CN112666701B - Electronic device and adjusting method thereof - Google Patents

Abstract

The embodiment of the application provides electronic equipment and an adjusting method of the electronic equipment, relates to the technical field of display, and can solve the problem of visual distortion when a user watches pictures displayed by an optical fiber scanning display. The electronic device includes: the optical fiber scanning display is used for emitting a first laser beam, and a first display picture projected by the first laser beam is a free-form surface; the first laser beam enters the lens group and is emitted out as a second laser beam, and a second display picture projected by the second laser beam is a plane; and the second laser beam enters the optical waveguide and is adjusted to be emitted as a third laser beam, and a third display picture projected by the third laser beam is a plane.

Description

Electronic device and method for adjusting electronic device

technical field

The present application relates to the field of display technology, and in particular to an electronic device and an adjustment method for the electronic device.

Background technique

Among the existing display solutions, display modules such as Liquid Crystal on Silicon (LCOS for short), digital micromirror device (DMD), and multi-zone light distribution independent control light-emitting diode (uLED) have been maturely applied in display field. As for the optical fiber scanning display, when users watch the displayed picture, there are still certain problems, such as the problem of visual distortion.

Contents of the invention

Embodiments of the present application provide an electronic device and a method for adjusting the electronic device, so as to improve the above problems.

In a first aspect, an electronic device is provided, including: a fiber optic scanning display, a lens group, and an optical waveguide. The optical fiber scanning display is used to emit the first laser beam, and the first display picture projected by the first laser beam is a free-form surface. The lens group, the first laser beam enters the lens group and exits as the second laser beam, and the second display picture projected by the second laser beam is a plane. The optical waveguide, the second laser beam enters the optical waveguide and exits as the third laser beam, and the third display picture projected by the third laser beam is a plane.

In a second aspect, AR glasses are provided. The AR glasses body includes a frame, and a fiber optic scanning display and a lens group are arranged on the frame.

In the third aspect, a method for adjusting an electronic device is provided, including: the optical fiber scanning display emits a first laser beam, and the first display picture projected by the first laser beam is a free-form surface; the lens group receives and reflects an effective laser beam, and uses the first laser beam The second laser beam is emitted, and the second display screen projected by the second laser beam is flat; the optical waveguide receives the second laser beam, and is adjusted to emit the third laser beam, and the third display screen projected by the third laser beam is flat.

In the electronic device and the method for adjusting the electronic device provided in the embodiments of the present application, the electronic device includes an optical fiber scanning display, a lens group, and an optical waveguide. The first display picture projected by the effective laser beam emitted from the fiber-optic scanning display is a free-form surface, and a lens group can be arranged on the light-emitting side of the fiber-optic scanning display. The lens group can correct the optical path of the first laser beam, so that the light emitted from the lens group The second display image projected by the second laser beam is flat, and after the second laser beam is reflected or diffracted by the optical waveguide, the third display image projected by the outgoing third laser beam is still flat. Since the user sees the third display screen in the form of a plane surface instead of the first display screen in the form of a free curved surface when viewing the overall display screen of the electronic device, it can improve the user's viewing of the display screen of the electronic device. There is a problem with visual distortion. On this basis, since the first laser beam emitted from the optical fiber scanning display has good directivity and a small divergence angle, it is more convenient to use the lens group to adjust the first laser beam.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the display picture that causes visual distortion provided by the prior art;

Figure 2 provides the positional relationship and optical path diagram of each component in the electronic device according to the embodiment of the present application;

Fig. 3 is the optical path diagram of the effective laser beam emitted from the fiber optic scanning display provided by the embodiment of the present application;

Figure 4a is an optical path diagram of the second laser beam emitted from the lens group provided by the embodiment of the present application;

Fig. 4b is the second display screen provided by the embodiment of the present application;

FIG. 5 is an optical path diagram of the second laser beam emitted from the lens group provided by the embodiment of the present application;

FIG. 6 is a grid scan diagram of the fiber cantilever provided in the embodiment of the present application;

Figure 7a is an optical path diagram of an effective laser beam emitted from a fiber optic scanning display provided in an embodiment of the present application;

Fig. 7b is an optical path diagram of an effective laser beam emitted from a fiber optic scanning display provided in an embodiment of the present application;

FIG. 8 is an optical path diagram of an effective laser beam emitted from a fiber optic scanning display provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

FIG. 10 is a flow chart of adjusting an electronic device provided by an embodiment of the present application.

Reference signs:

10-electronic equipment; 11-fiber optic scanning display; 111-first laser beam; 12-lens group; 121-second laser beam; 122-first converging lens; 123-second converging lens; 124-diverging lens; 125 - the third converging lens; 126 - the fourth converging lens; 13 - optical waveguide; 14 - light shielding layer; 15 - mirror frame.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. It should be noted that, in the case of no conflict, the features in the embodiments of the present application may be combined with each other.

As mentioned in the background art, when a user watches a picture displayed on an optical fiber scanning display, there is also a problem of visual distortion. Among them, the cause of visual distortion is: when the fiber cantilever of the fiber optic scanning display scans, its scanned trajectory is a free-form surface, and the shape of the picture formed by the light rays emitted from the fiber-optic scanning display is the free-form surface shown in FIG. 1 .

In order to solve the technical problems raised by the background technology, the inventor proposes the following solutions after research, so as to improve the problem of visual distortion when the user watches the picture displayed by the optical fiber scanning display.

As shown in FIG. 2 , an embodiment of the present application provides an electronic device 10 , including: a fiber optic scanning display 11 , a lens group 12 and an optical waveguide 13 . Please also refer to FIG. 3 , the optical fiber scanning display 11 is used to emit a first laser beam 111 , and the shape of the first display screen projected by the first laser beam is a free-form surface. As shown in FIG. 4 a , the first laser beam enters the lens group 12 and exits as the second laser beam 121 , and the second display image projected by the second laser beam 121 is a plane ( FIG. 4 b ). The second laser beam enters the optical waveguide 13 and is adjusted to emit the third laser beam 131 . The third display image projected by the third laser beam 131 is a plane.

In some embodiments, the first display frame projected by the first laser beam emitted from the optical fiber scanning display 11, the second display frame projected by the second laser beam 121 emitted from the lens group 12, and the third display frame projected from the optical waveguide 13 Among the third display screens formed by the laser beam 131 , the screen that the user actually sees is the third display screen.

In some embodiments, all of the first laser beam 111 may be incident on the lens group 12 ; or, a part of the first laser beam 111 may be incident on the lens group 12 .

In some embodiments, the specific composition of the lens group 12 and the specific parameters of each component are not limited, as long as the first laser beam 111 entering the lens group 12 exits the lens group 12 as the second laser beam 121, the second laser beam The second display image projected by the light beam 121 only needs to be a plane.

Wherein, the optical path of the first laser beam emitted from the optical fiber scanning display 11 at each pixel point can be collected, according to the free-form surface type, the imaging surface of the planar surface type formed by the first laser beam, and the emission direction of the second laser beam 121 The geometric positional relationship among them is fitted by using optical software, and the specific composition of the lens group 12 and the specific parameters of each component can be obtained. After the first laser beam 111 enters the lens group 12 , it may be imaged in the lens group 12 at least once according to the specific composition of the lens group 12 .

Optionally, referring to FIG. 5 , along the direction away from the light receiving surface of the lens group 12 , the lens group 12 includes a first converging lens group, a diverging lens group, and a second converging lens group arranged in sequence. The first converging lens group is used for converging the effective laser beam, the diverging lens group is used for diverging the effective laser beam, and the second converging lens group is used for converging the first laser beam and making the second laser beam enter the optical waveguide 13 .

After the first laser beam is converged by the first converging lens group, it can become a reduced image, so that the distance between each first laser beam in the reduced image can be formed along the vertical direction from the light-receiving surface of the lens group 12 to the light-emitting surface. The distance decreases. Compared with the first display screen, the shape of the reduced image at this time is closer to the plane; after that, the first laser beam passes through the diverging lens to form an enlarged image, and the enlarged image formed by the diverging lens group , which is smaller than the image formed by the first laser beam passing through the first converging lens group, by enlarging the first laser beam, it can meet the user's viewing needs and prevent the user from seeing too small a picture; finally, the second converging lens group, the first laser beams are converged again, so that the distance between the first laser beams in the reduced image approaches zero along the vertical direction from the light-receiving surface to the light-emitting surface of the lens group 12, that is, A second display image in the shape of a plane is obtained, and the second laser beam emitted from the lens group 12 is made to enter the optical waveguide 13 as much as possible.

The specific composition of the first converging lens group, the diverging lens group, and the second converging lens group is not limited.

Exemplary, as shown in Figure 5, along the direction away from the light-receiving surface of the lens group 12, the lens group 12 includes a first converging lens 122, a second converging lens 123, a diverging lens 124, a third converging lens 125 and The fourth converging lens 126 ; the first converging lens 122 , the second converging lens 123 , the third converging lens 125 , and the fourth converging lens 126 are used to converge the effective laser beam, and the diverging lens is used to diverge the effective laser beam.

After the first laser beam is converged by the first converging lens 122 and the second converging lens 123, it can be reduced into a reduced image, so that each of the reduced images can be formed along the vertical direction from the light receiving surface to the light emitting surface of the lens group 12. The distance between the laser beams is reduced, and compared with the first display screen, the shape of the reduced image at this time is closer to a plane; after that, the first laser beam passes through the diverging lens 124 to form an enlarged image, and passes through the diverging lens The magnified image formed by 124 is smaller than the image formed by the first laser beam passing through the first converging lens 122. By enlarging the first laser beam, it can meet the user's viewing needs and prevent the user from seeing too small a picture; finally , and then through the third converging lens 125 and the fourth converging lens 126, the first laser beams are converged again, so that each first laser beam in the reduced image can be formed along the vertical direction from the light receiving surface to the light emitting surface of the lens group 12. The distance between the laser beams is close to zero, so that the second display image in the shape of a plane can be obtained, and the second laser beams emitted from the lens group 12 are incident into the optical waveguide 13 as much as possible.

In some embodiments, the optical waveguide 13 can adjust the optical path of the second laser beam, and the optical waveguide 13 includes an optical waveguide body, an in-coupling grating, and an out-coupling grating. Wherein, the optical waveguide body can be a diffraction type or a total reflection type.

If the optical waveguide 13 is a diffractive type, after the second laser beam 121 enters the optical waveguide 13 through the coupling-in grating, it can be diffracted in the optical waveguide 13, and finally exits with the third laser beam 131 through the coupling-out grating; if the optical waveguide 13 If it is a total reflection type, the second laser beam 121 enters the optical waveguide 13 through the in-coupling grating, can be diffracted in the optical waveguide 13, and finally exits as the third laser beam 131 through the out-coupling grating.

In some embodiments, the fiber-optic scanning display 11 may include a fiber-optic cantilever and a mechanical driving structure, and the mechanical-driving structure may drive the fiber-optic cantilever to scan. The embodiment of the present application does not limit the scanning mode of the fiber-optic cantilever.

Optionally, as shown in FIG. 6 , the mechanical driving structure can drive the fiber cantilever to scan in a grid format. In this case, the mechanical drive structure may for example comprise a plurality of piezoelectric structures or a plurality of electromagnets.

A plurality of piezoelectric structures are respectively arranged above, below, left and right of the fiber cantilever, or a plurality of electromagnets are respectively arranged above, below, left and right of the fiber cantilever.

Taking the mechanical driving structure including multiple piezoelectric structures as an example, the piezoelectric structure includes a first electrode layer, a piezoelectric material layer, and a second electrode layer stacked in sequence. The input voltage of the electrode layer causes the deformation of the piezoelectric material layer, the deformation of the piezoelectric material layer, and the deformation of the entire piezoelectric structure, which in turn causes the fiber cantilever to move. By adjusting the voltage acting on multiple piezoelectric structures, the optical fiber can be adjusted. The direction of motion of the cantilever enables the fiber cantilever to scan in a raster format.

Taking the mechanical drive structure including multiple electromagnets as an example, under the action of the electromagnets, the fiber cantilever can move towards the electromagnet or away from the electromagnet. By adjusting the magnetism and magnetic field strength of the multiple electromagnets, the fiber cantilever Realize raster scanning.

On this basis, the fiber optic scanning display 11 may also include a mechanical controller, and the mechanical controller may control the mechanical controller to work when the power management IC (PMIC) provides power supply voltage to the mechanical driving structure.

In some embodiments, the fiber scanning display 11 may further include a light source and a control chip, the light source may emit laser light as the display light of the fiber scanning display 11, and the control chip may control the brightness of the laser light emitted by the light source.

In some embodiments, as shown in FIG. 3 , the shape of the first display screen is not limited, and the shape of the first display screen is related to the displacement track of the fiber cantilever. For example, the shape of the first display picture may be a hemisphere, a half ellipsoid, a parabola, an irregular curved surface, and the like. In some embodiments, as shown in FIG. 4 a , the specific shape of the second display picture is not limited, as long as the shape of the second display picture is a plane. For example, the shape of the second display picture may be a rectangle, a circle, an ellipse, and the like.

On this basis, since the second laser beam 121 enters the optical waveguide 13, it emits total reflection or diffraction in the optical waveguide 13, and total reflection occurs along the vertical direction between the light incident surface of the optical waveguide 13 and the light exit surface of the optical waveguide 13. Or the path components of the diffracted second laser beam 121 in the vertical direction are the same, therefore, the third display picture is still a plane.

In some embodiments, the use of the electronic device 10 is not limited, for example, the electronic device can be applied to smart wearable devices, smart home devices and the like. Wherein, the smart wearable device may be, for example, augmented reality (Augmented Reality, AR for short), virtual reality technology (Virtual Reality, VR for short), smart watch, etc., and the smart home device may be a smart TV, a smart control panel, and the like.

In some embodiments, the relative positional relationship between the optical fiber scanning display 11, the lens group 12, and the optical waveguide 13 is related to the use of the electronic device 10, and the relative positional relationship between the three is not limited, as long as the optical fiber scanning display The first laser beam emitted from 11 may enter the lens group 12 , and the second laser beam 121 emitted from the lens group 12 may enter the optical waveguide 13 . FIG. 2 shows a relative positional relationship among the optical fiber scanning display 11 , the lens group 12 , and the optical waveguide 13 , and of course the relative positional relationship among the three can also be other.

An embodiment of the present application provides an electronic device 10 , and the electronic device 10 includes a fiber optic scanning display 11 , a lens group 12 , and an optical waveguide 13 . The first display picture projected by the first laser beam emitted from the fiber scanning display 11 is a free-form surface, and a lens group 12 can be arranged on the light emitting side of the fiber scanning display 11, and the lens group 12 can correct the optical path of the first laser beam, so that The second display image projected by the second laser beam 121 emitted from the lens group 12 is flat, and then the second laser beam 121 is reflected or diffracted by the optical waveguide 13, and the third display image projected by the emitted third laser beam 131 is still flat. for the plane. Since the user sees the third display screen of the electronic device 10 instead of the first display screen of the free curved surface when viewing the overall display screen of the electronic device 10, it can improve the user's viewing of the display screen of the electronic device 10. , the problem of visual distortion occurs. On this basis, since the first laser beam 111 emitted from the fiber optic scanning display 11 has good directivity and a small divergence angle, it is more convenient to use the lens group 12 to adjust the first laser beam 111 .

Optionally, the first laser beam includes an effective laser beam, and the effective laser beam passes through the lens group 12 and the optical waveguide 13 to emerge as a third laser beam, and the shape of the third display screen projected by the third laser beam is rectangular, and the length and width are Ratio is the preset ratio.

Wherein, the preset ratio may be, for example, 4:3. In this way, the user can not only watch a 4:3 display screen, but also watch a 16:9 display screen and a 1:1 display screen. Certainly, the preset ratio may also be other ratios, which are not specifically limited in this embodiment of the present application.

In some embodiments, if the first laser beam passes through the lens group 12 and the optical waveguide 13, the shape of the third display screen projected by the emitted third laser beam is rectangular, and the aspect ratio of the third display screen is preset ratio, the effective laser beam can be equal to the first laser beam; if the first laser beam passes through the lens group 12 and the optical waveguide 13, the shape of the third display screen projected by the emitted third laser beam is not rectangular, then the effective The laser beam may be part of the first laser beam.

Wherein, the effective laser beam is the light actually incident on the lens group 12 in the first laser beam.

In the embodiment of the present application, by adjusting the shape of the third display screen to be a rectangle and adjusting the aspect ratio of the rectangle to a preset ratio, display requirements of different electronic devices 10 and viewing requirements of different users can be met.

The third display picture is obtained by projecting the third laser beam 131. The third laser beam 131 is the light diffracted or reflected by the second laser beam 121 through the optical waveguide 13. The second laser beam 121 is the effective laser beam emitted by the lens group 12. light. Therefore, the specific shape of the third display screen can be controlled by the effective laser beam entering the lens group 12 .

Optionally, as shown in Figures 7a and 7b, the electronic device 10 further includes a light-shielding layer 14, the light-shielding layer 14 is arranged on the light-emitting side of the optical fiber scanning display 11, and the light-shielding layer 14 is used to shield the first laser beam 111 except the effective laser beam Beams other than laser beams.

The light shielding layer 14 can be used to shield the first laser beam 111 except for the effective laser beam to be absorbed or reflected by the light shielding layer 14 , so that it cannot be emitted from the fiber optic scanning display 11 . In this way, by adjusting the position of the light-shielding layer 14 , the part of the first laser beam 111 that belongs to the effective laser beam can be determined, and then the shape of the third display screen can be adjusted.

Wherein, since the divergence angle of the first laser beam 111 emitted from the optical fiber scanning display 11 is relatively small, the effective laser beam is basically a light with a small angle. Among the light emitted from the part of the optical fiber scanning display 11 that is not blocked by the light-shielding layer 14 and is closer to the light-shielding layer 14, the part with a certain divergence angle has a smaller divergence angle and a lower light intensity. Therefore, in the ambient light Under the interference of the ray, the third display image that the user actually sees is a rectangle with a preset aspect ratio, and other light rays can be ignored.

In some embodiments, the specific location of the light-shielding layer 14 is not limited, as long as the third display frame is a rectangle, and the aspect ratio of the rectangle satisfies a preset ratio.

Exemplarily, as shown in Figure 7a, the fiber optic scanning display 11 includes a display area and a frame area located at the periphery of the display area, and the light-shielding layer 14 can be arranged in the edge area of the display area close to the frame area; as shown in Figure 7b, the light-shielding layer 14 It can also be set in half of the complete display area.

In order to make the first laser beam 111 more applied to the display, so as to reduce the power consumption of the optical fiber scanning display 11 under the same display brightness, the light shielding layer 14 can optionally be arranged in the edge area of the display area close to the frame area, and The light-shielding layer 14 covers the display area of the fiber optic scanning display 11 as little as possible.

In the embodiment of the present application, the light-shielding layer 14 can be used to shield the first laser beam 111 except for the effective laser beam. The shape of is a rectangle, and the aspect ratio of the rectangle satisfies the preset ratio.

Optionally, as shown in FIG. 8 , the lens group 12 is arranged on the light-emitting side of the fiber optic scanning display 11 , and the range of the effective laser beam projected onto the lens group 12 is the same as the range of the light-receiving surface of the lens group 12 .

The effective laser light that can be incident in the lens group 12 in the first laser beam 111 can be adjusted by adjusting the relative positional relationship between the lens group 12 and the optical fiber scanning display 11, and the position of the light-receiving surface of the lens group 12 in the lens group 12. The range of the beam.

In the embodiment of the present application, by making the range of the effective laser beam projected on the lens group 12 the same as the range of the light receiving surface of the lens group 12, the effective laser beam is incident on the lens group 12, avoiding the first laser beam 111 Light rays other than the active laser beam enter the lens group 12 .

In addition, only the effective laser beams of the first laser beams 111 may be incident on the lens group 12 and used for display in other ways, which is not specifically limited in this embodiment of the present application.

As shown in FIG. 9 , the electronic device 10 may be AR glasses.

On this basis, the AR glasses body includes a frame 15 on which the optical fiber scanning display 11 and the lens group 12 are disposed.

In some embodiments, the specific arrangement positions of the fiber optic scanning display 11 and the lens group 12 are not limited. The optical fiber scanning display 11 and the lens group 12 can be arranged at different positions of the mirror frame 15 , wherein the lens group 12 can be arranged close to the optical waveguide 13 .

In order to avoid seeing the fiber optic scanning display 11 and the lens group 12 in the peripheral vision range of the user, thereby affecting the viewing experience of the user, the embodiment of the present application can not affect the effective laser beam incident on the lens group 12, the second laser beam 121 incident on the In the case of the optical waveguide 13, the optical fiber scanning display 11 and the lens group 12 are arranged as far away from the lens frame as possible. For example, when a user wears AR glasses, the optical fiber scanning display 11 and the lens group 12 are located behind the head of the glasses frame.

In some embodiments, the optical waveguide 13 can be arranged on the frame 15 or other positions on the body of the AR glasses, as long as the third laser beam 131 emitted from the optical waveguide 13 can enter the human eye.

Optionally, the optical waveguide 13 can be arranged on the mirror frame. In this way, the third display image can be presented directly to human eyes, thereby improving user experience.

In addition, the AR glasses may further include a main control chip, a video adjustment module, an audio adjustment module, Bluetooth, a Wireless-Fidelity (Wireless-Fidelity, WiFi for short) module, and the like. Among them, the main control chip is used to coordinate the work of various devices in the AR glasses.

As shown in FIG. 10, the embodiment of the present application also provides a method for adjusting an electronic device, including:

S110 , the optical fiber scanning display 11 emits a first laser beam 111 , and the first display image projected by the first laser beam is a free-form surface.

In some embodiments, all of the first laser beam 111 may be incident on the lens group 12 ; or, a part of the first laser beam 111 may be incident on the lens group 12 .

In some embodiments, as shown in FIG. 3 , the shape of the first display screen is not limited, and the shape of the first display screen is related to the displacement track of the fiber cantilever. For example, the shape of the first display picture may be a hemisphere, a half ellipsoid, a parabola, an irregular curved surface, and the like.

S120. The lens group 12 receives the first laser beam and emits the second laser beam 121, and the second display image projected by the second laser beam 121 is a plane.

In some embodiments, the specific composition of the lens group 12 and the specific parameters of each component are not limited, as long as the first laser beam 111 entering the lens group 12 exits the lens group 12 as the second laser beam 121, the second laser beam The second display image projected by the light beam 121 only needs to be a plane.

Wherein, the optical path of the first laser beam emitted from the optical fiber scanning display 11 at each pixel point can be collected, according to the free-form surface type, the imaging surface of the planar surface type formed by the first laser beam, and the emission direction of the second laser beam 121 The geometric positional relationship among them is fitted by using optical software, and the specific composition of the lens group 12 and the specific parameters of each component can be obtained. After the first laser beam 111 enters the lens group 12 , it may be imaged in the lens group 12 at least once according to the specific composition of the lens group 12 .

Exemplary, as shown in Figure 5, along the direction away from the light-receiving surface of the lens group 12, the lens group 12 includes a first converging lens 122, a second converging lens 123, a diverging lens 124, a third converging lens 125 and The fourth converging lens 126 ; the first converging lens 122 , the second converging lens 123 , the third converging lens 125 , and the fourth converging lens 126 are used to converge the effective laser beam, and the diverging lens is used to diverge the effective laser beam.

After the first laser beam is converged by the first converging lens 122 and the second converging lens 123, it can be reduced into a reduced image, so that each of the reduced images can be formed along the vertical direction from the light receiving surface to the light emitting surface of the lens group 12. The distance between the laser beams is reduced, and compared with the first display screen, the shape of the reduced image at this time is closer to a plane; after that, the first laser beam passes through the diverging lens 124 to form an enlarged image, and passes through the diverging lens The magnified image formed by 124 is smaller than the image formed by the first laser beam passing through the first converging lens 122. By enlarging the first laser beam, it can meet the user's viewing needs and prevent the user from seeing too small a picture; finally , and then through the third converging lens 125 and the fourth converging lens 126, the first laser beams are converged again, so that each first laser beam in the reduced image can be formed along the vertical direction from the light receiving surface to the light emitting surface of the lens group 12. The distance between the laser beams is close to zero, and the second display picture in the shape of a plane can be obtained.

In some embodiments, as shown in FIG. 4 a , the specific shape of the second display picture is not limited, as long as the shape of the second display picture is a plane. For example, the shape of the second display picture may be a rectangle, a circle, an ellipse, and the like.

S130, the optical waveguide 13 receives and adjusts the second laser beam 121, and emits the third laser beam 131, and the third display image projected by the third laser beam 131 is a plane.

In some embodiments, the first display frame projected by the first laser beam emitted from the optical fiber scanning display 11, the second display frame projected by the second laser beam 121 emitted from the lens group 12, and the third display frame projected from the optical waveguide 13 Among the third display screens projected by the laser beam 131 , the screen that the user actually sees is the third display screen.

In some embodiments, the optical waveguide 13 can adjust the optical path of the second laser beam, and the optical waveguide 13 includes an optical waveguide body, an in-coupling grating, and an out-coupling grating. Wherein, the optical waveguide body can be a diffraction type or a total reflection type.

If the optical waveguide 13 is a diffractive type, after the second laser beam 121 enters the optical waveguide 13 through the coupling-in grating, it can be diffracted in the optical waveguide 13, and finally exits with the third laser beam 131 through the coupling-out grating; if the optical waveguide 13 If it is a total reflection type, the second laser beam 121 enters the optical waveguide 13 through the in-coupling grating, can be diffracted in the optical waveguide 13, and finally exits as the third laser beam 131 through the out-coupling grating.

In some embodiments, since the shape of the second display picture formed by the second laser beam 121 is a plane, and after the second laser beam 121 enters the optical waveguide 13, it emits total reflection or diffraction in the optical waveguide 13, and along the optical waveguide 13 In the vertical direction between the light incident surface of the optical waveguide 13 and the light exit surface of the optical waveguide 13, the path components of the totally reflected or diffracted second laser beam 121 in the vertical direction are the same, therefore, the third display screen is still a plane.

An embodiment of the present application provides a method for adjusting an electronic device 10 . The electronic device 10 includes a fiber optic scanning display 11 , a lens group 12 , and an optical waveguide 13 . The first display picture projected by the first laser beam emitted from the fiber scanning display 11 is a free-form surface, and a lens group 12 can be arranged on the light emitting side of the fiber scanning display 11, and the lens group 12 can correct the optical path of the first laser beam, so that The second display image projected by the second laser beam 121 emitted from the lens group 12 is flat, and then the second laser beam 121 is reflected or diffracted by the optical waveguide 13, and the third display image projected by the emitted third laser beam 131 is still flat. for the plane. Since the user sees the third display screen of the electronic device 10 instead of the first display screen of the free curved surface when viewing the overall display screen of the electronic device 10, it can improve the user's viewing of the display screen of the electronic device 10. , the problem of visual distortion occurs. On this basis, since the first laser beam 111 emitted from the fiber optic scanning display 11 has good directivity and a small divergence angle, it is more convenient to use the lens group 12 to adjust the first laser beam 111 .

Optionally, the first laser beam includes an effective laser beam, and the effective laser beam passes through the lens group 12 and the optical waveguide 13 to emerge as a third laser beam, and the shape of the third display screen projected by the third laser beam is plane, and the length and width are Ratio is the preset ratio.

Wherein, the preset ratio may be, for example, 4:3. In this way, the user can not only watch a 4:3 display screen, but also watch a 16:9 display screen and a 1:1 display screen. Of course, the preset ratio may also be other ratios, which are not specifically limited in this embodiment of the present application.

In some embodiments, if the first laser beam passes through the lens group 12 and the optical waveguide 13, the shape of the third display screen projected by the emitted third laser beam is rectangular, and the aspect ratio of the third display screen is preset ratio, the effective laser beam can be equal to the first laser beam; if the first laser beam passes through the lens group 12 and the optical waveguide 13, the shape of the third display screen projected by the emitted third laser beam is not rectangular, then the effective The laser beam may be part of the first laser beam.

Wherein, the effective laser beam is the light actually incident on the lens group 12 in the first laser beam.

In the embodiment of the present application, by adjusting the shape of the third display screen to be a rectangle and adjusting the aspect ratio of the rectangle to a preset ratio, display requirements of different electronic devices 10 and viewing requirements of different users can be met.

On this basis, the third display picture is obtained by projecting the third laser beam 131. The third laser beam 131 is the light diffracted or reflected by the second laser beam 121 through the optical waveguide 13. The second laser beam 121 is the effective laser beam passing through The light emitted by the lens group 12. Therefore, the specific shape of the third display screen can be controlled by the effective laser beam entering the lens group 12 .

Optionally, as shown in Figures 7a and 7b, the electronic device 10 further includes a light-shielding layer 14, the light-shielding layer 14 is arranged on the light-emitting side of the optical fiber scanning display 11, and the light-shielding layer 14 is used to shield the first laser beam 111 except the effective laser beam Beams other than laser beams.

The light shielding layer 14 can be used to shield the first laser beam 111 except for the effective laser beam to be absorbed or reflected by the light shielding layer 14 , so that it cannot be emitted from the fiber optic scanning display 11 . In this way, by adjusting the position of the light-shielding layer 14 , the part of the first laser beam 111 that belongs to the effective laser beam can be determined, and then the shape of the third display screen can be adjusted.

Wherein, since the divergence angle of the first laser beam 111 emitted from the optical fiber scanning display 11 is relatively small, the effective laser beam is basically a light with a small angle. Among the light emitted from the part of the optical fiber scanning display 11 that is not blocked by the light-shielding layer 14 and is closer to the light-shielding layer 14, the part with a certain divergence angle has a smaller divergence angle and a lower light intensity. Therefore, in the ambient light Under the interference of the ray, the third display image that the user actually sees is a rectangle with a preset aspect ratio, and other light rays can be ignored.

In some embodiments, the specific location of the light-shielding layer 14 is not limited, as long as the third display frame is a rectangle, and the aspect ratio of the rectangle satisfies a preset ratio.

Exemplarily, as shown in Figure 7a, the fiber optic scanning display 11 includes a display area and a frame area located at the periphery of the display area, and the light-shielding layer 14 can be arranged in the edge area of the display area close to the frame area; as shown in Figure 7b, the light-shielding layer 14 It can also be set in half of the complete display area.

In order to make the first laser beam 111 more applied to the display, so as to reduce the power consumption of the optical fiber scanning display 11 under the same display brightness, the light shielding layer 14 can optionally be arranged in the edge area of the display area close to the frame area, and The light-shielding layer 14 covers the display area of the fiber optic scanning display 11 as little as possible.

In the embodiment of the present application, the light-shielding layer 14 can be used to shield the first laser beam 111 except for the effective laser beam. The shape of is a rectangle, and the aspect ratio of the rectangle satisfies the preset ratio.

Optionally, as shown in FIG. 8 , the lens group 12 is arranged on the light-emitting side of the fiber optic scanning display 11 , and the range of the effective laser beam projected onto the lens group 12 is the same as the range of the light-receiving surface of the lens group 12 .

The effective laser light that can be incident in the lens group 12 in the first laser beam 111 can be adjusted by adjusting the relative positional relationship between the lens group 12 and the optical fiber scanning display 11, and the position of the light-receiving surface of the lens group 12 in the lens group 12. The range of the beam.

In the embodiment of the present application, by making the range of the effective laser beam projected on the lens group 12 the same as the range of the light receiving surface of the lens group 12, the effective laser beam is incident on the lens group 12, avoiding the first laser beam 111 Light rays other than the active laser beam enter the lens group 12 .

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims (8)

1. An electronic device, characterized in that, comprising: A fiber-optic scanning display, the fiber-optic scanning display is used to emit a first laser beam, and the first display picture projected by the first laser beam is a free-form surface; A lens group, the first laser beam enters the lens group and exits as a second laser beam, and the second display picture projected by the second laser beam is a plane; and an optical waveguide, the second laser beam enters the optical waveguide, and is adjusted to emit a third laser beam, and the third display screen projected by the third laser beam is a plane; Wherein, along the direction away from the light-receiving surface of the lens group, the lens group includes a first converging lens group, a diverging lens group, and a second converging lens group arranged in sequence; along the direction away from the light-receiving surface of the lens group direction, the first converging lens group includes a first converging lens and a second converging lens arranged in sequence, the diverging lens group includes a diverging lens, and the second converging lens group includes a third converging lens and a fourth converging lens ; The first converging lens, the second converging lens, the third converging lens, and the fourth converging lens are used for converging effective laser beams, and the diverging lens is used for diverging the effective laser beams. 2. The electronic device according to claim 1, wherein the first laser beam comprises an effective laser beam, and the effective laser beam passes through the lens group and the optical waveguide to form the third laser beam Outgoing, the shape of the third display screen projected by the third laser beam is rectangular, and the aspect ratio is a preset ratio. 3. The electronic device according to claim 2, characterized in that, the electronic device further comprises a light-shielding layer, the light-shielding layer is arranged on the light-emitting side of the optical fiber scanning display, and the light-shielding layer is used to shield the first Other laser beams in a laser beam other than the effective laser beam. 4. The electronic device according to claim 2, wherein the lens group is arranged on the light-emitting side of the optical fiber scanning display, and the range where the effective laser beam is projected onto the lens group is in contact with the lens group. The ranges of the light-receiving surfaces of the groups are the same. 5. The electronic device according to any one of claims 1-4, wherein the fiber optic scanning display comprises a fiber optic cantilever and a mechanical driving structure, and the mechanical driving structure drives the fiber optic cantilever to scan in a grid format. 6. The electronic device according to any one of claims 1-4, wherein the electronic device is AR glasses, the AR glasses body includes a frame, the optical fiber scanning display and the lens group are arranged on on the frame. 7. A method for adjusting an electronic device, comprising: The optical fiber scanning display emits a first laser beam, and the first display picture projected by the first laser beam is a free-form surface; The lens group receives the first laser beam and emits the second laser beam, and the second display screen projected by the second laser beam is a plane; The optical waveguide receives the second laser beam and emits the third laser beam, and the third display screen projected by the third laser beam is a plane; Wherein, along the direction away from the light-receiving surface of the lens group, the lens group includes a first converging lens group, a diverging lens group, and a second converging lens group arranged in sequence; along the direction away from the light-receiving surface of the lens group direction, the first converging lens group includes a first converging lens and a second converging lens arranged in sequence, the diverging lens group includes a diverging lens, and the second converging lens group includes a third converging lens and a fourth converging lens ; The first converging lens, the second converging lens, the third converging lens, and the fourth converging lens are used for converging effective laser beams, and the diverging lens is used for diverging the effective laser beams. 8. The method according to claim 7, wherein the first laser beam comprises an effective laser beam, and the effective laser beam passes through the lens group and the optical waveguide to emerge as the third laser beam , the shape of the third display screen projected by the third laser beam is a plane, and the aspect ratio is a preset ratio.

Images