Head-mounted display device

Abstract

The present application provides a head-mounted display device, which includes a display, a light guide assembly, a first image capturer, and a shutter. The display periodically provides a display image and a setting image. The light guide assembly generates a projection image according to the display image and the setting image at different times. The first image capturer periodically captures a target area image of a target area. The shutter is periodically disabled and enabled. When the display provides the setting image, the shutter is enabled, and the first image capturer captures the target area image. When the display provides the display image, the shutter is disabled, and the first image capturer stops capturing the target area image.

Description

[0001] This invention is a divisional application of the invention patent application filed on December 3, 2020, with application number 202011406123.7 and invention title "Head-mounted Display Device". Technical Field

[0002] This invention relates to a head-mounted display device, and more particularly to a head-mounted display device that provides privacy or social mode applications. Background Technology

[0003] In the realm of common knowledge, augmented reality head-mounted display devices, due to the double-sided light-emitting characteristics of their light guide components, project the displayed image onto the outside of the head-mounted display device, allowing external viewers to read the confidential information viewed by the wearer.

[0004] On the other hand, it is common knowledge that when using head-mounted display devices, external viewers cannot clearly see the user's facial expressions. Therefore, it is also difficult for external viewers to engage in social interaction with the user.

[0005] In addition, in the commonly known driving method, the light shield adjusts different transmittance settings by controlling the voltage, but the uniformity of its viewing angle will vary under different voltage settings, resulting in uneven display. Summary of the Invention

[0006] This invention is applicable to various head-mounted display devices and can provide display effects in either a privacy mode or a social mode.

[0007] According to an embodiment of the present invention, a head-mounted display device includes a display, a light guide assembly, a first image capture device, and a light shield. The display periodically and alternately provides a display image and a setting image. The light guide assembly is coupled to the display and generates a projected image based on the display image and the setting image in a time-division multiplexing manner. The first image capture device is used to periodically capture an image of a target area. The light shield is disposed between the light guide assembly and the target area, and the light shield is periodically and alternately disabled and enabled. When the display provides the setting image, the light shield is enabled, and the first image capture device captures the image of the target area. When the display provides the display image, the light shield is disabled, and the first image capture device stops capturing the image of the target area.

[0008] Based on the above, this invention, through the periodic alternating disabling and enabling actions of the light-blocking device, in conjunction with the timing of the display image generation, allows the user's image on the head-mounted display device to be either invisible to external parties or visible to external parties. Thus, the head-mounted display device can be used in privacy mode or social mode, improving usability. Attached Figure Description

[0009] The accompanying drawings are included to further illustrate the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0010] Figure 1 A schematic diagram of a head-mounted display device according to an embodiment of the present invention is shown;

[0011] Figure 2 This invention is shown Figure 1 Operation timing diagram of the head-mounted display device in the embodiment;

[0012] Figure 3 A schematic diagram of a head-mounted display device and its optical path according to another embodiment of the present invention is shown;

[0013] Figures 4A to 5B A schematic diagram of the optical path of a head-mounted display device according to several embodiments of the present invention is shown;

[0014] Figure 6 A schematic diagram of a head-mounted display device 600 according to another embodiment of the present invention is shown;

[0015] Figure 7 This invention is shown Figure 6 A schematic diagram of the operation flow of the head-mounted display device in the embodiment;

[0016] Figure 8A , Figure 8B A schematic diagram showing the user's eye view according to an embodiment of the present invention;

[0017] Figure 9 This invention is shown Figure 6 Timing diagram of the operation of the head-mounted display device in the embodiment.

[0018] Explanation of reference numerals in the attached figures

[0019] 100, 300, 400, 500, 501, 502, 600: Head-mounted display devices;

[0020] 110, 310, 410, 510, 51, 51-1, 51-2, 610: Monitors;

[0021] 120, 320, 420, 520, 52a, 52b, 620: Light guide components;

[0022] 130, 330, 430, 530, 53, 640: Sunshades;

[0023] 431, 531, 57: P-axis polarizers;

[0024] 432, 532, 54: S-axis polarizers;

[0025] 450, 550, 560, 55, 56, 59: Phase delay film;

[0026] 570: Linear polarizer;

[0027] 630, 670: Image capture unit;

[0028] 650: Electronically controlled lens;

[0029] 660: Electrically controlled light diffuser;

[0030] 680: Processor;

[0031] 810, 820: Eye image;

[0032] AMBL, AMBL1, AMBL2: Ambient light;

[0033] CTR1: Control signal;

[0034] FN1~FNN: Time interval of the image frame;

[0035] IMG, CIMG: Display images;

[0036] LCP, RCP: Circularly polarized light;

[0037] LD: Light Emitting Diode;

[0038] PGL1, PGL2, PG: Projected images;

[0039] S711~S730: Procedures;

[0040] SETI: Setting Image;

[0041] SF1~SF4: Surface;

[0042] SYNC: Synchronization signal;

[0043] t1, t2: Time intervals;

[0044] TG: Target area;

[0045] TGIMG: Image of the target area;

[0046] VR1: Eye Imaging. Detailed Implementation

[0047] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0048] Please refer to Figure 1 , Figure 1This diagram illustrates a head-mounted display device according to an embodiment of the present invention. The head-mounted display device 100 includes a display 110, a light guide assembly 120, and a shutter 130. The display 110 generates a display image IMG according to a default cycle. The light guide assembly 120 is coupled to the display 110. The light guide assembly 120 receives the display image IMG generated by the display 110 and generates the same projected images PGL1 and PGL2 based on the display image IMG. The light guide assembly 120 also emits the projected image PGL1 to a target area TG through its first surface SF1 and the projected image PGL2 to the shutter 130 through its second surface SF2. The first surface SF1 and the second surface SF2 are opposite to each other.

[0049] On the other hand, the light shield 130 is adjacent to and coupled to the second surface SF2 of the light guide assembly 120. The light shield 130 can be periodically and alternately disabled and enabled.

[0050] In this embodiment, the surface SF3 of the light shield 130 facing the exterior of the head-mounted display device 100 can receive ambient light (AMBL). The surface SF4 of the light shield 130 facing the light guide assembly 130 can receive the projected image (PGL2). In this embodiment, the light shield 130 is an electrically controlled light shield, which can be disabled or enabled according to an electrical control signal CTR1. When the light shield 130 is enabled according to the control signal CTR1, the ambient light (AMBL) will be blocked and cannot be transmitted to the light guide assembly 120. Conversely, when the light shield 130 is disabled according to the control signal CTR1, the ambient light (AMBL) can pass through the light shield 130 and be transmitted to the light guide assembly 120.

[0051] Please note that when the display 110 generates the display image IMG, the light shield 130 is simultaneously enabled according to the control signal CTR1. As a result, the projected image PGL2 generated by the light guide assembly 120 corresponding to the display image IMG is blocked by the light shield 130 and cannot be transmitted to the outside of the head-mounted display device 100. Simultaneously, the projected image PGL1 generated by the light guide assembly 120 can be effectively transmitted to the target area TG (i.e., the position of the user's eyeball). At this time, the user can observe the display image IMG generated by the display 110.

[0052] Conversely, when the display 110 stops generating the display image IMG, the light blocker 130 is synchronously disabled according to the control signal CTR1. At this time, the display 110 stops generating the display image IMG. And the ambient light AMBL can be transmitted to the light guide assembly 120 through the disabled light blocker 130 and then to the target area TG. At this time, the user can observe the environmental image transmitted by the external ambient light AMBL.

[0053] As explained above, by periodically enabling and disabling the light-blocking device 130 and causing the display 110 to generate display images (IMGs) in an alternating manner, users can observe the display effects of virtual reality and / or augmented reality. Furthermore, the display images (IMGs) and the user's image (target area image) are not transmitted to the outside of the head-mounted display device 100, achieving a privacy mode effect.

[0054] Please refer to the following: Figure 2 , Figure 2 This invention is shown Figure 1 The following is a timing diagram of the operation of the head-mounted display device according to the embodiment. The head-mounted display device 100 can distinguish its operation timing into multiple frame time intervals FN1 to FNN based on the synchronization signal SYNC. Within a single frame time interval (taking frame time interval FN1 as an example), when the synchronization signal SYNC is at a relatively high level, the light-blocking device 130 can be enabled, and the display 110 can generate the display image IMG according to pulsed driving. Conversely, within frame time interval FN1, when the synchronization signal SYNC is at a relatively low level, the light-blocking device 130 can be disabled, and the display 110 stops generating the display image IMG.

[0055] Incidentally, the duty cycle of the SYNC signal can be dynamically adjusted without any other limitations. For example, when it is necessary to increase the brightness of the displayed image (IMG), the duration of the positive pulse of the SYNC signal can be increased. Conversely, when it is necessary to increase the brightness of the ambient image, the duration of the positive pulse of the SYNC signal can be decreased.

[0056] Incidentally, the shade 130 in this embodiment operates periodically between fully open and fully closed, effectively improving the uniformity of the user's field of view.

[0057] Please refer to the following: Figure 3 , Figure 3 A schematic diagram of a head-mounted display device and its optical path according to another embodiment of the present invention is shown. The head-mounted display device 300 includes a display 310, a light guide assembly 320, and a light shield 330. In this embodiment, the light guide assembly 320 can be a polarization-sensitive light guide assembly, and the light shield 330 can be an electrically controlled liquid crystal light shield.

[0058] The display 310 in the head-mounted display device 300 can provide a display image IMG of second-direction linearly polarized light (e.g., S-light). After the S-light display image IMG is transmitted to the light guide assembly 320, the light guide assembly 120 can generate projection images PGL1 and PGL2 of first-direction polarized light (P-light) based on the S-light display image IMG. Projection image PGL1 is projected onto the target area TG, and projection image PGL2 is projected onto the light shield 330. The light shield 330 can also block the P-light projection image PGL2 and prevent the projection image PGL2 from being transmitted to the outside of the head-mounted display device 300, achieving a privacy mode effect.

[0059] On the other hand, ambient light AMBL having a first polarized light component (P-light) and a second polarized light component (S-light) is projected onto light shield 330. Light shield 130 can block the S-light component of ambient light AMBL while retaining the P-light component of ambient light AMBL for transmission to light guide assembly 320. Light guide assembly 320 can then transmit the P-light component of ambient light AMBL to target area TG to generate an environmental image.

[0060] Please refer to Figure 4A , Figure 4A This diagram illustrates a head-mounted display device and its optical path according to another embodiment of the present invention. The head-mounted display device 400 includes a display 410, a light guide assembly 420, a light shield 430, an S-direction (second direction) polarizer 432, a P-direction (first direction) polarizer 431, and a phase retardation film 450. The light guide assembly 420 can be a polarization-sensitive light guide assembly, and the light shield 430 can be an electrically controlled liquid crystal light shield. In this embodiment, the S-direction polarizer 432 and the P-direction polarizer 431 are respectively disposed on both sides of the light shield 430. The P-direction polarizer 431 is disposed between the light shield 430 and the phase retardation film 450. The phase retardation film 450 is disposed between the P-direction polarizer 431 and the light guide assembly 420. The light guide assembly 420 is disposed adjacent to the target region TG.

[0061] In this embodiment, the display 410 provides a display image IMG of a first circularly polarized light (LCP) to the light guide assembly 420. The light guide assembly 420 generates projection images PGL1 and PGL2 of a second circularly polarized light (RCP) based on the display image IMG of the first circularly polarized light (LCP). Projection image PGL1 is transmitted to the target area TG, and projection image PGL2 is transmitted to the phase retardation plate 450. In this embodiment, the phase retardation plate 450 is a quarter-wave plate (QWP), which delays the received light wave by 1 / 4 wavelength. The phase retardation plate 450 can then be converted into a projection image PGL2 of P-beam for the second circularly polarized light (RCP).

[0062] Continuing from the above, the projected image PGL2 of P-light is projected onto the P-polarizer 431, and its transmission can be controlled by the light shield 430. Therefore, the light shield 430 can control the projected image PGL2 from being transmitted to the outside of the head-mounted display device 400, achieving the effect of privacy mode.

[0063] On the other hand, ambient light AMBL having a first polarized light (P-light) component and a second polarized light (S-light) component is projected onto an S-direction polarizer 432. Through the S-direction polarizer 432 and the P-direction polarizer 431, the second polarized light (S-light) component of the ambient light AMBL can be filtered out, and the first polarized light (P-light) of the ambient light AMBL can be transmitted to the phase retardation film 450.

[0064] A phase delay film 450 converts the first direction-polarized light (P-light) of the ambient light AMBL to generate a second direction-polarized light (RCP) of the ambient light AMBL. The second direction-polarized light (RCP) of the ambient light AMBL is projected onto a light guide assembly 420, which can transmit the second direction-polarized light (RCP) of the ambient light AMBL to the target area TG.

[0065] Please refer to Figure 4B , Figure 4B A schematic diagram of the optical path of a head-mounted display device according to another embodiment of the present invention is shown. The head-mounted display device 500 includes a display 510, a light guide assembly 520, a light shield 530, an S-direction (second direction) polarizer 532, a P-direction (first direction) polarizer 531, phase retardation films 550 and 560, and a linear polarizer 570. The light guide assembly 520 can be a polarization-sensitive light guide assembly, and the light shield 530 can be an electrically controlled liquid crystal light shield.

[0066] In this embodiment, the S-axis polarizer 532 and the P-axis polarizer 531 are respectively disposed on two opposite sides of the light shield 530. The P-axis polarizer 531 is oriented towards the target region TG. A phase retardation film 550, a light guide assembly 520, a phase retardation film 560, and a linear polarizer 570 are sequentially disposed between the P-axis polarizer 531 and the target region TG. The display 510 provides a display image IMG of first circularly polarized light (LCP) to the light guide assembly 520. The light guide assembly 520 generates a display image IMG of second circularly polarized light (RCP) based on the display image IMG of the first circularly polarized light (LCP). The light guide assembly 520 transmits the display image IMG of the second circularly polarized light (RCP) to the phase retardation films 550 and 560.

[0067] In this embodiment, phase retarders 550 and 560 are both quarter-wave plates. Phase retarder 550 can convert a display image IMG of second-direction circularly polarized light (RCP) into a display image IMG of first-direction polarized light (P-light). The display image IMG of first-direction polarized light (P-light) is then transmitted to P-direction polarizer 531. By controlling the opening and closing of light shield 530, it is prevented from being transmitted to the outside of the head-mounted display device 500, thereby achieving the effect of privacy mode.

[0068] On the other hand, the phase retardation film 560 can convert a display image IMG of second-direction circularly polarized light (RCP) into a display image IMG of first-direction polarized light (P-light), and transmit the display image IMG of first-direction polarized light (P-light) to the linear polarizer 570. Through the linear polarizer 570, the display image IMG of first-direction polarized light (P-light) can be transmitted to the target area TG.

[0069] In this embodiment of the invention, the S-direction polarizer 532 can receive ambient light AMBL1 having a first direction polarized light (P-light) component and a second direction polarized light (S-light) component. Through the action of the S-direction polarizer 532, the light blocker 530, and the P-direction polarizer 531, the S-light component in the ambient light AMBL1 can be filtered out, and the P-light component in the ambient light AMBL1 is transmitted to the phase retarder 550. The phase retarder 550 then converts the P-light component in the ambient light AMBL1 into ambient light AMBL1 with second direction circularly polarized light (RCP). The light guide assembly 520 receives the ambient light AMBL1 with second direction circularly polarized light (RCP) and transmits the ambient light AMBL1 with second direction circularly polarized light (RCP) to the phase retarder 560.

[0070] Phase delay film 560 converts ambient light AMBL1, which is second-direction circularly polarized light (RCP), into P-beam ambient light AMBL1. The P-beam ambient light AMBL1 is then provided to linear polarizer 570 and transmitted to target region TG through linear polarizer 570.

[0071] Furthermore, in this embodiment, the linear polarizer 570 can receive ambient light AMBL2 with a first direction polarized light (P-light) component and a second direction polarized light (S-light) component in another direction. The linear polarizer 570 can shield the S-light component of the ambient light AMBL2. The phase retarder 560 is used to convert the P-light component of the ambient light AMBL2 into second-direction circularly polarized (RCP) ambient light AMBL2. The light guide assembly 520 transmits the ambient light AMBL2 converted to second-direction circularly polarized (RCP) ambient light to the phase retarder 550. The phase retarder 550 then converts the second-direction circularly polarized (RCP) ambient light AMBL2 into P-light ambient light AMBL2.

[0072] Under the action of the S-direction polarizer 532, the P-light ambient light AMBL2 is converted into the S-light ambient light AMBL2 and transmitted to the outside of the head-mounted display device 500.

[0073] Please refer to the following: Figure 5A as well as Figure 5B , Figure 5A , 5B Two other embodiments of the head-mounted display device of the present invention and their optical path schematic diagrams are shown respectively. Figure 5A In this embodiment, the head-mounted display device 501 includes a display 51, sub-light guide components 52a and 52b, a light shield 53, an S-direction (second direction) polarizer 54, a P-direction (first direction) polarizer 57, phase retarders 55, 56, and 59, and a beam splitter 58. Specifically, the light guide components in this embodiment are divided into sub-light guide components 52a and 52b. Sub-light guide components 52a and 52b are sequentially arranged between the light shield 53 and the target area TG. The S-direction polarizer 54 is disposed between the light shield 53 and the sub-light guide component 52a. The phase retarder 56 and the P-direction polarizer 57 are sequentially disposed between the sub-light guide components 52a and 52b. The S-direction polarizer 54 receives ambient light AMBL having both P- and S-wave components and, in conjunction with the phase retarder (1 / 4 wave plate), generates ambient light AMBL1 as second-direction circularly polarized light (RCP).

[0074] Ambient light AMBL1 is transmitted to sub-light guide assembly 52a. Sub-light guide assembly 52a conducts ambient light AMBL1 and converts it into first-direction circularly polarized light (LCP), and transmits the ambient light AMBL1 as first-direction circularly polarized light (LCP) to phase retardation film 59. Phase retardation film 59 then converts ambient light AMBL1 into S-beam and transmits the S-beam ambient light AMBL1 to beam splitter assembly 58. The phase retardation film 59 and the beam splitter assembly 58 are arranged adjacent to the surface of the beam splitter assembly 58 that receives ambient light AMBL1. Beam splitter assembly 58 then transmits the S-beam ambient light AMBL1 to display 51. In this embodiment, display 51 can be a liquid crystal on silicon (LCD) display.

[0075] Additionally, the display 51 can transmit a display image CIMG of P-beam to the beam splitter 58. The beam splitter 58 forwards the P-beam display image CIMG to the phase retardation film 59, which converts the P-beam display image CIMG into a second-direction circularly polarized (RCP) display image CIMG and transmits the second-direction circularly polarized (RCP) display image CIMG to the sub-light guide assembly 52b. Through the light guiding effect of the sub-light guide assembly 52b, the display image CIMG can be transmitted to the target area TG. The display image CIMG transmitted in the sub-light guide assembly 52b can be first-direction circularly polarized (LCP), while the display image CIMG transmitted to the target area TG can be second-direction circularly polarized (RCP).

[0076] Please note that in this embodiment, the displayed image CIMG may include an ambient light image formed by ambient light AMBL1, providing users with an augmented reality display effect. Furthermore, in this embodiment, the image of the target area TG will not be seen by users outside the head-mounted display device 5A, thus achieving a privacy mode effect.

[0077] In addition, Figure 5B In, with Figure 5A Different Figure 5B The head-mounted display device 502 has two separately configured displays 51-1 and 51-2. The position of display 51-1 can be... Figure 5A The display 51 is the same. The display 51-2 can be arranged adjacent to another surface of the beam splitter 58. The display image sent by the display 51-2 can directly pass through the beam splitter 58 and then be transmitted to the sub-light guide assembly 52b through the phase delay film 59.

[0078] Incidentally, in Figure 5A , Figure 5B In one embodiment, the light-emitting diode (LD) can be used to project a light beam onto the user's eye during eye-tracking.

[0079] Please refer to the following: Figure 6 , Figure 6 A schematic diagram of a head-mounted display device 600 according to another embodiment of the present invention is shown. The head-mounted display device 600 includes a display 610, a light guide assembly 620, image capture units 630 and 670, a light shield 640, an electrically controlled lens 650, an electrically controlled light diffuser 660, and a processor 680. The display 610 can periodically and alternately provide a display image IMG and a setting image SETI. The light guide assembly 620 is coupled to the display 610. The light guide assembly 620 generates a projected image PG based on the display image IMG and the setting image SETI in a time-division multiplexing manner. The projected image PG1 is projected onto the electrically controlled lens 650.

[0080] Additionally, a light-blocking device 640 is positioned between the light guide assembly 620 and the target area TG. The light-blocking device 640 is periodically and alternately disabled and enabled. When the light-blocking device 640 is enabled, light cannot pass through it; when the light-blocking device 640 is disabled, light can pass through it.

[0081] Image capturer 630 can be used to periodically capture target area image TGIMG of target area TG. When target area TG corresponds to the position of user's eye, target area image TGIMG can be the image of user's eye. Image capturer 630 is coupled to processor 680 and transmits target area image TGIMG to processor 680. Target area image TGIMG can be used as a setting image SETI. In this embodiment of the invention, setting image SETI can also be other default images.

[0082] In terms of operational details, when the display 610 provides the setting image SETI, the light shield 640 is enabled. Simultaneously, the image capture unit 630 captures the target area image TGIMG. When the display 610 provides the display image IMG, the light shield 640 is disabled, and the image capture unit 630 stops capturing the target area image TGIMG.

[0083] In another embodiment of the invention, the image capturer 670 can be used to capture the eye image VR1 of the opposing character and use it as the eye tracking information ETI of the opposing character. The processor 680 obtains the gaze direction of the opposing character based on the eye tracking information ETI, and causes the display 610 to provide a setting image SETI based on the gaze direction.

[0084] On the other hand, the electronically controlled lens 650 and the electronically controlled light diffuser 660 can adjust the size of the projected image PG provided by the light guide assembly 620 and transmit the projected image PG to the opposing character, thus achieving the effect of a social mode.

[0085] The processor 680 in this embodiment can be implemented using any processor with computing power that is well known to those skilled in the art, without any fixed limitations.

[0086] You can refer to this simultaneously. Figure 6 as well as Figure 7 ,in Figure 7 This invention is shown Figure 6A schematic diagram of the operation flow of the head-mounted display device in this embodiment. In step S711, the image capturer 630 captures the user's eye view. In step S712, the image capturer 670 tracks the gaze direction of the target character. Furthermore, in step S720, the processor 680 analyzes the gaze direction of the target character and provides a better view of the user's eyes accordingly. Finally, in step S730, the display 610 provides the user's eye view for the target character to view, achieving a social mode effect.

[0087] Please see here. Figure 8A , Figure 8B This diagram illustrates a user's eye view according to an embodiment of the present invention. When the direction of the user's gaze is determined to be direct towards the user, the following can be generated: Figure 8A The image shown is a frontal view of the user's eyes (810). Additionally, if the user's gaze direction is determined to be that of a user looking sideways (obliquely), then the following can be generated: Figure 8B The image shown is of the user's eyes facing forward (820).

[0088] Please refer to the following: Figure 9 , Figure 9 This invention is shown Figure 6 The following is a timing diagram of the operation of the head-mounted display device in this embodiment. The operation timing of the head-mounted display device 600 can be divided into multiple consecutive image frame cycles FN1 and FN2. In image frame cycle FN1, the display 610 can first provide a setting image SETI in time interval t1, and then provide a display image IMG in time interval t2. Correspondingly, in time interval t1, the image capturer 630 performs the action of capturing the user's eye image, while the image capturer 670 can simultaneously perform the action of capturing the eye image VR1 of the target character. At the same time, the electrically controlled lens 650, the electrically controlled light diffuser 660, and the light shield 640 are all enabled. In this way, the user's eye image captured by the image capturer 630 can be used as the setting image SETI and sent to the target character through the projected image PG, allowing the target character to observe the user's eye image.

[0089] During time interval t2, the electrically controlled lens 650, electrically controlled light diffuser 660, and light shield 640 are all disabled, and the image capture units 630 and 670 are both turned off. Simultaneously, the display 610 provides the display image IMG. At this time, with the light shield 640 disabled, the display image IMG transmitted by the light guide assembly 620 can pass through the light shield 640 to reach the user's eyes. At the same time, ambient light can also pass through the light shield 640 to reach the user's eyes, allowing the user to observe the display effects of virtual reality and / or augmented reality.

[0090] By intermittently providing the setting image SET1 to the target character and the display image IMG to the user in each image frame cycle FN1~FN2, users can simultaneously engage in social interaction with the target character while experiencing the display effects of virtual reality and / or augmented reality, thus achieving the effect of a social mode.

[0091] Incidentally, the periodic operation of the shade 640 in this embodiment, between fully open and fully closed, effectively improves the uniformity of the user's field of view.

[0092] Based on the above, the head-mounted display device of the present invention can achieve the effects of a privacy mode or a social mode by coordinating the disable / enable actions of the display and the light shield. Furthermore, the periodic operation of the light shield of the present invention, under both fully open and fully closed conditions, can effectively improve the uniformity of the user's viewing angle.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A head-mounted display device, comprising: The display periodically and alternately provides display images and setting images, wherein the display images are generated by the display; A light guide assembly, coupled to the display, generates a projected image based on the displayed image and the set image in a time-division manner; An electrically controlled lens is coupled to one surface of the light guide assembly; An electrically controlled light diffuser, wherein the electrically controlled lens is disposed between the electrically controlled light diffuser and the light guide assembly; A first image capturer is used to periodically capture images of a target area; and A light-blocking device is disposed between the light guide assembly and the target area, and the light-blocking device is periodically and alternately disabled and enabled. When the display provides the set image, the light blocker is enabled, and the first image capturer captures the target area image as the set image. When the display provides the display image, the light blocker is disabled, and the first image capturer stops capturing the target area image.

2. The head-mounted display device according to claim 1, wherein the electrically controlled lens and the electrically controlled light diffuser are enabled when the display provides the set image, and the electrically controlled lens and the electrically controlled light diffuser are disabled when the display provides the display image.

3. The head-mounted display device according to claim 1, wherein the set image is the target area image.

4. The head-mounted display device according to claim 1, further comprising: The second image capturer captures eye images of a pair of opposing characters as eye tracking information for the opposing characters. as well as The processor, coupled to the second image capturer, the first image capturer, and the display, obtains a gaze direction of the opposing character based on the eye-tracking information, and causes the display to provide the set image based on the gaze direction.

5. The head-mounted display device according to claim 4, wherein the second image capturer captures the eye image of the opposing character while the first image capturer captures the target area image.

Images