Display assembly and wearable display device

Abstract

The invention discloses a display assembly and wearable display equipment, and belongs to the technical field of electronic equipment. The display assembly comprises a display panel, a liquid crystal phase variable retarder, a reflective polarizer and a semi-transparent and semi-reflective beam splitting film. The display panel comprises a plurality of light-emitting units, and each light-emitting unit comprises a plurality of light-emitting modes. The liquid crystal phase variable delayer is arranged on the light emitting side of the display panel, and the liquid crystal phase variable delayer comprises a plurality of phase delay modes; wherein the liquid crystal phase variable delayer is used for switching a phase delay mode to a phase delay mode corresponding to a light emitting color according to the light emitting color corresponding to the light emitting mode of the light emitting unit, so that the phase difference between light rays of different colors penetrating through the liquid crystal phase variable delayer is smaller than a phase difference threshold value; the semi-transparent and semi-reflective beam splitting film is arranged between the display panel and the liquid crystal phase variable retarder, and the reflective polarizer is located between the semi-transparent and semi-reflective beam splitting film and the liquid crystal phase variable retarder.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic equipment, and particularly relates to a display assembly and a wearable display device. BACKGROUND

[0002] In the related art, an Extend Reality (XR) device adopts a Pancake coaxial folded light path optical scheme as a near-eye display scheme. In the Pancake optical scheme, circularly polarized light is incident, and after passing through a Half-mirror lens (HML), a Quarter Wave Plate (QWP) and a Reflective Polarizer (RP) are matched to realize the folding of the light path.

[0003] The QWP realizes a phase delay of 1 / 4 wavelength for light with an incident angle of 0° and a single wavelength due to the material properties. However, the color display of an actual display device includes light with multiple wavelengths. In the entire light path of the Pancake coaxial folded light path optical scheme, the light needs to pass through the QWP three times. Since the phase delay of each color of light is inconsistent when passing through the QWP, this will cause the proportion of Red Green Blue (RGB) three-color light in the final outgoing light to deviate significantly, resulting in a color cast problem in the image entering the eye. SUMMARY

[0004] The present application aims to provide a display assembly and a wearable display device, which can solve the color cast problem of the image entering the eye of the display device using the Pancake optical scheme in the related art.

[0005] In a first aspect, an embodiment of the present application provides a display assembly, comprising:

[0006] The display panel includes a plurality of light emitting units, and each light emitting unit includes a plurality of light emitting modes, and the light emitting colors corresponding to the plurality of light emitting modes are different;

[0007] The liquid crystal phase variable retarder is arranged on the light emitting side of the display panel, and includes a plurality of phase delay modes, and the plurality of phase delay modes correspond one-to-one to the plurality of light emitting colors; wherein the liquid crystal phase variable retarder is configured to switch the phase delay mode to the phase delay mode corresponding to the light emitting color according to the light emitting color corresponding to the light emitting mode of the light emitting unit, so that the phase difference between the light rays of different colors passing through the liquid crystal phase variable retarder is less than a phase difference threshold;

[0008] A semi-transparent and semi-reflective beam splitter is disposed between a display panel and a liquid crystal phase-variable retarder; wherein, the side of the semi-transparent and semi-reflective beam splitter facing the display panel is used to transmit light, and the side of the semi-transparent and semi-reflective beam splitter facing the liquid crystal phase-variable retarder is used to reflect light.

[0009] A reflective polarizer is located between a semi-transparent and semi-reflective beam splitter and a liquid crystal phase-variable retarder. The reflective polarizer transmits light in a first polarization state and reflects light in a second polarization state, the first polarization state and the second polarization state being orthogonal.

[0010] Secondly, embodiments of this application propose a wearable display device, comprising:

[0011] ontology;

[0012] As mentioned in the first aspect, the display component is located on the main body.

[0013] This application incorporates a liquid crystal phase-delay variable delay unit in the display component, dynamically adjusting the phase delay mode according to the emission mode of the light-emitting units in the display panel. In other words, when the emitted color of the light-emitting unit changes, the phase delay of the liquid crystal phase-delay variable delay unit also changes accordingly. This ensures that different colors of light no longer require the same phase delay adjustment method, bringing the phase difference between different colors of light passing through the liquid crystal phase-delay variable delay unit closer together. This reduces the deviation in the proportion of RGB light in the final emitted light, alleviates color shift in the image entering the eye, and improves the display effect.

[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 The present application shows schematic diagrams of the structure of display components according to some embodiments;

[0017] Figure 2A This application shows a schematic diagram of the optical path of a display component using QWP according to some embodiments of the present application;

[0018] Figure 2B An improved optical path schematic diagram of a display component according to some embodiments of this application is shown;

[0019] Figure 3A A schematic diagram of the display components shown in red is illustrated for some embodiments of this application;

[0020] Figure 3B A schematic diagram of the display components in some embodiments of this application is shown, illustrating an architecture where the display components are displayed in green.

[0021] Figure 3C A schematic diagram of the display components shown in blue is illustrated for some embodiments of this application;

[0022] Figure 4A A schematic diagram of the structure of a liquid crystal phase-variable delay device according to some embodiments of this application is shown;

[0023] Figure 4B A schematic diagram of the structure of a liquid crystal phase-variable delay device according to some embodiments of this application is shown.

[0024] Figure label:

[0025] 10 Display component, 100 Display panel, 1002 Light-emitting unit, 102 Liquid crystal phase-variable delay unit, 1020 Deflection module, 1021 First substrate, 1022 Second substrate, 1023 Liquid crystal layer, 10232 Liquid crystal unit, 1024 First electrode layer, 1025 First alignment layer, 1026 Second electrode layer, 1027 Second alignment layer, 104 Display lens, 106 Reflective polarizer, 108 Semi-transparent and semi-reflective beam splitter. Detailed Implementation

[0026] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The following is combined with Figures 1 to 4B This application describes a display component and a wearable display device according to embodiments thereof.

[0031] In some embodiments of this application, a display component is provided. Figure 1 The following are schematic diagrams illustrating the structure of display components according to some embodiments of this application, such as... Figure 1 As shown, it includes:

[0032] Display panel 100, the display panel 100 includes a plurality of light-emitting units 1002, the light-emitting units 1002 include a plurality of light-emitting modes, and the light-emitting modes correspond to different light-emitting colors;

[0033] A liquid crystal phase-delay delay unit 102 is disposed on the light-emitting side of the display panel 100. The liquid crystal phase-delay delay unit 102 includes multiple phase delay modes, each corresponding to a multiple light-emitting color. The liquid crystal phase-delay delay unit 102 is used to switch the phase delay mode to the phase delay mode corresponding to the light-emitting color according to the light-emitting mode of the light-emitting unit 1002, so that the phase difference between different colors of light passing through the liquid crystal phase-delay delay unit 102 is less than the phase difference threshold.

[0034] A reflective polarizer 106 and a semi-transparent, semi-reflective beam splitter 108 are provided. The semi-transparent, semi-reflective beam splitter 108 is disposed between the display panel 100 and the liquid crystal phase-variable retarder 102. The side of the semi-transparent, semi-reflective beam splitter 108 facing the display panel 100 is used to transmit light, and the side of the semi-transparent, semi-reflective beam splitter 108 facing the liquid crystal phase-variable retarder 102 is used to reflect light. The reflective polarizer 106 is located between the semi-transparent, semi-reflective beam splitter 108 and the liquid crystal phase-variable retarder 102. The reflective polarizer 106 is used to transmit light of a first polarization state and reflect light of a second polarization state, wherein the first polarization state and the second polarization state are orthogonal.

[0035] In this embodiment of the application, the display panel 100 is, by way of example, a liquid crystal display panel, and the display panel 100 includes a plurality of light-emitting units 1002, each of which is a group of liquid crystal pixels. By way of example, a light-emitting unit 1002 includes three liquid crystal pixels: red, green, and blue, thereby enabling the switching of different light-emitting modes, such as red light-emitting mode, blue light-emitting mode, and green light-emitting mode.

[0036] The display panel 100 includes a light-emitting side, which is also the side used to display images. A liquid crystal phase-delay unit 102 is disposed on the light-emitting side of the display panel 100. Therefore, the light emitted by the light-emitting unit 1002 of the display panel 100 passes through the liquid crystal phase-delay unit 102, and its phase is delayed under the action of the liquid crystal phase-delay unit 102.

[0037] Figure 2A The following is a schematic diagram of the optical path of a display component 10 using a QWP according to some embodiments of this application, such as... Figure 2A As shown, the Pancake optical scheme uses circularly polarized light incident. Figure 2A From left to right: RP, QWP, HML, Display. Display refers to display panel 100.

[0038] like Figure 1 and Figure 2AAs shown, the display assembly 10 also includes a reflective polarizer (RP) 106 and a half-mirror lens (HML) 108. Ideally, assuming the circularly polarized light L121 emitted by the display is right-handedly polarized, L121 becomes right-handedly polarized light L122 after passing through the HML. L122 is converted to S-state linearly polarized light L123 by the QWP. L123 becomes S-state linearly polarized light L124 after being reflected by the RP. L124 becomes right-handedly polarized light L125 after passing through the QWP a second time. L125 becomes left-handedly polarized light L126 after being reflected by the HML a second time. L126 becomes P-state polarized light L127 after passing through the QWP a third time. At this point, the P-state polarized light L127 can be transmitted through the RP and enter the human eye. This process achieves the folding of the optical path.

[0039] Due to the material properties, conventional QWPs can typically only achieve a precise 1 / 4 wavelength phase delay for light with a 0° incident angle (i.e., perpendicular to the QWP surface) and a single wavelength, enabling the conversion between linearly polarized and circularly polarized light.

[0040] In practical applications, achieving high-quality, color display means that the light emitted by the screen is broadband multi-wavelength light, and the incident light on the lens surface is obliquely incident at multiple and large angles. Therefore, circularly polarized light cannot be perfectly converted into linearly polarized light after passing through the QWP, and thus cannot be perfectly reflected when passing through the RP for the first time. Some light is directly transmitted, forming a "ghosting effect".

[0041] The light needs to pass through QWP three times in the entire optical path. Since the phase of each color (wavelength) of light is delayed at different times when passing through QWP, the ellipticity of the resulting ellipsoidally polarized light is different (i.e., the ratio of vertical to horizontal components is different). After the phase delay error accumulates after passing through QWP three times, the proportion of RGB light in the final RP output light also has a significant deviation, resulting in a color cast problem in the final image displayed to the eye.

[0042] To address the aforementioned issues, this application introduces a liquid crystal variable retarder 102. A liquid crystal variable retarder (LCVR) is a device that modulates the phase of incident light based on the principle that uniaxial birefringent anisotropic liquid crystal molecules deflect under the influence of an electric field. It has the advantage that the delay is insensitive to the angle and wavelength of the incident light.

[0043] For example, Figure 2B An improved optical path schematic diagram of the display component 10 according to some embodiments of this application is shown, such as... Figure 2BAs shown, the liquid crystal phase variable delay unit 102 can cooperate with the time-division display of the display panel 100 to switch the phase delay mode in a very short time in accordance with the light emission mode of the light emission unit 1002, thereby setting an independent phase delay parameter for each light emission color of the light emission unit 1002.

[0044] In this way, the phase difference of different colors of light emitted by the display panel 100 after passing through the liquid crystal phase variable delay unit 102 can be made close, specifically, the phase difference between different colors of light passing through the liquid crystal phase variable delay unit 102 is less than the phase difference threshold.

[0045] For example, the phase difference threshold ranges from 1° to 7°.

[0046] For example, such as Figure 2B As shown, the circularly polarized light emitted from the display panel 100 remains circularly polarized after its first pass through the semi-transparent, semi-reflective beam splitter 108. After the first pass through the liquid crystal phase-variable retarder 102, the circularly polarized light, under the phase retardation effect of the liquid crystal phase-variable retarder 102, is transformed into elliptically polarized light with a higher ellipticity, closer to the original polarized light. This elliptically polarized light with a higher ellipticity is reflected by the reflective polarizer 106, forming linearly polarized light. After the linearly polarized light passes through the liquid crystal phase-variable retarder 102 a second time, it forms elliptically polarized light with a lower ellipticity, closer to the circularly polarized light. This elliptically polarized light with a lower ellipticity remains elliptically polarized light after being reflected by the semi-transparent, semi-reflective beam splitter 108. After the elliptically polarized light with a lower ellipticity passes through the liquid crystal phase-variable retarder 102 a third time, it forms elliptically polarized light with a higher ellipticity and is emitted through the reflective polarizer 106, ultimately entering the human eye.

[0047] This application provides a liquid crystal phase-delay variable delay unit 102 in the display component 10, which dynamically adjusts the phase delay mode according to the light emission mode of the light-emitting unit 1002 of the display panel 100. In other words, after the light emission color of the light-emitting unit 1002 changes, the phase delay of the liquid crystal phase-delay variable delay unit 102 also changes accordingly. This prevents different colors of light from being adjusted in the same way, allowing the phase difference of different colors of light passing through the liquid crystal phase-delay variable delay unit 102 to be closer, thereby reducing the deviation in the proportion of RGB light in the final emitted light, mitigating color shift in the image entering the eye, and improving the display effect.

[0048] In some embodiments of this application, the display panel 100 is also used to control the light-emitting unit 1002 to sequentially switch the light-emitting mode when displaying the first image, so as to display the grayscale image of the first image in different color channels under different light-emitting modes.

[0049] In this embodiment, the display panel 100 implements color display by displaying different colors in a time-division manner. For example, using the RGB color space, when displaying a color image, the image content of the same color image is displayed sequentially in the order of R grayscale image, G grayscale image, and B grayscale image. That is, when displaying an R grayscale image, the G and B pixels in the light-emitting unit 1002 are not lit, and all R pixels emit light according to the content of the displayed image; when displaying a G grayscale image, the R and B pixels in the light-emitting unit 1002 are not lit, and all G pixels emit light according to the content of the displayed image; when displaying a B grayscale image, the R and G pixels in the light-emitting unit 1002 are not lit, and all B pixels emit light according to the content of the displayed image.

[0050] Through the above process, the R grayscale image, G grayscale image, and B grayscale image will be sequentially imaged onto the human retina. According to the characteristic of visual persistence, when the three grayscale images are sequentially imaged onto the retina in a very short time (usually at the millisecond level or even less), the human eye perceives the color and brightness as the effect formed by the superposition of the three grayscale images, that is, to achieve color display for human vision.

[0051] In this process, the liquid crystal phase variable delay device 102 dynamically switches the phase delay mode in real time according to the light emission mode of the light emission unit 1002, so that the phase of each color of light passing through the liquid crystal phase variable delay device 102 is close or the same, thereby improving the color reproduction of the display component.

[0052] In some embodiments of this application, the light-emitting unit 1002 includes a red light-emitting mode, a green light-emitting mode, and a blue light-emitting mode; the liquid crystal phase variable delay device 102 includes a first phase delay mode, a second phase delay mode, and a third phase delay mode; wherein the phase delay amounts of the first phase delay mode, the second phase delay mode, and the third phase delay mode are different;

[0053] When the light-emitting unit 1002 is in the red light-emitting mode, the liquid crystal phase variable delay unit 102 operates in the first phase delay mode; when the light-emitting unit 1002 is in the green light-emitting mode, the liquid crystal phase variable delay unit 102 operates in the second phase delay mode; when the light-emitting unit 1002 is in the blue light-emitting mode, the liquid crystal phase variable delay unit 102 operates in the third phase delay mode.

[0054] In this embodiment of the application, the display panel is an RGB display panel 100, and the light-emitting unit 1002 of the display panel 100 includes R pixels, G pixels and B pixels, thereby realizing red light-emitting mode, green light-emitting mode and blue light-emitting mode.

[0055] Correspondingly, the crystal phase-variable delayer includes a first phase delay mode corresponding to the red emission mode, a second phase delay mode corresponding to the green emission mode, and a third phase delay mode corresponding to the blue emission mode.

[0056] For example, Figure 3A The display component 10 shown in red is illustrated in the schematic diagram of the architecture of some embodiments of this application, such as... Figure 3A As shown, when the light-emitting unit 1002 is in red light-emitting mode, that is, when displaying an R grayscale image, the liquid crystal phase variable delay unit 102 is in the first phase delay mode.

[0057] Figure 3B A schematic diagram of the display component 10 in green, as shown in some embodiments of this application, is illustrated. Figure 3B As shown, when the light-emitting unit 1002 is in the green light-emitting mode, that is, when displaying a grayscale image, the liquid crystal phase variable delay unit 102 is in the second phase delay mode.

[0058] Figure 3C The display component 10 shown in blue is a schematic diagram illustrating the architecture of some embodiments of this application, such as... Figure 3C As shown, when the light-emitting unit 1002 is in blue light-emitting mode, that is, when displaying a grayscale image, the liquid crystal phase variable delay unit 102 is in the third phase delay mode.

[0059] By switching the delay mode of the liquid crystal phase variable delay unit 102 according to the light emission mode of the light emission unit 1002, the phases of different colors of light passing through the liquid crystal phase variable delay unit 102 can be brought closer, thereby improving the realistic effect.

[0060] In some embodiments of this application, in a first phase delay mode, the phase delay of the liquid crystal phase variable delay unit 102 for red light is 1 / 4 of the wavelength of red light; in a second phase delay mode, the phase delay of the liquid crystal phase variable delay unit 102 for green light is 1 / 4 of the wavelength of green light; and in a third phase delay mode, the phase delay of the liquid crystal phase variable delay unit 102 for blue light is 1 / 4 of the wavelength of blue light.

[0061] In this embodiment of the application, the wavelength of red light is set to λ. R The wavelength of green light is λ G Blue light has a wavelength of λ B When the light-emitting unit 1002 is in the red light-emitting mode, the liquid crystal phase-variable retarder 102 is in the first phase-retardation mode. At this time, the phase retardation of the first phase-retardation mode for red light (long wavelength light) is 1 / 4λ. R .

[0062] When the light-emitting unit 1002 is in the green light-emitting mode, the liquid crystal phase variable retarder 102 is in the second phase retardation mode. At this time, the phase retardation of the second phase retardation mode for green light (medium wavelength light) is 1 / 4λ. G .

[0063] When the light-emitting unit 1002 is in blue light-emitting mode, the liquid crystal phase-variable retarder 102 is in the third phase-retardation mode. At this time, the phase retardation of the third phase-retardation mode for blue light (short-wavelength light) is 1 / 4λ. B .

[0064] By adjusting the phase delay of each color of light to 1 / 4 of its wavelength, the phase of each color of light can be delayed in a consistent manner when passing through the liquid crystal phase variable delay unit 102, ensuring that the ellipticity of the ellipsoidally polarized light formed is consistent. This makes the proportion of RBG three-color light in the final light entering the eye consistent with the image to be displayed, thereby reducing the problem of color distortion in the image and improving the display effect.

[0065] In some embodiments of this application, a liquid crystal phase-variable delay device 102, Figure 4A and Figure 4B A schematic diagram of the structure of a liquid crystal phase-variable delay device 102 according to some embodiments of this application is shown, such as... Figure 4A and Figure 4B As shown, the liquid crystal phase-delay variable delay device 102 includes a deflection module 1020, a first substrate 1021, a second substrate 1022, and a liquid crystal layer 1023. The first substrate 1021 and the second substrate 1022 are disposed opposite to each other. The liquid crystal layer 1023 is disposed between the first substrate 1021 and the second substrate 1022. The liquid crystal layer 1023 includes a plurality of liquid crystal cells 10232; the deflection module 1020 is disposed between the first substrate 1021 and the second substrate 1022; wherein, the deflection module 1020 is used to adjust the deflection angle of the liquid crystal cells 10232 in different phase delay modes of the liquid crystal phase-delay variable delay device 102.

[0066] In this embodiment, the liquid crystal phase-variable delay device 102 includes a first substrate 1021 and a second substrate 1022 disposed opposite to each other. Exemplarily, both the first substrate 1021 and the second substrate 1022 are glass substrates. The liquid crystal phase-variable delay device 102 also includes a liquid crystal layer 1023, which is located between the first substrate 1021 and the second substrate 1022. The liquid crystal layer 1023 includes a plurality of liquid crystal cells 10232.

[0067] For example, such as Figure 4A As shown, the phase delay of the liquid crystal phase variable delay device 102 is maximized when the long axis of the liquid crystal cell 10232 is parallel to the first substrate 1021 and the second substrate 1022.

[0068] For example, the phase delay of the liquid crystal phase variable delay unit 102 can be expressed by the following formula:

[0069]

[0070] Where δ is the phase retardation, λ is the incident light wavelength, Δn is the difference in refractive index between the major and minor axes of the liquid crystal cell 10232, and d is the thickness of the liquid crystal layer 1023.

[0071] The deflection module 1020 can adjust the deflection angle of the liquid crystal cell 10232 so that the deflection angle of the liquid crystal cell 10232 is different in different phase delay modes of the liquid crystal phase variable delay device 102.

[0072] For example, such as Figure 4B As shown, when the deflection angle of the liquid crystal cell 10232 changes, the angle between the long axis of the liquid crystal cell 10232 and the first substrate 1021 and the second substrate 1022 changes, and the phase delay of the liquid crystal phase variable delay device 102 also changes accordingly. When the long axis of the liquid crystal cell 10232 is perpendicular to the first substrate 1021 and the second substrate 1022, the phase delay of the liquid crystal phase variable delay device 102 is the smallest.

[0073] Since the liquid crystal phase variable delay unit 102 has a delay amount that is insensitive to the incident light angle and wavelength, and can quickly respond to the change of the light emission color of the light-emitting unit 1002 to change the deflection angle of the liquid crystal unit 10232 to adjust the phase delay amount, it can reduce "ghosting" and color distortion, and improve the realism effect.

[0074] In some embodiments of this application, such as Figure 4A and Figure 4B As shown, the liquid crystal phase-variable delay device 102 further includes a first electrode layer 1024, a second electrode layer 1026, a first alignment layer 1025, and a second alignment layer 1027. The first electrode layer 1024 is bonded to a first substrate 1021; the first alignment layer 1025 is disposed between the liquid crystal layer 1023 and the first substrate 1021, and the first electrode layer 1024 is located between the first substrate 1021 and the first alignment layer 1025; the second electrode layer 1026 is bonded to a second substrate 1022; the second alignment layer 1027 is disposed between the liquid crystal layer 1023 and the second substrate 1022, and the second electrode layer 1026 is located between the second substrate 1022 and the second alignment layer 1027; wherein, the deflection angle of the liquid crystal cell 10232 is related to the voltage between the first electrode layer 1024 and the second electrode layer 1026.

[0075] In this embodiment, the deflection module 1020 includes a first electrode layer 1024, a second electrode layer 1026, a first alignment layer 1025, and a second alignment layer 1027. Specifically, along the direction from one side to the other of the liquid crystal phase-variable retarder 102, the liquid crystal phase-variable retarder 102 sequentially includes a first substrate 1021, a first electrode layer 1024, a first alignment layer 1025, a liquid crystal layer 1023, a second alignment layer 1027, a second electrode layer 1026, and a second substrate 1022. The first electrode layer 1024 is bonded to the first substrate 1021, and the second electrode layer 1026 is bonded to the second substrate 1022.

[0076] A voltage can be generated between the first electrode layer 1024 and the second electrode layer 1026. Without applying a voltage, the liquid crystal cells 10232 in the liquid crystal layer 1023, anchored by the first alignment layer 1025 and the second alignment layer 1027, such as... Figure 4A As shown, the long axis of the liquid crystal cell 10232 remains parallel to the substrate.

[0077] When a voltage is generated between the first electrode layer 1024 and the second electrode layer 1026, under the action of an electric field, such as Figure 4B As shown, the liquid crystal cell 10232 will be deflected. It can be understood that the higher the voltage between the first electrode layer 1024 and the second electrode layer 1026, the larger the deflection angle of the liquid crystal cell 10232 and the smaller the phase delay of the liquid crystal phase variable delay unit 102.

[0078] By setting a liquid crystal phase-variable delay unit 102 in the display component 10, and in conjunction with the time-division and color-division display scheme of the display panel 100, it is possible to control the liquid crystal phase-variable delay unit 102 to perform π / 2 phase delay on the three different wavelengths of light while the display panel 100 displays the R grayscale image, G grayscale image and B grayscale image in sequence in a very short time, thereby realizing a near-eye display scheme with low ghosting and low color distortion for broadband light incident at a large angle.

[0079] In some embodiments of this application, in a first phase delay mode, the voltage between the first electrode layer 1024 and the second electrode layer 1026 is a first voltage; in a second phase delay mode, the voltage between the first electrode layer 1024 and the second electrode layer 1026 is a second voltage; in a third phase delay mode, the voltage between the first electrode layer 1024 and the second electrode layer 1026 is a third voltage; the first voltage is less than the second voltage, and the second voltage is less than the third voltage.

[0080] In this embodiment, the first phase delay mode corresponds to the red light-emitting mode of the light-emitting unit 1002. Red light is a long-wavelength light. In the first phase delay mode, a lower voltage is applied between the first electrode layer 1024 and the second electrode layer 1026, resulting in a larger phase delay.

[0081] The second phase delay mode corresponds to the green light-emitting mode of the light-emitting unit 1002. The green light is a medium-wavelength light. In the second phase delay mode, a moderate voltage is applied between the first electrode layer 1024 and the second electrode layer 1026 to centralize the phase delay amount of the second phase delay mode.

[0082] The third phase delay mode corresponds to the blue light emission mode of the light-emitting unit 1002. Blue light is short-wavelength light. In the third phase delay mode, a higher voltage is applied between the first electrode layer 1024 and the second electrode layer 1026, resulting in a smaller phase delay in the third phase delay mode.

[0083] By adjusting the voltage between the first electrode layer 1024 and the second electrode layer 1026 based on different emission wavelengths, different phase delays are achieved, so that the phases of the light that finally passes through the liquid crystal phase variable delay unit 102 are close, thus reducing the color shift problem.

[0084] In some embodiments of the application, the display component 10 further includes: a display lens 104 disposed on the light-emitting side of the display panel 100, and a liquid crystal phase variable delay unit 102 disposed on the display lens 104.

[0085] In the embodiments of this application, such as Figure 1 As shown, the display assembly 10 includes a display lens 104, which is the portion of the near-eye display device that faces the human eye. Light emitted from the display panel 100 passes through the internal optical path, exits through the display lens 104, and enters the human eye. A liquid crystal phase-delay unit 102 is disposed on the display lens 104, which can reduce the occupancy of the internal controls of the display assembly 10.

[0086] In some embodiments of the application, the liquid crystal phase variable delay 102, the reflective polarizer 106, and the semi-transparent and semi-reflective beam splitter 108 are all attached to the side of the display lens 104 facing the display panel 100.

[0087] In this embodiment, a reflective polarizer 106, a liquid crystal phase-variable retarder 102, and a transflective beam splitter 108 are sequentially attached to the display lens 104. Circularly polarized light emitted from the display panel 100 first passes through the transflective beam splitter 108 and then the liquid crystal phase-variable retarder 102. The polarized light is reflected by the reflective polarizer 106, then passes through the liquid crystal phase-variable retarder 102 a second time, then through the transflective beam splitter 108 again, and finally through the liquid crystal phase-variable retarder 102 a third time before being emitted from the reflective polarizer 106 and ultimately entering the human eye. This optical path design enables a better sense of depth perception on near-eye display devices.

[0088] This application enables near-eye display with minimal "ghosting" and background color shift by using an optical path consisting of a display panel 100, a semi-transparent and semi-reflective beam splitter 108, a liquid crystal phase-variable delay unit 102, and a reflective polarizer 106.

[0089] In some embodiments of this application, a wearable display device is also provided, including a body and a display component as provided in any of the above embodiments, wherein the display component is disposed on the body. Therefore, the wearable display device also includes all the beneficial effects of the display component as provided in any of the above embodiments, and will not be repeated here to avoid repetition.

[0090] For example, wearable devices include, but are not limited to, mixed reality devices, augmented reality devices, virtual reality devices, and head-mounted reality devices.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A display component, characterized in that, include: The display panel includes multiple light-emitting units, each light-emitting unit includes multiple light-emitting modes, and the multiple light-emitting modes correspond to different light-emitting colors. A liquid crystal phase-delayed delay device is disposed on the light-emitting side of the display panel. The liquid crystal phase-delayed delay device includes multiple phase delay modes, each corresponding to a plurality of light-emitting colors. The liquid crystal phase-delayed delay device is used to switch the phase delay mode to the phase delay mode corresponding to the light-emitting color according to the light-emitting mode of the light-emitting unit, so that the phase difference between different colors of light passing through the liquid crystal phase-delayed delay device is less than a phase difference threshold. A transflective beam splitter is disposed between the display panel and the liquid crystal phase-variable delay device; wherein, the side of the transflective beam splitter facing the display panel is used to transmit light, and the side of the transflective beam splitter facing the liquid crystal phase-variable delay device is used to reflect light. A reflective polarizer is located between a semi-transparent, semi-reflective beam splitter and a liquid crystal phase-variable retarder; wherein the reflective polarizer is used to transmit light of a first polarization state and reflect light of a second polarization state, the first polarization state and the second polarization state being orthogonal.

2. The display component according to claim 1, characterized in that, The display panel is also used to control the light-emitting unit to sequentially switch the light-emitting mode when displaying the first image, so as to display the grayscale image of the first image in different color channels under different light-emitting modes.

3. The display component according to claim 1, characterized in that, The light-emitting unit includes a red light-emitting mode, a green light-emitting mode, and a blue light-emitting mode; the liquid crystal phase-variable delay device includes a first phase delay mode, a second phase delay mode, and a third phase delay mode; wherein the phase delay amounts of the first phase delay mode, the second phase delay mode, and the third phase delay mode are different; When the light-emitting unit is in the red light-emitting mode, the liquid crystal phase-variable delay device operates in the first phase delay mode; when the light-emitting unit is in the green light-emitting mode, the liquid crystal phase-variable delay device operates in the second phase delay mode; when the light-emitting unit is in the blue light-emitting mode, the liquid crystal phase-variable delay device operates in the third phase delay mode.

4. The display component according to claim 3, characterized in that, In the first phase delay mode, the phase delay of the liquid crystal phase variable delay device for red light is 1 / 4 of the red light wavelength; In the second phase delay mode, the phase delay of the liquid crystal phase variable retarder for green light is 1 / 4 of the green light wavelength; In the third phase delay mode, the phase delay of the liquid crystal phase variable delay device for blue light is 1 / 4 of the blue light wavelength.

5. The display component according to claim 3 or 4, characterized in that, The liquid crystal phase-variable delay device includes: A first substrate and a second substrate, wherein the first substrate and the second substrate are disposed opposite to each other; A liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer includes a plurality of liquid crystal cells; A deflection module is disposed between the first substrate and the second substrate; wherein the deflection module is used to adjust the deflection angle of the liquid crystal cell under different phase delay modes of the liquid crystal phase variable delay device.

6. The display component according to claim 5, characterized in that, The deflection module includes: A first electrode layer is attached to the first substrate; A first alignment layer is disposed between the liquid crystal layer and the first substrate, and a first electrode layer is located between the first substrate and the first alignment layer; The second electrode layer is bonded to the second substrate; A second alignment layer is disposed between the liquid crystal layer and the second substrate, and a second electrode layer is located between the second substrate and the second alignment layer; The deflection angle of the liquid crystal cell is related to the voltage between the first electrode layer and the second electrode layer.

7. The display component according to claim 6, characterized in that, In the first phase delay mode, the voltage between the first electrode layer and the second electrode layer is a first voltage; in the second phase delay mode, the voltage between the first electrode layer and the second electrode layer is a second voltage; in the third phase delay mode, the voltage between the first electrode layer and the second electrode layer is a third voltage; the first voltage is less than the second voltage, and the second voltage is less than the third voltage.

8. The display component according to any one of claims 1 to 7, characterized in that, The display component further includes: The display lens is disposed on the light-emitting side of the display panel, and the liquid crystal phase variable delay device is disposed on the display lens.

9. The display component according to claim 8, characterized in that, The liquid crystal phase-variable retarder, the reflective polarizer, and the semi-transparent and semi-reflective beam splitter are all attached to the side of the display lens facing the display panel.

10. A wearable display device, characterized in that, include: ontology; The display component as described in any one of claims 1 to 9, wherein the display component is disposed on the body.

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