CN114624872A - Scanning mirrors and glasses - Google Patents

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

Scanning mirrors and glasses

technical field

The present disclosure relates to the technical field of wearable devices, and in particular, to a scanning galvanometer and glasses.

Background technique

With the development and progress of technology, augmented reality devices have gradually begun to be applied. In the augmented display device, the augmented reality display is realized by superimposing the virtual image and the real scene. At present, there is a problem of excessive weight in head-mounted augmented reality devices such as glasses or helmets, which is not conducive to wearing for a long time.

SUMMARY OF THE INVENTION

The purpose of the present disclosure is to provide a scanning galvanometer and glasses, thereby reducing the weight of the glasses at least to a certain extent.

According to a first aspect of the present disclosure, there is provided a scanning galvanometer, wherein the scanning galvanometer comprises:

the first connection frame;

a second connecting frame, the second connecting frame is arranged on the first connecting frame, and the second connecting frame is rotatable around a first axis relative to the first connecting frame;

a reflector, the reflector is arranged on the second connection frame, and the reflector can rotate around a second axis relative to the second connection frame, and the first axis and the second axis are not parallel;

a first driver, the first driver is arranged on the mirror, and the first driver is used to drive the mirror to rotate around the first axis relative to the second connection frame;

A second driver, the second driver is arranged on the second connection frame, and the second driver is used to drive the second connection frame to rotate around the second axis relative to the first connection frame.

According to a second aspect of the present disclosure, there is provided eyeglasses comprising:

The above-mentioned scanning galvanometer;

a light source, the light source is opposite to the reflector, and is used for providing a light source to the reflector;

The display lens is used for receiving the light reflected by the reflecting mirror and realizing enhanced display.

The scanning galvanometer provided by the embodiment of the present disclosure includes a first connection frame, a second connection frame, a mirror, a first driver and a second driver, the second connection frame is arranged on the first connection frame, and the mirror is arranged on the second connection frame frame, the first driver is set on the mirror, the second driver is set on the second connection frame, the mirror is driven by the first driver, and the second connection frame is driven by the second driver, so as to realize the two-dimensional scanning of the scanning galvanometer, avoiding the need for Two-dimensional galvanometers are set in the glasses to reduce the weight of the glasses. In addition, the first driver is arranged on the reflector, which can reduce the volume of the scanning galvanometer and further reduce the weight of the glasses.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of a first scanning galvanometer provided by an exemplary embodiment of the present disclosure;

2 is a schematic diagram of a second scanning galvanometer provided by an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a first glasses provided by an exemplary embodiment of the present disclosure;

4 is a schematic diagram of a second type of glasses provided by an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic block diagram of a control module provided by an exemplary embodiment of the present disclosure.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various 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 their detailed descriptions will be omitted.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, such as according to the direction of the example described. It will be appreciated that if the device of the icon is turned upside down, the components described as "on" will become the components on "bottom". When a certain structure is "on" other structures, it may mean that a certain structure is integrally formed on other structures, or that a certain structure is "directly" arranged on other structures, or that a certain structure is "indirectly" arranged on another structure through another structure. other structures.

An 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 The driver 150; the second connection frame 120 is arranged on the first connection frame 110, and the second connection frame 120 can rotate around the first axis 21 relative to the first connection frame 110; the reflector 130 is arranged on the second connection frame 120, and reflects The mirror 130 can rotate around the second axis 22 relative to the second connection frame 120, and the first axis 21 and the second axis 22 are not parallel; The second connecting frame 120 rotates around the first axis 21 ; the second driver 150 is arranged on the second connecting frame 120 , and the second driver 150 is used to drive the second connecting frame 120 to rotate relative to the first connecting frame 110 around the second axis 22 .

The scanning galvanometer 10 provided by the embodiment of the present disclosure includes a first connection frame 110 , a second connection frame 120 , a mirror 130 , a first driver 140 and a second driver 150 , and the second connection frame 120 is disposed on the first connection frame 110 , the mirror 130 is set on the second connection frame 120 , the first driver 140 is set on the mirror 130 , the second driver 150 is set on the second connection frame 120 , the mirror 130 is driven by the first driver 140 , and the mirror 130 is driven by the second driver 150 The second connection frame 120 realizes the two-dimensional scanning of the scanning galvanometer 10, avoids setting two-dimensional galvanometers in the glasses, and reduces the weight of the glasses. In addition, the first driver 140 is disposed on the reflector 130 to reduce the volume of the scanning galvanometer 10 and further reduce the weight of the glasses.

Further, the scanning galvanometer 10 provided in the embodiment of the present disclosure may further include a base (not shown in the figure), the first connection frame 110 is connected to the base, and a power supply circuit is arranged in the base, and the power supply circuits are respectively connected to the first connection frame 110 . driver 140 and 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 can 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 detection unit 171 and a second detection unit 172 , and the first detection unit 171 is respectively connected to the first connection frame 110 and the second connection Frame 120, the first detection unit 171 is used to detect the rotation angle of the second connection frame 120 relative to the first connection frame 110; the second detection unit 172 is respectively connected to the mirror 130 and the second connection frame 120, and the second detection unit 172 uses For detecting the rotation angle of the mirror 130 relative to the second connection frame 120 .

The rotation angle of the second connection frame 120 relative to the first connection frame 110 is detected by the first detection unit 171 , and the rotation angle of the mirror 130 relative to the second connection frame 120 is detected by the second detection unit 172 , so that feedback of scanning can be realized. control to improve the scanning accuracy of the scanning galvanometer 10 .

Each part of the scanning galvanometer 10 provided by the embodiment of the present disclosure will be described in detail below:

The submount may be a silicon submount or a non-silicon submount (eg, a metal submount or a non-metal submount, etc.). The base is provided with a power supply circuit, the power supply circuit is respectively connected to the first driver 140 and the second driver 150 , and the power supply circuit provides driving electrical signals to the first driver 140 and the second driver 150 . The power supply circuit can be embedded in the base, and a power supply pin is arranged on the base, the power supply pin is connected with the power supply circuit, and the power supply pin is used for inputting an external power supply signal into the base.

Exemplarily, a first power supply circuit and a second power supply circuit may be provided 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 used for providing 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 integrally formed with the base, or the first connection frame 110 may be connected to the base by means of glue connection or the like. The first connecting frame 110 has a first accommodating cavity. For example, the first connecting frame 110 may be an annular structure, and the inner ring forms the first accommodating cavity. When the first connection frame 110 and the base are integrally constructed, a groove may be formed on the base to form the first connection frame 110 on a surface of the base. When the first connecting frame 110 and the base are of separate structures, the annular first connecting frame 110 can be installed on a surface of the base.

The second connection frame 120 is connected with the first connection frame 110 , and the second connection frame 120 can rotate around the first axis 21 relative to the first connection frame 110 . The second connecting frame 120 has a second accommodating cavity. For example, the second connecting frame 120 may also be an annular structure, the inner ring forms the second accommodating cavity, and the size of the outer ring of the second connecting frame 120 is smaller than that of the first connecting frame The size of the inner ring of 110 , that is, the second connection frame 120 is located in the inner ring of the first connection frame 110 .

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 axis 21 . The first connection arm 161 may include a first arm and a second arm, the first arm and the second arm are respectively disposed on two sides of the second connection frame 120 , and the first arm and the second arm are coaxial. The first arms are respectively connected to the first connection frame 110 and the second connection frame 120 , and the second arms are respectively connected to the first connection frame 110 and the second connection frame 120 .

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 connection frame 120 , the second connection frame 120 , the first arm and the second arm rotate relative to the first connection frame 110 .

It can be understood that, in the embodiment of the present disclosure, the first arm and the second arm may also be made of flexible materials. For example, when the second driver 150 drives the second connection frame 120, the first arm and the second arm are By twisting, the second connection frame 120 rotates relative to the first connection frame 110 .

The 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 along the direction of the second axis 22 . The second connecting arm 162 may include a third arm and a fourth arm, the third arm and the fourth arm are respectively disposed on two sides of the reflector 130 , and the third arm and the fourth arm are coaxial. The third arm is connected to the reflector 130 and the second connection frame 120 respectively, and the fourth arm is connected to the reflector 130 and the second connection frame 120 respectively.

The third arm is rotatably connected to the second connecting frame 120 , the third arm is fixedly connected to the reflector 130 , the fourth arm is rotatably connected to the second connecting frame 120 , and the fourth arm is fixedly connected to the reflector 130 . When the first driver 140 drives the mirror 130 , the connecting frame, the third arm and the fourth arm of the first mirror 130 rotate relative to the second connecting frame 120 .

It can be understood that, in the embodiment of the present disclosure, the third arm and the fourth arm may also be made of flexible materials. For example, when the first driver 140 drives the mirror 130, the third arm and the fourth arm are twisted , the connecting frame of the first reflecting mirror 130 rotates relative to the second connecting frame 120 .

The first driver 140 is disposed on the mirror 130 , and the first driver 140 is used for driving the mirror 130 to rotate relative to the second connection frame 120 around the second axis 22 . The first driver 140 can drive the mirror 130 to rotate clockwise about the second axis 22 , or the first driver 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, the first piezoelectric sheet 141 is arranged on the reflective surface of the mirror 130; the second piezoelectric sheet 142 is arranged on the back of the mirror 130, And the first piezoelectric sheet 141 and the second piezoelectric sheet 142 are respectively located on both sides of the second shaft 22 .

For example, the reflector 130 may be a circular reflector 130 , and the center of the reflector 130 is located on the second axis 22 , that is, the second axis 22 is a diameter of the reflector 130 . The second axis 22 divides the mirror 130 into two semicircular regions, the first piezoelectric sheet 141 is disposed in one semicircular region, and the second piezoelectric sheet 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 by the second axis 22 and another diameter perpendicular to the second axis 22, and the four regions may be an upper left region, a lower left region, an upper right region and a lower right region. The first piezoelectric sheet 141 may be disposed in the upper left area, and the second piezoelectric sheet 142 may be disposed in the upper right area. Alternatively, the first piezoelectric sheet 141 may be disposed in the lower left area, and the second piezoelectric sheet 142 may be disposed in the lower right area.

The second driver 150 is disposed on the second connection frame 120 , and the second driver 150 is used to drive the second connection frame 120 to rotate relative to the first connection frame 110 around the first axis 21 . 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 sheet 151 and a fourth piezoelectric sheet 152 , the third piezoelectric sheet 151 is arranged on one side of the second connection frame 120 ; the fourth piezoelectric sheet 152 is arranged on the side of the second connection frame 120 On the other side, the third piezoelectric sheet 151 and the fourth piezoelectric sheet 152 are respectively located on both 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 axis 21 divides the mirror 130 into two semi-circular regions, the third piezoelectric sheet 151 is disposed in one semi-circular region, and the fourth piezoelectric sheet 152 is disposed in the other semi-circular region. The third piezoelectric sheet 151 and the fourth piezoelectric sheet 152 may be symmetrically disposed on both sides of the first axis 21 . For example, the second connection frame 120 is divided into four regions by the first axis 21 and another diameter perpendicular to the first axis 21, and the four regions may be an upper left region, a lower left region, an upper right region and a lower right region. The third piezoelectric sheet 151 may be disposed in the upper left area, and the fourth piezoelectric sheet 152 may be disposed in the lower left area. Alternatively, the third piezoelectric sheet 151 may be disposed in the upper right area, and the fourth piezoelectric sheet 152 may be disposed in the lower right area.

In the embodiment of the present disclosure, 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. Of course, 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 can also be piezoelectric crystals, such as quartz crystal, lithium gallate , lithium germanate, titanium germanate, iron transistor lithium niobate and lithium tantalate, etc.

The first piezoelectric sheet 141 is disposed on the reflection surface of the reflector 130 , that is, the first piezoelectric sheet 141 is located on the side of the reflector 130 away from the base. The first piezoelectric sheet 141 is connected to the first power supply circuit, and the first piezoelectric sheet 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 reflector 130 and the second connection frame 120, and the first power supply circuit protrudes from the gap between the reflector 130 and the second connection frame 120, The first piezoelectric sheet 141 is connected. Alternatively, a hole may be opened on the reflector 130 at a position corresponding to the first piezoelectric sheet 141 , the hole is filled with conductive material, and the first power supply circuit is connected to the conductive material in the hole. The second piezoelectric sheet 142 is disposed on the back of the mirror 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 the 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 electrical 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 is connected from the space between the first connection frame 110 and the second connection frame 120. The gap is extended, and the third piezoelectric sheet 151 is connected. Alternatively, a hole may be opened on the second connection frame 120 at a position corresponding to the third piezoelectric sheet 151 , the hole is filled with conductive material, and the second power supply circuit is connected to the conductive material in the hole. The fourth piezoelectric sheet 152 is disposed on the back of the second connection frame 120, and the fourth piezoelectric sheet 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.

It should be noted that, in the embodiment of the present disclosure, the first axis 21 and the second axis 22 are not physical axes on the reflector 130 or the second connection frame 120 , and the first axis 21 refers to the virtual axis of the rotation center of the reflector 130 . The second axis 22 refers to the virtual axis of the rotation center of the second connection frame 120 . The first axis 21 and the second axis 22 can be set vertically. For example, in a plane coordinate system, the center of the mirror 130 can be the origin, the first axis 21 is the Y axis, and the second axis 22 is the X axis.

The first detection unit 171 is respectively connected to the first connection frame 110 and the second connection frame 120, and the first detection unit 171 is used to detect the rotation angle of the second connection frame 120 relative to the first connection frame 110; the second detection unit 172 is connected to For the mirror 130 and the second connection frame 120 , the second detection unit 172 is used to detect the rotation angle of the mirror 130 relative to the second connection frame 120 .

For example, the first detection unit 171 may include a first Hall sensor, and the second detection unit 172 may include a second Hall sensor, and the mirror 130 and the second connection frame 120 are detected by the first Hall sensor and the second Hall sensor. angle of rotation. Alternatively, a Wheatstone bridge piezoresistive circuit can be formed on the first arm, the second arm, the third arm and the fourth arm by means of ion implantation, and the torsion angle of each arm can be detected by the Wheatstone bridge piezoresistive electric furnace to determine the The rotation angle of the mirror 130 and the second connection frame 120 .

The scanning galvanometer 10 provided by the embodiment of the present disclosure includes a first connection frame 110 , a second connection frame 120 , a mirror 130 , a first driver 140 and a second driver 150 , and the second connection frame 120 is disposed on the first connection frame 110 , the mirror 130 is set on the second connection frame 120 , the first driver 140 is set on the mirror 130 , the second driver 150 is set on the second connection frame 120 , the mirror 130 is driven by the first driver 140 , and the mirror 130 is driven by the second driver 150 The second connection frame 120 realizes the two-dimensional scanning of the scanning galvanometer 10, avoids setting two-dimensional galvanometers in the glasses, and reduces the weight of the glasses. In addition, the first driver 140 is disposed on the reflector 130 to reduce the volume of the scanning galvanometer 10 and further reduce the weight of the glasses.

Exemplary embodiments of the present disclosure also provide glasses, which include: a scanning galvanometer 10, a light source 20, and a display lens 30, where the light source 20 is opposite to the reflector 130, and is used for providing the light source 20 to the reflector 130; the display lens 30 is used for The light reflected by the reflecting mirror 130 is received, and enhanced display is realized.

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 arranged on the first connection frame 110, and the second The connection frame 120 is rotatable around the first axis 21 relative to the first connection frame 110; the reflector 130 is arranged on the second connection frame 120, and the reflector 130 is rotatable around the second axis 22 relative to the second connection frame 120, the first The axis 21 and the second axis 22 are not parallel; the first driver 140 is arranged on the mirror 130, and the first driver 140 is used to drive the mirror 130 to rotate relative to the second connection frame 120 around the first axis 21; the second driver 150 is arranged on For the second connection frame 120 , the second driver 150 is used to drive the second connection frame 120 to rotate relative to the first connection frame 110 around the second axis 22 .

It should be noted that, the scanning galvanometer 10 in the glasses provided by the embodiments of the present disclosure has been described in detail in the above embodiments, and will not be repeated here.

The glasses provided by the embodiments of the present disclosure include a scanning galvanometer 10 . In the scanning galvanometer 10 , the mirror 130 is driven by the first driver 140 , and the second connection frame 120 is driven by the second driver 150 , so that the scanning galvanometer 10 has two functions. Dimensional scanning avoids setting two-dimensional galvanometers in the glasses and reduces the weight of the glasses. In addition, the first driver 140 is disposed on the reflector 130 to reduce the volume of the scanning galvanometer 10 and further reduce the weight of the glasses.

The glasses provided by the embodiments of the present disclosure will be described in detail below:

The glasses provided by the embodiments of the present disclosure may be virtual reality glasses, augmented reality glasses, or mixed reality glasses. In addition, the glasses provided by the embodiments of the present disclosure may also be head-mounted devices similar to glasses, such as a helmet.

The glasses may include a frame (not shown), lenses and temples 40 connected to the frame and rotatable relative to the frame. The lens and the frame are connected, and the lens has the functions of light transmission and display. The display lens 30 may be a lens, or the display lens 30 may be a partial area on the lens, which is not specifically limited in this embodiment of the present disclosure.

Exemplarily, in the embodiment of the present disclosure, the glasses may include a first temple and a second temple, the first temple is arranged on one side of the frame, the first temple and the frame are hinged, and the second temple is arranged on the side of the frame. The other side of the frame, and the second temple and the frame are hinged.

In the embodiment of the present disclosure, the scanning galvanometer 10 and the light source 20 may be arranged on the temple 40. For example, the scanning galvanometer 10 and the light source 20 may be arranged on the first temple, or the scanning galvanometer 10 and the light source 20 may be arranged on the second temple. Two glasses legs.

Wherein, the temple 40 may be a hollow structure, that is, an accommodating cavity is provided on the temple 40, and the light source 20 and the galvanometer may be arranged in the accommodating cavity. The light source 20 has a light emitting portion, and the light emitting portion is opposite to the scanning galvanometer 10 to transmit the light emitted by the light source 20 to the scanning galvanometer 10 .

The scanning galvanometer 10 is disposed on the temple 40 . After the scanning galvanometer 10 is powered on, the mirror 130 is deflected in response to the driving signal, and reflects light to the display lens 30 . And through the scanning motion of the mirror 130, the light is transmitted to different areas of the display lens 30, so as to realize the display of multiple pixels.

In the embodiment of the present disclosure, the display lens 30 may be an optical waveguide lens, and the optical waveguide lens has a coupling part 31 and an outcoupling part 32 , the coupling part 31 is used for receiving the light reflected by the scanning galvanometer 10 , and the coupling part 32 is used for coupling The light is coupled out, and the coupling-out portion 32 is located at the position corresponding to the lens and the user's glasses.

For example, as shown in FIG. 3 , the light source 20 may be a laser transmitter, the laser generator is arranged on the temple 40 , and the light emitted by the laser transmitter is along the length direction of the temple 40 . That is, when the glasses are in the wearing state, the light emitted by the laser transmitter is perpendicular to the lens. The scanning galvanometer 10 and the laser emitter are arranged at 45 degrees, that is, the mirror 130 is at 45 degrees to the optical axis of the laser emitter in the initial state, and the initial state of the mirror 130 refers to the first driver 140 and the second The position of the mirror 130 when the driver 150 is not powered on. The light emitted by the laser transmitter changes its propagation direction through the scanning galvanometer 10 , and the reflected light can directly enter the coupling portion 31 of the display lens 30 . In this case, the coupling portion 31 of the display lens 30 may be located on the side of the display lens 30 .

Alternatively, as shown in FIG. 4 , the coupling portion 31 of the display lens 30 may be disposed on the inner side of the display lens 30 , and the inner side of the display lens 30 is the side facing the user when the glasses are worn. On this basis, the glasses provided by the embodiments of the present disclosure may further include an adjustment lens 50 , the adjustment lens 50 has a reflective surface, the reflective surface of the adjustment lens 50 faces the reflector 130 , and the adjustment lens 50 and the reflector 130 are parallel. The light emitted by the laser transmitter is transmitted to the coupling part 31 of the display lens 30 through two reflections of the scanning galvanometer 10 and the adjustment lens 50 .

The display lens 30 may include a mirror body, an in-coupling portion 31 , an out-coupling portion 32 and a transmission optical waveguide 33 . The two ends of the transmission optical waveguide 33 are respectively connected to the coupling-in portion 31 and the coupling-out portion 32 . The outgoing portion 32 can be embedded in the mirror body, or provided on the surface of the mirror body. The in-coupling portion 31 may be an in-coupling grating, and the coupling-out portion 32 may be an out-coupling grating. Of course, in the embodiment of the present disclosure, the display lens 30 may also be a reflective DOE (Difractive Optical Element, diffractive optical element) lens, etc., which is not specifically limited in the embodiment of the present disclosure.

Before the light enters the display lens 30, the light can also be expanded. For example, a beam expander is arranged between the scanning galvanometer 10 and the coupling part 31, and the beam expander is used to receive the light reflected by the reflector 130 and reflect the light. The light is expanded and transmitted to the display lens 30 .

The beam expander may be a concave mirror, and the concave mirror may be provided on the coupling portion 31 . For example, when light enters the display lens 30 from the side of the display lens 30 , the concave mirror may be provided on the side of the display lens 30 . When the light enters the display lens 30 from the inner side of the display lens 30 , the concave mirror may be arranged 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 like, and the glasses may display a monochromatic image. Alternatively, the light source 20 may also be a light source 20 of multiple colors, that is, the light source 20 may include laser emitters of multiple colors, for example, the light source 20 may include green, red, and blue laser emitters. The three-color light rays are irradiated to corresponding regions of the mirror 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 will affect the reflectivity of the reflector 130 . Reflectivity of the piezoelectric sheet 141 region. At this time, the light source 20 may include a first light source and a second light source, the light emitted by the first light source irradiates the normal reflection area of the reflector 130 , and the light emitted by the second light source irradiates the reflector 130 to set the first piezoelectric sheet 141 area. In order to prevent the first piezoelectric sheet 141 from affecting the light emitted by the second light source, thereby affecting the display effect, the light emitted by the second light source may be compensated, for example, by increasing the intensity of the light emitted by the second light source.

For example, the compensation value of the second light source can be determined by calibration, the first light beam and the second light beam reflected by the mirror 130 are respectively measured, and the driving signal of the second light source is adjusted until the first light beam reflected by the mirror 130 is adjusted. The intensity of the light beam and the second light beam are the same. 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 map. Then, the brightness of the first light beam is adjusted, and the driving signal of the second light source is adjusted again. The mapping relationship between the first light beam and the driving signal of the first light source and the driving signal of the second light source is obtained in this way, and the corresponding driving signal of the second light source can be determined by the mapping relationship in use. 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, only the normal reflection area of the reflector 130 can be used for reflection, and the first piezoelectric sheet 141 does not reflect light to solve the problem of light difference, which is not limited to this embodiment of the present disclosure.

As shown in FIG. 5 , the glasses provided by 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 the driving of the light source 20 according to the gray level of the target pixel signal, and the driving signal of the scanning galvanometer 10 is determined according to the position of the target pixel. The control module 60 can be disposed on the frame, and of course, in practical applications, the control module 60 can also be disposed on the temple 40 and other parts, which are 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 lighting control module 65 . The power management module 61 is connected to the battery and each electrical component, and the power management module 61 is used to convert the electrical energy provided by the battery into an electrical signal required by each electrical component and transmit it to each electrical component. The main control chip 62 is connected to the power management module 61 , the communication module 63 , the scanning control module 64 and the lighting control module 65 , and the main control chip 62 is used for display and information processing. The communication module 63 is used for communication with other electronic devices, the scanning control module 64 is used for outputting driving signals for the position of the target pixel, and the scanning control module 64 is connected with the scanning galvanometer 10 to provide the scanning galvanometer 10 with driving signals. The light emission control module 65 is used for determining the light emission intensity of the laser emitter according to the gray level of the target pixel.

The communication module 63 may be a Bluetooth communication module, and the glasses communicate with electronic devices such as mobile phones through the Bluetooth communication module. Among them, some operations in the glasses can be performed by borrowing the computing power of the electronic device.

For example, when the glasses are performing augmented reality display, the calculation of the driving electrical signal of the scanning galvanometer 10 and the driving signal of the light source 20 can be performed in the mobile phone, and the driving current and driving voltage of the scanning galvanometer 10 and the light source can be obtained by calculation in the mobile phone. After the driving current and driving voltage of 20 , the driving current and driving voltage of the scanning galvanometer 10 and the driving current and 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 according to the driving current and driving voltage of the scanning galvanometer 10 sent by the mobile phone, and the driving current and driving voltage of the light source 20, and controls the light source 20 to drive The modules provide corresponding voltages and currents to the light source 20 .

Of course, in the example of the present disclosure, the calculation of the driving current and driving voltage of the scanning galvanometer 10, and the driving current and driving voltage of the light source 20 can also be performed in the main control chip 62, which is not limited to this embodiment of the present disclosure.

In the embodiment of the present disclosure, the scan driving module may provide corresponding driving signals to the first driver 140 and the second driver 150 . For example, the scan driving module may provide the first driver 140 with the first direction driving signal and the second driver 150 with the second direction driving signal. For example, the driving signal in the first direction may be a driving signal in which a 60 Hz square wave and a high frequency sine wave are superimposed, and the driving signal in the second direction 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, the two factors of display, pixel and pixel display, are respectively formed by the scanning of the scanning galvanometer 10 and the display time modulation of the light source 20 (laser). The scanning of the scanning galvanometer 10 forms the entire display plane, so that the spatial position corresponds to the rotation angle of the scanning galvanometer 10 point by point, and multiple tests and careful calibration can be carried out, so as to correspond to a specific angle of rotation and a certain display plane. One-to-one correspondence. The intensity of the displayed content is realized by the modulation of the laser transmitter. The intensity and brightness of the light emitted by the laser correspond to the display and grayscale of a certain pixel at a spatial position.

Because in the application processor, the information displayed in the digital image is only the pixel position coordinates and the corresponding grayscale value. Therefore, in this embodiment, the scanning galvanometer 10 needs to convert the corresponding position coordinates and grayscale values into the piezoelectric voltage pair value for driving the scanning galvanometer 10 and the current value for the brightness modulation of the laser. In the hardware circuit, the display information needs to be processed at the application processor and converted into the driving voltage change of the scanning galvanometer 10 and the pumping voltage change of the laser, so as to realize the display function.

In the embodiment of the present disclosure, the minimum monochromatic green laser light source can be used, and after shaping, it is incident on the scanning galvanometer 10 , and the galvanometer drive, the drive of the light source 20 and the main control can be dispersed and arranged on the frame of the glasses through connecting lines, so that Keep only the laser transmitter and the scanning galvanometer 10 at the temples. The light reflected by the galvanometer passes through a convex mirror, expands the beam, passes through the coupling port, and is coupled into the waveguide sheet, thereby displaying information on the monochromatic waveguide sheet.

Based on the glasses provided by the embodiments of the present disclosure, the structural light path and hardware size can reach the simplest hardware space and weight at present, which can ensure that the AR glasses have the same wearing experience as conventional glasses, thereby accelerating the market acceptance of the AR glasses.

The glasses provided by the embodiments of the present disclosure may include one or more scanning galvanometers 10 . When the glasses include one scanning galvanometer 10 , one scanning galvanometer 10 traverses all pixels on the display lens 30 to realize display during the scanning process. When the glasses include a plurality of scanning galvanometers 10, the plurality of scanning galvanometers 10 can be distributed in an array. At this time, the display area on the display lens 30 can be divided into a plurality of areas during the scanning process. The number of pixels in each area is equal to The number of scanning galvanometers 10 is the same, and the display area can be scanned area by area during scanning.

The glasses provided by the embodiments of the present disclosure include a scanning galvanometer 10 . In the scanning galvanometer 10 , the mirror 130 is driven by the first driver 140 , and the second connection frame 120 is driven by the second driver 150 , so that the scanning galvanometer 10 has two functions. Dimensional scanning avoids setting two-dimensional galvanometers in the glasses and reduces the weight of the glasses. In addition, the first driver 140 is arranged on the reflector 130 to reduce the volume of the scanning galvanometer 10 , further reduce the weight of the glasses, and realize the thinning of the augmented reality glasses.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

Claims (10)

1. a scanning galvanometer mirror, is characterized in that, described scanning galvanometer mirror comprises: the first connection frame; a second connecting frame, the second connecting frame is arranged on the first connecting frame, and the second connecting frame is rotatable around a first axis relative to the first connecting frame; a reflector, the reflector is arranged on the second connection frame, and the reflector can rotate around a second axis relative to the second connection frame, and the first axis and the second axis are not parallel; a first driver, the first driver is arranged on the mirror, and the first driver is used to drive the mirror to rotate around the first axis relative to the second connection frame; A second driver, the second driver is arranged on the second connection frame, and the second driver is used to drive the second connection frame to rotate around the second axis relative to the first connection frame. 2 . The scanning galvanometer according to claim 1 , wherein the first connecting frame has a first accommodating cavity, the second connecting frame is connected to the first accommodating cavity, and the second connecting frame is connected to the first accommodating cavity. The connecting frame has a second accommodating cavity, and the mirror is arranged in the second accommodating cavity. 3. The scanning galvanometer of claim 1, wherein the first driver comprises: a first piezoelectric sheet, the first piezoelectric sheet is arranged on the reflection surface of the reflector; A second piezoelectric sheet, the second piezoelectric sheet is arranged on the back of the reflector, and the first piezoelectric sheet and the second piezoelectric sheet are respectively located on both sides of the second axis. 4. The scanning galvanometer of claim 3, wherein the second driver comprises: a third piezoelectric sheet, the third piezoelectric sheet is arranged on one side of the second connection frame; A fourth piezoelectric sheet, the fourth piezoelectric sheet is arranged on the other side of the second connection frame, and the third piezoelectric sheet and the fourth piezoelectric sheet are respectively located on two sides of the first axis. side. 5. The scanning galvanometer of claim 1, wherein the scanning galvanometer further comprises: A base, the first connection frame is connected to the base, a power supply circuit is arranged in the base, and the power supply circuit is respectively connected to the first driver and the second driver. 6. The scanning galvanometer of claim 1, wherein the scanning galvanometer further comprises: A first detection unit, the first detection unit is respectively connected to the first connection frame and the second connection frame, and the first detection unit is used to detect the second connection frame relative to the first connection frame angle of rotation; A second detection unit, the second detection unit is respectively connected to the mirror and the second connection frame, and the second detection unit is used to detect the rotation angle of the mirror relative to the second connection frame. 7. A kind of glasses, it is characterized in that, described glasses comprise: The scanning galvanometer according to any one of claims 1-6; a light source, the light source is opposite to the reflector, and is used for providing a light source to the reflector; The display lens is used for receiving the light reflected by the reflecting mirror and realizing enhanced display. 8. The glasses of claim 7, wherein the glasses further comprise: a control module, the control module is respectively connected to the scanning galvanometer and the light source, the control module determines the driving signal of the light source according to the gray scale of the target pixel, and determines the scanning according to the position of the target pixel The drive signal of the galvanometer. 9. The glasses of claim 8, wherein the display lens comprises: An optical waveguide, the optical waveguide has a coupling part, and the coupling part is used for receiving the light transmitted by the scanning galvanometer. 10. The glasses of claim 7, wherein the glasses further comprise: The temple is connected to the display lens, and the light source and the scanning galvanometer are arranged on the temple.

Images