CN114609797A - 2D/3D switchable display system - Google Patents
2D/3D switchable display system Download PDFInfo
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- CN114609797A CN114609797A CN202011402471.7A CN202011402471A CN114609797A CN 114609797 A CN114609797 A CN 114609797A CN 202011402471 A CN202011402471 A CN 202011402471A CN 114609797 A CN114609797 A CN 114609797A
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- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 claims abstract description 131
- 230000000694 effects Effects 0.000 claims abstract description 43
- 230000000007 visual effect Effects 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 79
- 239000004973 liquid crystal related substance Substances 0.000 claims description 22
- 239000011159 matrix material Substances 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 4
- 210000004556 brain Anatomy 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
- G02B30/28—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays involving active lenticular arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
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- Optics & Photonics (AREA)
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Abstract
The application provides a switchable display system of 2D/3D, include: the display screen comprises a light source for emitting light, a display screen for displaying image content carried by the light and a polymer dispersed liquid crystal film, wherein the film is arranged on one side of the display screen, which is opposite to the light source, and has a scattering state and a transmission state, so that the image content with different visual angles and penetrating through the display screen can show a 2D or 3D display effect. The system can rapidly realize real-time switching of 2D/3D display and has lower cost.
Description
Technical Field
The present application relates to the field of image display, and more particularly, to a switchable 2D/3D display system.
Background
In the display field, a display screen provides relevant information to a viewer, but the existing display screen generally provides two-dimensional (2D) display information and has no stereoscopic display effect. Three-dimensional (3D) display is gaining more attention due to the stereoscopic display effect, and although 3D display technology has many advantages, the existing 3D display technology also has some disadvantages: such as limited field angle, and is prone to cause visual fatigue. To solve the problem, a display technology that 2D display and 3D display can be switched in real time is provided, and 2D display or 3D display can be realized according to the needs of viewers.
Disclosure of Invention
The present application provides a 2D/3D switchable display system, which may include: the display screen comprises a light source for emitting light, a display screen for displaying image content and a polymer dispersed liquid crystal film, wherein the film is arranged on one side of the display screen, which is opposite to the light source, and has a scattering state and a transmission state, so that the image content of different visual angles in the light passing through the display screen can show a 2D or 3D display effect.
Further, the 2D/3D switchable display system provided by the present application may further include: a diffractive optical element. Illustratively, the diffractive optical element is disposed between the light source and the polymer dispersed liquid crystal film.
In one embodiment, the diffractive optical element is disposed on the optical path of the light for separating the light emitted from the light source into light beams with different viewing angles, and the display screen receives the light beams with different viewing angles from the diffractive optical element to display image contents with different viewing angles according to the light beams.
In one embodiment, the diffractive optical element is disposed on a side of the display screen opposite to the light source, and is configured to separate image content displayed by the light source after the light source is loaded on the display screen into image content with different viewing angles, and project the image content to the polymer dispersed liquid crystal film.
In one embodiment, a polymer dispersed liquid crystal film includes: an organic solid polymer matrix; and a plurality of liquid crystal droplets dispersed within an organic solid polymer matrix; wherein, in the absence of an applied electric field, the optical axes of at least a portion of the liquid crystal droplets are not parallel to each other.
In one example, a 2D/3D switchable display system provided by the present application may further include: and the voltage control system is used for controlling the electrifying voltage applied to the polymer dispersed liquid crystal film so as to change the state of the polymer dispersed liquid crystal film, so that the image contents of different visual angles in the light rays passing through the display screen show a 2D or 3D display effect.
In one example, the voltage control system is configured to adjust the power-on voltage to make the polymer dispersed liquid crystal film in a transmissive state, so that the image contents of different viewing angles show a 3D display effect after transmitting through the polymer dispersed liquid crystal film.
In another example, when the voltage control system stops supplying power to the polymer dispersed liquid crystal film, the polymer dispersed liquid crystal film is in a scattering state to directly scatter image contents of different viewing angles, so that the image contents can be displayed in a 2D display effect.
In one embodiment, the polymer dispersed liquid crystal film is disposed on a side closest to a viewer.
In an exemplary embodiment, the diffractive optical element is proximate to a first side of the display screen and the polymer-dispersed liquid crystal film is attached to the display screen on a second side of the display screen opposite the first side.
In an exemplary embodiment, the diffractive optical element is located immediately adjacent to the side of the display screen facing away from the light source, and the side of the diffractive optical element remote from the display screen is attached to the polymer-dispersed liquid crystal film.
In one embodiment, the diffractive optical element is a pixelated grating.
In one embodiment, the display screen is an LCD, LED, OLED or Mirco-LED.
The present application also provides a method of manufacturing a 2D/3D switchable display system, the method including: a light source arranged to emit light; a display screen for displaying image content is arranged on a light path of the light; and arranging a polymer dispersed liquid crystal film with a scattering state and a transmission state on one side of the display screen opposite to the light source so as to enable the image contents of different visual angles in the light rays penetrating through the display screen to show a 2D or 3D display effect.
In one embodiment, the method further comprises: and a diffractive optical element is arranged on a light path of the light emitted by the light source and used for separating the light emitted by the light source into light rays with different viewing angles, wherein the display screen receives the light rays with different viewing angles from the diffractive optical element so as to display image contents with different viewing angles according to the light rays.
In one embodiment, the method further comprises: and a diffractive optical element is arranged on one side of the display screen, which is opposite to the light source, and is used for separating the image content displayed on the display screen into image content with different visual angles and projecting the image content to the polymer dispersed liquid crystal film.
In one embodiment, the method further comprises: and the voltage control system is used for controlling the electrified voltage applied to the polymer dispersed liquid crystal film so as to change the state of the polymer dispersed liquid crystal film, thereby displaying the 2D or 3D display effect of the image contents of different visual angles in the light rays penetrating through the display screen.
In one embodiment, the voltage control system is configured to adjust the power-on voltage to make the polymer dispersed liquid crystal film in a transmissive state, so that the image contents with different viewing angles show a 3D display effect after transmitting through the polymer dispersed liquid crystal film.
In one embodiment, when the voltage control system stops supplying power to the polymer dispersed liquid crystal film, the polymer dispersed liquid crystal film is in a scattering state and directly scatters image contents of different viewing angles, so that the image contents can be displayed in a 2D display effect.
In one embodiment, the polymer dispersed liquid crystal film is disposed on a side closest to a viewer.
In one embodiment, the diffractive optical element is proximate to a first side of the display screen to which the polymer-dispersed liquid crystal film is attached at a second side of the display screen opposite the first side.
In one embodiment, the diffractive optical element is located immediately adjacent to the side of the display facing away from the light source, and the side of the diffractive optical element remote from the display is attached to the polymer-dispersed liquid crystal film.
The 2D/3D switchable display system can rapidly realize real-time switching of 2D/3D display by changing the voltage applied to the polymer dispersed liquid crystal film; and the polymer dispersed liquid crystal film has low cost, and compared with the two display screens, the scheme provided by the application has low cost.
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Other features, objects, and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings. Wherein:
fig. 1 is an exemplary system architecture diagram of a 2D/3D switchable display system according to an embodiment of the present application;
FIG. 2 is an exemplary system architecture diagram of a 2D/3D switchable display system according to another embodiment of the present application;
FIG. 3 is a 2D/3D switchable in-vehicle display system according to another embodiment of the present application;
fig. 4 is contents seen by left and right eyes of a driver in 3D display according to another embodiment of the present application;
fig. 5 is a view of the left and right eyes of a driver in a 2D display according to another embodiment of the present application;
FIG. 6 is another 2D/3D switchable in-vehicle display system according to another embodiment of the present application;
FIG. 7 is a 2D/3D switchable home theater display system according to another embodiment of the present application;
fig. 8 is contents viewed by left and right eyes of a viewer in a 3D display according to another embodiment of the present application;
FIG. 9 is a view of a viewer's left and right eyes during 2D display according to another embodiment of the present application; and
fig. 10 is a flowchart of a method of manufacturing a 2D/3D switchable display system according to an embodiment of the present application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any one of the items listed in relation and any combination of any two or more. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
The features described in this application may be embodied in different forms and should not be construed as limited to the examples described in this application. Rather, the examples described in this application are provided merely to illustrate some of the many possible ways to implement the methods, apparatuses, and/or systems described in this application, which will be apparent after understanding the disclosure of this application.
Use of the word "may" with respect to an example or embodiment (e.g., with respect to what an example or embodiment may include or implement) means that there is at least one example or embodiment that includes or implements such a feature, and all examples or embodiments are not limited thereto.
It should be noted that in the present description, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not indicate any limitation on the features, and do not particularly indicate any precedence order.
In the drawings, the thickness, size, and shape of each component may have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.
Throughout the specification, when an element is described as being "on," "connected to" or "coupled to" another element, for example, it can be directly on, "connected to" or "coupled to" the other element, or one or more other elements may be present between the element and the other element. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there may be no other elements intervening between the element and the other element.
Spatially relative terms, such as "above … …," "upper," "below … …," and "lower," may be used herein for ease of description to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be "below" or "lower" relative to the other elements. Thus, the phrase "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears in the list of listed features, that statement modifies all features in the list rather than merely individual elements in the list.
As used herein, the terms "approximately," "about," and the like are used as words of table approximation and not as words of table degree, and are intended to account for inherent deviations in measured or calculated values that can be appreciated by one of ordinary skill in the art.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In addition, unless explicitly defined or contradicted by context, the specific steps included in the methods described herein are not necessarily limited to the order described, but can be performed in any order or in parallel.
The 2D/3D switchable display system according to an embodiment of the present application may include a light source for emitting light carrying image content, and a display screen for displaying the image content, wherein the system further includes: the polymer dispersed liquid crystal film is arranged on one side of the display screen, which is opposite to the light source, and has a scattering state and a transmission state, so that the image content with different visual angles after penetrating through the display screen presents a 2D or 3D display effect. Exemplary embodiments of the present application will be described in detail below with reference to fig. 1 and 2.
Fig. 1 illustrates a 2D/3D switchable display system 100 according to an embodiment of the present application. As shown, the 2D/3D switchable display system 100 may include a light source 10, a diffractive optical element 20, a display screen 30, a polymer dispersed liquid crystal film 40, and a voltage control system 50. The light source 10 may be disposed at the foremost side of the 2D/3D switchable display system 100, and may emit light; the diffractive optical element 20 can separate the light emitted by the light source 10 into light rays with different viewing angles, the diffractive optical element 20 can be arranged close to the display screen 30, and then the light rays with different viewing angles carry or display different image contents after passing through the display screen 30; the display screen 30 can display the light rays with different viewing angles as image contents with different viewing angles; the polymer dispersed liquid crystal film 40 can transmit image contents of different viewing angles through the polymer dispersed liquid crystal film 40 to form a 3D display effect, or can scatter the image contents of different viewing angles to form a 2D display effect; the voltage control system 50 may control the energization voltage applied to the polymer dispersed liquid crystal film 40.
Further, as shown in fig. 1, in the 2D/3D switchable display system 100, the diffractive optical element 20 is disposed on the optical path of the light emitted from the light source 10, and is close to one side of the display screen 30 close to the light source 10, for separating the light emitted from the light source into lights with different viewing angles. The display 30 receives light from the diffractive optical element 20 at different viewing angles and allows the transmitted light to display image content at different viewing angles. Specifically, the light rays of each perspective carry image content of the corresponding perspective. Specifically, the diffractive optical element 20 is positioned against a first side of the display 30, and the polymer dispersed liquid crystal film 40 is attached to the display 30 on a second side of the display 30 opposite the first side.
In an exemplary embodiment, polymer dispersed liquid crystal film 40 includes an organic solid polymer matrix and liquid crystal droplets dispersed and distributed within the organic solid polymer matrix. The size of the liquid crystal droplets is in the order of microns.
Since the liquid crystal is dispersed in the form of droplets of the order of micrometers within the organic solid polymer matrix and the optical axes of the droplets of liquid crystal molecules are in a free orientation, the refractive index of the liquid crystal droplets does not match the refractive index of the organic solid polymer matrix. When light passes through the polymer dispersed liquid crystal film 40, it is strongly scattered by the liquid crystal droplets, and the polymer dispersed liquid crystal film 40 is in an opaque milky white state or a translucent state.
Further, when the image contents of different viewing angles displayed on the display screen 30 reach the polymer dispersed liquid crystal film 40, the voltage control system 50 applies different power-on voltages to the polymer dispersed liquid crystal film 40. Two situations can arise:
in the first case, when the voltage control system 50 is configured to adjust the energizing voltage, the applied electric field can adjust the optical axis orientation of the droplets of the polymer-dispersed liquid crystal film 40, which can cause the polymer-dispersed liquid crystal film 40 to assume a transparent state when the refractive indices of the droplets and the organic solid polymer matrix are matched. Thereby enabling the image contents with different viewing angles to show a 3D display effect after transmitting through the polymer dispersed liquid crystal film 40.
In the second case, when the voltage control system 50 is configured to stop supplying power to the polymer-dispersed liquid crystal film 40, that is, when the voltage applied to the polymer-dispersed liquid crystal film 40 is 0, the liquid crystal droplets of the polymer-dispersed liquid crystal film 40 recover to the original light scattering state, that is, the polymer-dispersed liquid crystal film 40 has a scattering effect, and can directly scatter the image contents at different viewing angles, thereby displaying the image contents in 2D.
Fig. 2 shows a 2D/3D switchable display system 100' according to another embodiment of the present application. As shown, the 2D/3D switchable display system 100' may include a light source 10, a display screen 30, a diffractive optical element 20, a polymer dispersed liquid crystal film 40, and a voltage control system 50. The light source 10 may be disposed at the foremost part of the 2D/3D switchable display system 100' and may emit light; the display screen 30 can load and display image contents and enables the light emitted by the light source 10 to have the displayed image contents; the diffractive optical element 20 may be disposed proximate to the display screen 30, and may separate displayed image content into image content of different viewing angles; the polymer dispersed liquid crystal film 40 can transmit image contents of different viewing angles through the polymer dispersed liquid crystal film 40 to form a 3D display effect, or can scatter the image contents of different viewing angles to form a 2D display effect; the voltage control system 50 may control the energization voltage applied to the polymer dispersed liquid crystal film 40.
Further, as shown in fig. 2, in the 2D/3D switchable display system 100', the diffractive optical element 20 is disposed close to a side of the display screen 30 opposite to the light source 10, for separating image contents displayed on the display screen 30 into image contents of different viewing angles and projecting toward the polymer dispersed liquid crystal film 40. Specifically, the diffractive optical element 20 is disposed close to the side of the display screen 30 facing away from the light source, and the side of the diffractive optical element 20 away from the display screen 30 is attached to the polymer dispersed liquid crystal film 40.
Since the liquid crystal is dispersed in the form of droplets of the order of micrometers within the organic solid polymer matrix and the optical axes of the droplets of liquid crystal molecules are in a free orientation, the refractive index of the liquid crystal droplets does not match the refractive index of the organic solid polymer matrix. When light passes through the polymer dispersed liquid crystal film 40, it is strongly scattered by liquid crystal droplets, and the polymer dispersed liquid crystal film 40 is in an opaque milky white state or a translucent state.
Further, when the image contents of different viewing angles separated by the diffractive optical element 20 reach the polymer-dispersed liquid crystal film 40, different energization voltages are applied to the polymer-dispersed liquid crystal film 40 according to the voltage control system 50. Two cases can then arise: first, when the voltage control system 50 is configured to adjust the energizing voltage, the application of the electric field can adjust the optical axis orientation of the liquid crystal droplets of the polymer dispersed liquid crystal film 40, and when the refractive indices of the liquid crystal droplets and the organic solid polymer matrix of the polymer dispersed liquid crystal film 40 are matched, the polymer dispersed liquid crystal film 40 can be made to assume a transparent state. Thereby enabling the image contents with different viewing angles to show a 3D display effect after transmitting through the polymer dispersed liquid crystal film 40. Secondly, when the voltage control system 50 is configured to stop supplying power to the polymer-dispersed liquid crystal film 40, that is, the voltage applied to the polymer-dispersed liquid crystal film 40 is 0, the liquid crystal droplets of the polymer-dispersed liquid crystal film 40 recover to the original light scattering state, that is, the polymer-dispersed liquid crystal film 40 has a scattering effect, and can directly scatter image contents at different viewing angles, so as to display the image contents in 2D.
Referring to fig. 1 and 2, comparing the arrangement of the 2D/3D switchable display system 100 and the 2D/3D switchable display system 100', it will be understood that when the diffractive optical element 20 is disposed on the side of the display screen 30 close to the light source 10 (as shown in fig. 1) close to the display screen 30, it is more beneficial for the viewer to receive a good viewing effect. Specifically, when the outside is irradiated by strong light, if the diffractive optical element 20 is disposed on a side of the display screen 30 away from the light source, i.e., closer to the viewer, as shown in fig. 2, the diffractive optical element 20 may generate a glare effect (rainbow fringes generated by diffraction of the grating), interfere with the definition of the image, and affect the normal viewing of the viewer; if the diffractive optical element 20 is disposed on a side of the display screen 30 close to the light source, i.e., on the light path from the light source 10 to the display screen 30, as shown in fig. 1, when strong light is irradiated from the outside, the strong light is irradiated onto the surface of the display screen 30 and does not irradiate onto the diffractive optical element 20, and at this time, the image definition is not changed, and the viewer can watch the image normally. Illustratively, the diffractive optical element 20 may be disposed in close proximity to the display screen 20.
In some embodiments, the diffractive optical element 20 is disposed on the optical path of the light emitted from the light source 10, on a side of the display 30 close to the light source 10, for separating the light emitted from the light source into light beams with different viewing angles, and the display 30 receives the light beams with different viewing angles from the diffractive optical element 20 and displays the image contents with different viewing angles through the light beams. Specifically, the diffractive optical element 20 is positioned against a first side of the display 30, and the polymer dispersed liquid crystal film 40 is attached to the display 30 on a second side of the display 30 opposite the first side.
In some embodiments, the diffractive optical element 20 is disposed on a side of the display 30 opposite to the light source 10, and is used for separating image content displayed by the light source after the display 30 is loaded into image content with different viewing angles, and projecting the image content to the polymer dispersed liquid crystal film 40. Specifically, the diffractive optical element 20 is disposed close to the side of the display screen 30 facing away from the light source, and the side of the diffractive optical element 20 away from the display screen 30 is attached to the polymer dispersed liquid crystal film 40.
Further, in some embodiments, the voltage control system 50 may control the power-on voltage applied to the polymer dispersed liquid crystal film 40 to change the state of the polymer dispersed liquid crystal film 40 so as to display the 2D or 3D display effect of the image content with different viewing angles after passing through the display screen 30.
In one embodiment, the voltage control system 50 may be configured to adjust the energizing voltage to match the refractive indices of the liquid crystal droplets and the matrix of the organic solid polymer matrix, and even if the polymer dispersed liquid crystal film 40 is in the transmissive state, the polymer dispersed liquid crystal film 40 may be in the transparent state to enable the 3D display effect after the image contents with different viewing angles are transmitted through the polymer dispersed liquid crystal film 40.
In another embodiment, the voltage control system 50 may be configured to stop applying power to the polymer dispersed liquid crystal film 40, and the polymer dispersed liquid crystal film 40 has a scattering effect to directly scatter image contents with different viewing angles, so as to display the image contents in a 2D display effect.
In particular, in some embodiments, the diffractive optical element 20 may be a pixelated grating, which is composed of a plurality of pixel cells, each pixel cell of the pixelated grating corresponding to a pixel cell of the display screen 30. Each pixel unit of the pixilated grating is composed of a plurality of microstructures, the microstructures of each pixel unit are consistent in shape, and the microstructures of different pixel units can be identical in shape or different in shape. The microstructures are selected from rectangles, triangles, multi-step types, and the like.
In an exemplary embodiment, the image content includes shape content and color content. The light source 10 is an array light source that can be used to emit light with shape content. The display screen 30 may have the light have color content in the image content. The light emitted by the display screen 30 may then display shape content as well as color content.
In some embodiments, further, the display screen 30 may be an LCD, LED, OLED, or Mirco-LED, among others.
Illustratively, the display screen 30 may be provided separately from the light source 10 or may be provided integrally therewith. Illustratively, when the display screen 30 is an LCD, white LED, it may be provided separately from the light source 10. The display screen 30 may include pixel units for displaying image contents, and color filters, polarizers, and the like.
When the display screen 30 is an RGB LED, although the pixelated light source 10 may be controlled to emit light, typically the RGB LED comprises a polarizer, and thus it may be considered that image content is displayed at the polarizer, i.e. still the display screen 30. Further, the display 30 and the light source 10 may be integrally designed as a light-emitting display which emits light carrying image content to the diffractive optical element 20. In one embodiment, the polymer dispersed liquid crystal film 40 may be disposed on the side closest to the viewer.
Some non-limiting embodiments of a 2D/3D switchable display system provided in accordance with the present application will be described in detail with reference to fig. 3 to 9.
According to another embodiment of the present application, as shown in fig. 3, fig. 3 is a 2D/3D switchable in-vehicle display system applicable to an in-vehicle instrument panel. The system may essentially comprise: a light source 10, a display screen 30, a diffractive optical element 20, a polymer dispersed liquid crystal film 40 and a voltage control system 50.
Specifically, as shown in fig. 3, the light source 10 may be disposed at the foremost side of the system, and may emit light, and the light may be loaded with display contents of different viewing angles after passing through the display screen 30; after the display content reaches the diffractive optical element 20 close to the display screen 30, the display content with different visual angles is separated by utilizing the diffraction action of the diffractive optical element 20 and reaches the polymer dispersed liquid crystal film 40, the voltage control system 50 adjusts the state of the polymer dispersed liquid crystal film 40 by controlling the voltage applied to the polymer dispersed liquid crystal film 40, when the refractive indexes of liquid crystal droplets of the polymer dispersed liquid crystal film 40 and the organic solid polymer matrix are matched, the content with different visual angles modulated by the diffractive optical element 20 penetrates through the polymer dispersed liquid crystal film 40, the content with different visual angles is seen by the left eye and the right eye of a driver, and a 3D display effect is generated after brain fusion, as shown in FIG. 4; when the voltage control system 50 controls to stop the power supply to the polymer dispersed liquid crystal film 40, that is, when the voltage applied to the polymer dispersed liquid crystal film 40 is 0, the polymer dispersed liquid crystal film 40 has a scattering effect, and directly scatters the contents of different viewing angles, and the driver can see the same contents with both eyes, thereby forming a 2D display effect, as shown in fig. 5. Therefore, by adjusting the voltage applied to the polymer dispersed liquid crystal film 40, real-time switching between 2D and 3D display can be achieved.
Further, in the above-described embodiment, the diffractive optical element 20 may be a pixelated grating composed of a plurality of pixel units 201, each pixel unit 201 of the pixelated grating corresponding to a pixel unit 301 of the display screen 30. Each pixel unit 201 of the pixilated grating is composed of a plurality of microstructures, the microstructures of each pixel unit 201 are consistent in shape, the microstructures of different pixel units 201 can be the same in shape or different in shape, and the microstructures are selected from rectangles, triangles, multi-step types and the like; the display screen 30 may be an LCD, LED, OLED, or Mirco-LED, etc.; the polymer dispersed liquid crystal film 40 may be disposed on the side closest to the viewer.
According to another embodiment of the present application, as shown in fig. 6, fig. 6 is another 2D/3D switchable on-board display system applicable to an on-board instrument panel, which may mainly include: a light source 10, a diffractive optical element 20, a display screen 30, a polymer dispersed liquid crystal film 40 and a voltage control system 50.
Specifically, as shown in fig. 6, in this embodiment, the light source 10 may be disposed at the foremost side of the system and may emit light, the diffractive optical element 20 is disposed adjacent to the display 30 at a first side of the display 30 close to the light source 10, the polymer dispersed liquid crystal film 40 is attached to the display 30 at a second side of the display 30 opposite to the first side, the light emitted from the light source 10 reaches the diffractive optical element 20 to be separated into different viewing angles, and then reaches the display 30 to display image contents of different viewing angles, and then the voltage of the polymer dispersed liquid crystal film 40 is adjusted to adjust the state of the polymer dispersed liquid crystal film 40, when the refractive indexes of the liquid crystal droplets of the polymer dispersed liquid crystal film 40 and the organic solid polymer matrix are matched, the contents of different viewing angles modulated by the diffractive optical element 20 pass through the polymer dispersed liquid crystal film 40, and the left and right eyes of a driver see different viewing angle contents, 3D display effect is generated after brain fusion, as shown in figure 4; when the voltage control system 50 controls to stop the power supply to the polymer dispersed liquid crystal film 40, that is, when the voltage applied to the polymer dispersed liquid crystal film 40 is 0, the polymer dispersed liquid crystal film 40 has a scattering effect, and directly scatters the contents of different viewing angles, and the driver can see the same contents with both eyes, thereby forming a 2D display effect, as shown in fig. 5. Therefore, by adjusting the voltage applied to the polymer dispersed liquid crystal film 40, real-time switching between 2D and 3D display can be achieved.
Further, it is to be understood that in the embodiment shown in fig. 6, the diffractive optical element 20 is arranged next to the display screen 30 on a side of the display screen 30 close to the light source 10. Compared with the embodiment shown in fig. 3, the two embodiments have good working state and image quality under normal environment.
However, in the embodiment shown in fig. 6, when strong light is emitted from the outside, the strong light is emitted to the surface of the display screen 30 and does not emit to the diffractive optical element 20, so that a glare effect (rainbow fringes generated by diffraction of the grating) generated by the diffractive optical element 20 is avoided, the definition of the image is not disturbed, and a viewer can watch the image normally. And different external use environments may be adapted to different embodiments.
Further, in the above-described embodiment, the diffractive optical element 20 may be a pixelated grating composed of a plurality of pixel units each corresponding to a pixel unit of the display screen 30, each pixel unit composed of a plurality of microstructures, the microstructures of each pixel unit having the same shape, the microstructures of different pixel units having the same or different shapes, the microstructures being selected from a rectangle, a triangle, a multi-step type, and the like; the display screen 30 may be an LCD, LED, OLED, or Mirco-LED, etc.; the polymer dispersed liquid crystal film 40 may be disposed on the side closest to the viewer.
In another embodiment, as shown in fig. 7, fig. 7 is a 2D/3D switchable home theater display system according to another embodiment of the present application, which may mainly include: a light source 10, a display screen 30, a diffractive optical element 20, a polymer dispersed liquid crystal film 40 and a voltage control system 50.
Specifically, as shown in fig. 7, in the system, the light source 10 disposed at the frontmost side may emit light, the light emitted from the light source 10 reaches the diffractive optical element 20 abutting on the display screen 30 and is separated into lights with different viewing angles, the lights with different viewing angles pass through the display screen 30 and are loaded with display contents with different viewing angles, the voltage control system 50 controls the voltage applied to the polymer dispersed liquid crystal film 40, so as to adjust the state of the polymer dispersed liquid crystal film 40, when the refractive indexes of the liquid crystal droplets of the polymer dispersed liquid crystal film 40 and the organic solid polymer matrix are matched, the polymer dispersed liquid crystal film 40 is in a transparent state, i.e., a transmission state, the contents with different viewing angles penetrate through the polymer dispersed liquid crystal film 40, the left and right eyes of the viewer see different viewing angle contents, and the viewer generates a 3D display effect after brain fusion, as shown in fig. 8, and the viewers at different positions can see different 3D display contents and also see the same 3D display contents; when the voltage control system 50 stops applying power to the polymer dispersed liquid crystal film 40, that is, when the voltage applied to the polymer dispersed liquid crystal film 40 is 0, the polymer dispersed liquid crystal film 40 has a scattering effect, and image contents with different viewing angles are directly scattered, and at this time, both eyes of viewers at different positions see the same contents, so as to form a 2D display, as shown in fig. 9. Therefore, real-time switching between 2D and 3D display can be achieved by adjusting the voltage applied to the polymer dispersed liquid crystal film 40 by the voltage control system 50.
In addition, it can be understood that, in the 2D/3D switchable display system shown in fig. 7, the diffractive optical element 20 may also be disposed close to the display screen 30 on a side of the display screen 30 away from the light source 10, that is, light emitted from the light source 10 is firstly projected onto the display screen 30, image content displayed on the display screen 30 is loaded, and then the light reaches the diffractive optical element 20 to separate the image into different viewing angles, and then the image content of different viewing angles is displayed in 2D or 3D through the polymer dispersed liquid crystal film 40. The process of adjusting the energizing voltage applied to the polymer dispersed liquid crystal film 40 by the voltage control system 50 is the same as that described in the previous embodiment, and the description thereof will not be repeated.
Further, in the embodiment shown in fig. 7, the diffractive optical element 20 may be a pixelated grating, the pixelated grating is composed of a plurality of pixel units, each pixel unit corresponds to a pixel unit of the display screen 30, each pixel unit is composed of a plurality of microstructures, the microstructures of each pixel unit have the same shape, the microstructures of different pixel units may have the same shape or different shapes, and the microstructures are selected from a rectangle, a triangle, a multi-step type, etc.; the display screen 30 may be an LCD, LED, OLED, or Mirco-LED, etc.; the polymer dispersed liquid crystal film 40 may be disposed on the side closest to the viewer.
Another aspect of the present application also provides a method of manufacturing a 2D/3D switchable display system, and as shown in fig. 10, the method 1000 of manufacturing a 2D/3D switchable display system may mainly include the following three steps:
s1, setting a light source for emitting light;
s2, arranging a display screen for displaying image content on the light path of the light; and
s3, arranging a polymer dispersed liquid crystal film with scattering state and transmission state on the side of the display screen opposite to the light source, so as to display the image contents with different viewing angles in the light passing through the display screen in 2D or 3D display effect.
In one embodiment, a method of manufacturing a 2D/3D switchable display system provided by the present application may further include: the display screen receives the light rays with different visual angles from the diffractive optical element so that the light rays with different visual angles display image contents with different visual angles.
In another embodiment, a method of manufacturing a 2D/3D switchable display system provided by the present application may further include: and a diffractive optical element is arranged on one side of the display screen, which is opposite to the light source, and is used for separating the image content displayed on the display screen into image content with different visual angles and projecting the image content to the polymer dispersed liquid crystal film.
Further, in one embodiment, a method of manufacturing a 2D/3D switchable display system provided by the present application may further include: and the voltage control system is used for controlling the electrified voltage applied to the polymer dispersed liquid crystal film so as to change the state of the polymer dispersed liquid crystal film, thereby displaying the 2D or 3D display effect on the image contents of different visual angles of the display screen.
Specifically, in one embodiment, the voltage control system is configured to adjust the power-on voltage to make the polymer dispersed liquid crystal film in a transmissive state, so that the image contents of different viewing angles show a 3D display effect after passing through the polymer dispersed liquid crystal film.
Specifically, in another embodiment, when the voltage control system stops supplying power to the polymer dispersed liquid crystal film, the polymer dispersed liquid crystal film is in a scattering state and directly scatters image contents of different viewing angles, so that the image contents can be displayed in a 2D display effect.
In one embodiment, the polymer dispersed liquid crystal film is disposed on a side closest to a viewer.
In one embodiment, the diffractive optical element is positioned against a first side of the display screen and the polymer-dispersed liquid crystal film is attached to the display screen on a second side of the display screen opposite the first side.
In one embodiment, the diffractive optical element is positioned immediately adjacent to a side of the display screen facing away from the light source, and a side of the diffractive optical element remote from the display screen is attached to the polymer dispersed liquid crystal film.
By combining the embodiments, the 2D/3D switchable display system and the manufacturing method thereof provided by the application can rapidly realize real-time switching of 2D/3D display by changing the magnitude of the voltage applied to the polymer dispersed liquid crystal film; and the polymer dispersed liquid crystal film has low cost, and compared with the two display screens, the scheme provided by the application has low cost.
Finally, the above description is only an illustration of embodiments of the present application and the technical principles applied. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the technical idea. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A 2D/3D switchable display system comprising a light source for emitting light and a display screen for displaying image content, characterized in that the system further comprises:
the polymer dispersed liquid crystal film is arranged on one side of the display screen, which is opposite to the light source, and has a scattering state and a transmission state, so that the image contents of different visual angles in the light rays penetrating through the display screen can show a 2D or 3D display effect.
2. The system of claim 1, further comprising:
the display screen receives the light rays with different visual angles from the diffractive optical element so as to display image contents with different visual angles according to the light rays.
3. The system of claim 1, further comprising:
and the diffractive optical element is arranged on one side of the display screen, which is opposite to the light source, and is used for separating the image content displayed on the display screen into image content with different visual angles and projecting the image content to the polymer dispersed liquid crystal film.
4. The system of any one of claims 1-3, wherein the polymer dispersed liquid crystal film comprises:
an organic solid polymer matrix; and
a plurality of liquid crystal droplets dispersed within the organic solid polymer matrix;
wherein the optical axes of at least a portion of the liquid crystal droplets are not parallel to each other in the absence of an applied electric field.
5. A system according to claim 2 or 3, characterized in that the system further comprises:
and the voltage control system is used for controlling the electrifying voltage applied to the polymer dispersed liquid crystal film so as to change the state of the polymer dispersed liquid crystal film, so that the image contents of different visual angles in the light rays passing through the display screen show a 2D or 3D display effect.
6. The system according to any of claims 1-3, wherein the display screen is an LCD, LED, OLED, or Mirco-LED.
7. A method of manufacturing a 2D/3D switchable display system, the method comprising:
a light source arranged to emit light;
a display screen for displaying image content is arranged on the light path of the light; and
and arranging a polymer dispersed liquid crystal film with a scattering state and a transmission state on one side of the display screen opposite to the light source so as to enable image contents of different visual angles in light rays penetrating through the display screen to show a 2D or 3D display effect.
8. The method of claim 7, further comprising:
and arranging a diffractive optical element on a light path of light emitted by the light source, wherein the diffractive optical element is used for separating the light emitted by the light source into light rays with different viewing angles, and the display screen receives the light rays with different viewing angles from the diffractive optical element so as to display image contents with different viewing angles according to the light rays.
9. The method of claim 7, further comprising:
and arranging a diffractive optical element on one side of the display screen, which is opposite to the light source, for separating the image content displayed on the display screen into image contents with different visual angles and projecting the image contents to the polymer dispersed liquid crystal film.
10. The method according to claim 8 or 9, characterized in that the method further comprises:
and the voltage control system is used for controlling the electrified voltage applied to the polymer dispersed liquid crystal film so as to change the state of the polymer dispersed liquid crystal film, thereby displaying the 2D or 3D display effect of the image contents of different visual angles in the light rays penetrating through the display screen.
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