CN115185086A - Display device - Google Patents
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- CN115185086A CN115185086A CN202210849468.2A CN202210849468A CN115185086A CN 115185086 A CN115185086 A CN 115185086A CN 202210849468 A CN202210849468 A CN 202210849468A CN 115185086 A CN115185086 A CN 115185086A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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Abstract
The application discloses display device relates to and shows technical field, can improve the stray light that sets up fresnel lens and produce, improves and shows imaging quality. A display device, comprising: a light source; at least one Fresnel lens, wherein one side of the Fresnel lens, which is provided with an annular convex part, is arranged towards the light source, the annular convex part of the Fresnel lens is provided with a first phase retardation film, the first phase retardation film is used for converting first polarized light into second polarized light, and the first polarized light is obtained based on light of the light source; the first polaroid is arranged on one side, far away from the light source, of the Fresnel lens and used for transmitting the first polarized light and filtering the second polarized light.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
In recent years, the market of VR (Virtual Reality) heads is increasing in temperature, and in the related technical field of global layout VR complete machines, because the market demand of consumer grade VR heads is to improve the image quality as much as possible while being light and thin, fresnel lenses are still one of the mainstream schemes of VR head near-eye optical systems at present by virtue of the light and thin characteristics and the larger field angle of the fresnel lenses; the principle of the Fresnel lens is that only a curved surface which is refracted is reserved through a surface reducing means, the same light-gathering effect can be achieved while the thickness of the lens is reduced, and the surface reducing processing enables the Fresnel lens to look like a lens with countless concentric circular grains (namely a Fresnel zone).
However, in the existing display device, stray light is generated due to the arrangement of the fresnel lens, and then the imaging quality of the display device is affected.
Disclosure of Invention
The embodiment of the application provides a display device, can improve the stray light that sets up fresnel lens and produce, improves and shows imaging quality.
In a first aspect of embodiments of the present application, there is provided a display device, including:
a light source;
at least one Fresnel lens, wherein one side of the Fresnel lens, which is provided with an annular convex part, is arranged towards the light source, the annular convex part of the Fresnel lens is provided with a first phase retardation film, the first phase retardation film is used for converting first polarized light into second polarized light, and the first polarized light is obtained based on light of the light source;
the first polaroid is arranged on one side, far away from the light source, of the Fresnel lens and used for transmitting the first polarized light and filtering the second polarized light.
In some embodiments, the display device further comprises:
a second phase retardation film disposed between the first polarizer and the fresnel lens, the second phase retardation film converting the second polarized light into third polarized light, and an optical axis direction of the second phase retardation film being the same as an optical axis direction of the first phase retardation film;
the first polarizer is used for filtering the third polarized light.
In some embodiments, the first polarized light is linearly polarized light and the second polarized light is non-linearly polarized light.
In some embodiments, the display device further comprises:
a third phase retardation film having an optical axis direction perpendicular to the optical axis direction of the first phase retardation film;
the Fresnel lens further comprises a middle convex part, and the annular convex part surrounds the middle convex part; or the like, or, alternatively,
the Fresnel lens further comprises an intermediate concave portion and an annular concave portion, the annular concave portion surrounds the intermediate concave portion, the annular convex portion is formed between the adjacent annular concave portions, or the annular convex portion is formed between the annular concave portion and the intermediate concave portion;
the third phase retardation film is provided on a side surface of the annular convex portion and a surface of the intermediate convex portion or the intermediate concave portion.
In some embodiments, the first phase retardation film, the second phase retardation film, and the third phase retardation film are each phase retardation films of a non-integral multiple of a wavelength.
In some embodiments, the first phase retardation film is a 1/4 wavelength phase retardation film; and/or the presence of a gas in the atmosphere,
the second phase delay film is a phase delay film with the wavelength of 1/4; and/or the presence of a gas in the gas,
the third phase delay film is a phase delay film with 1/4 wavelength. .
In some embodiments, the first phase retardation film is disposed on an end surface of the annular convex portion near one end of the light source.
In some embodiments, the first phase retardation film is disposed on the annular protrusion by plating, coating or spraying.
In some embodiments, a second polarizer is disposed on a side of the light source close to the fresnel lens, and the second polarizer is used for transmitting the first polarized light in the light rays of the light source.
In some embodiments, the first polarizer comprises an absorbing polarizer and/or a linear polarizer.
In some embodiments, the display device further comprises:
and the lens component is arranged between the first polaroid and the Fresnel lens and/or between the Fresnel lens and the light source.
In some embodiments, the display device is a VR display device.
In some embodiments, the light source comprises a display panel.
According to the display device provided by the embodiment of the application, the annular convex part of the Fresnel lens is provided with the first phase delay film, the first phase delay film can convert the first polarized light into the second polarized light, the first polarized light L1 is obtained based on the light of the light source, and the polarization states of the first polarized light and the second polarized light are different. The first polaroid is arranged on one side, far away from the light source, of the Fresnel lens, the first polaroid can transmit first polarized light and filter second polarized light, light rays which are taken from one side, close to the light source, of the annular convex portion can be filtered, and the first polarized light L1 emitted from other positions of the Fresnel lens can be transmitted. The first phase retardation film and the first polarizer are arranged in a matched manner, so that stray light caused by a forming process of the Fresnel lens can be filtered or eliminated, the display effect of the display device is improved, and the display quality is improved.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another display device provided in an embodiment of the present application;
fig. 3 is a schematic structure of another display device provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of another display device provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another display device provided in an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations on the technical solutions of the embodiments of the present specification, and the technical features in the embodiments and examples of the present specification may be combined with each other without conflict.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. The term "two or more" includes the case of two or more.
In recent years, the market of VR heads is increasing in temperature, and in the related technical field of global layout VR complete machines, because the market demand of consumer-grade VR heads is to improve the image quality as much as possible while being light and thin, the fresnel lens still is one of the mainstream schemes of VR head near-eye optical systems at present by virtue of the light and thin characteristic and the larger field angle of the fresnel lens; the principle of the Fresnel lens is that only a curved surface which is refracted is reserved through a surface reducing means, the same light condensation effect can be achieved while the thickness of the lens is reduced, and the surface reducing processing enables the Fresnel lens to look like a lens with countless concentric circular grains. However, in the conventional display device, stray light is generated due to the arrangement of the fresnel lens, which in turn affects the imaging quality of the display device.
In a first aspect of an embodiment of the present application, a display device is provided, and fig. 1 is a schematic structural diagram of the display device provided in the embodiment of the present application, and as shown in fig. 1, the display device provided in the embodiment of the present application includes: the Fresnel lens 200 is provided with a plurality of annular convex parts 210 and middle convex parts 220, the annular convex parts 210 surround the middle convex parts 220, the Fresnel lens is also called a screw lens, most of the Fresnel lens is a sheet formed by polyolefin material injection molding, and the Fresnel lens is also made of glass, one surface of the lens is a smooth surface, and the other surface of the lens is inscribed with concentric circles from small to large, namely the annular convex parts 210 and the middle convex parts 220 are concentric circles, and the annular convex parts 210 are designed according to the interference, relative sensitivity and receiving angle requirements of light. The side of the fresnel lens 200 having the annular convex portion 210 is disposed toward the light source 100, and the light source 100 may be disposed according to a display type of the display device, and the embodiment of the present application is not particularly limited. The annular convex portion 210 of the fresnel lens 200 is provided with a first phase retardation film 300, the first phase retardation film 300 is used for converting the first polarized light L1 into the second polarized light L2, the first polarized light L1 is obtained based on the light of the light source 100, and the polarization states of the light of the first polarized light L1 and the second polarized light L2 are different. The first polarizer 400 is disposed on a side of the fresnel lens 200 away from the light source 100, and the first polarizer 400 is used for transmitting the first polarized light L1 and filtering the second polarized light L2.
It should be noted that, in an ideal form, the curved surface of the middle convex portion 220 is an effective surface, the straight rising position of the draft angle is an ineffective surface, and the included angle between the curved surface and the straight rising position of the draft angle is a sharp angle, that is, in an ideal state, the end of the annular convex portion 210 close to the light source 100 is a sharp angle, and the sharp angle is an ineffective surface, but there is a certain error in the actual injection molding tool processing, and the overall quality of the lens molding process needs to be considered, so that the sharp angle on the fresnel zone cannot be actually made sharp, the fresnel zone sharp angle is actually a round angle, that is, the end of the annular convex portion 210 close to the light source 100 is actually a curved surface. When the end of the annular protrusion 210 close to the light source 100 is a sharp corner, the light cannot penetrate through the sharp corner, but when the end of the annular protrusion 210 close to the light source 100 is a curved surface, the light from the light source passes through the fresnel lens 200 via the curved surface, and then stray light is generated, which affects the imaging quality of the lens.
In view of the above problem, the embodiment of the present application provides the first phase retardation film 300 on the annular convex portion 210 of the fresnel lens, and the phase retardation film can change the polarization state of the light ray, and the first polarized light L1 is usually the light ray with the polarization state that can be comfortably received by human eyes, such as p-light. The first polarized light L1 can be converted into second polarized light L2 after passing through the first behavior retardation film 300 and then exit the fresnel lens 200. The first polarizer 400 may transmit the first polarized light L1, but the first polarizer 400 may filter the second polarized light L2, and the filtering form of the first polarizer 400 for the second polarized light L2 may be absorption, reflection, or other blocking forms, and the application is not limited in particular. The first phase retardation film 300 and the first polarizer 400 are disposed in a matching manner, so that stray light caused by a forming process of a fresnel lens can be filtered or eliminated, and thus, a display effect of the display device is improved, and display quality is improved.
In the display device provided in the embodiment of the application, the first phase retardation film 300 is disposed on the annular protrusion 210 of the fresnel lens 200, so that the first phase retardation film 300 can convert the first polarized light L1 into the second polarized light L2, the first polarized light L1 is obtained based on the light of the light source 100, and the polarization states of the first polarized light L1 and the second polarized light L2 are different. The first polarizer 400 is disposed on a side of the fresnel lens 200 away from the light source 100, and the first polarizer 400 can transmit the first polarized light L1 and filter the second polarized light L2, so that the light incident from the side of the annular protrusion 210 close to the light source 100 can be filtered out, and the first polarized light L1 emitted from other positions of the fresnel lens 200 can be transmitted. The first retardation film 300 and the first polarizer 400 are disposed in a matching manner, so that stray light caused by a fresnel lens forming process can be filtered or eliminated, and the display effect of the display device can be improved.
In some embodiments, the light source 100 may include a display panel, and the light source may further include a dot matrix light source, and the dot matrix light source may constitute a display screen, which is not particularly limited in the examples of the present application.
For example, in the case where the light source 100 employs a display panel, the display device may be a VR device, such as a VR headset, and the side where the first polarizer 400 is located may be used to provide an eyepiece. Besides the head-mounted device, the display device provided by the embodiment of the application can be used for forming other VR display devices and can also be a naked eye VR device, and the embodiment of the application is not particularly limited.
In some embodiments, the display panel may include a liquid crystal display panel, an organic light emitting display panel, a laser display panel, or an LED display panel, and the type of the display panel may be selected according to an application scenario of a specific display device, which is not particularly limited in the examples of the present application.
In some embodiments, the first phase retardation film 300 is disposed on an end surface of the annular protrusion 210 near one end of the light source 100. Because there is a certain error in the injection mold processing of the fresnel lens 200, and the overall quality of the lens molding process needs to be considered, it is practically impossible to sharpen the sharp corner on the fresnel zone, and the sharp corner of the fresnel zone is actually a rounded corner, i.e. the end of the annular protrusion 210 close to the light source 100 is actually a curved surface. When the end of the annular protrusion 210 close to the light source 100 is a sharp corner, the light cannot penetrate through the sharp corner, but when the end of the annular protrusion 210 close to the light source 100 is a curved surface, the light from the light source passes through the fresnel lens 200 via the curved surface, and then stray light is generated, which affects the imaging quality of the lens. Therefore, the first retardation film 300 capable of converting the polarization state of light can be disposed on the end surface of the annular protrusion 210, the first polarized light L1 absorbed from the end surface of the annular protrusion 210 can be better converted into the second polarized light L2, and the second polarized light L2 is further filtered by the first polarizer 400, so that stray light caused by processes can be reduced or eliminated.
In some embodiments, the first phase retardation film 300 may be disposed on the annular protrusion 210 by plating, coating or spraying, and the disposition may be selected according to specific material characteristics, and the examples of the present application are not particularly limited. The volume of the Fresnel lens and the total length of the whole optical system are hardly influenced by the coating, coating or spraying process and the added device, so that the near-eye display scheme of the Fresnel lens still has the advantages of lightness and thinness, the imaging quality of the Fresnel lens is improved, and the Fresnel lens has important practicability and commercial value.
In some embodiments, the number of the fresnel lenses 200 may be at least two or more, and two or more fresnel lenses 200 may form a group of lens groups, which may be configured according to the requirements of different display devices, and the embodiments of the present disclosure are not particularly limited.
It should be noted that two or more fresnel lenses 200 may be disposed in a fitting manner, or may be disposed in a gap manner; the first polarizer 400 and the fresnel lens 200 shown in fig. 1 may be attached, may be attached by using a transparent adhesive, or may be disposed in a gap; the fresnel lens 200 and the light source 100 may be disposed in a fitting manner, or may be disposed in a gap, which is not specifically limited in the embodiments of the present application.
In some embodiments, fig. 2 is a schematic structural diagram of another display device provided in an example of the present application. As shown in fig. 2, the display device provided in the embodiment of the present application may further include a second phase retardation film 500, where the second phase retardation film 500 is disposed between the first polarizer 400 and the fresnel lens 200, and the second phase retardation film 500 is used to convert the second polarized light L2 into third polarized light L3; the first polarizer 400 may be used to filter the third polarized light L3. The optical axis direction of the first phase retardation film 300 is the same as the optical axis direction of the second phase retardation film 500. For example, the first polarized light L1 is converted into right-handed circular polarized light or elliptical polarized light after passing through the first phase retardation film 300, the right-handed circular polarized light or elliptical polarized light is converted into third polarized light L3 by passing through the second phase retardation film 500, the first polarized light L1 is converted into right-handed circular polarized light or elliptical polarized light by passing through the second phase retardation film 500, the third polarized light L3 may be absorbed by the first polarizer 400, and light having the polarization direction of the third polarized light L3 in the right-handed elliptical polarized light or circular polarized light converted by passing through the first polarized light L1 may be transmitted by the first polarizer 400, and a portion of the first polarized light L1 may be transmitted by the first polarizer 400, but the brightness of the first polarized light L1 transmitted by the first polarizer 400 is reduced.
It should be noted that the second phase retardation film 500 shown in fig. 2 may be attached to a side of the fresnel lens 200 away from the light source 100, and the attachment may be electrostatic attachment or adhesive attachment; the second phase retardation film 500 may be disposed in a gap with the fresnel lens 200, and the gap may be set according to the type of the display device, the reliability requirement, and the design of the optical path, which is not particularly limited in the embodiments of the present application.
In some embodiments, the first phase retardation film 300 and the second phase retardation film 500 are both phase retardation films of non-integral multiple wavelengths. The non-integral multiple phase retardation film can realize the conversion of the polarization state of light, convert the light rays transmitted from the annular protrusion 210 into the polarization state capable of being filtered by the first polarizer 400, reduce or eliminate the stray light effect generated by the fresnel lens due to the process, and improve the display effect.
In some embodiments, the first phase retardation film 300 may be a 1/4 wavelength phase retardation film. The second phase retardation film 500 may be a 1/4 wavelength phase retardation film. The 1/4 wavelength phase retardation film can convert linearly polarized light into circularly polarized light, and the 1/4 wavelength phase retardation film can also convert circularly polarized light into linearly polarized light.
The non-integral multiple wavelength retardation film provided in the embodiments of the present application may also be a 1/2 wavelength retardation film, a 3/4 wavelength retardation film, or other wavelength retardation films, but the embodiments of the present application are not limited to this, and the 1/2 wavelength retardation film and the 3/4 wavelength retardation film may be converted to obtain elliptically polarized light.
In some embodiments, the first polarizer 400 may include one or both of an absorption-type polarizer and a linear polarizer. The linear polarizer can pass through the first polarized light L1, and light in other polarization states or other polarization directions can be blocked, so that the linear polarizer can play a role in filtering light. The absorption type polaroid can absorb light rays in other polarization states except the first polarized light L1, so that the effect of filtering the light rays can be achieved, the stray light effect generated by the Fresnel lens due to the process can be reduced or eliminated, and the display effect is improved.
For example, fig. 3 is a schematic structural diagram of another display device provided in an embodiment of the present application. As shown in fig. 3, the first polarized light L1 is linearly polarized light, the second polarized light L2 is non-linearly polarized light, and the third polarized light L3 may be linearly polarized light. For example, the first polarized light L1 is p light, the second polarized light L2 is circularly polarized light or elliptically polarized light, and the third polarized light L3 may be s light perpendicular to the polarization direction of the p light. In the case where the first phase retardation film 300 and the second phase retardation film 500 are both phase retardation films having a wavelength of 1/4, and the first polarizer 400 is an absorption-type polarizer, the p-ray can be transmitted through the first phase retardation film 300 to obtain a right-handed circularly polarized light, the right-handed circularly polarized light is converted into s-ray through the second phase retardation film 500, and the absorption-type first polarizer 400 can absorb all of the s-ray. If the p light passes through the fresnel lens 200 or the p light passes through the second phase retardation film 500 to obtain right-handed circularly polarized light, the circularly polarized light is a combination of the p light and the s light, that is, the circularly polarized light has a polarization direction of the p light and a polarization direction of the s light, the absorption-type first polarizer 400 can absorb the light of the polarization direction of the s light in the circularly polarized light, and the light of the polarization direction of the p light is retained, and the light emitted from the first polarizer 400 is the p light, and the reduction of the brightness of the light can be improved by increasing the brightness of the light source 100. The second phase retardation film 500 is disposed to further convert the light passing through the end of the annular protrusion 210, and the second conversion further ensures that the light passing through the end of the annular protrusion 210 is filtered by the first polarizer 400 more completely.
In some embodiments, fig. 4 is a schematic structural diagram of another display device provided in an example of the present application. As shown in fig. 4, the display device provided in the embodiment of the present application further includes: a third phase retardation film 600, the optical axis direction of the third phase retardation film 600 being perpendicular to the optical axis direction of the first phase retardation film 300; the fresnel lens 200 further includes a middle convex portion 220, and the annular convex portion 210 surrounds the middle convex portion 220; the third phase retardation film 600 is disposed on the side surface of the annular protrusion 210 and the surface of the middle protrusion 220.
As shown in fig. 4, the surface of the middle protrusion 220 is a curved surface, and the side surfaces of the annular protrusion 210 have two, one being an inclined side surface 211 and the other being a vertical side surface 212 perpendicular to the bottom of the fresnel lens, p-light is not generally incident from the vertical side surface 212, and thus, the third phase retardation film 600 may be provided only on the curved surface of the middle protrusion 220 and the inclined side surface 211 of the annular protrusion 210. In some embodiments, the third phase retardation film 600 may also be disposed on the vertical side surface 212 of the annular protrusion 210, and the embodiment of the present application is not particularly limited. For example, the first phase retardation film 300, the second phase retardation film 500 and the third phase retardation film 600 may each be a 1/4 wavelength phase retardation film, the optical axis directions of the first phase retardation film 300 and the second phase retardation film 500 are the same, and the optical axis direction of the first phase retardation film 300 is perpendicular to the optical axis direction of the third phase retardation film 600. The p light passes through the first phase retardation film 300 on the fresnel lens 200 to obtain right-handed circularly polarized light, the right-handed circularly polarized light passes through the second phase retardation film 500 to obtain s light, and the s light can be filtered by the first polarizer 400. Since the optical axis direction of the third phase retardation film 600 is perpendicular to the optical axis direction of the first phase retardation film 300, the p-ray can be left-handed circularly polarized light through the third phase retardation film 600, and the p-ray can be obtained through the second phase retardation film 500 and can be transmitted out of the first polarizer 400.
It should be noted that, the end surface of the annular protrusion 210 of the fresnel lens 200 close to the light source 100 may be covered by a mask jig, the third phase retardation film 600 is plated on the surface of the middle protrusion 220 and the side surface of the annular protrusion 210 by a plating method, and then the first phase retardation film 300 is coated on the end surface of the annular protrusion 210 close to the light source by a coating method.
In the display device provided in the embodiment of the present application, by disposing the first phase retardation film 300, the second phase retardation film 500, and the third phase retardation film 600 in cooperation, and disposing the third phase retardation film 600 in the direction of the optical axis perpendicular to the direction of the optical axis of the first phase retardation film 300, the directions of the optical axes of the first phase retardation film 300 and the second phase retardation film are the same, and the third phase retardation film 600 is disposed on the side surface of the annular protrusion 210 and the surface of the middle protrusion 220, stray light generated by the transmission of light through the end surface of the annular protrusion 210 of the fresnel lens 200 can be attenuated or eliminated, and the display effect can be improved.
In some embodiments, fig. 5 is a schematic structural diagram of a display device provided in an example of the present application. As shown in fig. 5, a second polarizer 110 is disposed on a side of the light source 100 close to the fresnel lens 200, and the second polarizer 110 is used for transmitting the first polarized light L1 of the light source. The light emitted from the light source is originally natural light, the natural light has light with various polarization directions, and the first polarized light L1 needs to be obtained through the second polarizer 110, and in the case where the first polarized light L1 is linearly polarized light, the second polarizer 110 is a linearly polarized light. For example, in the case that the light source 100 is a liquid crystal display panel, a corresponding third polarizer needs to be disposed on the side of the light source 100 away from the fresnel lens 200. The second polarizer 110 may be a part of a liquid crystal display panel, the second polarizer 110 may be a part of an organic light emitting display panel, and the second polarizer 110 may be disposed on the display side of the LED display panel to obtain linearly polarized light.
It should be noted that the fresnel lens may be a fresnel convex lens or a fresnel concave lens.
In some embodiments, fig. 6 is a schematic structural diagram of another display device provided in an example of the present application. As shown in fig. 6, the fresnel lens 200 may include intermediate concave portions 230 and annular concave portions 240, the annular convex portions 210 may be formed between adjacent annular concave portions 240, the annular convex portions 210 surround the intermediate concave portions 230, the annular concave portions 240 surround the intermediate concave portions 230, and the intermediate concave portions 230 may transmit the first polarized light L1. The surface of the middle concave portion 230 may also be provided with a third phase retardation film, and the convex fresnel lenses provided in the above-described embodiments are all characterized as concave fresnel lenses, and the embodiments of the present application are not particularly limited.
In some embodiments, the display device provided in the present embodiment may further include a lens assembly, which may be disposed between the first polarizer 400 and the fresnel lens 200; the lens assembly may also be disposed between the fresnel lens 200 and the light source 100; lens assemblies may be disposed between the first polarizer 400 and the fresnel lens 200 and between the fresnel lens 200 and the light source 100, and may be disposed according to specific needs, which is not specifically limited in the embodiments of the present application. The lens assembly may include one lens or a combination of a plurality of lenses.
Illustratively, the lens assembly may include one or more combinations of concave lenses, convex lenses, fresnel lenses, planar lenses, etc., and may be configured according to specific functional requirements, which is not specifically limited in the embodiments of the present application.
It should be noted that, in the foregoing embodiments, the description of each embodiment has an emphasis, and reference may be made to the related description of other embodiments for a part that is not described in detail in a certain embodiment.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
While preferred embodiments of the present specification have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all changes and modifications that fall within the scope of the specification.
It will be apparent to those skilled in the art that various changes and modifications can be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, then such modifications and variations are also intended to be included in the present specification.
Claims (13)
1. A display device, comprising:
a light source;
at least one Fresnel lens, wherein one side of the Fresnel lens, which is provided with an annular convex part, is arranged towards the light source, the annular convex part of the Fresnel lens is provided with a first phase retardation film, the first phase retardation film is used for converting first polarized light into second polarized light, and the first polarized light is obtained based on light of the light source;
the first polaroid is arranged on one side, far away from the light source, of the Fresnel lens and used for transmitting the first polarized light and filtering the second polarized light.
2. The display device according to claim 1, further comprising:
a second phase retardation film disposed between the first polarizer and the fresnel lens, the second phase retardation film converting the second polarized light into a third polarized light, and an optical axis direction of the second phase retardation film being the same as an optical axis direction of the first phase retardation film;
the first polarizer is used for filtering the third polarized light.
3. The display device according to claim 2,
the first polarized light is linearly polarized light, and the second polarized light is non-linearly polarized light.
4. The display device according to claim 2, further comprising:
a third phase retardation film having an optical axis direction perpendicular to the optical axis direction of the first phase retardation film;
the Fresnel lens further comprises a middle convex part, and the annular convex part surrounds the middle convex part; or the like, or, alternatively,
the Fresnel lens further comprises an intermediate concave portion and an annular concave portion, the annular concave portion surrounds the intermediate concave portion, the annular convex portion is formed between the adjacent annular concave portions, or the annular convex portion is formed between the annular concave portion and the intermediate concave portion;
the third phase retardation film is provided on a side surface of the annular convex portion and a surface of the intermediate convex portion or the intermediate concave portion.
5. The display device according to claim 4,
the first phase delay film, the second phase delay film and the third phase delay film are all phase delay films with non-integral multiple wavelengths.
6. The display device according to claim 4,
the first phase delay film is a phase delay film with 1/4 wavelength; and/or the presence of a gas in the gas,
the second phase delay film is a phase delay film with the wavelength of 1/4; and/or the presence of a gas in the gas,
the third phase delay film is a phase delay film with 1/4 wavelength.
7. The display device according to claim 1,
the first phase delay film is arranged on the end face of the annular convex part close to one end of the light source.
8. The display device according to claim 1,
the first phase delay film is arranged on the annular convex part in a coating, coating or spraying mode.
9. The display device according to claim 1,
and a second polaroid is arranged on one side of the light source close to the Fresnel lens and is used for transmitting the first polarized light in the light of the light source.
10. The display device according to claim 1,
the first polarizer includes an absorption-type polarizer and/or a linear polarizer.
11. The display device according to claim 1, further comprising:
and the lens component is arranged between the first polaroid and the Fresnel lens and/or between the Fresnel lens and the light source.
12. The display device according to claim 1,
the display device is a VR display device.
13. The display device according to any one of claims 1 to 12,
the light source includes a display panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210849468.2A CN115185086A (en) | 2022-07-19 | 2022-07-19 | Display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210849468.2A CN115185086A (en) | 2022-07-19 | 2022-07-19 | Display device |
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| CN115185086A true CN115185086A (en) | 2022-10-14 |
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| CN202210849468.2A Pending CN115185086A (en) | 2022-07-19 | 2022-07-19 | Display device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201428386A (en) * | 2012-12-27 | 2014-07-16 | E Vision Smart Optics Inc | Multi-layer liquid crystal lenslet array with improved alignment |
| CN108873334A (en) * | 2018-06-19 | 2018-11-23 | 平行现实（杭州）科技有限公司 | A kind of ultra thin optical amplification mould group and amplification system |
| CN209656995U (en) * | 2019-04-24 | 2019-11-19 | 歌尔科技有限公司 | Lens module and optical system and virtual reality device with it |
| CN111766705A (en) * | 2020-06-19 | 2020-10-13 | 江西微瑞光学有限公司 | Short-distance and high-lens-birefringence-tolerance optical imaging module |
| CN111948811A (en) * | 2019-05-17 | 2020-11-17 | 未来（北京）黑科技有限公司 | Head-up display device |
| TWM614817U (en) * | 2021-04-13 | 2021-07-21 | 雙瑩科技股份有限公司 | Optical system for miniaturized head-mounted display device |
| RU2757072C1 (en) * | 2020-08-19 | 2021-10-11 | Самсунг Электроникс Ко., Лтд. | Multi-zone adjustable lens |
| CN113740944A (en) * | 2021-09-06 | 2021-12-03 | 京东方科技集团股份有限公司 | Fresnel lens, Fresnel lens assembly and virtual reality display device |
| CN216561221U (en) * | 2021-04-19 | 2022-05-17 | 双莹科技股份有限公司 | Optical system of miniaturized head-mounted display |
-
2022
- 2022-07-19 CN CN202210849468.2A patent/CN115185086A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201428386A (en) * | 2012-12-27 | 2014-07-16 | E Vision Smart Optics Inc | Multi-layer liquid crystal lenslet array with improved alignment |
| CN108873334A (en) * | 2018-06-19 | 2018-11-23 | 平行现实（杭州）科技有限公司 | A kind of ultra thin optical amplification mould group and amplification system |
| CN209656995U (en) * | 2019-04-24 | 2019-11-19 | 歌尔科技有限公司 | Lens module and optical system and virtual reality device with it |
| CN111948811A (en) * | 2019-05-17 | 2020-11-17 | 未来（北京）黑科技有限公司 | Head-up display device |
| CN111766705A (en) * | 2020-06-19 | 2020-10-13 | 江西微瑞光学有限公司 | Short-distance and high-lens-birefringence-tolerance optical imaging module |
| RU2757072C1 (en) * | 2020-08-19 | 2021-10-11 | Самсунг Электроникс Ко., Лтд. | Multi-zone adjustable lens |
| TWM614817U (en) * | 2021-04-13 | 2021-07-21 | 雙瑩科技股份有限公司 | Optical system for miniaturized head-mounted display device |
| CN216561221U (en) * | 2021-04-19 | 2022-05-17 | 双莹科技股份有限公司 | Optical system of miniaturized head-mounted display |
| CN113740944A (en) * | 2021-09-06 | 2021-12-03 | 京东方科技集团股份有限公司 | Fresnel lens, Fresnel lens assembly and virtual reality display device |
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