecting mirror 130 refers to the position of the reflecting mirror 130 when the first driver 140 and the second driver 150 are not powered on. The light emitted from the laser emitter changes its propagation direction through the scanning galvanometer 10, and the reflected light can directly enter the coupling-in portion 31 of the display mirror 30. The coupling-in portion 31 of the display mirror 30 may be located at a side of the display mirror 30.
Alternatively, as shown in fig. 4, the coupling portion 31 of the display lens 30 may be provided on the inner side of the display lens 30, and the inner side of the display lens 30 is the side of the user facing the user when the glasses are worn. On this basis, the eyeglasses provided by the embodiment of the present disclosure may further include an adjusting lens 50, the adjusting lens 50 has a reflective surface, the reflective surface of the adjusting lens 50 faces the reflector 130, and the adjusting lens 50 and the reflector 130 are parallel. The light emitted by the laser emitter is transmitted to the coupling-in portion 31 of the display mirror 30 by two reflections of the scanning galvanometer 10 and the adjustment mirror 50.
The display lens 30 may include a mirror body, a coupling-in portion 31, a coupling-out portion 32, and a transmission optical waveguide 33, wherein two ends of the transmission optical waveguide 33 are respectively connected to the coupling-in portion 31 and the coupling-out portion 32, and the transmission optical waveguide 33, the coupling-in portion 31, and the coupling-out portion 32 may be embedded in the mirror body or disposed on a surface of the mirror body. The incoupling portion 31 may be an incoupling grating and the outcoupling portion 32 may be an outcoupling grating. Of course, in the embodiment of the present disclosure, the display lens 30 may also be a reflective DOE (diffractive Optical Element) lens, and the like, which is not specifically limited in the embodiment of the present disclosure.
The light beam can be expanded before entering the display lens 30, for example, a beam expanding element is disposed between the scanning galvanometer 10 and the coupling portion 31, and the beam expanding element is configured to receive the light beam reflected by the reflector 130 and transmit the reflected light beam to the display lens 30 after expanding the beam.
The beam expander may be a concave mirror, and the concave mirror may be provided in the coupling-in portion 31. For example, when light enters the display lens 30 from the side of the display lens 30, a concave mirror may be provided at the side of the display lens 30. When light enters the display lens 30 from the inner side of the display lens 30, a concave mirror may be provided on the inner side of the display lens 30.
The light source 20 may be a monochromatic light source, such as a green light source, a red light source, or a blue light source, and the glasses may display monochromatic pictures. Alternatively, the light source 20 may be a multi-color light source 20, i.e., the light source 20 may include a multi-color laser emitter, for example, the light source 20 may include green, red and blue laser emitters. The three-color light is irradiated to the corresponding region of the reflector 130.
In the embodiment of the present disclosure, the first piezoelectric sheet 141 is disposed on the emitting surface of the reflector 130, and the first piezoelectric sheet 141 may affect the reflectivity of the reflector 130, for example, reduce the reflectivity of the area on the reflector 130 where the first piezoelectric sheet 141 is disposed. At this time, the light source 20 may include a first light source emitting light to the normal reflection area of the mirror 130 and a second light source emitting light to the area of the mirror 130 where the first piezoelectric sheet 141 is disposed. In order to avoid the first piezoelectric sheet 141 affecting the light emitted by the second light source, and thus affecting the display effect, the light emitted by the second light source may be compensated, for example, the intensity of the light emitted by the second light source is increased.
For example, the compensation value of the second light source may be determined in a calibration manner, the first light beam and the second light beam reflected by the reflector 130 are measured separately, and the driving signal of the second light source is adjusted until the intensities of the first light beam and the second light beam reflected by the reflector 130 are consistent. At this time, the driving signal of the first light source, the driving signal of the second light source and the brightness of the first light beam are recorded to form a mapping. Then, the brightness of the first light beam is adjusted, and the driving signal of the second light source is adjusted. Thus, the mapping relation between the first light beam and the driving signal of the first light source and the driving signal of the second light source at different brightness is obtained, and the corresponding driving signal of the second light source can be determined through the mapping relation when the LED driving lamp is used. The first light beam is light emitted by the first light source, and the second light beam is light emitted by the second light source.
Of course, in practical applications, the light may also be reflected only by the normal reflection area of the reflector 130, and the first piezoelectric sheet 141 does not reflect the light to solve the problem of light difference, which is not limited in the embodiments of the present disclosure.
As shown in fig. 5, the glasses provided in the embodiment of the present disclosure may further include a control module 60, the control module 60 is respectively connected to the scanning galvanometer 10 and the light source 20, and the control module 60 determines a driving signal of the light source 20 according to a gray scale of a target pixel and determines a driving signal of the scanning galvanometer 10 according to a position of the target pixel. The control module 60 may be disposed on the frame, and certainly, in practical applications, the control module 60 may also be disposed on the side arms 40, and the like, which is not specifically limited in the embodiment of the present disclosure.
The control module 60 may include a power management module 61, a main control chip 62, a communication module 63, a scan control module 64, and a light emitting control module 65. The power management module 61 is connected with the battery and the electric devices, and the power management module 61 is used for converting electric energy provided by the battery into electric signals required by the electric devices and transmitting the electric signals to the electric devices. The main control chip 62 is connected with the power management module 61, the communication module 63, the scanning control module 64 and the light-emitting control module 65, and the main control chip 62 is used for displaying and processing information. The communication module 63 is used for communicating with other electronic devices, the scanning control module 64 is used for outputting a driving signal for the position of a target pixel, and the scanning control module 64 is connected with the scanning galvanometer 10 and provides the driving signal for the scanning galvanometer 10. The light control module 65 is used for determining the light intensity of the laser emitter according to the gray scale of the target pixel.
The communication module 63 may be a bluetooth communication module, and the glasses implement communication with electronic devices such as a mobile phone through the bluetooth communication module. Some operations in the glasses can be operated by the computing power of the electronic equipment.
For example, when the glasses perform augmented reality display, calculating the driving electrical signal of the scanning galvanometer 10 and the driving signal of the light source 20 may be performed in a mobile phone, and after calculating and obtaining the driving current and the driving voltage of the scanning galvanometer 10 and the driving current and the driving voltage of the light source 20 in the mobile phone, the driving current and the driving voltage of the scanning galvanometer 10 and the driving current and the driving voltage of the light source 20 are sent to the glasses end through the bluetooth communication module 63. The main control module controls the scanning driving module to provide corresponding voltage and current to the scanning galvanometer 10 and controls the light source 20 driving module to provide corresponding voltage and current to the light source 20 according to the driving current and driving voltage of the scanning galvanometer 10 and the driving current and driving voltage of the light source 20 sent by the mobile phone.
Of course, in the disclosed example, the calculation of the driving current and the driving voltage of the scanning galvanometer 10, and the calculation of the driving current and the driving voltage of the light source 20 may also be performed in the main control chip 62, and the embodiment of the present disclosure is not limited thereto.
The scan driving module may provide corresponding driving signals to the first driver 140 and the second driver 150 in the embodiment of the present disclosure. For example, the scan driving module may provide a first direction driving signal to the first driver 140 and a second direction driving signal to the second driver 150. For example, the first directional driving signal may be a driving signal in which a 60 hz square wave and a high-frequency sine wave are superimposed, and the second directional driving signal may be a driving signal in which a 60 hz square wave and a high-frequency sine wave are superimposed.
In the embodiment of the present disclosure, two factors of display, pixel and pixel display, are formed by scanning of the scanning galvanometer 10 and display time modulation of the light source 20 (laser), respectively. The scanning of the scanning galvanometer 10 forms the whole display plane, so that the spatial position corresponds to the rotation angle of the scanning galvanometer 10 point by point, multiple tests and careful calibration can be carried out, and the specific angle corresponding to a certain rotation corresponds to a certain position of the display plane one by one. The intensity of the displayed content is realized by the modulation of a laser emitter, and the intensity and the brightness of light emitted by the laser are corresponding to the display and the gray scale of a certain pixel of a spatial position point.
Since in the application processor, the digital image displays information only in pixel position coordinates and corresponding gray scale values. Therefore, in the present embodiment, the scanning galvanometer 10 needs to convert the corresponding position coordinates and the gray-scale value into a voltage pair value of the piezoelectric driving the scanning galvanometer 10 and a current value of the brightness modulation of the laser. In the hardware circuit, after the application processor processes the display information, the processed display information is converted into a driving voltage change of the scanning galvanometer 10 and a pumping voltage change of the laser, so that the display function is realized.
In the embodiment of the present disclosure, a minimum monochromatic green laser light source may be adopted, and the laser light source is incident to the scanning galvanometer 10 after being shaped, and the galvanometer driver, the light source 20 driver and the main controller may be dispersedly arranged on the frame of the glasses through connecting wires, so as to keep only the laser emitter and the scanning galvanometer 10 at the glasses legs. The light reflected by the vibrating mirror passes through a convex mirror, is coupled into the waveguide sheet through the coupling inlet after being expanded, and accordingly information is displayed on the monochromatic waveguide sheet.
Based on the glasses that this disclosed embodiment provided, the size of its structure light path and hardware can reach present simplest hardware space and weight, can guarantee that AR glasses have the experience of wearing like conventional glasses to market acceptance of AR glasses is accelerated.
The eyeglasses provided by the embodiment of the present disclosure may include one or more scanning galvanometers 10, and when the eyeglasses include one scanning galvanometer 10, one scanning galvanometer 10 traverses all pixels on the display lens 30 to realize display in the scanning process. When the eyeglasses comprise a plurality of scanning galvanometers 10, the plurality of scanning galvanometers 10 can be distributed in an array manner, at this time, the display area on the display lens 30 can be divided into a plurality of areas in the scanning process, the number of pixels in each area is the same as that of the scanning galvanometers 10, and the display area can be scanned area by area during scanning.
The glasses provided by the embodiment of the present disclosure include a scanning galvanometer 10, the scanning galvanometer 10 includes a first driver 140 for driving a reflecting mirror 130, and a second driver 150 for driving a second connecting frame 120, so as to implement two-dimensional scanning of the scanning galvanometer 10, avoid two-dimensional galvanometers being arranged in the glasses, and reduce the weight of the glasses. The first driver 140 is disposed on the reflector 130, so that the volume of the scanning galvanometer 10 can be reduced, the weight of the glasses can be further reduced, and the augmented reality glasses can be made thinner.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A scanning galvanometer, the scanning galvanometer comprising:
a first connection frame;
the second connecting frame is arranged on the first connecting frame and can rotate around a first shaft relative to the first connecting frame;
the reflector is arranged on the second connecting frame and can rotate around a second shaft relative to the second connecting frame, and the first shaft is not parallel to the second shaft;
the first driver is arranged on the reflector and used for driving the reflector to rotate around the first shaft relative to the second connecting frame;
and the second driver is arranged on the second connecting frame and used for driving the second connecting frame to rotate around the second shaft relative to the first connecting frame.
2. The scanning galvanometer of claim 1, wherein the first connecting frame has a first receiving cavity, the second connecting frame is connected to the first receiving cavity, the second connecting frame has a second receiving cavity, and the mirror is disposed in the second receiving cavity.
3. The scanning galvanometer of claim 1, wherein the first driver comprises:
the first piezoelectric piece is arranged on the reflecting surface of the reflector;
and the second piezoelectric sheet is arranged on the back surface of the reflector, and the first piezoelectric sheet and the second piezoelectric sheet are respectively positioned on two sides of the second shaft.
4. The scanning galvanometer of claim 3, wherein the second driver comprises:
the third piezoelectric sheet is arranged on one surface of the second connecting frame;
and the fourth piezoelectric sheet is arranged on the other surface of the second connecting frame, and the third piezoelectric sheet and the fourth piezoelectric sheet are respectively positioned on two sides of the first shaft.
5. The scanning galvanometer of claim 1, further comprising:
the base, first connection frame connect in the base, be provided with supply circuit in the base, supply circuit connects respectively first driver with the second driver.
6. The scanning galvanometer of claim 1, further comprising:
the first detection unit is respectively connected with the first connecting frame and the second connecting frame and is used for detecting the rotation angle of the second connecting frame relative to the first connecting frame;
and the second detection unit is respectively connected with the reflector and the second connecting frame and is used for detecting the rotation angle of the reflector relative to the second connecting frame.
7. An eyeglass, comprising:
the scanning galvanometer of any one of claims 1-6;
a light source opposite to the reflector for providing the light source to the reflector;
and the display lens is used for receiving the light rays reflected by the reflector and realizing enhanced display.
8. The eyewear of claim 7, further comprising:
the control module is respectively connected with the scanning galvanometer and the light source, determines a driving signal of the light source according to the gray scale of a target pixel, and determines the driving signal of the scanning galvanometer according to the position of the target pixel.
9. The eyewear of claim 8, wherein the display lens comprises:
the optical waveguide is provided with a coupling-in part which is used for receiving the light transmitted by the scanning galvanometer.
10. The eyewear of claim 7, further comprising:
the glasses legs are connected with the display lenses, and the light source and the scanning galvanometer are arranged on the glasses legs.
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| CN202210248286.XA CN114624872A (en) | 2022-03-14 | 2022-03-14 | Scanning galvanometer and glasses |
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| CN202210248286.XA CN114624872A (en) | 2022-03-14 | 2022-03-14 | Scanning galvanometer and glasses |
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