Patent ID: 12196968

DESCRIPTION OF EMBODIMENTS

The following describes the embodiments of this application with reference to the accompanying drawings in the embodiments of this application.

FIG.1is a schematic structural diagram of an implementation of a head-mounted display apparatus according to an embodiment of this application. The head-mounted display apparatus100may be augmented reality (AR) glasses or an AR helmet. The head-mounted display apparatus100in the embodiment shown inFIG.1is described by using AR glasses as an example.

As shown inFIG.1, the head-mounted display apparatus100includes a lens frame10, a display module20, and a lens30. Optionally, the lens frame10includes a frame11and legs12. The frame11may include nose pads configured to be put on the nose of a user. In addition, the legs12are configured to be put on the ears of the user. In this case, when the user wears the head-mounted display apparatus100on his head, the head-mounted display apparatus100may be fixed on the head of the user by using the legs13and the nose pads.

In addition, there are two lenses30. The two lenses30are both mounted on the lens frame10. Specifically, the frame11is provided with two mounting holes. A shape of the mounting hole matches that of the lens30. The two lenses30are mounted in the two mounting holes in a one-to-one correspondence. In this case, the user can see the real world through the two lenses30. Certainly, in another embodiment, a quantity of lenses30is not limited. For example, there may be alternatively one lens30, but a size of the lens30can cover both eyes of the user. In this case, the frame11is provided with one mounting hole. The lens30is directly mounted in the mounting hole. The user can see the real world directly through the lens30with both eyes.

In addition, there are two display modules20. The display modules20may be mounted on the lens frame10. Optionally, the display modules20may be disposed inside the frame11, to effectively protect the display modules20by using the frame11, and avoid damage caused by collision between the display modules20and an external article. Each display module20is disposed in correspondence with one lens30. The two display modules20respectively provide virtual images for the two lenses30. The virtual image may be, but is not limited to, a three-dimensional virtual image. Optionally, the display module20may be, but is not limited to, a display screen or a projector. In addition, the display module20may be a mini display module, for example, a mini display screen or a mini projector. Certainly, in another embodiment, there may be alternatively one display module20. The display module20provides virtual images for the two lenses30through partitioning. In addition, the display module20may be wirelessly communicatively connected to an external device. In this case, the display module20can receive a virtual image provided by the external device, and provide the received virtual image to the user through the lens30.

In this embodiment, the lens30can transmit display light emitted by the display module20to the eyes of the user, so that the user can see, by using the lens30, a virtual image displayed by the display module20. In addition, the lens30can transmit ambient light to the eyes of the user, so that the user can receive ambient light from the real world by using the lens30, to see the real world. Therefore, the head-mounted display apparatus100in this embodiment can enable the user to see a combined image of a real image and a virtual image.

For example, the user can play a three-dimensional virtual reality game by using the head-mounted display apparatus100. In this case, when the user wears the head-mounted display apparatus100, the lens30transmits the real world as a background image to the eyes of the user. For example, the real world is a forest. In this case, the user sees an image of a forest. In addition, the display module20can provide a three-dimensional virtual image including a first virtual object and a second virtual object. For example, the first virtual object is a weapon, and the second virtual object is a character. In this case, the lens30transmits the first virtual object and the second virtual object provided by the display module20to the eyes of the user. In this case, the user sees an image of a forest with a virtual weapon and a virtual character.

According to the foregoing descriptions, the user can see, by using the head-mounted display apparatus100, a combined image of a real image and a virtual image. The following specifically describes the light propagation paths of a first part31and a second part32of the lens30with reference toFIG.2.FIG.2is a schematic diagram of light paths of the display module20and the lens30of the head-mounted display apparatus100shown inFIG.1.

As shown inFIG.2, the lens30includes the first part31and the second part32. The first part31is adjacent to the second part32. To be specific, the second part32is located at a periphery of the first part31. The periphery of the first part31is a region around the first part31. In this case, the first part31can be effectively protected by the second part32, to avoid damage to the first part31. It can be understood thatFIG.2illustrates that the second part32includes a first body part326and a second body part327. The first body part326and the second body part327are respectively located on two sides of the first part31. The first body part326, the first part31, and the second body part327are spliced into a continuous lens30. However, a structure of the second part32is not limited to the structure shown inFIG.2. For example, the structure of the second part32may be alternatively a structure shown inFIG.12,FIG.14, orFIG.15(a)andFIG.15(b). For specific descriptions, refer to the following descriptions.

In this embodiment, the second part32is disposed to include the first body part326and the second body part327that are separated, so that when the second part32is mounted on the first part31, the first body part326and the second body part327may be mounted on two sides of the first part31. In this case, a manner of assembling the lens30is relatively simple and is easy to perform.

As shown inFIG.2, display light emitted by the display module20enters the eyes of the user after passing through/being transmitted through the first part31. Ambient light may also enter the eyes of the user after passing through/being transmitted through the first part31. Alternatively, ambient light may enter the eyes of the user after passing through/being transmitted through the second part32, so that the user can see a real world through the second part32. Therefore, the user can see a real world in a larger region through cooperation between the second part32and the first part31, thereby improving comfort of viewing an outside world by the user. Certainly, the real world seen by the user through the first part31and the real world seen through the second part32may partially overlap.

The following describes an example structure of the first part31of the lens30and propagation paths of light (the light including display light and ambient light) in the first part31with reference toFIG.3toFIG.5.FIG.3is a schematic structural diagram of an implementation of the lens30of the head-mounted display apparatus100shown inFIG.1.FIG.4is a schematic exploded view of the lens30shown inFIG.3from a particular perspective.FIG.5is a schematic diagram of light paths of the first part of the lens shown inFIG.3.

Referring toFIG.3andFIG.4, the first part31includes a free-form prism311, a beam splitter312, and a compensating prism313that are sequentially stacked. The beam splitter312is located between the free-form prism311and the compensating prism313. It can be understood that, when light (including ambient light and display light) propagates to the beam splitter312, the beam splitter312can reflect half of the light and transmit half of the light. The free-form prism311, the beam splitter312, and the compensating prism313are located between the first body part326and the second body part327.

As shown inFIG.4and with reference toFIG.3, the free-form prism311includes a first incident plane3112, a second incident plane3111(FIG.3illustrates the second incident plane3111from a different perspective), and a first exit plane3113(FIG.3illustrates the first exit plane3113from a different perspective). It can be understood that the first incident plane3112and the first exit plane3113are opposite to each other. The second incident plane3111is located between the first incident plane3112and the first exit plane3113. The first incident plane3112is adjacent to the beam splitter312, that is, the beam splitter312is located between the first incident plane3112and the compensating prism313. It can be understood that, when the user wears the head-mounted display apparatus100, the first exit plane3113faces the eyes of the user, that is, the eyes of the user receive light that exits from the first exit plane3113. It can be understood that the beam splitter312is configured to reflect display light received by the second incident plane3111to the first exit plane3113. The beam splitter312is further configured to transmit ambient light that enters from the compensating prism313to the first incident plane3112.

As shown inFIG.4, the compensating prism313has a third incident plane3131. The third incident plane3131is a surface of the compensating prism313that is opposite to the beam splitter312. Ambient light enters the compensating prism313through the third incident plane3131. Further, the first incident plane3112is configured to enable the ambient light that enters the compensating prism313to enter the free-form prism311. The second incident plane3111is configured to receive display light emitted by the display module20(refer toFIG.2), that is, enable the display light emitted by the display module20(refer toFIG.2) to enter the free-form prism311. The first exit plane3113is configured to enable the display light and the ambient light that enter the free-form prism311to exit from the free-form prism311. Specifically, light transmission paths of the first part31are specifically described below with reference toFIG.5.

In referring toFIG.5, after the display module20emits the display light, the display light enters the free-form prism311through the second incident plane3111. In this case, a part of the display light propagates to the beam splitter312through total reflection by the first exit plane3113. This part of display light is then reflected by the beam splitter312, exits from the first exit plane3113, and is projected to the eyes of the user. In this case, the user can receive a virtual image transmitted by the display module20. In addition, ambient light enters the compensating prism313through the third incident plane3131of the compensating prism313. In this case, the ambient light is sequentially transmitted through the compensating prism313and the beam splitter312and propagates to the first incident plane3112, and enters the free-form prism311through the first incident plane3112. The ambient light that enters the free-form prism311exits from the first exit plane3113, and is projected to the eyes of the user. In this case, the user can receive the ambient light, that is, the user can see a real world. Therefore, the user can see, through the first part31, a composite image that combines a real image with a virtual image.

The foregoing specifically describes an example structure of the first part31and the propagation paths of the light in the first part31. The following describes several implementations of a location relationship and a connection relationship between the structures of the first part31with reference toFIG.4andFIG.6.FIG.6is a schematic exploded view of the lens30shown inFIG.3from another perspective.

As shown inFIG.4, the shapes of the third incident plane3131and the first exit plane3113(FIG.3illustrates the first exit plane3113from a different perspective) may be the same. It can be understood that, because the shapes of the first incident plane3112and the first exit plane3113of the free-form prism311are different, the ambient light is distorted when the ambient light enters the free-form prism311from the first incident plane3112and exits from the first exit plane3113. In this case, the compensating prism313is disposed on the first incident plane3112, and a shape of the third incident plane3131of the compensating prism313may be the same as that of the first exit plane3113of the free-form prism311, so that the ambient light that enters the compensating prism313from the third incident plane3131and exits the free-form prism311from the first incident plane3113is not distorted. Certainly, when variations due to processing technique are taken into consideration, the shapes of the third incident plane3131and the first exit plane3113may be slightly different, that is, approximately the same.

In an implementation, a refractive index of the compensating prism313is the same as that of the free-form prism311. In this case, when ambient light passes through the compensating prism313and the free-form prism311, because the refractive index of the compensating prism313is the same as that of the free-form prism311, refractive changes of the ambient light in the compensating prism313and the free-form prism311are uniform. In this case, when the ambient light is projected to the eyes of the user, no image displacement occurs in the real world image presented to the eyes of the user. Therefore, comfort of viewing the real world by the user through the lens30is relatively good.

In an implementation, the beam splitter312is stacked on the first incident plane3112. The compensating prism313is fixed to the beam splitter312by an optically clear adhesive. It can be understood that the optically clear adhesive can fill a gap between the compensating prism313and the beam splitter312. To be specific, the optically clear adhesive can counteract tolerances that exist during production or fixing of the compensating prism313and the beam splitter312. Therefore, the first part31has relatively high integrity, and further, the first part31has relatively good appearance. To be specific, the user does not see a gap in the first part31. Certainly, in another embodiment, the beam splitter312is stacked on the compensating prism313. In this case, the free-form prism311is fixed to the beam splitter312by using an optically clear adhesive.

In addition, a refractive index of the optically clear adhesive is the same as that of the compensating prism313. When ambient light passes through the compensating prism313and the optically clear adhesive, because the refractive index of the optically clear adhesive is the same as that of the compensating prism313, refractive changes of the ambient light in the compensating prism313and the optically clear adhesive are uniform. In this case, when the ambient light is projected to the eyes of the user, no image displacement occurs in the real world image presented to the eyes of the user. Therefore, comfort of viewing the real world by the user through the lens30is relatively good.

In addition, because the refractive index of the optically clear adhesive is the same as that of the compensating prism313, the optically clear adhesive and the compensating prism313are integrated as one component. In this case, no obvious connection surface or connection line appears at a junction between the optically clear adhesive and the compensating prism313, thereby ensuring a relatively good appearance of the first part31. To be specific, when the user looks at the first part31, no obvious connection surface or connection line appears in the first part31.

As shown inFIG.6, the compensating prism313includes a third exit plane3132. The third exit plane3132is a surface of the compensating prism313that faces the free-form prism311. The third exit plane3132and the third incident plane3131(refer toFIG.4) are opposite to each other. The shapes of the third exit plane3132and the first incident plane3112(FIG.4illustrates the first incident plane3112from different perspectives) may be the same. It can be understood that, if the third exit plane3132of the compensating prism313is directly attached to the first incident plane3112of the free-form prism311, no large gap appears between the third exit plane3132and the first incident plane3112, that is, the third exit plane3132and the first incident plane3112can be well fitted face to face. In this case, when the beam splitter312is disposed between the free-form prism311and the compensating prism313, because no large gap appears between the third exit plane3132and the first incident plane3112, a thickness of the beam splitter312does not need to be increased at a relatively large gap to fill the gap. Therefore, the thickness of the beam splitter312in this embodiment is relatively uniform. In this case, the brightness of ambient light that passes through the beam splitter312is also relatively uniform, that is, brightness of ambient light that passes through the first part31is also relatively uniform. Certainly, when processing technique variations are taken into consideration, the shapes of the third exit plane3132and the first incident plane3112may be slightly different, that is, approximately the same.

In addition, because no large gap appears between the third exit plane3132and the first incident plane3112, a propagation direction of ambient light does not change greatly due to the gap. Therefore, when the user views a real world through the first part31, an image seen by the user does not change greatly or abruptly. In this case, visual comfort of the user is relatively good.

The foregoing describes the propagation paths of the light in the first part31. It can be understood that, when the beam splitter312is disposed in the first part31, the beam splitter312reflects a part of the ambient light. In this case, the brightness of a real world image seen by the user through the first part31is relatively low. However, the second part32can allow most of the ambient light to pass. In this case, the brightness of a real world image seen by the user through the second part32is relatively high. In this case, when the eyes of the user are shifted from a location of the first part31to a location of the second part32, ambient light received by the user has a relatively large difference in brightness, thereby causing discomfort to the user. In this embodiment, a ratio of a transmittance of the second part32to a transmittance of the first part31is set within a threshold range. For example, the threshold range is from 0.5 to 1.5, so that the transmittance of the second part32is relatively close to that of the first part31. In this case, when the eyes of the user are shifted from the location of the first part31to the location of the second part32, the user does not feel uncomfortable due to a large difference in brightness of received ambient light. Therefore, the head-mounted display apparatus100in this embodiment provides better user experience. It can be understood that the threshold range is a preset range.

In addition, because different regions of the lens30have a relatively small difference in brightness, quality of an image displayed by the head-mounted display apparatus100is relatively good.

For another example, the threshold range is 0.9 to 1.1. A transmittance of the entire lens30is approximately uniform. In this case, the brightness of an entire region of the lens30seen by the user is approximately uniform. Therefore, when the eyes of the user are shifted from the location of the first part31to the location of the second part32, the user does not feel uncomfortable due to a large difference in brightness of received ambient light.

The following describes two embodiments of reducing the transmittance of the second part32with reference toFIG.7toFIG.11.

In a first embodiment, an anti-reflective film322is disposed in the second part32to reduce the transmittance of the second part32. In this embodiment, the anti-reflective film322may be formed in two implementations. In a first implementation, the anti-reflective film322is a plating layer formed, through magnetron sputtering or vapor deposition, between a first incident plane3211and a second exit plane3212. In a second implementation, the anti-reflective film322is one or more of a beam splitter, an absorbing film, or a polarizing film.

In a second embodiment, a color masterbatch324is disposed in a substrate323of the second part32to reduce the transmittance of the second part32.

First, the first embodiment is specifically described with reference toFIG.7toFIG.9. The anti-reflective film322is disposed in the second part32to reduce the transmittance of the second part32, so as to improve quality of an image displayed by the head-mounted display apparatus100.FIG.7is a schematic structural diagram of another implementation of the lens30of the head-mounted display apparatus100shown inFIG.1.FIG.8(a)is a partial schematic exploded view of the lens30shown inFIG.7. (a1) is a schematic exploded view from a particular perspective, and (a2) is a schematic exploded view from another perspective.FIG.8(b)is a schematic exploded view of the lens30shown inFIG.7.FIG.9is a schematic cross-sectional view of the lens30shown inFIG.7at a line A-A.

As shown inFIG.7, the second part32includes an optical lens321and the anti-reflective film322. The optical lens321may allow most of ambient light to pass.

In this embodiment, as shown inFIG.8(a)andFIG.8(b), the first part31is located between the first body part326and the second body part327. In addition, the first body part326is used as an example for description, that is, the first body part326includes the optical lens321and the anti-reflective film322. The anti-reflective film322is configured to reduce a permeability of ambient light, so as to reduce the transmittance of the second part32. In addition, the second body part327may also include an optical lens and an anti-reflective film. For related disposition of the optical lens and the anti-reflective film of the second body part327, refer to the first body part326. Details are not described below again.

As shown inFIG.8(b), the optical lens321includes the first incident plane3211and the second exit plane3212(FIG.7illustrates the second exit plane3212from another perspective) that are opposite to each other. The first incident plane3211is configured to enable ambient light to enter the optical lens321. The second exit plane3212is configured to enable the ambient light that enters the optical lens321to exit. It can be understood that, when the user wears the head-mounted display apparatus100, the second exit plane3212faces the eyes of the user. In this case, when ambient light enters the optical lens321through the first incident plane3211, the ambient light passes through the anti-reflective film322, and exits from the optical lens321through the second exit plane3212. The ambient light that exits from the optical lens321is projected onto the eyes of the user.

In this embodiment, the anti-reflective film322is disposed between the first incident plane3211and the second exit plane3212to reduce a transmittance of the first body part326, so that the transmittance of the first body part326is close to that of the first part31. In this case, when the user wears the head-mounted display apparatus100, no large brightness difference occurs between the first part31and the second part32of the lens30. To be specific, brightness of a real world seen by the user through the second part32is approximately the same as that of a real world seen through the first part31. Therefore, when the eyes of the user are shifted from directly facing the first part31to obliquely facing the second part32, the user does not feel uncomfortable due to a large difference in brightness of received ambient light, thereby improving user experience of the head-mounted display apparatus100in this embodiment.

Optionally, a refractive index of the optical lens321is the same as that of the compensating prism313. For example, the optical lens321and the compensating prism313are made of a same material. In this case, when ambient light passes through the first part31and the second part32, because the refractive index of the optical lens321is the same as that of the compensating prism313, refractive changes of the ambient light in the first part31and the second part32are uniform. In this case, when the ambient light is projected onto the eyes of the user, no image displacement occurs in the real world image presented to the eyes of the user. Therefore, the comfort of viewing the real world by the user through the lens30is relatively good.

Still referring toFIG.8(b), the optical lens321includes a first light transmission part3213and a second light transmission part3214that face each other. In this embodiment, the first body part326is used as an example for description. In this case, the first body part326includes the first light transmission part3213and the second light transmission part3214that face each other. The anti-reflective film322is disposed between the first light transmission part3213and the second light transmission part3214. In addition, for the second body part327, refer to the structural layout of the first body part326. Details are not described herein again.

In addition, a surface of the first light transmission part3213that is away from the second light transmission part3214is the first incident plane3211. A surface of the second light transmission part3214that is away from the first light transmission part3213is the second exit plane3212.

In this embodiment, the optical lens321is disposed to include the first light transmission part3213and the second light transmission part3214. Therefore, in a process of disposing the anti-reflective film322on the optical lens321, the anti-reflective film322may be disposed on one of the first light transmission part3213or the second light transmission part3214first, and then the other one of the first light transmission part3213or the second light transmission part3214may be affixed to the anti-reflective film322. In this embodiment, a process of mounting the anti-reflective film322is relatively simple and is easy to perform.

In another embodiment, the optical lens321may be alternatively in an integral structure. In this case, the anti-reflective film322is disposed in the optical lens321. For example, the optical lens321is formed by using an injection molding process. Specifically, a part of the optical lens321is formed first. After cooling and molding, the anti-reflective film322is affixed to the part. Finally, the other part of the optical lens321is formed by using the injection molding process. After the other part of the optical lens321is cooled and molded, the second part32is formed. In this case, the anti-reflective film322and the optical lens321are integrated as one piece, that is, the second part32has relatively high integrity.

In an embodiment, referring toFIG.8(a), a first side surface319of the first part31is adjacent to a second side surface329of the second part32. A shape of a part, located on the first side surface319, of the beam splitter312is a first shape. A shape of a part, located on the second side surface329, of the anti-reflective film322is a second shape. The first shape matches the second shape. It can be understood that, when the first shape matches the second shape, the beam splitter312and the anti-reflective film322are connected to each other and are attached to each other face to face. In this case, ambient light entering the second part32through the first incident plane3211or ambient light entering the first part31through the third incident plane3131can pass through the anti-reflective film322or the beam splitter312only once, that is, the ambient light does not pass through the anti-reflective film322and the beam splitter312at the same time, thereby ensuring that brightness of different regions of the entire lens30is relatively uniform (it can be understood that, when the ambient light passes through a location on the anti-reflective film322or the beam splitter312more than once, brightness at the location is also reduced more than once, and in this case, brightness of the first part31or the second part32is not uniform). Therefore, the entire lens30in this embodiment has relatively good light transmission uniformity, thereby ensuring that the user does not feel uncomfortable due to a large difference in brightness of received ambient light.

In an embodiment shown inFIG.9, an edge of the anti-reflective film322is connected to an edge of the beam splitter312. In this case, the first light transmission part3213is connected to the compensating prism313, and the second light transmission part3214is connected to the free-form prism311.

It can be understood that the anti-reflective film322and the beam splitter312are spliced into a continuous film layer. In this case, ambient light entering the second part32through the first incident plane3211or ambient light entering the first part31through the third incident plane3131can pass through the anti-reflective film322or the beam splitter312only once, that is, the ambient light does not pass through the anti-reflective film322and the beam splitter312at the same time, thereby ensuring that the brightness of different regions of the entire lens30is relatively uniform. Therefore, the entire lens30in this embodiment has relatively good light transmission uniformity, thereby ensuring that the user does not feel uncomfortable due to a large difference in brightness of received ambient light.

Optionally, the anti-reflective film322is smoothly connected to the beam splitter312. In this case, because no abrupt convex or concave region appears at the junction between the anti-reflective film322and the beam splitter312, a propagation direction of ambient light that passes through the junction between the anti-reflective film322and the beam splitter312, and a propagation direction of ambient light that passes through the anti-reflective film322or the beam splitter312are not much different. Therefore, when the eyes of the user are shifted from the location of the first part31to the location of the second part32, a real world image seen by the user does not change greatly or abruptly. In this case, visual comfort of the user is relatively good.

Optionally, the first incident plane3211is smoothly connected to the third incident plane3131of the compensating prism313. In this case, no abrupt convex or concave region appears at a junction between the first incident plane3211and the third incident plane3131of the compensating prism313. Therefore, the first incident plane3211of the lens30and the third incident plane3131are relatively smooth, that is, the lens30has a more appealing appearance. In addition, because no abrupt convex or concave region appears at the junction between the first incident plane3211and the third incident plane3131, a propagation direction of ambient light that enters the lens30through the junction between the first incident plane3211and the third incident plane3131, and a propagation direction of ambient light that passes through the first incident plane3211and the third incident plane3131are not perceptively different. Therefore, when the eyes of the user are shifted from the location of the first part31to the location of the second part32, a real world image seen by the user does not change greatly or abruptly. In this case, visual comfort of the user is relatively good.

The following describes example structures of the anti-reflective film322in two implementations.

In the first implementation, the anti-reflective film322is a plating layer formed, by using a magnetron sputtering or vapor deposition process, between the first incident plane3211and the second exit plane3212.

Specifically, a plating layer is formed, through magnetron sputtering or vapor deposition, on a surface of the first light transmission part3213that faces the second light transmission part3214. Then the second light transmission part3214is bonded to the plating layer by using an optically clear adhesive. In this case, the plating layer formed between the first light transmission part3213and the second light transmission part3214is the anti-reflective film322. The formed plating layer can reduce ambient light that passes through the optical lens321, that is, the transmittance of the second part32is reduced. In another embodiment, the plating layer may be alternatively formed, through magnetron sputtering or vapor deposition, on a surface of the second light transmission part3214that faces the first light transmission part3213.

Optionally, the plating layer includes a first plating sub-layer and a second plating sub-layer laminated on the first plating sub-layer. The material of the first plating sub-layer includes silicon dioxide or magnesium fluoride. The material of the second plating sub-layer includes one of titanium oxide, neodymium oxide or zirconia. Because plating sub-layers made of different materials have different transmittances, a transmittance of the anti-reflective film322can be accurately controlled by laminating a plurality of plating sub-layers to form the anti-reflective film322.

Optionally, a thickness range of the first plating sub-layer is within a range of 70 nm to 100 nm. A thickness range of the second plating sub-layer is within a range of 2.5 nm to 60 nm. In this case, the plating layer is relatively thin, thereby facilitating thinning of the lens30.

Optionally, the plating layer is planar. In this case, the plating layer has better thickness uniformity, and a difficulty for processing the plating layer is relatively low. In another implementation, the plating layer may be curved. In this case, when the plating layer is connected to the beam splitter312, the plating layer and the beam splitter312may be spliced into a continuous curved surface.

In the second implementation, the anti-reflective film322includes one or more of a beam splitter, an absorbing film, or a polarizing film.

In this implementation, the one or more of the beam splitter, the absorbing film, or the polarizing film is directly disposed between the first light transmission part3213and the second light transmission part3214. Because the costs of the beam splitter, the absorbing film, or the polarizing film are relatively low, the costs of the formed lens30are also relatively low, that is, the costs of the head-mounted display apparatus100are also relatively low.

Optionally, the one or more of the beam splitter, the absorbing film, or the polarizing film is affixed between the first light transmission part3213and the second light transmission part3214by using an optically clear adhesive.

In addition, when the anti-reflective film322is a beam splitter, the anti-reflective film322of the second part32and the beam splitter312of the first part31are made of a same material. In this case, the light intensity of ambient light passing through the anti-reflective film322is relatively close to that of ambient light passing through the beam splitter312. In this case, the transmittance of the first part31is largely close to that of the second part32. Further, a thickness of the anti-reflective film322is the same as that of the beam splitter312of the first part31. In this case, light intensity of ambient light passing through the anti-reflective film322is the same as that of ambient light passing through the beam splitter312.

In addition, an absorbing film is a film capable of absorbing a part of ambient light. When the anti-reflective film322is an absorbing film, it may absorb a part of ambient light that enters the optical lens321, thereby reducing the light intensity of ambient light that enters the second part32. In this embodiment, an absorbing film with a specific absorptivity may be selected based on a magnitude of the transmittance of the first part31. For example, the transmittance of the first part31is 50%. In this case, an absorbing film with an absorptivity of 50% may serve as the anti-reflective film322.

In addition, a polarizing film is a film that allows a part of polarized light to pass. When the anti-reflective film322is a polarizing film, it may allow a part of ambient light that enters the optical lens321to pass, thereby reducing the intensity of ambient light that enters32. For the polarizing film in this embodiment, a corresponding polarizing film may be alternatively selected based on a magnitude of the transmittance of the first part31.

Optionally, the anti-reflective film322is a single-layer film. For example, the anti-reflective film322is one of a beam splitter, an absorbing film, or a polarizing film.

In some cases, the anti-reflective film322may alternatively be a multi-layer film. For example, the anti-reflective film322includes a beam splitter and an absorbing film that are stacked, or an absorbing film and a polarizing film that are stacked. Because different types of film layers have different transmittances, the anti-reflective film322may be constructed as a multi-layer film, so that the transmittance of the second part32can be controlled more flexibly, and the transmittance of the second part32is more likely to be close to that of the first part31.

The foregoing specifically describes the first embodiment, in which the anti-reflective film322is disposed in the second part32to reduce the transmittance of the second part32. The following describes the second embodiment with reference toFIG.10andFIG.11, in which the color masterbatch324is disposed in the substrate323of the second part32to reduce the transmittance of the second part32. Technical content in the second embodiment that is the same as that in the first embodiment is not described in detail again.FIG.10is a schematic structural diagram of still another implementation of the lens30of the head-mounted display apparatus100shown inFIG.1.FIG.11is a schematic cross-sectional view of the lens30shown inFIG.10at B-B.

Referring toFIG.10andFIG.11, the second part32includes the substrate323and the color masterbatch324mixed in the substrate323. In this embodiment, the first body part326includes the substrate323and the color masterbatch324mixed in the substrate323. For a structural layout of the second body part327, refer to the layout of the first body part326. It can be understood that the masterbatch324is a plastic colorant obtained by well dispersing a pigment and a thermoplastic resin. For example, the pigment may be, but is not limited to, titanium dioxide, carbon black, or iron oxide red. In another embodiment, color masterbatch powder or another colorant may be alternatively mixed in the substrate323.

In this embodiment, the color masterbatch324is disposed in the substrate323of the second part32, to reduce the transmittance of the second part32. In this case, when the eyes of the user move and shifts from directly facing the first part31to directly facing the second part32, the user does not feel uncomfortable because of a large difference in brightness of received ambient light, thereby improving user experience of the head-mounted display apparatus100in this embodiment.

In addition, a manner of fabricating the second part32is simple and is easy to perform. In addition, transmittances of all regions of the second part32are relatively uniform.

Optionally, the second part32is formed through a dyeing process. Specifically, the color masterbatch324is evenly mixed in a resin (for example, polyamide (polyamide, PA) or polycarbonate (polycarbonate, PC)). Then the evenly mixed resin is molded through injection molding, that is, a form of the second part32is preliminarily formed. For example, a resin to which a color masterbatch324is added and that is melted through heating is injected into a mold, and a molded lens30is obtained after cooling.

In addition, a composition proportion of the color masterbatch324in the resin may be adjusted based on the transmittance of the first part31, to make the transmittance of the second part32equal to that of the first part31.

Optionally, the substrate323and the compensating prism313are made of a same material. In this case, a refractive index of the substrate323is the same as that of the compensating prism313. Therefore, a real world image seen by the user through the first part31and a real world image seen through the second part32can be spliced into an integrated real world image. In this case, visual comfort of the user is relatively good. In other words, when the refractive index of the substrate323is different from that of the compensating prism313, a real world image seen by the user through the first part31and a real world image seen through the second part32cannot be spliced into an integrated real world image due to different imaging angles or different imaging powers. In this case, when the eyes of the user are shifted from the location of the first part31to the location of the second part32, the image seen by the user changes greatly or abruptly. In this case, visual comfort of the user is relatively poor.

The foregoing describes in detail the embodiments of the second part32with a first structure. The following describes a second structure of the second part32with reference to FIG.12,FIG.13, andFIG.14. Most technical content in embodiments of the second part32with the second structure is the same as that in the embodiments of the second part32with the first structure, and is not described in detail again.FIG.12is a schematic structural diagram of still another implementation of the lens30of the head-mounted display apparatus100shown inFIG.1.FIG.13is a schematic cross-sectional view of the lens30shown inFIG.12at a line C-C.FIG.14is a schematic structural diagram of still another implementation of the lens30of the head-mounted display apparatus100shown inFIG.1.

Referring toFIG.12andFIG.13, the second part32further includes a third body part328. The third body part328is connected between the first body part326and the second body part327, and the third body part328is adjacent to the first exit plane3113of the first part31. It can be understood that the first exit plane3113of the first part31is a surface on which the display light and the ambient light exit from the first part31.

In referring toFIG.13, one end of the third body part328is connected to a surface of the first body part326that faces the first part31, and the other end is connected to a surface of the second body part327that faces the first part31. Connection relationships between the third body part328and the first body part326, and between the third body part328and the second body part327are not limited to those shown inFIG.13. The connection relationships between the third body part328and the first body part326, and between the third body part328and the second body part327may be alternatively a structure shown inFIG.14. Refer to the following descriptions.

In this embodiment, when the first body part326and the second body part327are fixed to two sides of the first part31, and the third body part328is located on a light exit side of the first part31, the first body part326, the second body part327, and the third body part328surround a periphery of the first part31. In this case, the first body part326, the second body part327, and the third body part328can effectively protect the first part31, to avoid damage to the first part31due to collision with another device.

In addition, when the first body part326, the second body part327, and the third body part328surround the first part31, the first body part326, the second body part327, and the third body part328are relatively highly integrated with the first part31. In this case, the lens30also has relatively high structural strength.

Optionally, the third body part327is fastened to the first body part326and the second body part327by using an optically clear adhesive. Further, the third body part327is fastened to the first part31by using an optically clear adhesive.

Optionally, the third body part327, the first body part326, and the second body part327are made of a same material.

As shown inFIG.13, when the first part31includes the free-form prism311, the beam splitter312, and the compensating prism313that are sequentially stacked, the third body part328is fastened to the first exit plane3113(refer to the first exit plane3113inFIG.3) of the free-form prism311. In this case, the first body part326, the second body part327, and the third body part328are located at a periphery of the free-form prism311, the beam splitter312, and the compensating prism313that are stacked.

Optionally, the third body part328, the first body part326, and the second body part327are integrally molded. In this case, the second part32has relatively high integrity. In addition, compared with a method for separately fabricating the first body part326, the second body part327, and the third body part328, and then splicing the first body part326, the second body part327, and the third body part328into the second part32, in this embodiment, the third body part328, the first body part326, and the second body part327are integrally molded, thereby simplifying a fabrication process for the second part32and further reducing the costs of the second part32.

It can be understood that, for structural layouts of the first body part326and the second body part327in this embodiment, reference may be made to the structural layouts of the first body part326and the second body part327in the foregoing embodiment (for example, the anti-reflective film322is disposed in the first body part326to reduce the transmittance of the second part32, or the color masterbatch324is disposed in the substrate323of the first body part326to reduce the transmittance of the second part32). Details are not described herein again.

As shown inFIG.14, technical content that is the same as that in the foregoing embodiment is not described in detail again: One end of the third body part328is connected to the second exit plane3212of the first body part326, and the other end is connected to the second exit plane3212of the second body part327.

Optionally, in a process of forming the lens30through assembly, the free-form prism311, the beam splitter312, and the compensating prism313of the first part31may be sequentially stacked on the third body part328first. The first body part326and the second body part327are spliced around the first part31, and are fastened to a surface of the third body part328that faces the first part31.

The foregoing describes the second part32with the second structure. The following specifically describes a third structure of the second part32with reference toFIG.15(a)andFIG.15(b)toFIG.17.FIG.15(a)andFIG.15(b)are a schematic structural diagram of still another implementation of the lens30of the head-mounted display apparatus100shown inFIG.1.FIG.15(a)is a schematic diagram of the lens30from a particular perspective.FIG.15(b)is a schematic diagram of the lens30from another perspective.FIG.16is a partial schematic exploded view of the lens shown inFIG.15(a)andFIG.15(b).FIG.17is a diagram of light propagation paths when the lens30shown inFIG.15(a)andFIG.15(b)cooperates with the display module20.

Referring toFIG.15(a)andFIG.15(b)andFIG.16, the second part32is a ring-shaped structure. The second part32has an accommodation space325. The first part31is disposed in the accommodation space325. It can be understood that,FIG.16illustrates that the accommodation space325is formed by splicing a first space3251, a second space3252, and a third space3253. However, the accommodation space325may be alternatively formed by an integral space.

In addition, the second part32includes a first incident plane3211and a second exit plane3212that are opposite to each other. The accommodation space325extends from the first incident plane3211to the second exit plane3212. When the first part31is disposed in the accommodation space325, the first part31is fastened to a side wall of the accommodation space325, that is, the second part32surrounds a peripheral side surface of the first part31.

In this embodiment, when the first part31is disposed in the accommodation space325, the second part32surrounds the peripheral side surface of the first part31. In this case, the second part32can effectively protect the first part31, to avoid damage to the first part31due to collision with another device.

In addition, when the second part32surrounds the peripheral side surface of the first part31, the second part32is relatively highly integrated with the first part31. In this case, the lens30also has relatively high structural strength.

It can be understood that the second part32is configured with a ring-shaped structure, thereby facilitating assembly of the first part31and the second part32. In addition, a connection area of the first part31and the second part32is relatively large, so that the connection between the first part31and the second part32is more secure, that is, the first part31is not likely to detach from the second part32.

In addition, in some cases, for a first part31with a relatively small optical index (for example, a first part31whose exit pupil area (also referred to as an eyebox) has a relatively small area, or a first part with a relatively small field of view (FOV)), the first part31is assembled on the second part32with the ring-shaped structure, so that areas of the first part31in all directions can be significantly increased, thereby significantly increasing an area of the lens30. In this case, the user has a relatively wide field of vision and relatively good visual comfort.

In addition, in some cases, when an optical index of the free-form prism311is determined, the second part32can also be disposed in the foregoing structure. To be specific, when a volume of the free-form prism311is determined, the free-form prism311is assembled on the second part32with the ring-shaped structure, so that the areas of the free-form prism311in different directions can be significantly increased, thereby significantly increasing an area of the lens30. In this case, the user has a relatively wide field of vision and relatively good visual comfort.

In this implementation, ambient light enters the second part32through the first incident plane3211, and exits from the second part32through the second exit plane3212, that is, the user can see a real world through the second part32.

In addition, as shown inFIG.15(a)andFIG.15(b), the second part32includes a second incident plane3219. The second incident plane3219is connected between the first incident plane3211and the second exit plane312. The second incident plane3219is configured to enable display light emitted by the display module20(refer toFIG.17) to enter the second part32and enter the first part31through the second part32.

As shown inFIG.17, after the display module20emits the display light, the display light enters the second part32through the second incident plane3219. The display light that enters the second part32exits from the second part32, and enters the free-form prism311through the second incident plane3111of the free-form prism311. In this case, a part of the display light propagates to the beam splitter312through reflection by the first exit plane3113. This part of display light is then reflected by the beam splitter312, exits from the first exit plane3113, and is projected onto the eyes of the user. In this case, the user can receive a virtual image transmitted by the display module20. In addition, ambient light enters the compensating prism313through the third incident plane3131of the compensating prism313. In this case, the ambient light sequentially passes through the compensating prism313and the beam splitter312and propagates to the first incident plane3112, and enters the free-form prism311through the first incident plane3112. The ambient light that enters the free-form prism311exits from the first exit plane3113, and is projected onto the eyes of the user. In this case, the user can receive the ambient light, that is, the user can see a real world. Therefore, the user can see, through the first part31, a composite image combining a real image and a virtual image.

As shown inFIG.16, the first part31includes the free-form prism311, the beam splitter312, and the compensating prism313that are sequentially stacked. In this case, the free-form prism311, the beam splitter312, and the compensating prism313are accommodated in the accommodation space325. It can be understood that a manner of disposing the free-form prism311, the beam splitter312, and the compensating prism313may be the same as that of disposing the free-form prism311, the beam splitter312, and the compensating prism313in the embodiment of the second part32with the first structure. Details are not described herein.

As shown inFIG.16, the second part32includes an optical lens321and the anti-reflective film322. It can be understood that both the optical lens321and the anti-reflective film322are ring-shaped. In addition, for a manner of disposing the optical lens321and the anti-reflective film322, refer to the manner of disposing the optical lens321and the anti-reflective film322of the second part32with the first structure. For example, the optical lens321includes a first light transmission part3213and a second light transmission part3214that face each other. The anti-reflective film322is disposed between the first light transmission part3213and the second light transmission part3214. A difference from the foregoing embodiment lies in that the first light transmission part3213, the second light transmission part3214, and the anti-reflective film322are all in a ring-shaped structure. In this case, the first light transmission part3213is provided with the first space3251. The anti-reflective film322is provided with the second space3252. The second light transmission part3214is provided with the third space3253. The first space3251, the second space3252, and the third space3253are spliced into the accommodation space325. In addition, for the second part32, reference may be alternatively made to the first structure in which the color masterbatch324is disposed in the substrate323of the second part32to reduce the transmittance of the second part32.

The foregoing describes example structures of the head-mounted display apparatus100. The following describes yet another structure of the head-mounted display apparatus100with reference toFIG.18. Technical content that is the same as that of the head-mounted display apparatus100with the first structure is not described in detail again.FIG.18is a schematic structural diagram of another implementation of the head-mounted display apparatus100according to an embodiment of this application.

Specifically, the head-mounted display apparatus100may further include an iris camera40. The iris camera40is mounted on the lens frame10. Optionally, the iris camera40is mounted on the frame11. For example, the iris camera40may be, but is not limited to, an infrared camera. The iris camera40may obtain iris location change information of a user, and convert the iris location change information into coordinate information for the display module20. There may be one iris camera40configured to detect iris location change information of one eye of the user. Certainly, there may be alternatively two iris cameras40, configured to detect iris location change information of both eyes at the same time. In this case, iris location data collected by the two iris cameras40may supplement each other or may be corrected with reference to each other. It can be understood that the iris camera40collects the iris location change information of the user, so that the user can see different virtual images in different regions. For example, when the user directly looks at the lens30at a first moment, the user may see a weapon and a character in a first region. When an eye of the user moves, the iris camera40collects iris location change information of the eye, and converts the iris location change information into coordinate change information for the display module20. In this case, when the user looks left at the lens30at a second moment, the user may see another weapon or another character in a second region.

Still referring toFIG.18, the head-mounted display apparatus100may further include a structured light module50. The structured light module50is mounted in the lens frame10. The structured light module50may be configured to scan the face of the user, and obtain feature information of the face of the user. In this case, the feature information of the face is compared with preset face information. When a comparison result indicates that the obtained feature information is consistent with the preset face information, the head-mounted display apparatus100is turned on. When a comparison result indicates that the obtained feature information is inconsistent with the preset face information, the head-mounted display apparatus100is not turned on. In addition, the structured light module50may be further configured to cooperate with the display module20to implement virtual shopping. For example, when the user needs to purchase a new weapon, the display module20provides a shopping list of virtual objects for the user. In this case, the feature information obtained by the structured light module50may be used to confirm whether the user is to purchase a weapon.

In another implementation, the head-mounted display apparatus100may further include an earpiece, a microphone, and a wireless charging apparatus. The earpiece and the microphone are mounted in the lens frame10. In this case, the user may listen to voice information from another user by using the earpiece, for example, listen to combat information from a teammate. Voice information may be input by using the microphone. In this case, the user may operate a virtual interface of the display module20by using the voice information. In addition, the head-mounted display apparatus100may be wirelessly charged by using the wireless charging apparatus.

The foregoing descriptions are merely specific implementations of the present invention, but are not intended to limit the protection scope of the present invention. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.