3D glasses and 3D image display system

Abstract

The invention discloses a pair of 3D glasses and a 3D image display system, and relates to the technical field of display, a left eye lens and a right eye lens of the 3D glasses each comprise a half-wavelength liquid crystal box and a first circular polarizer located on the side, close to eyes of a viewer, of the half-wavelength liquid crystal box, and a second circular polarizer located on the side, close to the eyes of the viewer, of the half-wavelength liquid crystal box. After the circularly polarized light emitted by the display screen penetrates through the half-wavelength liquid crystal boxes of the left eyeglass and the right eyeglass, the circularly polarized light with the same or opposite rotation directions is formed because the half-wavelength liquid crystal boxes of the left eyeglass and the right eyeglass can generate pi phase delay or do not generate phase delay; the included angle between the polarization direction of a first linear polarization layer and the slow axis direction of a first quarter-wavelength compensation layer in the first circular polarizers of the left eyeglass and the right eyeglass is set, so that the light quickly and alternately penetrates through the left eyeglass and the right eyeglass and is received by the left eye and the right eye of a viewer, and the 3D display effect is achieved; the pair of 3D glasses has the advantages of simple structure, full view angle and high passing rate.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to 3D glasses and a 3D image display system. Background Art

[0002] Existing image display systems are capable of displaying three-dimensional (3D) images, allowing people to enjoy a stereoscopic visual effect. When viewing 3D images, viewers must wear 3D glasses, which allow their left and right eyes to rapidly alternate between viewing the images. The human brain then fuses these rapidly alternating views into a continuous three-dimensional image. However, existing 3D glasses have a relatively low light transmittance, which affects the 3D image display quality. Summary of the Invention

[0003] To solve the above technical problems, the present application provides a 3D glasses and a 3D image display system to increase the light transmittance of the 3D glasses and improve the display effect of 3D images.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] In a first aspect of the present application, a 3D pair of glasses is provided, wherein the 3D pair of glasses comprises a left lens and a right lens, wherein the left lens and the right lens each comprise:

[0006] A half-wavelength liquid crystal cell is used to control the phase delay of the first circularly polarized light emitted by the display screen. The half-wavelength liquid crystal cell includes a liquid crystal layer. Under the control of a driving voltage, the liquid crystal molecules in the liquid crystal layer are in a first state or a second state. When the liquid crystal molecules in the liquid crystal layer are in the first state, the liquid crystal layer generates a π phase delay. When the liquid crystal molecules in the liquid crystal layer are in the second state, the liquid crystal layer generates no phase delay. The first circularly polarized light emitted by the display screen is converted into the second circularly polarized light after passing through the half-wavelength liquid crystal cell.

[0007] a first circular polarizer located on a side of the half-wavelength liquid crystal cell close to the viewer's eyes; the first circular polarizer comprising a first quarter-wavelength compensation layer and a first linear polarization layer located on a side of the first quarter-wavelength compensation layer facing away from the half-wavelength liquid crystal cell; the first quarter-wavelength compensation layer is configured to convert the second circularly polarized light into the first linearly polarized light, and an angle between a polarization direction of the first linear polarization layer and a slow axis direction of the first quarter-wavelength compensation layer is 45° or -45°;

[0008] When the liquid crystal molecules in the liquid crystal layers of the left and right lenses are in the same state, the angle between the polarization direction of the first linear polarization layer of one left lens and the slow axis direction of the first quarter-wavelength compensation layer is 45°, and the angle between the polarization direction of the first linear polarization layer of the other left lens and the slow axis direction of the first quarter-wavelength compensation layer is -45°.

[0009] When the states of the liquid crystal molecules in the liquid crystal layers of the left and right lenses are different, in the left and right lenses, the angles between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer are both 45° or -45°.

[0010] In a second aspect of the present application, a 3D image display system is provided, the 3D image display system comprising:

[0011] A display screen, comprising a display module and a second circular polarizer located on a display surface side of the display module, the second circular polarizer comprising a second linear polarization layer and a second quarter-wavelength compensation layer located on a side of the second linear polarization layer facing away from the display module, wherein the angle between the polarization direction of the second linear polarization layer and the slow axis direction of the second quarter-wavelength compensation layer is 45° or -45°; light emitted from the display module is converted into second linearly polarized light after passing through the second linear polarization layer, and the second linearly polarized light is converted into first circularly polarized light after passing through the second quarter-wavelength compensation layer;

[0012] 3D glasses, which are the above-mentioned 3D glasses.

[0013] Compared with the existing technology, the above technical solution has the following advantages:

[0014] In the 3D glasses provided by the present application, both the left-eye lens and the right-eye lens include a half-wavelength liquid crystal cell and a first circular polarizer located on the side of the half-wavelength liquid crystal cell close to the viewer's glasses; the first circularly polarized light emitted by the display screen first enters the half-wavelength liquid crystal cell, and the half-wavelength liquid crystal cell includes a liquid crystal layer. Under the control of a driving voltage, the liquid crystal molecules in the liquid crystal layer are in a first state or a second state. When the liquid crystal molecules in the liquid crystal layer are in the first state, the liquid crystal layer produces a π phase delay. The half-wavelength liquid crystal cell is equivalent to half a glass plate, so that the left-handed (right-handed) first circularly polarized light becomes a right-handed (left-handed) second circularly polarized light after passing through the half-wavelength liquid crystal cell. When the liquid crystal molecules in the liquid crystal layer are in the second state, the liquid crystal layer does not produce a phase delay, and the left-handed (right-handed) first circularly polarized light becomes a left-handed (right-handed) second circularly polarized light after passing through the half-wavelength liquid crystal cell; further, the left-handed (right-handed) The second circularly polarized light is incident on the first circular polarizer, which includes a first quarter-wavelength compensation layer and a first linear polarization layer located on the side of the first quarter-wavelength compensation layer away from the half-wavelength liquid crystal cell. Since the left-handed (right-handed) second circularly polarized light is composed of two beams of linearly polarized light with equal amplitudes, perpendicular vibration directions and a phase difference of ±π / 2, and the first quarter-wavelength compensation layer will produce an additional π / 2 phase delay, the total phase difference of the two beams of linearly polarized light in the second circularly polarized light becomes 0 or π, and is converted into first linear polarized light, and the angle between the polarization direction of the first linear polarized light and the slow axis direction of the first quarter-wavelength compensation layer is 45° or -45°. In this way, by setting the angle between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer to 45° or -45°, the first linear polarized light can be transmitted through the first linear polarization layer or not.

[0015] Thus, when the states of the liquid crystal molecules in the liquid crystal layers of the left and right lenses are always the same, the first circularly polarized light emitted by the display screen becomes second circularly polarized light of the same rotation direction after passing through the half-wavelength liquid crystal cells of the left and right lenses, respectively, and further becomes first linearly polarized light of the same polarization direction after passing through the first quarter-wavelength compensation layers of the left and right lenses, respectively. Thus, the angle between the polarization direction of the first linear polarization layer of one of the left and right lenses and the slow axis direction of the first quarter-wavelength compensation layer is set to 45°, and the angle between the polarization direction of the first linear polarization layer of the other lens and the slow axis direction of the first quarter-wavelength compensation layer is set to -45°, so that the first linearly polarized light of the same polarization direction is emitted through one of the left and right lenses but not through the other.

[0016] When the states of the liquid crystal molecules in the liquid crystal layers of the left eye lens and the right eye lens are always different, the first circularly polarized light emitted by the display screen passes through the half-wavelength liquid crystal boxes of the left eye lens and the right eye lens respectively, and one becomes left-handed second circularly polarized light and the other becomes right-handed second circularly polarized light. Then, after passing through the first quarter-wavelength compensation layer of the left eye lens and the right eye lens respectively, the polarization directions of the emitted first linear polarized light are perpendicular to each other. In this way, the angles between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer in the left eye lens and the right eye lens are both 45° or -45°, so that the first linear polarized light with mutually perpendicular polarization directions is emitted through one of the left eye lens and the right eye lens but not through the other.

[0017] In this way, the light emitted by the display screen can quickly and alternately pass through the left and right lenses of the 3D glasses and be received by the viewer's left and right eyes, achieving a 3D display effect.

[0018] Compared to existing 3D glasses, which typically include at least two layers of polarizers in addition to a liquid crystal cell to achieve a 3D display effect, resulting in low light transmittance and affecting the display quality of 3D images, the 3D glasses provided by the present application utilize a half-wavelength liquid crystal cell to control the phase delay of the circularly polarized light emitted by the display screen, and a first circular polarizer is provided on the side of the half-wavelength liquid crystal cell closest to the viewer's eye to achieve a 3D display effect. Because only the first circular polarizer is provided in addition to the half-wavelength liquid crystal cell, the 3D glasses provided by the present application have a higher light transmittance and an improved 3D image display effect. Moreover, the 3D glasses have a simple structure and are applicable to various display screens. Because the 3D glasses process the circularly polarized light emitted by the display screen, they can also be rotated arbitrarily without reducing the display quality. In other words, the 3D glasses provided by the present application are simple in structure, have a full viewing angle, and have a high transmittance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic structural diagram of 3D glasses and a 3D image display system provided in an embodiment of the present application;

[0021] Figure 2 A schematic structural diagram of another 3D glasses and 3D image display system provided in an embodiment of the present application;

[0022] Figure 3 A schematic structural diagram of another 3D glasses and a 3D image display system provided in an embodiment of the present application;

[0023] Figure 4 A schematic structural diagram of another 3D glasses and a 3D image display system provided in an embodiment of the present application;

[0024] Reference numerals:

[0025] 100-display screen; 200-3D glasses; 210L-left eye lens; 210R-right eye lens; 10-half-wavelength liquid crystal cell; 11-liquid crystal layer; 1-liquid crystal molecules; 12-first transparent substrate; 13-second transparent substrate; 14-first transparent electrode; 15-first alignment layer; 16-second transparent electrode; 17-second alignment layer; 20-first circular polarizer; 21-first quarter-wavelength compensation layer; 22-first linear polarization layer; S1-first circularly polarized light; S2-second circularly polarized light; L1-first linear polarized light; 110-display module; 120-second circular polarizer; 30-second linear polarization layer; 40-second quarter-wavelength compensation layer; L2-second linear polarized light; X-first direction; Y-second direction; EL-left eye; ER-right eye. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0028] Secondly, this application is described in detail with reference to schematic diagrams. When describing the embodiments of this application, for ease of illustration, the drawings depicting device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of this application. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0029] As described in the background technology section, the light transmittance of existing 3D glasses is relatively low, which affects the display effect of 3D images.

[0030] In view of this, the embodiments of the present application provide a 3D glasses and a 3D image display system. Figures 1-4 The schematic diagrams of the structures of four 3D glasses and 3D image display systems provided in the embodiments of the present application are shown respectively. Figures 1-4 As shown, the 3D image display system includes a display screen 100 and 3D glasses 200. The display screen 100 emits a first circularly polarized light S1, and the 3D glasses 200 receive the first circularly polarized light S1 emitted by the display screen 100. The first circularly polarized light S1 is left-handed circularly polarized light or right-handed circularly polarized light.

[0031] like Figures 1-4 As shown, the 3D glasses 200 include a left-eye lens 210L and a right-eye lens 210R. Both the left-eye lens 210L and the right-eye lens 210R include a half-wavelength liquid crystal cell 10 and a first circular polarizer 20 located on the side of the half-wavelength liquid crystal cell 10 close to the viewer's eyes.

[0032] The half-wavelength liquid crystal cell 10 is used to control the phase delay of the first circularly polarized light S1 emitted by the display screen 100. Specifically, the half-wavelength liquid crystal cell 10 includes a liquid crystal layer 11. Under the control of a driving voltage, the liquid crystal molecules 1 in the liquid crystal layer 11 are in a first state or a second state. When the liquid crystal molecules 1 in the liquid crystal layer 11 are in the first state, such as Figure 1 The left eye lens 210L and the right eye lens 210R, Figure 3 Middle right eye lens 210R and Figure 4 As shown in the state of the liquid crystal molecules 1 in the liquid crystal layer 11 of the left lens 210L, the liquid crystal layer 11 produces a π phase delay. At this time, the liquid crystal layer 11 is equivalent to a half-wavelength glass, which produces a π phase delay for the first circularly polarized light S1 emitted by the display screen 100; when the liquid crystal molecules 1 in the liquid crystal layer 11 are in the second state, as shown in FIG. Figure 2 The left eye lens 210L and the right eye lens 210R, Figure 3 Center left eye lens 210R and Figure 4As shown in the state of the liquid crystal molecules 1 in the liquid crystal layer 11 of the middle right eye lens 210L, the liquid crystal layer 11 does not produce phase delay, so that the first circularly polarized light S1 emitted by the display screen 100 is directly transmitted; after the first circularly polarized light S1 emitted by the display screen 100 passes through the half-wavelength liquid crystal cell 10, it becomes the second circularly polarized light S2.

[0033] We know that circularly polarized light is formed by the superposition of two beams of linearly polarized light (o light component and e light component) with equal amplitudes, perpendicular vibration directions and a phase difference of ±π / 2; when the phase difference between the two beams of linearly polarized light is +π / 2, it is left-handed circularly polarized light; when the phase difference between the two beams of linearly polarized light is -π / 2, it is right-handed circularly polarized light; when viewed against the direction of light propagation, the light vector of left-handed circularly polarized light rotates counterclockwise, and the light vector of right-handed circularly polarized light rotates clockwise.

[0034] It can be understood that when the liquid crystal molecules 1 in the liquid crystal layer 11 of the half-wavelength liquid crystal cell 10 are in the first state, the liquid crystal layer 11 generates a π phase delay on the first circularly polarized light S1 emitted by the display screen 100, so that the phase difference between the two orthogonal linear polarized light beams (o light component and e light component) in the first circularly polarized light S1 increases by π, and the initial phase difference becomes ±π / 2 after the superposition of π. Causes the rotation direction to be reversed; then, if the first circularly polarized light S1 is left-handed circularly polarized light, the first circularly polarized light S1 emitted by the display screen 100 becomes right-handed second circularly polarized light S2 after passing through the half-wavelength liquid crystal cell 10; if the first circularly polarized light S1 is right-handed circularly polarized light, the first circularly polarized light S1 emitted by the display screen 100 becomes left-handed second circularly polarized light S2 after passing through the half-wavelength liquid crystal cell 10; that is, the left-handed (right-handed) first circularly polarized light S1 becomes right-handed (left-handed) second circularly polarized light S2 after passing through the half-wavelength liquid crystal cell 10.

[0035] When the liquid crystal molecules 1 in the liquid crystal layer 11 of the half-wavelength liquid crystal cell 10 are in the first state, the liquid crystal layer 11 does not produce phase delay for the first circularly polarized light S1 emitted by the display screen 100, that is, the left-handed (right-handed) first circularly polarized light S1 becomes the left-handed (right-handed) second circularly polarized light S2 after passing through the half-wavelength liquid crystal cell 10.

[0036] Furthermore, the left-handed (right-handed) second circularly polarized light S2 is incident on the first circular polarizer 20. The first circular polarizer 20 includes a first quarter-wavelength compensation layer 21 and a first linear polarization layer 22 located on the side of the first quarter-wavelength compensation layer 21 facing away from the half-wavelength liquid crystal cell 10. The first quarter-wavelength compensation layer 21 is configured to convert the second circularly polarized light S2 into first linearly polarized light L1. The first linear polarization layer 22 is configured to transmit linearly polarized light of a specific polarization direction. The angle between the polarization direction of the first linear polarization layer 22 and the slow axis direction of the first quarter-wavelength compensation layer 21 is 45° or -45°.

[0037] It can be understood that since the left-handed (right-handed) second circularly polarized light S2 is formed by the superposition of two beams of linearly polarized light (o light component and e light component) with equal amplitudes, vertical vibration directions and a phase difference of ±π / 2, and the first quarter-wavelength compensation layer 21 will produce an additional π / 2 phase delay, the total phase difference between the two beams of linearly polarized light (o light component and e light component) in the second circularly polarized light S2 becomes 0 or π, and is converted into the first linearly polarized light L1.

[0038] Specifically, after the left-handed second circularly polarized light S2 passes through the first quarter-wavelength compensation layer 21, the angle between the polarization direction of the formed first linear polarized light L1 and the slow axis direction of the first quarter-wavelength compensation layer 21 is 45°, and the angle between the polarization direction and the fast axis direction of the first quarter-wavelength compensation layer 21 is -45°; after the right-handed second circularly polarized light S2 passes through the first quarter-wavelength compensation layer 21, the angle between the polarization direction of the formed first linear polarized light L1 and the slow axis direction of the first quarter-wavelength compensation layer 21 is -45°, and the angle between the polarization direction and the fast axis direction of the first quarter-wavelength compensation layer 21 is 45°.

[0039] In this way, the angle between the polarization direction of the first linear polarization layer 22 and the slow axis direction of the first quarter-wavelength compensation layer 21 is set to 45° or -45°, so that the polarization direction of the first linear polarization light L1 emitted through the first quarter-wavelength compensation layer 21 is parallel to or perpendicular to the polarization direction of the first linear polarization layer 22, so that the first linear polarization light L1 can be emitted through the first linear polarization layer 22 or not.

[0040] Therefore, when the states of the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are always the same, as shown in FIG. Figure 1 and Figure 2 As shown, the first circularly polarized light S1 emitted by the display screen 100 becomes the second circularly polarized light S2 with the same rotation direction after passing through the half-wavelength liquid crystal cells 10 of the left eye lens 210L and the right eye lens 210R respectively, and then becomes the first linearly polarized light L1 with the same polarization direction after passing through the first quarter-wavelength compensation layers 21 of the left eye lens 210L and the right eye lens 210R respectively. In this way, the angle between the polarization direction of the first linear polarization layer 22 of one of the left eye lens 210L and the slow axis direction of the first quarter-wavelength compensation layer 21 is set to 45°, and the angle between the polarization direction of the first linear polarization layer 22 of the other eye lens and the slow axis direction of the first quarter-wavelength compensation layer 21 is set to -45°, so that the first linear polarized light L1 with the same polarization direction is emitted through one of the left eye lens 210L and the right eye lens 210R but not through the other.

[0041] When the states of the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are always different, as shown in FIG. Figure 3 and Figure 4 As shown, after the first circularly polarized light S1 emitted by the display screen 100 passes through the half-wavelength liquid crystal cells 10 of the left eye lens 210L and the right eye lens 210R respectively, one is a left-handed second circularly polarized light S2 and the other is a right-handed second circularly polarized light S2. Further, after passing through the first quarter-wavelength compensation layer 21 of the left eye lens 210L and the right eye lens 210R respectively, the polarization direction of the first linear polarized light L1 emitted from one is perpendicular to the polarization direction of the first linear polarized light L1 emitted from the other. In this way, the angles between the polarization direction of the first linear polarization layer L1 and the slow axis direction of the first quarter-wavelength compensation layer 21 in the left eye lens 210L and the right eye lens 210R are both 45° or -45°, so that the first linear polarized light L1 with perpendicular polarization directions is emitted through one of the left eye lens 210L and the right eye lens 210R but not through the other.

[0042] In this way, the light emitted by the display screen 100 can quickly and alternately pass through the left lens 210L and the right lens 210R of the 3D glasses 200 and be received by the viewer's left eye EL and right eye ER, thereby achieving a 3D display effect.

[0043] Compared to existing 3D glasses, which typically include at least two layers of polarizers in addition to a liquid crystal cell to achieve a 3D display effect, resulting in low light transmittance and affecting the display quality of 3D images, the 3D glasses provided in the embodiment of the present application utilize a half-wavelength liquid crystal cell 10 to perform phase delay control on the circularly polarized light S1 emitted by the display screen 100, and are combined with a first circular polarizer 20 disposed on the side of the half-wavelength liquid crystal cell 10 closest to the viewer's eye to achieve a 3D display effect. Because only the first circular polarizer 20 is disposed in addition to the half-wavelength liquid crystal cell 10, the 3D glasses provided in the present application have a higher light transmittance and an improved 3D image display effect. Moreover, the 3D glasses have a simple structure and are applicable to various display screens. Since the 3D glasses process the circularly polarized light emitted by the display screen, they can be rotated arbitrarily without degrading the display quality. In other words, the 3D glasses provided in the embodiment of the present application are simple in structure, have a full viewing angle, and have a high transmittance.

[0044] like Figures 1-4As shown, the half-wavelength liquid crystal cell 10 includes a first transparent substrate 12 and a second transparent substrate 13 arranged opposite to each other, with a liquid crystal layer 11 located between the first transparent substrate 12 and the second transparent substrate 13. A first transparent electrode 14 and a first alignment layer 15 are stacked on a side of the first transparent substrate 12 close to the liquid crystal layer 11, and a second transparent electrode 16 and a second alignment layer 17 are stacked on a side of the second transparent substrate 13 close to the liquid crystal layer 11. The first transparent electrode 14 and the second transparent electrode 16 are used to apply a driving voltage to the liquid crystal layer 11, and the first alignment layer 15 and the second alignment layer 17 are used to make the liquid crystal molecules 1 in the liquid crystal layer 11 have an initial arrangement direction, and under the control of the driving voltage, make the liquid crystal molecules 1 in the liquid crystal layer 11 rotate.

[0045] It can be understood that the first alignment layer 15 and the second alignment layer 17 can be polyimide (PI) layers, which, under friction treatment, make the initial arrangement direction of the liquid crystal molecules 1 in the liquid crystal layer 11 parallel to the plane where the first transparent substrate 12 is located and the plane where the second transparent substrate 13 is located, or make the initial arrangement direction of the liquid crystal molecules 1 in the liquid crystal layer 11 perpendicular to the plane where the first transparent substrate 12 is located and the plane where the second transparent substrate 13 is located.

[0046] It can also be understood that the first transparent electrode 14 and the second transparent electrode 16 can be indium tin oxide (ITO) transparent electrodes. When the first transparent electrode 14 and the second transparent electrode 16 apply a driving voltage to the liquid crystal layer 11, the arrangement direction of the liquid crystal molecules in the liquid crystal layer 11 changes, resulting in different phase delays.

[0047] Liquid crystal is a liquid crystalline substance, an intermediate state between solid (crystalline) and liquid (amorphous), exhibiting fluidity and anisotropy (optical anisotropy, such as birefringence). Liquid crystal molecules can be thought of as rugby balls, with a major axis and a minor axis. Due to the birefringence of liquid crystals, light propagates in the liquid crystal as o-light and e-light, and the propagation speeds of o-light and e-light are different, resulting in phase retardation. By varying the thickness of the liquid crystal layer 11, the amount of phase retardation produced by the liquid crystal layer 11 can be adjusted.

[0048] Optionally, in some embodiments of the present application, such as Figures 1-4 As shown, the thickness d of the liquid crystal layer 11 can satisfy: d = λ / (2Δn), where Δn is the difference between the refractive index of the liquid crystal molecules 1 in the long axis direction and the refractive index in the short axis direction of the liquid crystal layer 11, and λ is the operating wavelength. In this way, when the driving voltage applied to the liquid crystal layer 11 is adjusted to a specific voltage (i.e., half-wave voltage), the liquid crystal layer 11 generates a half-wave delay, satisfying Δn·d = λ / 2, that is, the liquid crystal layer 11 generates a π phase delay.

[0049] Optionally, in some embodiments of the present application, such as Figures 1-4 As shown, when the liquid crystal molecules 1 in the liquid crystal layer 11 are in a first state, the liquid crystal molecules in the liquid crystal layer 11 are arranged along a first direction X, which is parallel to the plane of the first transparent substrate 12 and the plane of the second transparent substrate 13. At this time, the arrangement direction of the liquid crystal molecules in the liquid crystal layer 11 is parallel to the plane of the first transparent substrate 12 and the plane of the second transparent substrate 13, and the liquid crystal layer 11 can produce a π phase delay. When the liquid crystal molecules 1 in the liquid crystal layer 11 are in a second state, the liquid crystal molecules 1 in the liquid crystal layer 11 are arranged along a second direction Y, which is perpendicular to the plane of the first transparent substrate 12 and the plane of the second transparent substrate 13. At this time, the arrangement direction of the liquid crystal molecules in the liquid crystal layer 11 is perpendicular to the plane of the first transparent substrate 12 and the plane of the second transparent substrate 13, and the liquid crystal layer 11 does not produce a phase delay.

[0050] Further optionally, in some embodiments of the present application, such as Figures 1-4 As shown, in the left eyeglass 210L and the right eyeglass 210R, the initial arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 is the first direction X, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 is changed to the second direction Y.

[0051] Further another optional, in some embodiments of the present application, such as Figures 1-4 As shown, in the left eyeglass 210L and the right eyeglass 210R, the initial arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 is the second direction Y, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 is changed to the first direction X.

[0052] In the above two cases, if the first transparent electrodes 14 and the second transparent electrodes 16 of the left eye lens 210L and the right eye lens 210R are simultaneously driven by voltage, or are not driven by voltage, the states of the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are always the same, such as Figure 1 and Figure 2As shown, the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are either in the first state at the same time, generating a π phase delay, or in the second state at the same time, generating no phase delay. Therefore, the first circularly polarized light S1 emitted by the display screen 100 is converted into the second circularly polarized light S2 with the same rotation direction after passing through the half-wavelength liquid crystal cell 10 of the left eye lens 210L and the right eye lens 210R, and then is converted into the same second circularly polarized light S2 after passing through the first quarter-wavelength compensation layer 21 of the left eye lens 210L and the right eye lens 210R. The first linear polarized light L1 of the polarization direction is set. At this time, the left eyeglass 210L and the right eyeglass 220R are set so that the angle between the polarization direction of the first linear polarization layer 22 of one and the slow axis direction of the first quarter-wavelength compensation layer 21 is 45°, and the angle between the polarization direction of the first linear polarization layer 22 of the other and the slow axis direction of the first quarter-wavelength compensation layer 21 is -45°, so that the first linear polarized light L1 with the same polarization direction is emitted through one of the left eyeglass 210L and the right eyeglass 210R, but not through the other.

[0053] If a driving voltage is applied to the first transparent electrode 14 and the second transparent electrode 16 of one of the left eye lens 210L and the right eye lens 210R, and no driving voltage is applied to the first transparent electrode 14 and the second transparent electrode 16 of the other eye lens, the states of the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are always different, such as Figure 3 and Figure 4 As shown, either the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L are in the first state, generating a π phase delay, while the liquid crystal molecules in the liquid crystal layer 11 of the right eye lens 210R are in the second state, generating no phase delay, or the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L are in the second state, generating no phase delay, while the liquid crystal molecules in the liquid crystal layer 11 of the right eye lens 210R are in the second state, generating a π phase delay. As a result, after the first circularly polarized light S1 emitted by the display screen 100 passes through the half-wavelength liquid crystal cells 10 of the left eye lens 210L and the right eye lens 210R, one is a left-handed second circularly polarized light S2, and the other is a left-handed second circularly polarized light S3. It is a right-handed second circularly polarized light S2, and then after passing through the first quarter-wavelength compensation layer 21 of the left eyeglass 210L and the right eyeglass 210R respectively, the polarization direction of the first linear polarized light L1 emitted by one is perpendicular to the polarization direction of the first linear polarized light L1 emitted by the other. At this time, the left eyeglass 210L and the right eyeglass 210R are set, and the angles between the polarization direction of the first linear polarization layer L1 and the slow axis direction of the first quarter-wavelength compensation layer 21 are both 45° or -45°, so that the first linear polarized light L1 with polarization directions perpendicular to each other is emitted through one of the left eyeglass 210L and the right eyeglass 210R, but not through the other.

[0054] When the liquid crystal molecules 1 in the liquid crystal layer 11 are in the first state, the liquid crystal molecules 1 in the liquid crystal layer 11 are arranged along a first direction X, and the first direction X is parallel to the plane where the first transparent substrate 12 and the plane where the second transparent substrate 13 are located. When the liquid crystal molecules 1 in the liquid crystal layer 11 are in the second state, the liquid crystal molecules 1 in the liquid crystal layer 11 are arranged along a second direction Y, and the second direction Y is perpendicular to the plane where the first transparent substrate 12 and the plane where the second transparent substrate 13 are located. Further, another option is provided in some embodiments of the present application, such as Figures 1-4 As shown, in the left eyeglass 210L and the right eyeglass 210R, the initial arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 of one is the first direction X, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 is changed to the second direction Y; the initial arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 of the other eyeglass is the second direction Y, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules 1 of the liquid crystal layer 11 is changed to the first direction X.

[0055] In this case, if the first transparent electrodes 14 and the second transparent electrodes 16 of the left eye lens 210L and the right eye lens 210R are simultaneously driven by voltage, or are not driven by voltage, the states of the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are always different, such as Figure 3 and Figure 4 As shown, either the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L are in the first state, generating a π phase delay, while the liquid crystal molecules in the liquid crystal layer 11 of the right eye lens 210R are in the second state, generating no phase delay, or the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L are in the second state, generating no phase delay, while the liquid crystal molecules in the liquid crystal layer 11 of the right eye lens 210R are in the second state, generating a π phase delay. As a result, after the first circularly polarized light S1 emitted by the display screen 100 passes through the half-wavelength liquid crystal cells 10 of the left eye lens 210L and the right eye lens 210R, one is a left-handed second circularly polarized light S2, and the other is a left-handed second circularly polarized light S3. It is a right-handed second circularly polarized light S2, and then after passing through the first quarter-wavelength compensation layer 21 of the left eyeglass 210L and the right eyeglass 210R respectively, the polarization direction of the first linear polarized light L1 emitted by one is perpendicular to the polarization direction of the first linear polarized light L1 emitted by the other. At this time, the left eyeglass 210L and the right eyeglass 210R are set, and the angles between the polarization direction of the first linear polarization layer L1 and the slow axis direction of the first quarter-wavelength compensation layer 21 are both 45° or -45°, so that the first linear polarized light L1 with polarization directions perpendicular to each other is emitted through one of the left eyeglass 210L and the right eyeglass 210R, but not through the other.

[0056] If a driving voltage is applied to the first transparent electrode 14 and the second transparent electrode 16 of one of the left eye lens 210L and the right eye lens 210R, and no driving voltage is applied to the first transparent electrode 14 and the second transparent electrode 16 of the other eye lens, the states of the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are always the same, as shown in FIG. Figure 1 and Figure 2 As shown, the liquid crystal molecules in the liquid crystal layer 11 of the left eye lens 210L and the right eye lens 210R are either in the first state at the same time, generating a π phase delay, or in the second state at the same time, generating no phase delay. Therefore, the first circularly polarized light S1 emitted by the display screen 100 is converted into the second circularly polarized light S2 with the same rotation direction after passing through the half-wavelength liquid crystal cell 10 of the left eye lens 210L and the right eye lens 210R, and then is converted into the same second circularly polarized light S2 after passing through the first quarter-wavelength compensation layer 21 of the left eye lens 210L and the right eye lens 210R. The first linear polarized light L1 of the polarization direction is set. At this time, the left eyeglass 210L and the right eyeglass 220R are set so that the angle between the polarization direction of the first linear polarization layer 22 of one and the slow axis direction of the first quarter-wavelength compensation layer 21 is 45°, and the angle between the polarization direction of the first linear polarization layer 22 of the other and the slow axis direction of the first quarter-wavelength compensation layer 21 is -45°, so that the first linear polarized light L1 with the same polarization direction is emitted through one of the left eyeglass 210L and the right eyeglass 210R, but not through the other.

[0057] Based on any of the above embodiments, optionally, in some embodiments of the present application, the first quarter-wavelength compensation layer 21 is a quarter-wavelength glass plate, and the first linear polarization layer 22 is a linear polarizer. However, the present application does not limit the specific structure of the first quarter-wavelength compensation layer 21; as long as the first quarter-wavelength compensation layer 21 can generate a quarter-wavelength retardation (i.e., a phase retardation of π / 2), it will suffice. Similarly, the present application does not limit the specific structure of the first linear polarization layer 22; as long as the first linear polarization layer 22 is used to transmit linearly polarized light of a specific polarization direction, it will suffice.

[0058] The above embodiments describe in detail the structure and working principle of the 3D glasses 200 in the 3D image display system provided in the embodiments of the present application. In addition, the above embodiments are described on the basis that the display screen 100 in the 3D image display system provided in the embodiments of the present application emits circularly polarized light (i.e., the first circularly polarized light S1). The following describes how the display screen 100 in the 3D image display system provided in the embodiments of the present application emits circularly polarized light (i.e., the first circularly polarized light S1).

[0059] like Figures 1-4As shown, the display screen 100 includes a display module 110 and a second circular polarizer 120 located on the display surface side of the display module 110. The second circular polarizer 120 includes a second linear polarization layer 30 and a second quarter-wavelength compensation layer 40 located on the side of the second linear polarization layer 30 away from the display module 110. The angle between the polarization direction of the second linear polarization layer 30 and the slow axis direction of the second quarter-wavelength compensation layer 40 is 45° or -45°; the light emitted by the display module 110 is converted into second linear polarized light L2 after passing through the second linear polarization layer 30, and the second linear polarized light L2 is converted into first circular polarized light S1 after passing through the second quarter-wavelength compensation layer 40.

[0060] It is understandable that, since the second linear polarization layer 30 is used to transmit linearly polarized light with a specific polarization direction, the light emitted by the display module 110 (similar to natural light) becomes the second linear polarized light L2 after passing through the second linear polarization layer 30 .

[0061] Furthermore, the second linearly polarized light L2 is incident on the second quarter-wavelength compensation layer 40. The second quarter-wavelength compensation layer 40 is used to convert the second linearly polarized light L2 into the first circularly polarized light S1. Specifically, since the angle between the polarization direction of the second linear polarization layer 30 and the slow axis direction of the second quarter-wavelength compensation layer 40 is 45° or -45°, the second linear polarized light L2 emitted by the second linear polarization layer 30 will be decomposed into two orthogonal components (i.e., the o-light component and the e-light component) along the fast axis and slow axis of the second quarter-wavelength compensation layer 40 in the second quarter-wavelength compensation layer 40. The amplitudes of these two orthogonal components (i.e., the o-light component and the e-light component) are equal, and these two orthogonal components (i.e., the o-light component and the e-light component) produce a phase delay of π / 2 (i.e., λ / 4 delay). The two orthogonal vibration components (i.e., the o-light component and the e-light component) with equal amplitudes and a phase difference of π / 2 are synthesized to form circularly polarized light (i.e., the first circularly polarized light S1). The rotation direction of the formed circularly polarized light (i.e., the first circularly polarized light S1) is determined by the directions of the fast axis and the slow axis of the second quarter-wavelength compensation layer 40.

[0062] In this way, the light emitted by the display module 110 is converted into second linearly polarized light L2 after passing through the second linear polarization layer 30. The second linearly polarized light L2 is then converted into first circularly polarized light S1 after passing through the second quarter-wavelength compensation layer 40. Then, the first circularly polarized light S1 is incident on the 3D glasses 200, alternately passes through the left lens 210L and the right lens 210R of the 3D glasses 200, and is received by the viewer's left eye EL and right eye ER, thereby achieving a 3D display effect.

[0063] Optionally, in some embodiments of the present application, the second quarter-wavelength compensation layer 40 is a quarter-wavelength glass plate, and the second linear polarization layer 30 is a linear polarizer. However, the present application does not limit the specific structure of the second quarter-wavelength compensation layer 40; as long as the second quarter-wavelength compensation layer 40 can generate a quarter-wavelength retardation (i.e., a phase retardation of π / 2), it will suffice. Similarly, the present application does not limit the specific structure of the second linear polarization layer 30; as long as the second linear polarization layer 30 is used to transmit linearly polarized light of a specific polarization direction, it will suffice.

[0064] Optionally, in some embodiments of the present application, the display module 110 is a liquid crystal display module. As is known, a liquid crystal display module typically has a linear polarization layer on its display surface. This linear polarization layer can be used directly as the second linear polarization layer 30, and a second quarter-wavelength compensation layer 40 can be attached to enable the display screen 100 to emit the first circularly polarized light S1. Of course, the linear polarization layer on the display surface of the liquid crystal display module can also be removed, and a second circular polarizer 120 can be attached to the display surface of the liquid crystal display module to enable the display screen 100 to emit the first circularly polarized light S1.

[0065] Alternatively, in some embodiments of the present application, the display module 110 may be an organic light-emitting diode (OLED) display module or an LED display module. It is understood that when the display module 110 is an organic light-emitting diode (OLED) display module or an LED display module, a second circular polarizer 120 is attached to the display surface of the OLED display module or the LED display module, so that the display screen 100 emits the first circularly polarized light S1.

[0066] The various parts in this manual are described in a combination of parallel and progressive manners. Each part focuses on the differences from other parts, and the same or similar parts between the various parts can be referenced to each other.

[0067] With respect to the above description of the disclosed embodiments, the features described in the various embodiments in this specification may be interchanged or combined with one another to enable those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A 3D glasses, characterized in that: The invention comprises a left eye lens and a right eye lens, wherein the left eye lens and the right eye lens each comprise: a half-wavelength liquid crystal cell for controlling the phase delay of first circularly polarized light emitted by the display screen; the half-wavelength liquid crystal cell includes a liquid crystal layer; under the control of a driving voltage, liquid crystal molecules in the liquid crystal layer are in a first state or a second state; when the liquid crystal molecules in the liquid crystal layer are in the first state, the liquid crystal layer generates a π phase delay; when the liquid crystal molecules in the liquid crystal layer are in the second state, the liquid crystal layer generates no phase delay; the first circularly polarized light emitted by the display screen is converted into second circularly polarized light after passing through the half-wavelength liquid crystal cell; a first circular polarizer, located on a side of the half-wavelength liquid crystal cell close to the viewer's eyes; the first circular polarizer comprises a first quarter-wavelength compensation layer and a first linear polarization layer located on a side of the first quarter-wavelength compensation layer away from the half-wavelength liquid crystal cell; the first quarter-wavelength compensation layer is configured to convert the second circularly polarized light into a first linearly polarized light, and an angle between a polarization direction of the first linear polarization layer and a slow axis direction of the first quarter-wavelength compensation layer is 45° or -45°; When the states of liquid crystal molecules in the liquid crystal layers of the left eye lens and the right eye lens are the same, the angle between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer of one of the left eye lens and the right eye lens is 45°, and the angle between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer of the other of the left eye lens and the right eye lens is -45°; When the states of the liquid crystal molecules in the liquid crystal layers of the left eye lens and the right eye lens are different, in the left eye lens and the right eye lens, the angles between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer are both 45° or -45°.

2. The 3D glasses according to claim 1, wherein: The half-wavelength liquid crystal cell comprises: a first transparent substrate and a second transparent substrate arranged opposite to each other, wherein the liquid crystal layer is located between the first transparent substrate and the second transparent substrate; A first transparent electrode and a first alignment layer are stacked on a side of the first transparent substrate close to the liquid crystal layer, and a second transparent electrode and a second alignment layer are stacked on a side of the second transparent substrate close to the liquid crystal layer, wherein the first transparent electrode and the second transparent electrode are used to apply the driving voltage to the liquid crystal layer, and the first alignment layer and the second alignment layer are used to make the liquid crystal molecules in the liquid crystal layer have an initial arrangement direction, and under the control of the driving voltage, make the liquid crystal molecules in the liquid crystal layer rotate.

3. The 3D glasses according to claim 2, wherein: The thickness d of the liquid crystal layer satisfies: d=λ / (2Δn), wherein Δn is the difference between the refractive index of the liquid crystal molecules in the long axis direction and the refractive index of the liquid crystal molecules in the liquid crystal layer in the short axis direction, and λ is the operating wavelength.

4. The 3D glasses according to claim 2, wherein: When the liquid crystal molecules in the liquid crystal layer are in a first state, the liquid crystal molecules in the liquid crystal layer are arranged along a first direction, and the first direction is parallel to the plane where the first transparent substrate is located and the plane where the second transparent substrate is located; When the liquid crystal molecules in the liquid crystal layer are in the second state, the liquid crystal molecules in the liquid crystal layer are arranged along a second direction, and the second direction is perpendicular to the plane where the first transparent substrate and the plane where the second transparent substrate are located.

5. The 3D glasses according to claim 4, wherein: In the left eye lens and the right eye lens, the initial arrangement direction of the liquid crystal molecules in the liquid crystal layer is the first direction, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules in the liquid crystal layer is changed to the second direction.

6. The 3D glasses according to claim 4, wherein: In the left eye lens and the right eye lens, the initial arrangement direction of the liquid crystal molecules in the liquid crystal layer is the second direction, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules in the liquid crystal layer is changed to the first direction.

7. The 3D glasses according to claim 5 or 6, characterized in that: The driving voltage is applied to the first transparent electrode and the second transparent electrode of the left eye lens and the right eye lens at the same time, or the driving voltage is not applied to the first transparent electrode and the second transparent electrode at the same time; In the left eye lens and the right eye lens, the angle between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter wavelength compensation layer of one is 45°, and the angle between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter wavelength compensation layer of the other is -45°.

8. The 3D glasses according to claim 5 or 6, characterized in that: The driving voltage is applied to the first transparent electrode and the second transparent electrode of one of the left eye lens and the right eye lens, and the driving voltage is not applied to the first transparent electrode and the second transparent electrode of the other eye lens; In the left-eye lens and the right-eye lens, the angles between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer are both 45° or -45°.

9. The 3D glasses according to claim 4, wherein: In the left eye lens and the right eye lens, the initial arrangement direction of the liquid crystal molecules in the liquid crystal layer of one is the first direction, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules in the liquid crystal layer is changed to the second direction; in the other eye lens, the initial arrangement direction of the liquid crystal molecules in the liquid crystal layer is the second direction, and under the control of the driving voltage, the arrangement direction of the liquid crystal molecules in the liquid crystal layer is changed to the first direction.

10. The 3D glasses according to claim 9, wherein: The driving voltage is applied to the first transparent electrode and the second transparent electrode of the left eye lens and the right eye lens at the same time, or the driving voltage is not applied to the first transparent electrode and the second transparent electrode at the same time; In the left-eye lens and the right-eye lens, the angles between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter-wavelength compensation layer are both 45° or -45°.

11. The 3D glasses according to claim 9, wherein: The driving voltage is applied to the first transparent electrode and the second transparent electrode of one of the left eye lens and the right eye lens, and the driving voltage is not applied to the first transparent electrode and the second transparent electrode of the other eye lens; In the left eye lens and the right eye lens, the angle between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter wavelength compensation layer of one is 45°, and the angle between the polarization direction of the first linear polarization layer and the slow axis direction of the first quarter wavelength compensation layer of the other is -45°.

12. The 3D glasses according to claim 1, wherein: The first quarter-wavelength compensation layer is a quarter-wavelength glass plate, and the first linear polarization layer is a linear polarizer.

13. A 3D image display system, characterized in that: include: A display screen, comprising a display module and a second circular polarizer located on a display surface side of the display module, the second circular polarizer comprising a second linear polarization layer and a second quarter-wavelength compensation layer located on a side of the second linear polarization layer facing away from the display module, wherein the angle between the polarization direction of the second linear polarization layer and the slow axis direction of the second quarter-wavelength compensation layer is 45° or −45°; light emitted from the display module becomes second linearly polarized light after passing through the second linear polarization layer, and the second linearly polarized light becomes first circularly polarized light after passing through the second quarter-wavelength compensation layer; 3D glasses, wherein the 3D glasses are the 3D glasses according to any one of claims 1 to 12.

14. The 3D image display system according to claim 13, wherein: The second quarter-wavelength compensation layer is a quarter-wavelength glass plate, and the second linear polarization layer is a linear polarizer.

15. The 3D image display system according to claim 13, wherein: The display module is a liquid crystal display module, an organic light emitting diode display module or a light emitting diode display module.

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