CN221668119U - Head-mounted display devices - Google Patents

Abstract

The utility model discloses a head-mounted display device, which comprises: a frame; the display lens is used for displaying a virtual image and is arranged in the glasses frame; the anti-dazzling screen is arranged on one side, deviating from the emergent light of the virtual image of the display lens, of the anti-dazzling screen, a plurality of light through holes are formed in the anti-dazzling screen, so that human eyes can receive a real picture through the plurality of light through holes, and at least one part of the display lens is shielded by the anti-dazzling screen, so that the brightness ratio of the virtual image to the real picture can be adjusted. According to the head-mounted display device provided by the utility model, the light rays of the virtual image can be directly emitted to the human eyes after exiting from the display lens, and the light rays of the real image are shielded by the light shielding sheet, and only part of the light rays can be emitted to the human eyes through the light passing holes, so that the brightness of the real image is reduced, the brightness ratio between the virtual image and the real image is adjusted, and the display effect of the head-mounted display device is improved.

Description

Head-mounted display devices

Technical Field

The utility model relates to the technical field of augmented reality, in particular to a head-mounted display device.

Background Art

AR (Augmented Reality) glasses and other head-mounted display devices can superimpose virtual information onto the real world, allowing the real environment and virtual objects to be superimposed on the same screen in real time and displayed in front of the user's eyes, enhancing the user's sense of reality.

When a user wears AR glasses, ambient light enters the user's eyes to allow the user to see the real world. When a user wears AR glasses, the visual effect is that the virtual image displayed on the display is projected into the real world. The best display effect can only be achieved when the brightness ratio between the virtual image and the real environment is appropriate.

Since the virtual image needs to be reflected and refracted multiple times before being projected to the human eye, the human eye can only see a part of the original brightness of the screen. Intuitively speaking, the virtual image we see is very dark. In order to solve the problem of low display brightness, a high-brightness DLP screen is usually used to increase the brightness. However, this may cause problems such as excessive size of the optical machine, high cost, high power consumption and reduced product endurance. Therefore, it is necessary to find a new solution to adjust the brightness ratio between the virtual image and the real environment to improve the display effect of the head-mounted display device.

Utility Model Content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a head-mounted display device, which can improve the contrast between the virtual image and the real environment and enhance the display effect of the head-mounted display device.

The head mounted display device according to the utility model comprises:

Frames;

A display lens, the display lens is used to display a virtual image, and the display lens is arranged in the lens frame;

A shading sheet is arranged on the side of the display lens from which light of the virtual image is emitted, and is provided with a plurality of light-through holes so that the human eye can receive the real picture through the plurality of light-through holes. The shading sheet at least blocks a part of the display lens to adjust the brightness ratio between the virtual image and the real picture.

In some embodiments, the plurality of light-through holes are arranged in a matrix.

In some optional embodiments, the light-through hole is a circular hole, and the diameter of the light-through hole is d, wherein: 1mm≤d≤3mm.

In some optional embodiments, a row spacing of the plurality of light-through holes is the same as a column spacing of the plurality of light-through holes, and the row spacing and the column spacing are h, wherein: 5 mm≤h≤15 mm.

In some embodiments, the light shielding sheet is bonded to the display lens by optical adhesive.

In some embodiments, a detachable connecting mechanism is further included, and the shading sheet and the lens frame are detachably connected via the detachable connecting mechanism.

In some optional embodiments, a buckle is provided on one of the lens frame and the light shielding sheet, and a slot is provided on the other of the lens frame and the light shielding sheet, and the lens frame and the light shielding sheet are snap-fitted and connected.

In some optional embodiments, both the lens frame and the shading sheet are provided with a magnetic structure, and the lens frame and the shading sheet are magnetically connected.

In some embodiments, the shading sheet is made of black polypropylene.

In some embodiments, it also includes:

Temples, the temples being connected to the frame;

An optical machine is disposed on the temples and is used to emit light of a virtual image and transmit it to the display lens.

According to the head-mounted display device of the utility model, a shading sheet is provided on the side of the display lens from which the light of the virtual image is emitted, and a plurality of light holes are provided on the shading sheet, and the shading sheet at least blocks a portion of the display lens. Therefore, the light of the virtual image can be directly emitted to the human eye after being emitted from the display lens, while the light of the real picture is blocked by the shading sheet, and only a part of the light can be emitted to the human eye through the light holes, thereby reducing the brightness of the real picture, so as to adjust the brightness ratio between the virtual image and the real picture and improve the display effect of the head-mounted display device. In addition, the shading sheet has a simple structure and a low manufacturing cost, which can further reduce the size and cost of the head-mounted display device.

Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a head mounted display device according to an embodiment of the present invention;

FIG2 is a schematic diagram of a light shielding sheet according to an embodiment of the present utility model;

FIG3 is a schematic diagram of a head mounted display device according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a head mounted display device according to another embodiment of the present invention.

Reference numerals:

100: head mounted display device; 10: frame; 11: buckle; 20: display lens; 30: shading sheet; 31: light hole; 32: slot; 40: temple; 50: optical machine.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and/or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and/or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and/or the use of other materials.

The head mounted display device 100 according to an embodiment of the present invention is described below with reference to FIGS. 1 to 4 . For example, the head mounted display device 100 may be AR glasses, etc. Augmented reality AR is the main form of smart wearables in the future and is a device that links the virtual world with the real world. AR technology, with the help of scientific technologies such as electronic computer processing, applies virtual information to the real world through simulation and superposition, and is perceived by human senses, achieving a sensory experience beyond reality.

As shown in FIG1 , the head mounted display device 100 includes a frame 10, a display lens 20 and a light shielding sheet 30, wherein the display lens 20 is disposed in the frame 10. It can be understood that the material of the frame 10 can be metal, plastic or carbon fiber, etc. In order to reduce the weight of the head mounted display device 100, the frame 10 can be made of a new type of fiber material with high strength and high modulus, which is light in weight and can avoid the sense of oppression caused by the user wearing the head mounted display device 100 for a long time. The display lens 20 can be disposed in the frame 10 by bonding, snapping, etc., and the embodiment of the utility model does not limit the connection method between the display lens 20 and the frame 10.

Furthermore, the display lens 20 is used to display the virtual image. Specifically, the display lens 20 can be an array optical waveguide or a diffraction optical waveguide, etc. The virtual image is projected into the human eye after passing through the display lens 20, and the light of the real picture can enter the human eye through the display lens 20, thereby realizing the superposition of the virtual image and the real picture, and realizing the display effect of augmented reality.

It can be understood that when the head-mounted display device 100 is binocular, the number of display lenses 20 can be two to match the user's left eye and right eye respectively; when the head-mounted display device 100 is monocular, the number of display lens 20 can be one to match only one of the user's left eye and right eye.

Please refer to Figure 2 as well. Further, the shading sheet 30 is arranged on the side of the light emission of the virtual image away from the display lens 20. A plurality of light holes 31 are arranged on the shading sheet 30 so that the human eye can receive the real picture through the plurality of light holes 31. The shading sheet 30 at least blocks a part of the display lens 20 to improve the contrast between the virtual image and the real picture.

It should be noted that the shading film 30 is arranged on the side of the virtual image of the display lens 20 from which the light is emitted, so the shading film 30 will not affect the light of the virtual image; and because the shading film 30 at least blocks a portion of the display lens 20, the light of the real picture must pass through the shading film 30 before entering the human eye. The shading film 30 is formed of an opaque material, and the light of the display picture can only be transmitted to the human eye through the part of the light through hole 31, resulting in a reduction in the brightness of the real picture.

The inventors found in actual research that when wearing a head-mounted display device, the best display effect can only be achieved when the brightness ratio between the virtual image and the real environment is appropriate. Since the virtual image needs to be projected to the human eye after multiple reflections and refractions, only a part of the original brightness of the screen can be seen by the human eye, resulting in a very dark virtual image. Therefore, there is a large brightness gap between the virtual image and the real environment, which affects the display effect of the head-mounted display device.

In view of this, according to the head-mounted display device 100 of the present invention, a shading sheet 30 is arranged on the side of the display lens 20 from which the light of the virtual image is emitted, and a plurality of light holes 31 are arranged on the shading sheet 30, and the shading sheet 30 at least blocks a portion of the display lens 20. Therefore, the light of the virtual image can be directly emitted to the human eye after being emitted from the display lens 20, while the light of the real picture is blocked by the shading sheet 30, and only part of the light can be emitted to the human eye through the light holes 31, thereby reducing the brightness of the real picture, so as to adjust the contrast between the virtual image and the real picture and improve the display effect of the head-mounted display device 100. In addition, the shading sheet 30 has a simple structure and a low manufacturing cost, which can further reduce the size and cost of the head-mounted display device 100.

Please continue to refer to Figure 2. In some embodiments, multiple light holes 31 are arranged in a multi-row and multi-column array. It can be understood that the multiple light holes 31 on the light shielding sheet 30 can be arranged in an array of multiple rows and columns, so that the arrangement of the light holes 31 is more regular, so that the light of the real picture passes through the light holes 31 more evenly, and the display effect of the head-mounted display device 100 is further enhanced. In addition, the light holes 31 arranged in an array are conducive to simplifying the manufacturing process of the light shielding sheet 30 and reducing the production cost of the light shielding sheet 30. Of course, the multiple light holes 31 can also be randomly arranged on the light shielding sheet 30, or arranged on the light shielding sheet 30 according to other rules, and the embodiment of the utility model is not limited to this.

Please continue to refer to FIG. 2. In some optional embodiments, the light-through hole 31 is a circular hole, and the diameter of the light-through hole 31 is d, wherein: 1mm≤d≤3mm, that is, the diameter of the plurality of light-through holes 31 can be any value in the range of 1mm-3mm. Specifically, for example, the diameter of the light-through hole 31 can be 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, etc. It can be understood that the diameters of the plurality of light-through holes 31 can be the same or different. Therefore, by setting the aperture of the light-through hole 31 within the above range, the brightness of the real picture can be guaranteed, and the brightness ratio of the virtual image and the real picture can be appropriate, thereby improving the display effect of the head-mounted display device 100. In addition, the light-through hole 31 is designed to be circular and regular in shape, which is conducive to the transmission of light, and the light-shielding sheet 30 has a simple structure and low manufacturing cost, which can further reduce the size and cost of the head-mounted display device 100.

It should be noted that the plurality of light-through holes 31 may also be in the shape of a triangle, a quadrilateral, a pentagon or other polygons, and the embodiment of the utility model is not limited thereto.

Please continue to refer to FIG. 2 . In some optional embodiments, the row spacing of the plurality of light holes 31 is the same as the column spacing of the plurality of light holes 31 , and the row spacing and the column spacing are h, wherein: 5mm≤h≤15mm, that is, the row spacing and the column spacing of the plurality of light holes 31 can be any value in the range of 5mm-15mm. Specifically, for example, the row spacing and the column spacing of the plurality of light holes 31 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc. Thus, the distance between the plurality of light holes 31 is moderate, the uniformity of the brightness of the real picture can be improved, and the brightness of the real picture can be ensured, so that the brightness ratio of the virtual image and the real picture is appropriate, thereby improving the display effect of the head mounted display device 100.

It should be noted that the row spacing and column spacing of the plurality of light holes 31 may be the same, that is, among the plurality of light holes 31 arranged in multiple rows and columns, the row spacing of the plurality of light holes 31 is the same, and the column spacing of the plurality of light holes 31 is the same, and at the same time, the row spacing and the column spacing are also the same, that is, the row direction distance and the column direction distance between two adjacent light holes 31 are the same. Of course, the distance between two adjacent light holes 31 may also be different, and the embodiment of the utility model is not limited to this. For example, the row spacing and the column spacing of the plurality of light holes 31 are different, and the row direction distance and the column direction distance between two adjacent light holes 31 are also different, as long as the row direction distance and the column direction distance between two adjacent light holes 31 are within the above range of h.

In some embodiments, the plurality of light holes 31 may also be arranged in concentric circles, that is, a light hole 31 is provided at the center of the light shielding sheet 30, and the center of the light hole 31 is used as the center of the concentric circle, and the plurality of light holes 31 are arranged around the center of the concentric circle to form an array of light holes 31 arranged in concentric circles. In this case, the spacing between any two adjacent light holes 31 may be 5 mm ≤ h ≤ 15 mm.

It can be understood that the number of light holes 31 can be set according to needs. Specifically, for example, when the external ambient light is strong, the number of light holes 31 can be set to be smaller, and the light holes 31 are roughly arranged at the position where the shading sheet 30 is aligned with the pupil of the human eye. When the external ambient light is weak, the number of light holes 31 can be increased, so that more light from the display screen can enter the human eye, so as to adjust the brightness ratio between the virtual image and the real image, and enhance the display effect of the head-mounted display device.

Please refer to FIG. 1-FIG. 2. In some embodiments, the shading sheet 30 is bonded to the display lens 20 by optical glue. Optical glue is a colorless and transparent glue with a light transmittance of more than 95%, good bonding strength, can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage. By using optical glue to bond the shading sheet 30 to the display lens 20, the strength of the display lens 20 can be enhanced, the display lens 20 can be prevented from breaking, and the stability of the head-mounted display device 100 can be improved. In addition, the optical glue will not affect the display effect.

Please refer to FIG. 3 . In some embodiments, the head mounted display device 100 further includes a detachable connection mechanism, and the shading sheet 30 is detachably connected to the frame 10 through the detachable connection mechanism. Thus, the shading sheet 30 is connected to the frame 10 through the detachable connection mechanism. When the brightness of the external environment is high, the shading sheet 30 can be installed on the frame 10, thereby reducing the brightness of the real picture, adjusting the brightness ratio of the virtual image to the real picture, and improving the display effect of the head mounted display device 100. When the brightness of the external environment is dark, the shading sheet 30 can be removed from the frame 10, so that more light from the real picture can enter the human eye, further adjusting the brightness ratio of the virtual image to the real picture, and further improving the display effect of the head mounted display device 100.

Please refer to FIG. 3 , in some optional embodiments, one of the frame 10 and the shading sheet 30 is provided with a buckle 11, and the other of the frame 10 and the shading sheet 30 is provided with a slot 32, so that the frame 10 and the shading sheet 30 are snap-connected. Specifically, for example, the frame 10 may be provided with a buckle 11, and the shading sheet 30 may be provided with a slot 32, or the frame 10 may be provided with a slot 32, and the shading sheet 30 may be provided with a buckle 11, so that the shading sheet 30 and the frame 10 are snap-connected. Therefore, the frame 10 and the shading sheet 30 that are detachably connected by the buckle 11 and the slot 32 are simple in structure and simple in manufacturing process, and the production cost of the head mounted display device 100 is further reduced.

In some optional embodiments, the frame 10 and the shading sheet 30 are both provided with a magnetic structure, and the frame 10 and the shading sheet 30 are magnetically connected. Thus, the frame 10 and the shading sheet 30 are easy to disassemble, further improving the user experience of the head mounted display device 100.

In some embodiments, the light shielding sheet 30 is made of black polypropylene. It can be understood that the light shielding sheet 30 is formed of an opaque material, so that the portion of the light shielding sheet 30 other than the light through hole 31 is opaque. Specifically, for example, the light shielding sheet 30 can be made of black polypropylene. Of course, the light shielding sheet can also be made of other dark resins and other materials. The embodiment of the utility model does not limit the material of the light shielding sheet 30.

Please refer to Figure 4 as well. In some embodiments, the head-mounted display device 100 also includes temples 40 and an optical machine 50, and the temples 40 are connected to the frame 10; specifically, the temples 40 and the frame 10 can be detachably connected, for example, by screw holes, etc., so as to facilitate the disassembly of the head-mounted display device 100 and facilitate the storage of the head-mounted display device 100.

Further, the optical engine 50 is arranged on the temple 40, and the optical engine 50 is used to emit the light of the virtual image and transmit it to the display lens 20. Therefore, by arranging the optical engine 50 on the temple 40, the weight of the head mounted display device 100 can be well balanced, and the user experience can be further improved. It can be understood that the optical engine 50 may include a display screen and a collimating lens group, and the display screen may be an OLED/LCOS screen, a DLP screen, a MicroLED screen, etc. The light of the virtual image emitted by the display screen is collimated by the collimating lens group and then enters the display lens 20, and then is emitted to the human eye after passing through the display lens 20.

Other structures and operations of the head mounted display device 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. A head mounted display device, comprising: Frames; A display lens, the display lens is used to display a virtual image, and the display lens is arranged in the lens frame; A shading sheet is arranged on the side of the display lens from which light of the virtual image is emitted, and is provided with a plurality of light-through holes so that the human eye can receive the real picture through the plurality of light-through holes. The shading sheet at least blocks a part of the display lens to adjust the brightness ratio between the virtual image and the real picture. 2. The head-mounted display device according to claim 1 is characterized in that the plurality of light-through holes are arranged in an array of multiple rows and columns. 3 . The head-mounted display device according to claim 2 , wherein the light-through hole is a circular hole, and a diameter of the light-through hole is d, wherein: 1 mm≤d≤3 mm. 4. The head-mounted display device according to claim 3, characterized in that the row spacing of the plurality of light-through holes is the same as the column spacing of the plurality of light-through holes, and the row spacing and the column spacing are h, wherein: 5mm≤h≤15mm. 5. The head-mounted display device according to claim 1, characterized in that the shading sheet is adhered to the display lens by optical adhesive. 6. The head-mounted display device according to claim 1 is characterized in that it also includes a detachable connecting mechanism, and the shading sheet and the frame are detachably connected through the detachable connecting mechanism. 7. The head-mounted display device according to claim 6 is characterized in that a buckle is provided on one of the lens frame and the shading sheet, and a slot is provided on the other of the lens frame and the shading sheet, and the lens frame and the shading sheet are snap-connected. 8. The head-mounted display device according to claim 6, characterized in that both the lens frame and the shading sheet are provided with a magnetic attraction structure, and the lens frame and the shading sheet are magnetically connected. 9. The head mounted display device according to any one of claims 1 to 8, characterized in that the shading sheet is made of black polypropylene. 10. The head mounted display device according to any one of claims 1 to 8, further comprising: Temples, the temples being connected to the frame; An optical machine is disposed on the temples and is used to emit light of a virtual image and transmit it to the display lens.