KR20230128900A - Optical member and wearavle device comprising the same - Google Patents

Abstract

An optical member according to an embodiment includes a housing; and a lens module disposed within the housing. a reflective member that reflects light emitted from the lens module; and an emission member through which light reflected from the reflection member is emitted, and when a first vertical vector of the reflection member is defined and a second vertical vector of the emission member is defined, the degree of inclination of the reflection member is It is defined as an angle formed by the first vertical vector and the second vertical vector, and the angle between the first vertical vector and the second vertical vector is 10° to 30°.

Description

Optical member and wearable device including the same {OPTICAL MEMBER AND WEARAVLE DEVICE COMPRISING THE SAME}

The embodiment relates to an optical member and a wearable device including the optical member.

With the recent development of technology, various types of wearable devices that can be worn on the body have emerged. Among them, an augmented reality (AR) device is a wearable device in the form of glasses worn on a user's head, and can provide augmented reality services to users by providing visual information through a display.

Augmented Reality means mixing real world information and virtual images by inserting a three-dimensional image into a real environment.

Real-world information includes information that the wearer does not need, and sometimes the information that the wearer needs may be lacking. However, the augmented reality system combines the real world and the virtual world so that the wearer can interact with the real world and necessary information in real time.

These augmented reality (AR) devices can see ahead even during use, unlike virtual reality (VR) devices that block the view. In addition, it is possible to display a wide screen screen level in front of the eyes or use various AR contents while wearing it like regular glasses. In addition, it can support an extended reality experience that combines reality and AR content by utilizing all 360-degree spaces centered on users. In addition, it is developing into a technology that replaces smartphones in that it provides a display optimized for the user's point of view while both hands are free.

The augmented reality device includes an optical module to provide augmented reality images to wearers.

Such an optical module includes a light source and various optical components that control movement of light emitted from the light source. The light emitted from the light source is condensed, reflected, and scanned through various optical components and moved to glass disposed outside the optical module.

At this time, the image quality, weight, and driving voltage of the augmented reality device including the optical module may vary depending on the arrangement and size of the optical parts disposed inside the optical module. Accordingly, there is a need for an optical member having a novel structure capable of realizing optimal image quality, driving voltage, and weight, and a wearable device including the optical member.

On the other hand, using such a scanning projector is disclosed in Korean Patent Publication KR10-2017-0085875 (2027.07.25).

Embodiments are intended to provide an optical member capable of realizing improved optical efficiency with improved reliability and a wearable device including the same.

An optical member according to an embodiment includes a housing; and a lens module disposed within the housing. a reflective member that reflects light emitted from the lens module; and an emission member through which light reflected from the reflection member is emitted, and when a first vertical vector of the reflection member is defined and a second vertical vector of the emission member is defined, the degree of inclination of the reflection member is It is defined as an angle formed by the first vertical vector and the second vertical vector, and the angle between the first vertical vector and the second vertical vector is 10° to 30°.

In the optical member according to the embodiment, the sum of light incident to the reflective member and outgoing light reflected from the reflective member is 90° to 120°.

In the optical member according to the embodiment, when the second vertical vector of the emitting member and the optical axis of the lens module are defined, the degree of inclination of the lens module is such that the extension line of the second vertical vector and the extension line of the optical axis are It is defined as an angle forming, and the angle between the second vertical vector and the optical axis is 50° to 70°.

In the optical member according to the embodiment, an angle between an optical axis of the lens module and a first vertical vector of the reflective member is 40° to 60°.

In the optical member according to the embodiment, the distance between the reflective member and the lens module is 0.7 mm to 1.1 mm.

In the optical member according to the embodiment, the distance between the reflective member and the housing is 0.9 mm to 1.3 mm.

The optical member according to the embodiment may prevent the second reflective member from colliding with the housing inside the housing by adjusting the inclination and spacing of the reflective member within a set range. Accordingly, it is possible to prevent the second reflective member from contacting the housing inside the housing even by an external impact.

The optical member according to the embodiment may reduce an amount of light that is not incident to the reflective member when light emitted from the lens module is incident to the reflective member by adjusting the inclination of the reflective member and the lens module within a set range. Accordingly, the optical member according to the embodiment may have improved optical efficiency while reducing light loss.

1 is a perspective view of an optical member according to an embodiment.
2 is an exploded perspective view of an optical member according to an embodiment.
3 is a perspective view of an optical module according to an embodiment.
4 is a cross-sectional view of an optical module according to an embodiment.
5 is a diagram illustrating a display device to which an optical member according to an embodiment is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in a variety of different forms, and if it is within the scope of the technical idea of the present invention, one or more of the components among the embodiments can be selectively implemented. can be used by combining and substituting. In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly specifically defined and described, can be generally understood by those of ordinary skill in the art to which the present invention belongs. It can be interpreted as meaning, and commonly used terms, such as terms defined in a dictionary, can be interpreted in consideration of contextual meanings of related technologies. Also, terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and in the case of “at least one (or more than one) of A and (and) B and C”, A, B, and C are combined. may include one or more of all possible combinations. Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the term is not limited to the nature, order, or order of the corresponding component. And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected to, combined with, or connected to the other component, but also with the component. It may also include the case of being 'connected', 'combined', or 'connected' due to another component between the other components.

In addition, when it is described as being formed or disposed on the "top (above) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is not only when two components are in direct contact with each other, but also It also includes cases where one or more other components are formed or disposed between two components. In addition, when expressed as “up (up) or down (down)”, it may include the meaning of not only the upward direction but also the downward direction based on one component.

Hereinafter, an optical member according to an embodiment will be described with reference to FIGS. 1 to 4 . An optical member according to an embodiment described below may be an optical member of a 3D display. An optical member according to an embodiment described below may be applied to a display device. In detail, an optical member according to an embodiment may be applied to a wearable display device. For example, the optical member according to the embodiment may be applied to an augmented reality (AR) device.

Referring to FIGS. 1 and 2 , an optical member 10 according to an embodiment may include a first housing 1100 , a second housing 1200 and an optical module 2000 . The first housing 1100 and the second housing 1200 may each accommodate the optical module 2000 .

In detail, the first housing 1100 may accommodate the side of the optical module 2000 . That is, the first housing 1100 may be disposed surrounding the side surface of the optical module 2000 .

Also, the second housing 1200 may accommodate the optical module 2000 . That is, the second housing 1200 may accommodate the optical module 2000 whose sides are accommodated by the first housing 1100 . That is, the side of the optical module 2000 may be accommodated by the first housing 1100, and the second housing 1200 may be disposed surrounding the front surface of the optical module. That is, the first housing 1100 and the optical module 2000 may be accommodated by the second housing 1200 .

The second housing 1200 may include an opening OA. The optical module 2000 may be partially exposed by the opening 1200 of the second housing 1200 . That is, the emission member 500 of the optical module 2000 may be coupled to the opening OA. Accordingly, the light moving in the optical module 2000 may move to the outside of the optical member 10 through the emitting member.

3 is a perspective view of an optical module 2000 of an optical member according to an embodiment.

Referring to FIG. 3 , the optical module 2000 may include a light source member 100, a lens module 200, a reflective member 400, an emission member 500, and a plurality of circuit members 610 and 620. there is.

The circuit member may include a circuit board 610 and a driving member 620 disposed on the circuit board 610 . The circuit board 610 may include at least one printed circuit board of FPCB and PCB. The circuit board 610 may support at least one member among the light source member 100 , the lens module 200 , and the reflective member 400 or may be connected to at least one member.

In addition, the driving member 620 may include various driving parts such as a driving driver.

The light source member 100, the lens module 200, the reflective member 400 and the emitting member 500, and the plurality of circuit members 610 and 620 are the first housing 1100 and the above-described first housing 1100. It may be accommodated in the second housing 1200 .

Light generated from the light source member 100 may sequentially move toward the lens module 200 , the reflective member 400 , and the emission member 500 . That is, the light generated from the light source member 100 may move while being reflected, transmitted, and refracted in the lens module 200 , the reflection member 400 , and the emission member 500 .

The light source member 100 may generate light. In detail, the light source member 100 may generate light moving in the direction of the emission member 500 . In detail, the light source member 100 may emit laser light in the direction of the emitting member 500 .

The light source member 100 may emit light having at least one color. That is, the light source member 100 may emit light having one color or a plurality of lights having different colors.

For example, the light source member 100 may emit a plurality of lights having different colors. For example, the light source 100 may emit red light, green light, and blue light. That is, the light source member 100 may be a laser package from which laser light having a plurality of colors is emitted.

The light emitted from the light source member 100 may be transmitted to the lens module 200 . The light emitted from the light source member 100 may be directly transferred to the lens module 200 . Alternatively, the light emitted from the light source member 100 may be indirectly transmitted to the lens module 200 . That is, a reflective member may be additionally disposed between the light source member 100 and the lens module 200 to condense the light or change the path of the light, and the light generated from the light source member 100 and emitted is Light may enter the lens module 200 through the reflective member. In detail, at least one reflective member including a mirror or a prism may be additionally disposed between the light source member 100 and the lens module 200, and the light generated from the light source member 100 and emitted is Light may enter the lens module 200 through the reflective member.

Light emitted from the light source 100 may be incident to the lens module 200 . That is, the lens module 200 may be disposed in front of the emission surface of the light source member.

The lens module 200 may receive light emitted from the light source 100 and move it toward the first reflective member 300 .

The lens module 200 may include at least one lens, for example, the lens module 200 may include a plurality of lenses. For example, the lens module 200 may include three or more lenses spaced apart from each other and a lens barrel accommodating the lenses. In detail, the lens module 200 may include 3 to 6 lenses spaced apart from each other. At least one of the lenses of the lens module 200 may have a different material, size, and shape from other lenses. For example, the lens module 200 may include a first lens 210 receiving light emitted from the light source 100 and a second lens 220 emitting light to the reflective member 400. can That is, the second lens 220 may receive light emitted from the first lens 210 and emit the light to the reflection member 400 .

Meanwhile, in the direction of the second vertical vector V2 of the emission member 500, a part of the second lens 220 may be disposed between the reflection member 400 and the emission member 500.

In addition, in the direction of the second perpendicular vector V2 of the emission member 500, the center of the second lens 220 is the distance between the extension line E2 of the second reflection member 400 and the emission member 500. It may be disposed between the extension lines E1.

That is, the first lens 210 may be disposed most adjacent to the input part of the lens module 200, and the second lens 220 may be disposed most adjacent to the output part of the lens module 200. there is.

Accordingly, a distance between the second lens 210 and the emission member 500 may be smaller than a distance between the first lens 210 and the emission member 500 . In other words, a distance in which light travels between the second lens 220 and the emission member 500 may be smaller than a distance in which light travels between the first lens 210 and the emission member 500 .

In detail, in the vertical vector direction of the emission member 500, the distance between the optical axis of the second lens 220 and the extension line E1 of the emission member 500 is the distance between the optical axis of the first lens 210 and the optical axis of the first lens 210. It may be disposed closer than the distance between the extension lines E1 of the emission member 500 .

The lens module 200 may control an emission angle of light moving toward the first reflective member 300 . In detail, the lens module 200 may control an emission angle of light emitted out of the lens module 200 . That is, the lens module 200 may be a relay lens that controls the emission angle of the light.

Since the angle of light emitted from the lens module 200 is controlled, an incident area of light incident to the light emitting member 500 may be reduced. Accordingly, it is possible to prevent an increase in the size of the emission member due to an increase in the emission angle of the light.

Light emitted from the lens module 200 may be incident to the reflective member 400 . That is, the reflective member 400 may be disposed facing the emission surface of the lens module 200 . Also, the reflective member 400 may be disposed facing the emission member 500 .

The reflective member 400 may include a support part 410 and a mirror 420 disposed on the support part 410 .

A magnet generating electromagnetic force is included inside the support part 410, and the mirror 420 can be driven horizontally and vertically by the electromagnetic force generated by the magnet.

The mirror 420 may rotate in a first direction and a second direction. That is, the mirror 420 is rotatable in two directions and can reflect light while rotating in both directions. Accordingly, the second reflection member 400 can scan in vertical and horizontal directions.

In detail, the reflective member 400 may receive light transmitted from the light source member 100 and the lens module 200 and project the light in horizontal and vertical directions. For example, the reflective member 400 projects the synthesized light in a horizontal direction with respect to a first line (horizontal scanning), moves vertically to a second line (vertical scanning), and then moves the light again in a horizontal direction with respect to the second line. It can project light in a direction (horizontal scanning). That is, the second reflection member 400 moves in the X-axis direction and the Y-axis direction, by repeating the scanning in the horizontal and vertical directions. The reflection member 400 may project an image to be displayed onto the emission member 500 . That is, the reflective member 400 may be a MEMS scanner or a mirror.

Light scanned from the reflective member 400 enters the emission member 500 . The emission member 500 may include glass. The emission member 500 may be inserted and disposed in the opening OA of the second housing 1200 .

The emission member 500 may be disposed facing the reflective member 400 .

Meanwhile, although not shown in the drawings, a wave guide may be disposed outside the optical module 10 . Light passing through the emitting member 500 may be reflected by the wave guide to which the hologram is attached. Accordingly, light may be incident to the eyes of a user wearing a display device including the optical module through the wave guide.

4 is a cross-sectional view of a portion of an optical module according to an embodiment.

Referring to FIG. 5 , the reflective member 400 may be disposed spaced apart from the lens module 200 and the emission member 500 .

The reflective member 400 may be disposed to be spaced apart from the lens module 200 .

A distance d1 between the reflective member 400 and the lens module 200 may be greater than or equal to 0.7 mm. In more detail, the distance d1 between the reflective member 400 and the lens module 200 may be greater than or equal to 0.8 mm. In more detail, the distance d2 between the reflective member 400 and the lens module 200 may be 0.9 mm. In more detail, the distance d2 between the reflective member 400 and the lens module 200 may be 0.7 mm to 1.1 mm. More specifically, the distance d2 between the reflective member 400 and the lens module 200 may be 0.9 mm to 1.0 mm.

Here, the distance d1 between the reflective member 400 and the lens module 200 may be defined as a distance from the center of the reflective member 400 to the center of the lens module 200 .

When the distance d1 between the reflective member 400 and the lens module 200 is less than 0.7 mm, the reflective member 400 and the lens module 200 may contact each other due to an error during a process. also. When an impact is applied to the optical member 10 from the outside, the reflective member 400 and the lens module 200 may collide due to the impact.

When the distance d1 between the reflective member 400 and the lens module 200 is greater than 0.5 mm, the distance between the reflective member 400 and the lens module 200 unnecessarily increases, thereby increasing the size of the optical module. may increase overall.

The reflective member 400 may be disposed spaced apart from the second housing 1200 .

A distance d2 between the reflective member 400 and the second housing 1200 may be greater than or equal to 0.9 mm. In detail, the distance d2 between the reflective member 400 and the second housing 1200 may be greater than or equal to 1.0 mm. In more detail, the distance d2 between the reflective member 400 and the second housing 1200 may be 0.9 mm to 1.3 mm. In more detail, the distance d2 between the reflective member 400 and the second housing 1200 may be 1.0 mm to 1.1.

Here, the distance d2 between the reflective member 400 and the second housing 1200 may be defined as a distance from the center of the reflective member 400 to the second housing 1200 .

When the distance d2 between the reflective member 400 and the second housing 1200 is less than 0.9 mm, the reflective member 400 and the second housing 1200 may come into contact due to an error during a process. . also. When an impact is applied to the optical member 10 from the outside, the reflective member 400 and the second housing 1200 may collide due to the impact.

When the distance d2 between the reflective member 400 and the second housing 1200 is greater than 1.3 mm, the distance between the reflective member 400 and the second housing 1200 unnecessarily increases and optical The size of the module as a whole can be increased.

The reflective member 400 may be inclined. In detail, the reflective member 400 may be disposed inclined toward the emission member 500 . The degree of inclination of the reflective member 400 may be defined as an angle between the reflective member 400 and the emission member 500 . In detail, when the first vertical vector V1 of the reflective member 400 is defined and the second vertical vector V2 of the emission member 500 is defined, the degree of inclination of the reflective member 400 is It may be defined as an angle formed by the first vertical vector V1 and the second vertical vector V2.

An angle between the first vertical vector V1 and the second vertical vector V2 may have a set size.

In detail, an angle θ1 between the first vertical vector V1 and the second vertical vector V2 may be greater than or equal to 10°. In detail, an angle θ4 between the first vertical vector V1 and the second vertical vector V2 may be greater than or equal to 20°. In more detail, an angle θ1 between the first vertical vector V1 and the second vertical vector V2 may range from 10° to 30°. In more detail, an angle θ1 between the first vertical vector V1 and the second vertical vector V2 may be 15° to 20°.

Since the reflective member 400 is inclined toward the emission member 500 at an angle within a set range, the reflective member 400 and the second housing 1200 contact each other due to the inclination of the reflective member 400 . can prevent it from happening. That is, it is possible to prevent the reflective member 400 from colliding with the second housing 1200 due to an external impact.

Also, the sum of the light L1 incident to the reflective member 400 and the output light L2 reflected by the reflective member 400 may be greater than or equal to 90°. In more detail, the sum of light incident to the reflective member 400 and outgoing light reflected from the reflective member 400 may be greater than or equal to 100°. In more detail, the sum of light incident to the reflective member 400 and outgoing light reflected from the reflective member 400 may be greater than or equal to 110°. In more detail, the sum of light incident to the reflective member 400 and outgoing light reflected from the reflective member 400 may be between 90° and 120°.

When the sum of the light incident to the reflective member 400 and the outgoing light reflected from the reflective member 400 is less than 90° or greater than 120°, the light incident to the reflective member 400 and the reflective member 400 ), the emitted light reflected from each other overlaps with each other, and optical efficiency may decrease.

That is, as the reflective member 400 is disposed when the reflective member 400 is inclined in the angular range, light incident to and reflected from the reflective member 400 may not overlap with each other.

The lens module 200 may be disposed at an angle. In detail, the lens module 200 may be disposed inclined toward the emission member 500 . The degree of inclination of the lens module 200 may be defined as an angle between the lens module 200 and the emission member 500 . In detail, when the second vertical vector V2 of the emitting member 500 is defined and the optical axis OA of the lens module 200 is defined, the degree of inclination of the lens module 200 is the second vertical vector V2. It may be defined as an angle formed by an extension of the vector V2 and an extension of the optical axis OA. That is, an angle between an extension of the optical axis OA of the lens module 200 and a vertical vector of the second reflective member 400 may be an angle between the lens module and the second reflective member.

An angle between the second vertical vector V2 and the optical axis OA may have a set size.

In detail, an angle θ2 between the second vertical vector V2 and the optical axis OA may be greater than or equal to 50°. In more detail, an angle θ2 between the second vertical vector V2 and the optical axis OA may be greater than or equal to 55°. In more detail, an angle θ5 between the second vertical vector V2 and the optical axis OA may be 50° to 70°. In more detail, the angle θ2 between the second vertical vector V2 and the optical axis OA may be 58° to 63°.

As the lens module 200 is tilted at an angle within the above range, light emitted from the lens module 200 may be emitted toward the reflective member 400 having the tilt. That is, the lens module 200 may be inclined at the above-described inclination angle to minimize optical loss of light incident to the reflective member 400 .

The optical axis OA of the lens module 200 and the reflective member 400 may have an angle within a set range. In detail, the optical axis OA of the lens module 200 may have an angle between a vertical vector of the reflective member 400 and a set range.

In detail, an angle θ3 between the optical axis OA of the lens module 200 and the vertical vector of the reflective member 400 may be greater than or equal to 30°. In more detail, an angle θ3 between the optical axis OA of the lens module 200 and the vertical vector V1 of the reflective member 400 may be greater than or equal to 40°. In more detail, an angle θ3 between the optical axis OA of the lens module 200 and the vertical vector V1 of the reflective member 400 may be 50°. In more detail, an angle θ3 between the optical axis OA of the lens module 200 and the vertical vector V1 of the reflective member 400 may range from 40° to 60°. In more detail, an angle θ3 between the optical axis OA of the lens module 200 and the vertical vector V1 of the reflective member 400 may range from 50° to 52°.

When the angle θ3 between the optical axis OA of the lens module 200 and the vertical vector of the reflective member 400 is less than 30° or greater than 60°, the light emitted from the lens module 200 reflects the reflected light. When incident on the member 400 and reflected, the light incident on the reflective member 400 and the reflected light may overlap each other.

Hereinafter, with reference to FIG. 5 . An example of a display device including the optical member 10 according to the embodiment will be described.

Referring to FIG. 6 , the optical member 10 according to the embodiment may be applied to a wearable display device. In detail, the optical member 10 according to the embodiment may be applied to a wearable display device worn on a human head or an ear of a human body.

For example, the display device 3000 may be an augmented reality device.

The display device 3000 may include a wearable part 3100, an optical member 10, and a display part 3200.

The wearing part 3100 may extend in one direction. The wearable part 1000 may be worn on a user's body. For example, the wearable part 1000 may be worn on the user's head or ear, whereby the display device 3000 may be fixed to the user's body.

The optical member 10 may be connected to the wearing part 3100 . The optical member 10 may be disposed adjacent to the display unit 3200 . The member 10 may transmit light from which an image is scanned in the direction of the display unit 3200, and the light passing through the display unit 3200 may be transmitted to the user's eyes.

Accordingly, the user can view virtual reality and augmented reality of real reality through the optical member.

Features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

In addition, although the above has been described with a focus on the embodiments, these are only examples and do not limit the present invention, and those skilled in the art to which the present invention belongs can exemplify the above to the extent that does not deviate from the essential characteristics of the present embodiment. It will be seen that various variations and applications that have not been made are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (6)

housing; and
a lens module disposed within the housing;
a reflective member that reflects light emitted from the lens module; and
An emitting member through which light reflected from the reflective member is emitted;
When the first vertical vector of the reflective member is defined and the second vertical vector of the emitting member is defined, the degree of inclination of the reflective member is defined as an angle formed by the first vertical vector and the second vertical vector, ,
The optical member wherein an angle between the first vertical vector and the second vertical vector is 10° to 30°. According to claim 1,
The optical member of claim 1, wherein the sum of light incident to the reflective member and outgoing light reflected from the reflective member is 90° to 120°. According to claim 1,
When the second vertical vector of the emitting member is defined and the optical axis of the lens module is defined, the degree of inclination of the lens module is defined as an angle formed by an extension of the second vertical vector and an extension of the optical axis,
An angle between the second perpendicular vector and the optical axis is 50 ° to 70 ° optical member. According to claim 1,
An angle between an optical axis of the lens module and a first vertical vector of the reflective member is 40° to 60°. According to claim 1,
A distance between the reflective member and the lens module is 0.7 mm to 1.1 mm optical member. According to claim 1,
An optical member wherein a distance between the reflective member and the housing is in a range of 0.9 mm to 1.3 mm.

Images