CN112634754A - Optical module, uniformity adjusting method and head-mounted equipment - Google Patents
Optical module, uniformity adjusting method and head-mounted equipment Download PDFInfo
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- CN112634754A CN112634754A CN202011451693.8A CN202011451693A CN112634754A CN 112634754 A CN112634754 A CN 112634754A CN 202011451693 A CN202011451693 A CN 202011451693A CN 112634754 A CN112634754 A CN 112634754A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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Abstract
The embodiment of the application provides an optical module, including fixed subassembly, flexible display screen, lens subassembly and drive assembly, the edge assembly of flexible display screen is in fixed subassembly, and flexible display screen has display surface and installation face, and the central zone of installation face is provided with the contact area. The lens assembly comprises a lens, the lens assembly is arranged on one side of the display surface, which is far away from the mounting surface, and is positioned on a light path of the emergent light beam of the display surface, and the projection of the optical axis of the lens assembly on the mounting surface is positioned in the contact area. The driving assembly is used for changing the curvature of the flexible display screen. Through fixing the edge part of the flexible display screen, acting force is applied to the contact area of the installation surface of the display screen by the driving assembly, so that the flexible display screen can be bent from the center of the flexible display screen, the curvature of the flexible display screen is further changed, the direction of a light beam emitted from the flexible display screen is changed, and the imaging uniformity of the flexible display screen is better. In addition, the embodiment of the application also provides a head-mounted device and an adjusting method.
Description
Technical Field
The application relates to the field of consumer electronics, in particular to an optical module, a uniformity adjusting method and a head-mounted device.
Background
Present head-mounted equipment is through an optical module projection formation of image in front of user's eyes, and the user can watch the formation of image of optical module to partial head-mounted equipment in addition can also see through ambient light, and the user can also see external environment when watching the formation of image of optical module, or partial head-mounted equipment can also show optical module's formation of image and ambient light mix together. The display device used by the optical module is mostly of a planar structure, and when the display device displays, light beams emitted by the display device are not in a single direction but are scattered all around, so that the projected image of the display device has the defect of nonuniformity.
Disclosure of Invention
The application aims to provide an optical module, an adjusting method thereof and a head-mounted device, so that the uniformity of projection imaging of the optical module is better.
In a first aspect, an embodiment of the present application provides an optical module, which includes a fixing component, a flexible display screen, a lens component, and a driving component, wherein an edge of the flexible display screen is fixed to the fixing component. The lens assembly is positioned on the light path of the emergent light beam of the display surface, and the projection of the optical axis of the lens assembly on the mounting surface is positioned in the central area of the flexible display screen. The drive assembly is adapted to apply a force to the central area to change the curvature of the flexible display.
In a second aspect, an embodiment of the present application further provides a head-mounted device, including a main body portion, a display lens and the above optical module, where the display lens is disposed on the main body portion, and a light beam emitted by the optical module forms an image on the display lens.
In a third aspect, an embodiment of the present application further provides a uniformity adjustment method, which is applied to the optical module or the head-mounted device, and the method includes:
acquiring a uniformity value of a light beam incident on the lens assembly; determining whether the uniformity value is greater than or equal to a uniformity threshold; if the uniformity value is greater than or equal to the uniformity threshold, applying a force to the contact area of the mounting surface of the flexible display to change the curvature of the flexible display until the uniformity value is greater than or equal to the uniformity threshold.
The optical module that this application embodiment provided, edge portion through with flexible display screen is fixed, is applyed the effort by drive assembly to the central zone of the installation face of display screen for flexible display screen can be crooked from flexible display screen's center, and then changes its camber, changes from the orientation of the light beam of flexible display screen outgoing like this, makes the homogeneity of its formation of image better. In addition, homogeneity adjusting method can make optical module adjust the camber of flexible display screen before leaving the factory or in the use, can have better homogeneity when projection imaging up to the emergent beam of flexible display screen, and simultaneously, wear-type equipment can realize better demonstration viewing effect through using foretell optical module.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an optical path diagram of an optical module according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an optical module according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of an installation structure of a flexible display screen in an optical module according to an embodiment of the present application.
Fig. 4 is an enlarged view of the point iv in fig. 2.
Fig. 5 is a schematic structural diagram of another optical module according to an embodiment of the present disclosure.
Fig. 6 is a schematic structural diagram of another optical module according to an embodiment of the present disclosure.
Fig. 7 is a schematic structural diagram of another optical module according to an embodiment of the present disclosure.
Fig. 8 is a schematic optical path diagram of an optical module according to an embodiment of the present disclosure in one state.
Fig. 9 is a schematic optical path diagram of an optical module according to an embodiment of the present disclosure in one state.
Fig. 10 is a schematic structural diagram of a head-mounted device according to an embodiment of the present application.
Fig. 11 is a schematic optical path diagram of a head-mounted device according to an embodiment of the present application.
Fig. 12 is a flowchart of a uniformity adjustment method provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Virtual Reality (VR) is a computer simulation system that creates and experiences a Virtual world, using a computer to create a simulated environment into which a user is immersed. The virtual reality technology is to combine electronic signals generated by computer technology with data in real life to convert the electronic signals into phenomena which can be felt by people, wherein the phenomena can be true and true objects in reality or substances which can not be seen by the naked eyes, and the phenomena are expressed by a three-dimensional model.
Augmented Reality (AR) technology is a technology for superimposing virtual display contents in a real scene by skillfully fusing virtual information and a real world. It generates virtual information such as visual image, sound, etc. by computer technology; the virtual information is then applied to the real world. The virtual reality technology not only shows the information of the real world, but also can simultaneously display the virtual information, and the two kinds of information are mutually supplemented and superposed.
Mixed Reality (MR) builds an interactive feedback information loop among the virtual world, the real world and the user by introducing real scene information into the virtual environment, so as to enhance the sense of Reality of the user experience.
The existing partial head-mounted device can realize VR, AR or MR display, and such head-mounted device usually has an optical module for projecting a display beam onto a display lens, wherein the optical module usually includes a display device and a lens assembly, and the light beam emitted from the display device is emitted onto the display lens through the lens assembly for the user to watch.
In the prior art, as shown in fig. 1, since the display device 1 is directly opposite to the lens assembly 2, and the display device 1 is mostly of a planar structure, when a light beam emitted from the display device 1 passes through the lens assembly 2, since the light beam is not emitted completely perpendicular to the lens assembly 2, there is a scattering situation, a part of the light beam emitted from an edge area of the display device 1 escapes, and a majority of the light beam emitted from a central area of the display device 1 is projected onto the lens assembly 2, so that a light spot on the lens assembly 2 appears to be stronger in the central area and weaker in the edge area. When the light beam is projected on the display lens, the image observed by the user also has a light and shade gradient, which affects the appearance.
Also, as the display lenses of various different types of head mounted devices may be configured in different configurations, such differences in configuration may further exacerbate differences in uniformity of projected imaging.
Therefore, the inventor proposes an optical module, a uniformity adjusting method, and a head-mounted device in the embodiments of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 2 and fig. 3 together, an optical module 100 according to an embodiment of the present disclosure includes a fixing component 110, a flexible display 120, a lens component 140 and a driving component 130, wherein the fixing component 110 is used for bearing and mounting the flexible display 120, and the lens component 140 is located on an optical path of a light beam emitted from the flexible display 120 and is used for guiding the light beam emitted from the flexible display 120. The driving assembly 130 is used to support the flexible display 120 and provide a force to the flexible display 120, so that the flexible display 120 is deformed, thereby changing the curvature of the flexible display 120.
Referring to fig. 3, the fixing element 110 is used for fixing and mounting an edge of the flexible display screen 120, and in this embodiment, as an example only, the fixing element 110 includes a first frame 111, a second frame 112, a third frame 113 and a fourth frame 114, wherein the first frame 111 and the second frame 112 are disposed opposite to each other, and the third frame 113 and the fourth frame 114 are disposed opposite to each other and connected between the first frame 111 and the second frame 112. The first frame 111, the second frame 112, the third frame 113 and the fourth frame 114 enclose an installation space for accommodating the flexible display screen 120. Specifically, the edges of the flexible display screen 120 are respectively fixed to the first frame 111, the second frame 112, the third frame 113, and the fourth frame 114, and are fixed relative to the fixing component 110.
In this embodiment, referring to fig. 2 and fig. 4, the first frame 111, the second frame 112, the third frame 113, and the fourth frame 114 are all provided with a step surface, and the step surface is provided with a foam 160, and the edge of the flexible display screen 120 is disposed on the foam 160 of the step surface to form an assembly. For example, the foam 160 may be fixed to the step surface by bonding, and the edge of the flexible display 120 may be fixed to the foam 160 by bonding. Because the foam 160 has a certain deformation capability, when the flexible display screen 120 deforms, the foam 160 can have a certain flexibility, and the flexible display screen 120 is prevented from being damaged due to stretching.
In other embodiments, the fixing assembly 110 may include only the first frame 111 and the second frame 112, or only the third frame 113 and the fourth frame 114. Any one or more of the first frame 111, the second frame 112, the third frame 113, and the fourth frame 114 may further have a hole, a groove, and the like, which is not limited herein.
With reference to fig. 2 and fig. 3, the flexible display 120 has a display surface 121 and a mounting surface 122 facing away from each other, where the display surface 121 refers to a surface of the flexible display 120 for displaying images or emitting light, the display surface 121 is disposed toward the lens assembly 140, the mounting surface 122 faces the foam 160 on the fixing assembly 110, and an edge of the mounting surface 122 is bonded and fixed to the foam 160.
The center region 123 of the mounting surface 122 includes the center of the mounting surface 122, i.e., the center of the mounting surface 122 is located within the center region 123. it is understood that the center region 123 is a region that encompasses the center of the mounting surface 122, and the center region 123 is not adjacent to the edge of the flexible display 120. As just one example, the central region 123 may be a region centered on the center of the mounting surface 122 with a distance from an outer edge of the central region 123 to the center that is less than or equal to R, where R is less than the distance from the center to the edge of the flexible display screen 120. Wherein the center of the mounting surface 122 of the flexible display 120 refers to the geometric center of the mounting surface 122.
The edge of the flexible display 120 is assembled to the fixing component 110, that is, the edge of the flexible display 120 is fixed by the fixing component 110, it is understood that the fixing component 110 may be assembled to fix the whole edge of the flexible display 120 or only fix a part of the edge of the flexible display 120.
The lens assembly 140 may include one or more lenses, which may be one or more of concave, convex, reflective, prismatic, and may be arranged in various combinations. In addition, the lens assembly 140 may further include various optical elements such as a light homogenizer, a polarizer, a light pipe, and the like, which is not limited herein. The lens assembly 140 is used to direct the light beam exiting the flexible display 120. The lens assembly 140 is disposed on a side of the display surface 121 far from the mounting surface 122, and is located on an optical path of the light beam emitted from the display surface 121, and a projection of an optical axis of the lens assembly 140 on the mounting surface 122 is located in the central area 123. The optical axis of the lens assembly 140 refers to: the focal center line of the lens in lens assembly 140.
Referring to fig. 2, the lens assembly 140 is opposite to the display surface 121 of the flexible display 120, and when the flexible display 120 is lighted, an emergent light beam is incident on the lens assembly 140. And the cross-sectional area of the lens assembly 140 may be slightly larger than the display surface 121 of the display screen, so that the spot formed by the outgoing light beam incident on the lens assembly 140 is always located in the lens assembly 140.
The driving assembly 130 is used to apply a force to the central area 123 to change the curvature of the flexible display 120. Specifically, when the driving assembly 130 is driven by external power, the force applied to the central area 123 by the driving assembly 130 may cause the flexible display 120 to deform, warp, etc. from the central area 123, so that the curvature of the flexible display 120 changes. The area of contact of the driving assembly 130 with the central region 123 may completely cover the central region 123 to increase the contact area and avoid puncturing the flexible display 120. The driving assembly 130 may be connected to the mounting surface 122 of the flexible display 120 by bonding or the like, and the acting force applied by the driving assembly 130 to the flexible display 120 may be to make the middle region of the flexible display 120 convex or to make the middle region of the flexible display 120 concave. The driving assembly 130 may be made of a flexible material, such as flexible plastic, flexible metal, etc.
As an example, in the present embodiment, referring to fig. 3, the driving assembly 130 is configured to have a substantially rectangular structure, and each edge of the rectangular driving assembly 130 is disposed in parallel with the first frame 111, the second frame 112, the third frame 113, and the fourth frame 114 of the fixing assembly 110, i.e., each edge of the rectangular driving assembly 130 is disposed in parallel with the edge of the flexible display 120. This arrangement is advantageous in that when the driving assembly 130 applies a force to the flexible display 120, the entire driving assembly 130 applies a force to the flexible display 120 in the central region 123 of the mounting surface 122; moreover, each edge of the driving assembly 130 is parallel to the four frames of the fixing assembly 110, the acting force of the driving assembly 130 on the flexible display screen 120 is balanced in all directions, and the change of the curvature of the flexible display screen 120 is uniform from the center of the flexible display screen 120 to the edge direction in the process of bending and changing the curvature, and the change rate of the curvature in all directions is the same, so that the flexible display screen 120 is prevented from being damaged due to severe bending, and meanwhile, the deflection amount of the emergent light beam of the flexible display screen 120 is uniform due to the uniformly changed curvature, so that the uniformity of the light spot incident to the lens assembly 140 is easier to control. Of course, the drive assembly 130 may be configured in other shape configurations as well, such as circular, elliptical, and the like.
In one embodiment, the drive assembly 130 may also be configured as follows: after the flexible display screen 120 is set, when the driving assembly 130 applies an acting force to the flexible display screen 120, the flexible display screen 120 deforms, the contact area between the driving assembly 130 and the mounting surface 122 of the flexible display screen 120 is always large, the flexible display screen 120 can be better protected, and particularly, the flexible display screen 120 can be prevented from being punctured at the central position of the driving assembly 130.
In the present embodiment, the center of the central area 123 is located on the optical axis of the lens assembly 140, that is, the optical axis of the lens assembly 140 passes through the center of the central area 123, and the center of the driving assembly 130 corresponds to the center of the central area 123, so that the purpose of this is: when the driving assembly 130 provides a force to make the flexible display 120 change curvature, the center of the driving assembly 130 can make the flexible display 120 bend around the optical axis of the lens assembly 140, so that the light intensity/chromaticity and the like of a light spot formed by an emergent light beam of the flexible display 120 at a position corresponding to the optical axis of the lens assembly 140 can be weakened, while the light intensity/chromaticity and the like of the edge part of the light spot can be enhanced, and the formed imaging effect is better.
Further, when the driving assembly 130 applies a force, the driving assembly 130 may apply a force to the central area 123, which is always perpendicular to the outer tangent plane of the center of the central area 123, so that in the process of deforming the flexible display 120 and changing the curvature, the force component formed in the circumferential direction of the center of the flexible display 120 is equivalent, that is, it may be ensured that the change of the curvature in the circumferential direction of the center of the flexible display 120 is the same, and therefore, the uniformity of the light spot is better improved. Illustratively, in order to prevent the flexible display 120 from bending too much and affecting its lifetime, the curvature of the flexible display 120 is not too large, and may be, for example, less than or equal to 4 mm.
In some embodiments, the driving assembly 130 may be moved by an external force, so that the driving assembly 130 reaches a predetermined position (for example, at the time of factory shipment, driven by a motor on the production equipment), and the flexible display 120 maintains a fixed curvature, and after the flexible display 120 maintains the fixed curvature, the driving assembly 130 is fixed on the fixing assembly 110 by other components, so that the driving assembly 130 can maintain the curvature of the flexible display 120. For example, when the position of the driving element 130 is fixed, the outer frame 161 can be fixed to the fixing element 110 by being supported by the outer frame 161, so as to maintain the position of the driving element 130.
In one embodiment, referring to fig. 5, the optical module 100 may further include a driving device 150, and the driving device 150 is connected to the driving element 130 and is configured to drive the driving element 130, so that the driving element 130 applies a force to the central area 123. And the driving device 150 may enable the driving assembly 130 to maintain the current position when the driving force is not provided, thereby fixing the curvature of the flexible display 120.
In one embodiment, as shown in FIG. 5: the driving device 150 includes a driving motor 151 and a screw 152, an output shaft of the driving motor 151 is in transmission connection with the screw 152, and the driving assembly 130 is assembled to the screw 152 in a threaded manner and is slidably disposed along an extending direction of the screw 152. The driving motor 151 drives the screw 152 to rotate, and during the rotation of the screw 152, the driving assembly 130 slides along the extending direction of the screw 152, and because the stroke of the driving assembly 130 is not set too long, during the assembly, the driving assembly 130 can be assembled at the end position of the screw 152 far away from the driving motor 151, as long as it is ensured that the driving assembly 130 does not fall out of the screw 152. During assembly, the driving motor 151 is fixedly arranged, and the holding position is fixed, when the driving motor 151 drives the screw 152 to rotate, the driving assembly 130 slides and finally reaches the predetermined position, and after the driving assembly 130 reaches the predetermined position, the driving motor 151 stops, and the position of the driving assembly 130 can be fixed, at this time, the driving assembly 130 can be fixed without arranging the mounting bracket 161, so that the flexible display screen 120 keeps a fixed bending state, namely, keeps the curvature thereof.
In one embodiment, as shown in fig. 6, in order to better protect the flexible display screen 120, the optical module 100 may further include a flexible support layer 170, the flexible support layer 170 is disposed on the mounting surface 122, and the driving assembly 130 is configured to apply a force to the flexible support layer 170. Wherein the flexible support layer 170 may be disposed only in the central region 123 or may completely cover the mounting surface 122. The flexible supporting layer 170 may be made of a material having a certain deformation characteristic, such as silicone rubber or foam. The drive assembly 130 may then be bonded directly to the flexible support layer 170.
In one embodiment, as shown in FIG. 7: the driving device 150 includes a driving motor 151 and a rack 153, an output shaft of the driving motor 151 is engaged with the rack 153, the rack 153 is slidably disposed, and the driving assembly 130 is connected to the rack 153. That is, the driving motor 151 drives the rack 153 to move during the rotation process, and further drives the driving assembly 130 to move. Similarly, the combination of the driving motor 151 and the rack gear 153 may fix the position of the driving assembly 130. During assembly, the drive motor 151 remains stationary and the drive assembly 130 may be coupled to the end of the rack 153. Since the driving motor 151 and the axial direction and the extending direction of the rack gear 153 may be perpendicular to each other, it is advantageous to arrange in a narrow space.
The above-mentioned arrangement of the driving device 150 is only exemplary, and in some other embodiments, the driving device 150 may also be a micro cylinder, and the like, which is not limited herein.
The driving device 150 may be controlled to be configured by a user during use in adjusting the curvature of the flexible display 120. In the process of manufacturing the optical module 100, for the same batch of products, the control device may be configured to obtain the pre-stored predetermined curvature information of the flexible display 120, and further provide the driving force with the predetermined magnitude for the driving assembly 130, so that the driving assembly 130 drives the flexible display 120 to change to the predetermined curvature. The pre-stored predetermined curvature information of the flexible display 120 refers to: the pre-stored curvature that the flexible display 120 needs to achieve can be determined based on the characteristics of the lens assembly 140. When the predetermined curvature information is determined, it can be stored in a memory in the manufacturing apparatus or a memory of the optical module 100 itself, and the driving apparatus 150 reads the information to provide a driving force of a predetermined magnitude, so that the flexible display 120 maintains the predetermined curvature.
When the driving assembly 130 makes the flexible display 120 protrude upward (protrude toward the lens assembly 140), as shown in fig. 8, when the flexible display 120 is lighted, the emergent light beam of the display surface 121 of the flexible display 120 will deflect toward the edge of the flexible display 120, so the light intensity of the central area of the light spot on the lens assembly 140 will be reduced, and the light intensity of the edge area of the light spot will be increased due to the incident scattered light, so that the light intensity of the edge area can be compensated, and the uniformity of the light spot on the lens assembly 140 is better. Thus, the image projected through the lens assembly 140 may be more uniform when viewed by a user.
When the driving assembly 130 makes the flexible display 120 concave (concave towards the direction away from the lens assembly 140), as shown in fig. 9, when the flexible display 120 is lighted, the emergent light beam of the display surface 121 of the flexible display 120 will be deflected towards the edge of the flexible display 120, so the light intensity of the central area of the light spot on the lens assembly 140 will be reduced, and the light intensity of the edge area of the light spot will be increased due to the scattered light incidence, so the light intensity of the edge area can be compensated, and the uniformity of the light spot on the lens assembly 140 can be better. Thus, the image projected through the lens assembly 140 may be more uniform when viewed by a user.
In the optical module 100 provided by this embodiment, the driving assembly 130 for changing the curvature of the flexible display screen 120 is disposed, so that the curvature of the flexible display screen 120 can be changed, and the uniformity of the light spot formed by the emergent light beam of the flexible display screen 120 is further adjusted. When a user watches the glasses, the uniformity of imaging is better, the eyesight is protected, and meanwhile, better use experience is achieved.
Referring to fig. 10, the embodiment further provides a head-mounted device 10, which includes a main body 200, a display lens 300, an optical module 100, and an optional wearing portion 400, wherein the main body 200 is used for carrying and mounting the display lens 300, the wearing portion 400 is connected to the main body 200 for being worn by a user, and the optical module 100 may be disposed on the main body 200 or the wearing portion 400.
In the present embodiment, the smart glasses are taken as an example, the main body 200 is configured in a frame form and can be used to mount the display lens 300, and the corresponding wearing portion 400 is configured in a frame form and is worn by the user.
Referring to fig. 10 and 11, the display lens 300 may be one or a plurality of, and in this embodiment, the display lens 300 includes a first surface 310 and a second surface 320 which are away from each other, wherein when worn, the first surface 310 is close to the eyes of the user, and the second surface 320 is far away from the eyes of the user. The display lens 300 is made of a transparent material, so that the ambient light can transmit through the first surface 310 and the second surface 320, and thus, the user's eyes can receive the external ambient light through the display lens 300, and the ambient light can enter the user's eyes simultaneously with the light projected by the flexible display screen 120, thereby forming an augmented reality display.
In this embodiment, the optical modules 100 are disposed on the wearing portion 400, and there are two optical modules 100, the two optical modules 100 are disposed on the two mirror frames respectively, and emit light beams towards the display lens 300 correspondingly, specifically, the light beams emitted from the optical modules 100 are incident on the first surface 310 and can be imaged on the first surface 310. In some embodiments, the light beam emitted by the optical module 100 may be reflected by the first surface 310 toward the user to receive an image of the user's eye. At this time, the outgoing light beam of the optical module 100 may adopt light with a specific wavelength, such as blue light, and the display lens 300 may be configured to reflect the light with the specific wavelength, as an example, the first surface 310 of the display lens 300 may reflect the blue light and may transmit light with other colors, when the outgoing light beam of the optical module 100 is incident on the first surface 310, the outgoing light beam is reflected by the first surface 310, and light in the environment other than the blue light is transmitted through the second surface 320 and the first surface 310, so that the user may receive the outgoing light beam of the optical module 100 and the ambient light at the same time, thereby achieving a virtual reality superposition effect. Of course, it is understood that the light beam emitted from the optical module 100 may be red light, green light, or other light.
The outgoing light beam of the optical module 100 may also adopt light of a specific polarization state, such as P-polarized light or S-polarized light, and the display lens 300 may be configured to reflect light of a specific polarization state (such as P-polarized light or S-polarized light), as an example, the first surface 310 of the display lens 300 may reflect P-polarized light and may transmit light of other polarization states, when the outgoing light beam of the optical module 100 is incident on the first surface 310, the outgoing light beam is reflected by the first surface 310, and light other than P-polarized light in the environment transmits the second surface 320 and the first surface 310, so that the user may receive the outgoing light beam of the optical module 100 and the ambient light at the same time, thereby achieving a virtual reality superposition effect. Of course, it is understood that the outgoing beam of the optical module 100 may also be S-polarized light.
In the optical module 100, the emergent light beam of the flexible display 120 passes through the lens assembly 140 and is incident on the first surface 310 of the display lens 300, either directly incident on the first surface 310 or incident on the first surface 310 after being refracted or reflected one or more times. In this embodiment, the main body is provided with a coupling grating 330 and a coupling grating 340, an outgoing light beam of the optical module 100 firstly enters the coupling grating 330, forms a waveguide structure in the display lens 300, and finally exits to the first surface 310 through the coupling grating 340, and is received by eyes of a user after passing through the first surface 310.
In this process, since the display lenses 300 can be configured in various shapes, when the light beam emitted from the optical module 100 enters the first surface 310, the uniformity of the light spots formed on the first surfaces 310 of different display lenses 300 by the same optical module 100 will be different, and at this time, the flexible display screen 120 in the optical module 100 can be controlled to change the curvature for adjustment, so that the uniformity of the image viewed by the user is better. Therefore, the head-mounted device 10 provided by the present embodiment can provide a more uniform visual effect, which is beneficial to protect eyesight and improve user experience.
In other embodiments, the second surface 320 of the display lens 300 can reflect ambient light, and the user can only view the light projected by the flexible display screen 120 to realize a virtual reality display.
It is to be understood that the head-mounted device 10 shown in the present embodiment is only an example, and the head-mounted device 10 in the present application may also be other AR devices, VR devices, MR devices, or the like, and is not limited herein. And the head-mounted device 10 may be configured in any other configuration including, but not limited to, smart glasses, as well as smart helmets, smart accessories, and the like.
Referring to fig. 12, the present embodiment further provides a uniformity adjusting method, which can be applied to the optical module 100 or the head-mounted device 10, including:
step S110: a uniformity value of the light beam incident on the lens assembly 140 is acquired.
The uniformity value is used to characterize the uniformity of the spot formed by the beam incident on the lens assembly 140. The uniformity value of the light beam incident on the lens assembly 140 can be obtained as follows: the flexible display screen 120 is lighted up, so that the emergent light beam of the flexible display screen 120 is incident on the lens assembly 140, and the difference value of the light brightness and/or the difference value of the chromaticity of the light beam received by the lens assembly 140 is obtained as the uniformity value. The difference value of the luminance brightness may be a difference value between the luminance brightness of the point with the maximum luminance brightness and the luminance brightness of the point with the minimum luminance brightness, and the difference value of the chromaticity may be a difference value between the chromaticity of the point with the maximum chromaticity and the chromaticity of the point with the minimum chromaticity.
When applied to the head-mounted device 10, the step S110 may also be: the uniformity value of the light beam incident on the display lens 300 is acquired.
Step S120: it is determined whether the uniformity value is greater than or equal to a uniformity threshold.
The uniformity threshold may be predetermined, for example, the uniformity threshold may be a difference value of lightness of 0.0001 to 1(lx) or less, a difference value of chroma of 0.0001 to 1 degree, or the like. When it is determined in step S120 that the uniformity value is greater than or equal to the uniformity threshold, step S130 is performed.
Step S130: a force is applied to a central region 123 of the mounting face 122 of the flexible display 120 to change the curvature of the flexible display 120 until the uniformity value is greater than or equal to the uniformity threshold.
Specifically, step S130 may be performed as follows: the driving device 150 arranged in the optical module 100 or the external driving device 150 presses the driving assembly 130, so as to provide an acting force to the central area 123 of the mounting surface 122, so that the flexible display screen 120 deforms and changes curvature, and in the process of changing the curvature of the flexible display screen 120, the uniformity value of the light beam incident on the lens assembly 140 changes accordingly, the uniformity value of the light beam incident on the lens assembly 140 is obtained in real time, and the driving device 150 is stopped until the uniformity value is greater than or equal to the uniformity threshold value, and the position of the driving assembly 130 is fixed, i.e. the curvature of the flexible display screen 120 is fixed.
In some other embodiments, the step S130 may also be adjusted by a setting system, the setting system may include a uniformity value collecting device, a control device, the control device is electrically connected to the uniformity value collecting device and the driving device 150, the uniformity value collecting device collects the uniformity value of the light beam incident on the lens component 140 in real time and feeds back the collected result to the control device, and the control device controls the driving device 150 to deform the flexible display 120 according to the received uniformity value of the light beam incident on the lens component 140, so as to change the uniformity value of the light beam incident on the lens component 140, thereby forming the adjustment of the real-time feedback.
The adjusting method of the optical module 100 provided in this embodiment can adjust the uniformity of the optical module 100 in real time, so that the optical module 100 has better visual effect and effectively protects eyesight.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. An optical module, comprising:
a fixing assembly;
the edge of the flexible display screen is fixed on the fixing component;
the lens assembly is positioned on a light path of the emergent light beam of the display surface, and the projection of the optical axis of the lens assembly on the flexible display screen is positioned in the central area of the flexible display screen;
a drive assembly for applying a force to the central region to change the curvature of the flexible display screen.
2. The optical module of claim 1, wherein the flexible display screen is centered on an optical axis of the lens assembly.
3. The optical module of claim 2, wherein the driving assembly is configured to apply a force to the flexible display panel that is always perpendicular to an outer tangent plane of the center of the central region.
4. The optical module of claim 1 further comprising a flexible support layer disposed on the mounting surface, wherein the actuator assembly is configured to apply a force to the flexible support layer.
5. The optical module of claim 1 further comprising a drive device coupled to the drive assembly and configured to drive the drive assembly such that the drive assembly applies a force to the contact region.
6. The optical module according to claim 5, wherein the driving device is further configured to obtain pre-stored predetermined curvature information of the flexible display screen, and provide a driving force of a predetermined magnitude to the driving assembly, so that the driving assembly drives the flexible display screen to change to the predetermined curvature.
7. The optical module according to claim 5, wherein the driving device comprises a driving motor and a screw, an output shaft of the driving motor is in transmission connection with the screw, and the driving component is threadedly assembled on the screw and slidably disposed along an extending direction of the screw.
8. The optical module of claim 5, wherein the driving device comprises a driving motor and a rack, an output shaft of the driving motor is engaged with the rack, the rack is slidably disposed, and the driving assembly is connected to the rack.
9. A head-mounted device, comprising:
a main body portion;
a display lens disposed on the main body portion, an
The optical module of any one of claims 1-8 wherein the light beam exiting the optical module is imaged on the display optic.
10. The head-mounted apparatus according to claim 9, further comprising a wearing portion, wherein the optical module is disposed in the wearing portion.
11. A uniformity adjustment method applied to an optical module according to claims 1 to 8 or a head-mounted device according to claim 9 or 10, the method comprising:
acquiring a uniformity value of a light beam incident on the lens component and/or the display lens;
determining whether the uniformity value is greater than or equal to a uniformity threshold;
if the uniformity value is greater than or equal to the uniformity threshold, applying a force to a contact area of a mounting surface of a flexible display screen to change the curvature of the flexible display screen until the uniformity value is greater than or equal to the uniformity threshold.
12. The method according to claim 11, wherein the uniformity value comprises a difference value of luminance and/or a difference value of chrominance of the light beam received by the lens assembly or the display lens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011451693.8A CN112634754A (en) | 2020-12-09 | 2020-12-09 | Optical module, uniformity adjusting method and head-mounted equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011451693.8A CN112634754A (en) | 2020-12-09 | 2020-12-09 | Optical module, uniformity adjusting method and head-mounted equipment |
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| CN112634754A true CN112634754A (en) | 2021-04-09 |
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| CN202011451693.8A Pending CN112634754A (en) | 2020-12-09 | 2020-12-09 | Optical module, uniformity adjusting method and head-mounted equipment |
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