CN110187585A - A kind of liquid crystal optics eyeglass and virtual reality display device - Google Patents
A kind of liquid crystal optics eyeglass and virtual reality display device Download PDFInfo
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- CN110187585A CN110187585A CN201910542190.2A CN201910542190A CN110187585A CN 110187585 A CN110187585 A CN 110187585A CN 201910542190 A CN201910542190 A CN 201910542190A CN 110187585 A CN110187585 A CN 110187585A
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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
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- 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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
- G02F1/292—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 position or the direction of light beams, i.e. deflection by controlled diffraction or phased-array beam steering
-
- 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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
- G02F1/294—Variable focal length devices
Abstract
The invention discloses a kind of liquid crystal optics eyeglass and virtual reality display devices, wherein, in liquid crystal optics eyeglass, the refractive index of first diffraction lens is equal with the abnormal optical index of liquid crystal molecule, the refractive index of second diffraction lens and the ordinary refractive of liquid crystal molecule are equal, when no power, long axis of liquid crystal molecule direction is parallel with the light transmission shaft of polaroid, liquid crystal layer is in abnormal optical index state with respect to incident polarized light, second diffraction lens plays lens effect, and the first diffraction lens plays plate glass effect；When energized, long axis of liquid crystal molecule direction is vertical with the light transmission shaft of polaroid, and liquid crystal layer is in ordinary refractive state with respect to incident polarized light, and the first diffraction lens plays lens effect, and the second diffraction lens plays plate glass effect.Therefore, liquid crystal optics eyeglass provided in an embodiment of the present invention compared to mechanically realize zoom have the advantages that at low cost, eyeglass is thin and small in size, it is easy to operate, convenient for human eye wearing.
Description
Technical field
The present invention relates to optical technical field, espespecially a kind of liquid crystal optics eyeglass and virtual reality display device.
Background technique
Currently, focal power variable lens can use mechanical zoom method to realize, but mechanical zoom method valuableness is simultaneously
And volume is excessive, is unable to satisfy the wearing requirement of human eye.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of liquid crystal optics eyeglass and virtual reality display device, to realize
A kind of liquid crystal optics eyeglass of frivolous and lower-cost changeable focal length.
A kind of liquid crystal optics eyeglass provided in an embodiment of the present invention, comprising: the first substrate and the second substrate being oppositely arranged,
Liquid crystal layer between the first substrate and the second substrate；Wherein,
The first substrate towards the second substrate side includes the first transparency electrode being cascading, first spreads out
Penetrate lens and the first alignment film；
The second substrate towards the first substrate side includes the second transparency electrode being cascading, second spreads out
Penetrate lens and the second alignment film；
The first substrate is set away from the second substrate side or the second substrate away from the first substrate side
It is equipped with polaroid；
The alignment direction of first alignment film and second alignment film is parallel with the light transmission shaft of the polaroid；
The refractive index of first diffraction lens is equal with the abnormal optical index of liquid crystal molecule in the liquid crystal layer, described
The refractive index of second diffraction lens is equal with the ordinary refractive of liquid crystal molecule in the liquid crystal layer；First diffraction lens
Focal length it is not identical as the focal length of second diffraction lens.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, first diffraction lens and described second
Diffraction lens described at least one of diffraction lens includes a circular phase grating unit and multiple concentric rings
The phase grating unit of shape；
The center of the phase grating unit of the multiple annular with the circular phase grating unit
The center of circle is overlapped；
The side of the phase grating unit of the annular is directed toward by the center of circle of the circular phase grating unit
To the outer radius of phase grating unit successively increases, and the boundary linking of adjacent phase grating unit.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, in the diffraction lens, each phase is spread out
Penetrating raster unit includes N number of step, and the phase difference of adjacent step is 2 π/N, step height h=λ/N (ne-no)；
Wherein, N=2m, m is the arbitrary integer more than or equal to 1；neFor the abnormal optical index of liquid crystal molecule, noFor liquid
The ordinary refractive of brilliant molecule, λ are lambda1-wavelength.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, in the diffraction lens, by described circular
It is directed toward the direction of the phase grating unit of the annular, j-th of phase grating in the center of circle of phase grating unit
The exradius r of i-th of step in unitj,iWith the focal length f of the diffraction lens1Meet following relationship:
Wherein, j is the positive integer less than or equal to M, and i is the positive integer less than or equal to N, and M is in the diffraction lens
Phase grating unit.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, in the diffraction lens, j-th of phase is spread out
Penetrate the step width d of i-th of step in raster unitj,i=rj,i-rj,-i1。
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, m=3.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, in each described of first diffraction lens
In phase grating unit, the phase diffractive light of the annular is directed toward by the center of circle of the circular phase grating unit
The height in the direction of grid unit, the relatively described first substrate surface of the ledge surface is sequentially increased or is sequentially reduced.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, in each described of second diffraction lens
In phase grating unit, the phase diffractive light of the annular is directed toward by the center of circle of the circular phase grating unit
The height in the direction of grid unit, the relatively described the second substrate surface of the ledge surface is sequentially increased or is sequentially reduced.
Correspondingly, the embodiment of the invention also provides a kind of virtual reality display devices, including display panel, and are located at
Any liquid crystal optics eyeglass provided in an embodiment of the present invention of the display panel light emission side.
It optionally, further include being located at the liquid crystal optics in virtual reality display device provided in an embodiment of the present invention
Eyeglass deviates from the guiding device of the display panel side.
The present invention has the beneficial effect that:
Above-mentioned liquid crystal optics eyeglass and virtual reality display device provided in an embodiment of the present invention, wherein liquid crystal optics mirror
Piece includes that the first transparency electrode that is cascading towards the second substrate side of first substrate, the first diffraction lens and first are matched
To film；Second transparency electrode that the second substrate is cascading towards first substrate side, the second diffraction lens and second are matched
To film；Liquid crystal layer between first substrate and the second substrate；First substrate deviates from the second substrate side or the second substrate
Polaroid away from first substrate side.Wherein, the abnormal optical index of the refractive index of the first diffraction lens and liquid crystal molecule
(ne) equal, the refractive index of the second diffraction lens and the ordinary refractive (n of liquid crystal moleculeo) equal, the first alignment film and second
The alignment direction of alignment film is parallel with the light transmission shaft of polaroid, when first transparency electrode and second transparency electrode do not apply voltage
When, long axis of liquid crystal molecule direction is parallel with the light transmission shaft of polaroid, and liquid crystal layer is in abnormal optical index with respect to incident polarized light
(ne) state, the second diffraction lens lens effect, the first diffraction lens plate glass effect；When first transparency electrode and the
There are when voltage difference between two transparent electrodes, long axis of liquid crystal molecule direction is vertical with the light transmission shaft of polaroid, and liquid crystal layer enters relatively
It penetrates polarised light and is in ordinary refractive (no) state, the first diffraction lens lens effect, the second diffraction lens plate glass
Glass effect.Therefore, liquid crystal optics eyeglass provided in an embodiment of the present invention, by being powered or powering off the switching, it can be achieved that focal length, phase
Than mechanically realize zoom have the advantages that at low cost, eyeglass is thin and small in size, it is easy to operate, convenient for human eye wear.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Fig. 2 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Fig. 3 is a kind of overlooking structure diagram of diffraction lens provided in an embodiment of the present invention；
Fig. 4 is schematic cross-section of the diffraction lens shown in Fig. 3 along the direction A-A '；
Fig. 5 is a kind of partial sectional schematic view of diffraction lens provided in an embodiment of the present invention；
Fig. 6 is the partial sectional schematic view of another diffraction lens provided in an embodiment of the present invention；
Fig. 7 is the partial sectional schematic view of another diffraction lens provided in an embodiment of the present invention；
Fig. 8 a is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Fig. 8 b is structural schematic diagram of the liquid crystal optics eyeglass shown in Fig. 8 a when being powered；
Fig. 9 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Figure 10 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Figure 11 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Figure 12 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Figure 13 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Figure 14 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Figure 15 is another structural schematic diagram of liquid crystal optics eyeglass provided in an embodiment of the present invention；
Figure 16 a is the overlooking structure diagram of another diffraction lens provided in an embodiment of the present invention；
Figure 16 b is the phase of the corresponding virtual annular of phase grating unit of each arc in diffraction lens shown in Figure 16 a
The schematic diagram of position diffraction grating unit；
Figure 17 is a kind of structural schematic diagram of virtual reality display device provided in an embodiment of the present invention；
Figure 18 is another structural schematic diagram of virtual reality display device provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
The shapes and sizes of each component do not reflect actual proportions in attached drawing, and purpose is schematically illustrate the content of present invention.
A kind of liquid crystal optics eyeglass provided in an embodiment of the present invention, as depicted in figs. 1 and 2, comprising: first be oppositely arranged
Substrate 10 and the second substrate 20, the liquid crystal layer 30 between first substrate 10 and the second substrate 20；Wherein,
First substrate 10 includes the first transparency electrode 11 being cascading, the first diffraction towards 20 side of the second substrate
Lens 12 and the first alignment film 13；
The second substrate 20 includes the second transparency electrode 21 being cascading, the second diffraction towards 10 side of first substrate
Lens 22 and the second alignment film 23；
As shown in Figure 1, first substrate 10 is provided with polaroid 40 away from 20 side of the second substrate；Or as shown in Fig. 2, second
Substrate 20 is provided with polaroid 40 away from 10 side of first substrate；
The alignment direction of first alignment film 13 and the second alignment film 23 is parallel with the light transmission shaft of polaroid 40；
Abnormal optical index (the n of liquid crystal molecule in the refractive index and liquid crystal layer 30 of first diffraction lens 12e) equal, second
Ordinary refractive (the n of liquid crystal molecule in the refractive index and liquid crystal layer 30 of diffraction lens 22o) equal；First diffraction lens 12
Focal length is not identical as the focal length of the second diffraction lens 22.
Liquid crystal optics eyeglass provided in an embodiment of the present invention, including first substrate are stacked gradually towards the second substrate side and are set
First transparency electrode, the first diffraction lens and the first alignment film set；The second substrate is stacked gradually towards first substrate side and is set
Second transparency electrode, the second diffraction lens and the second alignment film set；Liquid crystal layer between first substrate and the second substrate；
First substrate deviates from the polaroid of first substrate side away from the second substrate side or the second substrate.Wherein, the first diffraction is saturating
The refractive index of mirror and the abnormal optical index (n of liquid crystal moleculee) equal, the refractive index of the second diffraction lens and putting down for liquid crystal molecule
Ordinary light refractive index (no) equal, the alignment direction of the first alignment film and the second alignment film is parallel with the light transmission shaft of polaroid, when
When first transparency electrode and second transparency electrode do not apply voltage, long axis of liquid crystal molecule direction is parallel with the light transmission shaft of polaroid,
Liquid crystal layer is in abnormal optical index (n with respect to incident polarized lighte) state, the second diffraction lens lens effect, the first diffraction
Lens play plate glass effect；When between first transparency electrode and second transparency electrode there are when voltage difference, long axis of liquid crystal molecule
Direction is vertical with the light transmission shaft of polaroid, and liquid crystal layer is in ordinary refractive (n with respect to incident polarized lighto) state, first spreads out
It penetrates lens and plays lens effect, the second diffraction lens plays plate glass effect.Therefore, liquid crystal optics mirror provided in an embodiment of the present invention
Piece, by being powered or powering off the switching, it can be achieved that focal length, compared to mechanically realization zoom at low cost, eyeglass is thin
And the advantages of small in size, easy to operate, convenient for human eye wearing.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, as shown in figure 3, the first diffraction lens and
At least one diffraction lens in two diffraction lens includes a circular phase grating unit and multiple concentric annulars
Phase grating unit；Wherein, Fig. 3 includes a circular phase grating unit 121 and two with diffraction lens
For the phase grating unit 122 and 123 of concentric annular；
The center of the phase grating unit (122 and 123) of multiple annulars with circular phase grating unit
121 center of circle O is overlapped；
Phase grating unit (122 Hes of annular are directed toward by the center of circle O of circular phase grating unit 121
123) outer radius in direction, phase grating unit (121,122 and 123) successively increases, and adjacent phase diffractive light
The boundary of grid unit is connected.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, as shown in Figures 3 to 6, in diffraction lens,
Each phase grating unit 121,122 and 123) include N number of step, and the phase difference of adjacent step is 2 π/N, step is high
Spend h=λ/N (ne-no)；
Wherein, N=2m, m is the arbitrary integer more than or equal to 1；neFor the abnormal optical index of liquid crystal molecule, noFor liquid
The ordinary refractive of brilliant molecule, λ are lambda1-wavelength.
Wherein, Fig. 3 and Fig. 4 is with m=1, and for N=2, Fig. 5 is with m=2, and for N=4, Fig. 6 and Fig. 7 are with m=3, N
For=8.Specifically, Fig. 3 illustrates the top partial view diagram for the diffraction lens being made of two stepped phase diffraction grating units, figure
4 illustrate diffraction lens shown in Fig. 3 along the schematic cross-section in the direction A-A ', and Fig. 5 is illustrated by four stepped phase diffraction grating lists
The partial section view for the diffraction lens that member is constituted, Fig. 6 and Fig. 7 illustrate the diffraction being made of eight stepped phase diffraction grating units
The partial section view of lens.
In the specific implementation, the diffraction efficiency of the diffraction lens of different numbers of steps is different, and numbers of steps is more, diffraction
Efficiency is higher, but technology difficulty is bigger.Preferably, in liquid crystal optics eyeglass provided in an embodiment of the present invention, m=3, N=8
For.
In the specific implementation, when incident light is white light polychromatic light, λ=555nm is usually taken.
In addition, in liquid crystal optics eyeglass provided in an embodiment of the present invention, the quantity and diffraction of phase grating unit
The diameter of lens is wide related, and on the certain substrate of numbers of steps N, the diameter of diffraction lens is wide bigger, and the area of diffraction lens is bigger,
The quantity for the phase grating unit that diffraction lens includes is more.
In the specific implementation, in liquid crystal optics eyeglass provided in an embodiment of the present invention, spread out in each phase of diffraction lens
It penetrates in raster unit, as shown in Figures 4 to 6, is spread out by the phase that annular is directed toward in the center of circle of circular phase grating unit 121
The direction of raster unit 122 and 123 is penetrated, ledge surface successively increases, alternatively, as shown in fig. 7, ledge surface successively reduces.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, in diffraction lens, by circular phase diffractive
The direction of the phase grating unit of annular is directed toward in the center of circle of raster unit, and according to the property of diffraction lens, j-th of phase is spread out
Penetrate the exradius r of i-th of step in raster unitj,iWith the focal length f of diffraction lens1Meet following relationship:
Wherein, j is the positive integer less than or equal to M, and i is the positive integer less than or equal to N, and M is phase in diffraction lens
Diffraction grating unit.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, in diffraction lens, j-th of phase diffractive light
The step width d of i-th of step in grid unitj,i=rj,i-rj,-i1。
In the specific implementation, according to formula h=λ/N (ne-no)；dj,i=rj,i-rj,i-1Just
It can be designed the step height of the diffraction lens of any focal length and the parameter distribution of step width.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, such as Fig. 8 a, Fig. 8 b, Fig. 9, Figure 12 and Figure 13
It is shown, in each phase grating unit of the first diffraction lens 12, referred to by the center of circle of circular phase grating unit
To the direction of the phase grating unit of annular, ledge surface successively increases with respect to the height on 10 surface of first substrate；Alternatively,
As shown in Figure 10, Figure 11, Figure 14 and Figure 15, in each phase grating unit of the first diffraction lens 12, by circular phase
The direction of the phase grating unit of annular is directed toward in the center of circle of position diffraction grating unit, and ledge surface is with respect to 10 table of first substrate
The height in face successively reduces.
Optionally, in liquid crystal optics eyeglass provided in an embodiment of the present invention, such as Fig. 8 a, Fig. 8 b, Figure 10, Figure 12 and Figure 14
It is shown, in each phase grating unit of the second diffraction lens 22, referred to by the center of circle of circular phase grating unit
To the direction of the phase grating unit of annular, ledge surface successively increases with respect to the height on 20 surface of the second substrate, alternatively,
As shown in Fig. 9, Figure 11, Figure 13 and Figure 15, in each phase grating unit of the second diffraction lens 22, by circular phase
The direction of the phase grating unit of annular is directed toward in the center of circle of diffraction grating unit, and ledge surface is with respect to 20 surface of the second substrate
Height successively reduce.
Liquid crystal optics eyeglass provided in an embodiment of the present invention is described in detail below by specific embodiment.
In each embodiment below, the abnormal light of liquid crystal molecule is rolled in the refractive index and liquid crystal layer 30 of the first diffraction lens 12
Penetrate rate (ne) equal, the ordinary refractive (n of liquid crystal molecule in the refractive index and liquid crystal layer 30 of the second diffraction lens 22o) equal.
Wherein, for embodiment one to example IV, polaroid 40 is located at first substrate 10 away from 20 side of the second substrate；Embodiment five is to reality
Example eight is applied, polaroid 40 is located at the second substrate 20 away from 10 side of first substrate.
Embodiment one,
As shown in Figure 8 a, polaroid 40 is located at first substrate 10 away from 20 side of the second substrate, in the first diffraction lens 12
Each phase grating unit in, by circular phase grating unit the center of circle be directed toward annular phase grating list
The direction of member, ledge surface successively increase with respect to the height on 10 surface of first substrate, spread out in each phase of the second diffraction lens 22
It penetrates in raster unit, the direction of the phase grating unit of annular is directed toward by the center of circle of circular phase grating unit,
Ledge surface successively increases with respect to the height on 20 surface of the second substrate.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
State is as shown in Figure 8 a, and long axis is parallel with the light transmission shaft of polaroid 40, and liquid crystal layer 30 has abnormal light relative to incident polarized light
Refractive index (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, it is therefore, right
The liquid crystal deflection state shown in Fig. 8 a, the first diffraction lens 12 of the state play plate glass effect, the second diffraction lens 22
Playing focal length is f12(Positive value) lens effect, the liquid crystal optics eyeglass generally focal length f12Lens effect, focal power Φ12。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
For two transparent electrodes 21 there are when voltage difference, the deflection state of the liquid crystal molecule in liquid crystal layer 30 is as shown in Figure 8 b, long axis and partially
The light transmission shaft of mating plate 40 is vertical, and liquid crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the second diffraction
The refractive index of lens 22 and the ordinary refractive (n of liquid crystal moleculeo) identical, therefore, for liquid crystal deflection shape shown in Fig. 8 b
State, the second diffraction lens 22 of the state play plate glass effect, and it is f that the first diffraction lens 12, which plays focal length,11The lens of (negative value)
Effect, the liquid crystal optics eyeglass generally focal length f11Lens effect, focal power Φ11。
For the liquid crystal optics eyeglass in embodiment one, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can carry out positive and negative values switching, which can be used to form near-sighted glasses and farsighted glasses handoff functionality.Specifically
, when first transparency electrode, second transparency electrode power-off, the focal power of the liquid crystal optics eyeglass is Φ12, because of Φ12It is positive
Value, so the liquid crystal optics eyeglass can be used for hyperopic lens；When first transparency electrode, second transparency electrode are powered, the liquid crystal
Optical mirror slip focal power is Φ11, because of Φ11For negative value, so the liquid crystal optics eyeglass can be used for concave lens.
Embodiment two,
As shown in figure 9, polaroid 40 is located at first substrate 10 away from 20 side of the second substrate, in the first diffraction lens 12
In each phase grating unit, the phase grating unit of annular is directed toward by the center of circle of circular phase grating unit
Direction, ledge surface successively increases with respect to the height on 10 surface of first substrate, in each phase diffractive of the second diffraction lens 22
In raster unit, the direction of the phase grating unit of annular, platform are directed toward by the center of circle of circular phase grating unit
Rank surface is successively reduced with respect to the height on 20 surface of the second substrate.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
For state as shown in figure 9, its long axis is parallel with the light transmission shaft of polaroid 40, liquid crystal layer 30 has abnormal light folding relative to incident polarized light
Penetrate rate (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, therefore, for
Liquid crystal deflection state shown in Fig. 9, the first diffraction lens 12 of the state play plate glass effect, and the second diffraction lens 22 plays coke
Away from for f22The lens effect of (negative value), the liquid crystal optics eyeglass generally focal length f22Lens effect, focal power Φ22。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
Two transparent electrodes 21 are there are when voltage difference, and the long axis of the liquid crystal molecule in liquid crystal layer 30 is vertical with the light transmission shaft of polaroid 40, liquid
Crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the refractive index of the second diffraction lens 22 and liquid crystal point
Ordinary refractive (the n of sono) identical, therefore, the second diffraction lens 22 plays plate glass effect, and the first diffraction lens 12 plays coke
Away from for f21The lens effect of (negative value), the liquid crystal optics eyeglass generally focal length f21Lens effect, focal power Φ21。
For the liquid crystal optics eyeglass in embodiment two, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can switch over, which can be used to form near-sighted glasses and farsighted glasses handoff functionality.Specifically, when the
When one transparent electrode, second transparency electrode power-off, the focal power of the liquid crystal optics eyeglass is Φ22, because of Φ22For negative value, so
The liquid crystal optics eyeglass can be used for concave lens；When first transparency electrode, second transparency electrode are powered, the liquid crystal optics eyeglass
Focal power is Φ21, because of Φ21For negative value, so the liquid crystal optics eyeglass can be used for concave lens.Due to two kinds of focal power Φ21
And Φ22It is negative value, therefore the liquid crystal optics eyeglass can be used for two kinds of changeable concave lens of diopter (focal power).
Embodiment three,
As shown in Figure 10, polaroid 40 is located at first substrate 10 away from 20 side of the second substrate, in the first diffraction lens 12
Each phase grating unit in, by circular phase grating unit the center of circle be directed toward annular phase grating list
The direction of member, ledge surface successively reduce with respect to the height on 10 surface of first substrate, spread out in each phase of the second diffraction lens 22
It penetrates in raster unit, the direction of the phase grating unit of annular is directed toward by the center of circle of circular phase grating unit,
Ledge surface successively increases with respect to the height on 20 surface of the second substrate.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
State is as shown in Figure 10, and long axis is parallel with the light transmission shaft of polaroid 40, and liquid crystal layer 30 has abnormal light relative to incident polarized light
Refractive index (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, it is therefore, right
In liquid crystal deflection state shown in Fig. 10, the first diffraction lens 12 of the state plays plate glass effect, the second diffraction lens 22
Playing focal length is f32The lens effect of (positive value), the liquid crystal optics eyeglass generally focal length f32Lens effect, focal power Φ32。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
Two transparent electrodes 21 are there are when voltage difference, and the long axis of the liquid crystal molecule in liquid crystal layer 30 is vertical with the light transmission shaft of polaroid 40, liquid
Crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the refractive index of the second diffraction lens 22 and liquid crystal point
Ordinary refractive (the n of sono) identical, therefore, the second diffraction lens 22 plays plate glass effect, and the first diffraction lens 12 plays coke
Away from for f31The lens effect of (positive value), the liquid crystal optics eyeglass generally focal length f31Lens effect, focal power Φ31。
For the liquid crystal optics eyeglass in embodiment three, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can switch over, specifically, when first transparency electrode, second transparency electrode power-off, the liquid crystal optics eyeglass
Focal power is Φ32, because of Φ32For positive value, so the liquid crystal optics eyeglass can be used for hyperopic lens；When first transparency electrode,
When two transparent electrodes are powered, which is Φ31, because of Φ31For positive value, so the liquid crystal optics eyeglass
It can be used for hyperopic lens.Due to two kinds of focal power Φ31And Φ32It is positive value, therefore the liquid crystal optics eyeglass can be used for two kinds of views
Spend (focal power) changeable hyperopic lens.
For liquid crystal optics eyeglass in embodiment three, due to two kinds of focal length f31And f32It is positive value, is closed according to optics image
System, the lens of different focal length, can be at the virtual image of different spaces depth to the display device of identical object distance.Therefore liquid in embodiment seven
Brilliant optical mirror slip can also be used in virtual reality shown in Figure 17 (VR) device.
Example IV,
As shown in figure 11, polaroid 40 is located at first substrate 10 away from 20 side of the second substrate, in the first diffraction lens 12
Each phase grating unit in, by circular phase grating unit the center of circle be directed toward annular phase grating list
The direction of member, ledge surface is successively reduced with respect to the height on first substrate surface, in each phase diffractive light of the second diffraction lens
In grid unit, the direction of the phase grating unit of annular, step are directed toward by the center of circle of circular phase grating unit
Surface is successively reduced with respect to the height on the second substrate surface.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
State is as shown in figure 11, and long axis is parallel with the light transmission shaft of polaroid 40, and liquid crystal layer 30 has abnormal light relative to incident polarized light
Refractive index (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, it is therefore, right
The liquid crystal deflection state shown in Figure 11, the first diffraction lens 12 of the state play plate glass effect, the second diffraction lens 22
Playing focal length is f42The lens effect of (negative value), the liquid crystal optics eyeglass generally focal length f42Lens effect, focal power Φ42。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
Two transparent electrodes 21 are there are when voltage difference, and the long axis of the liquid crystal molecule in liquid crystal layer 30 is vertical with the light transmission shaft of polaroid 40, liquid
Crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the refractive index of the second diffraction lens 22 and liquid crystal point
Ordinary refractive (the n of sono) identical, therefore, the second diffraction lens 22 plays plate glass effect, and the first diffraction lens 12 plays coke
Away from for f41The lens effect of (positive value), the liquid crystal optics eyeglass generally focal length f41Lens effect, focal power Φ41。
For the liquid crystal optics eyeglass in example IV, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can carry out positive and negative values switching, which can be used to form near-sighted glasses and farsighted glasses handoff functionality.Specifically
, when first transparency electrode, second transparency electrode power-off, the focal power of the liquid crystal optics eyeglass is Φ42, because of Φ42It is negative
Value, so the liquid crystal optics eyeglass can be used for concave lens；When first transparency electrode, second transparency electrode are powered, the liquid crystal
Optical mirror slip focal power is Φ41, because of Φ41For positive value, so the liquid crystal optics eyeglass can be used for hyperopic lens.
Embodiment five,
As shown in figure 12, polaroid 40 is located at the second substrate 20 away from 10 side of first substrate, in the first diffraction lens 12
Each phase grating unit in, by circular phase grating unit the center of circle be directed toward annular phase grating list
The direction of member, ledge surface successively increase with respect to the height on 10 surface of first substrate, spread out in each phase of the second diffraction lens 22
It penetrates in raster unit, the direction of the phase grating unit of annular is directed toward by the center of circle of circular phase grating unit,
Ledge surface successively increases with respect to the height on 20 surface of the second substrate.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
State is as shown in figure 12, and long axis is parallel with the light transmission shaft of polaroid 40, and liquid crystal layer 30 has abnormal light relative to incident polarized light
Refractive index (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, it is therefore, right
The liquid crystal deflection state shown in Figure 12, the first diffraction lens 12 of the state play plate glass effect, the second diffraction lens 22
Playing focal length is f52The lens effect of (positive value), the liquid crystal optics eyeglass generally focal length f52Lens effect, focal power Φ52。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
Two transparent electrodes 21 are there are when voltage difference, and the long axis of the liquid crystal molecule in liquid crystal layer 30 is vertical with the light transmission shaft of polaroid 40, liquid
Crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the refractive index of the second diffraction lens 22 and liquid crystal point
Ordinary refractive (the n of sono) identical, therefore, the second diffraction lens 22 plays plate glass effect, and the first diffraction lens 12 plays coke
Away from for f51The lens effect of (negative value), the liquid crystal optics eyeglass generally focal length f51Lens effect, focal power Φ51。
For the liquid crystal optics eyeglass in embodiment five, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can carry out positive and negative values switching, which can be used to form near-sighted glasses and farsighted glasses handoff functionality.Specifically
, when first transparency electrode, second transparency electrode power-off, the focal power of the liquid crystal optics eyeglass is Φ52, because of Φ52It is positive
Value, so the liquid crystal optics eyeglass can be used for hyperopic lens；When first transparency electrode, second transparency electrode are powered, the liquid crystal
Optical mirror slip focal power is Φ51, because of Φ51For negative value, so the liquid crystal optics eyeglass can be used for concave lens.
Embodiment six,
As shown in figure 13, polaroid 40 is located at the second substrate 20 away from 10 side of first substrate, in the first diffraction lens 12
Each phase grating unit in, by circular phase grating unit the center of circle be directed toward annular phase grating list
The direction of member, ledge surface successively increase with respect to the height on 10 surface of first substrate, spread out in each phase of the second diffraction lens 22
It penetrates in raster unit, the direction of the phase grating unit of annular is directed toward by the center of circle of circular phase grating unit,
Ledge surface is successively reduced with respect to the height on 20 surface of the second substrate.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
State is as shown in figure 13, and long axis is parallel with the light transmission shaft of polaroid 40, and liquid crystal layer 30 has abnormal light relative to incident polarized light
Refractive index (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, it is therefore, right
The liquid crystal deflection state shown in Figure 13, the first diffraction lens 12 of the state play plate glass effect, the second diffraction lens 22
Playing focal length is f62The lens effect of (negative value), the liquid crystal optics eyeglass generally focal length f62Lens effect, focal power Φ62。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
Two transparent electrodes 21 are there are when voltage difference, and the long axis of the liquid crystal molecule in liquid crystal layer 30 is vertical with the light transmission shaft of polaroid 40, liquid
Crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the refractive index of the second diffraction lens 22 and liquid crystal point
Ordinary refractive (the n of sono) identical, therefore, the second diffraction lens 22 plays plate glass effect, and the first diffraction lens 12 plays coke
Away from for f61The lens effect of (negative value), the liquid crystal optics eyeglass generally focal length f61Lens effect, focal power Φ61。
For the liquid crystal optics eyeglass in embodiment six, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can switch over, which can be used to form near-sighted glasses and farsighted glasses handoff functionality.Specifically, when the
When one transparent electrode, second transparency electrode power-off, the focal power of the liquid crystal optics eyeglass is Φ62, because of Φ62For negative value, so
The liquid crystal optics eyeglass can be used for concave lens；When first transparency electrode, second transparency electrode are powered, the liquid crystal optics eyeglass
Focal power is Φ61, because of Φ61For negative value, so the liquid crystal optics eyeglass can be used for concave lens.Due to two kinds of focal power Φ61
And Φ62It is negative value, therefore the liquid crystal optics eyeglass can be used for two kinds of changeable concave lens of diopter (focal power).
Embodiment seven,
As shown in figure 14, polaroid 40 is located at the second substrate 20 away from 10 side of first substrate, in the first diffraction lens 12
Each phase grating unit in, by circular phase grating unit the center of circle be directed toward annular phase grating list
The direction of member, ledge surface successively reduce with respect to the height on 10 surface of first substrate, spread out in each phase of the second diffraction lens 22
It penetrates in raster unit, the direction of the phase grating unit of annular is directed toward by the center of circle of circular phase grating unit,
Ledge surface successively increases with respect to the height on 20 surface of the second substrate.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
State is as shown in figure 14, and long axis is parallel with the light transmission shaft of polaroid 40, and liquid crystal layer 30 has abnormal light relative to incident polarized light
Refractive index (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, it is therefore, right
The liquid crystal deflection state shown in Figure 14, the first diffraction lens 12 of the state play plate glass effect, the second diffraction lens 22
Playing focal length is f72The lens effect of (positive value), the liquid crystal optics eyeglass generally focal length f72Lens effect, focal power Φ72。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
Two transparent electrodes 21 are there are when voltage difference, and the long axis of the liquid crystal molecule in liquid crystal layer 30 is vertical with the light transmission shaft of polaroid 40, liquid
Crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the refractive index of the second diffraction lens 22 and liquid crystal point
Ordinary refractive (the n of sono) identical, therefore, the second diffraction lens 22 plays plate glass effect, and the first diffraction lens 12 plays coke
Away from for f71The lens effect of (positive value), the liquid crystal optics eyeglass generally focal length f21Lens effect, focal power Φ21。
For the liquid crystal optics eyeglass in embodiment seven, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can switch over, specifically, when first transparency electrode, second transparency electrode power-off, the liquid crystal optics eyeglass
Focal power is Φ72, because of Φ72For positive value, so the liquid crystal optics eyeglass can be used for hyperopic lens；When first transparency electrode,
When two transparent electrodes are powered, which is Φ71, because of Φ71For positive value, so the liquid crystal optics eyeglass
It can be used for hyperopic lens.Due to two kinds of focal power Φ71And Φ72It is positive value, therefore the liquid crystal optics eyeglass can be used for two kinds of views
Spend (focal power) changeable hyperopic lens.
For liquid crystal optics eyeglass in embodiment seven, due to two kinds of focal length f71And f72It is positive value, is closed according to optics image
System, the lens of different focal length, can be at the virtual image of different spaces depth to the display device of identical object distance.Therefore liquid in embodiment seven
Brilliant optical mirror slip can also be used in virtual reality shown in Figure 17 (VR) device.
Embodiment eight,
As shown in figure 15, polaroid 40 is located at the second substrate 20 away from 10 side of first substrate, in the first diffraction lens 12
Each phase grating unit in, by circular phase grating unit the center of circle be directed toward annular phase grating list
The direction of member, ledge surface is successively reduced with respect to the height on first substrate surface, in each phase diffractive light of the second diffraction lens
In grid unit, the direction of the phase grating unit of annular, step are directed toward by the center of circle of circular phase grating unit
Surface is successively reduced with respect to the height on the second substrate surface.
When first transparency electrode 11 and not powered second transparency electrode 21, the deflection shape of the liquid crystal molecule in liquid crystal layer 30
State is as shown in figure 15, and long axis is parallel with the light transmission shaft of polaroid 40, and liquid crystal layer 30 has abnormal light relative to incident polarized light
Refractive index (ne).Because of the refractive index of the first diffraction lens 12 and the abnormal optical index (n of liquid crystal moleculee) identical, it is therefore, right
In liquid crystal deflection state shown in figure 15, the first diffraction lens 12 of the state plays plate glass effect, the second diffraction lens 22
Playing focal length is f82The lens effect of (negative value), the liquid crystal optics eyeglass generally focal length f82Lens effect, focal power Φ82。
Make first transparency electrode 11 and when applying voltage appropriate to first transparency electrode 11 and second transparency electrode 21
Two transparent electrodes 21 are there are when voltage difference, and the long axis of the liquid crystal molecule in liquid crystal layer 30 is vertical with the light transmission shaft of polaroid 40, liquid
Crystal layer 30 has ordinary refractive (n relative to incident polarized lighto).Because of the refractive index of the second diffraction lens 22 and liquid crystal point
Ordinary refractive (the n of sono) identical, therefore, the second diffraction lens 22 plays plate glass effect, and the first diffraction lens 12 plays coke
Away from for f81The lens effect of (positive value), the liquid crystal optics eyeglass generally focal length f81Lens effect, focal power Φ81。
For the liquid crystal optics eyeglass in embodiment eight, by selectively turning on the lens function of liquid crystal optics eyeglass,
Its focal power can carry out positive and negative values switching, which can be used to form near-sighted glasses and farsighted glasses handoff functionality.Specifically
, when first transparency electrode, second transparency electrode power-off, the focal power of the liquid crystal optics eyeglass is Φ82, because of Φ82It is negative
Value, so the liquid crystal optics eyeglass can be used for concave lens；When first transparency electrode, second transparency electrode are powered, the liquid crystal
Optical mirror slip focal power is Φ81, because of Φ81For positive value, so the liquid crystal optics eyeglass can be used for hyperopic lens.
In the specific implementation, liquid crystal optics eyeglass provided in an embodiment of the present invention is that design diffraction is saturating in liquid crystal environment
Mirror, therefore, it is necessary to combine the refractive index of liquid crystal molecule to carry out each parameter designing of diffraction lens, with model SLC123320's
For liquid crystal molecule, the refractive index characteristic of the liquid crystal molecule are as follows: ne=1.821, no=1.522, Δ n=ne-no=0.299.
Wherein neAbnormal optical index (refractive index of the linearly polarized light parallel with long axis of liquid crystal molecule direction), n are also for high refractive indexo
Ordinary refractive (refractive index of the linearly polarized light vertical with long axis of liquid crystal molecule direction) is also for low-refraction, according to formula
H=λ/N (ne-no) design height of each step can be found out.Such as: as N=2, h=981.6nm；As N=4, h=
490.8nm；As N=8, h=245.4nm.
Below by taking the first diffraction lens in embodiment one as an example, it is assumed that the focal power Φ of the first diffraction lens11=-1D (D
For diopter, 1D is commonly called as 100 degree of myopia), the focal length of lens value f corresponding to it11=-1000mm passes through formula h=λ/N (ne-
no) step height can be calculated, pass through formulaEach step can be calculated
Width distribution.Such as: for number of steps N=8, the diffraction lens that aperture is 20mm, each step exradius is distributed as r1,1=
383.1μm、r1,2=541.8 μm, r1,3=663.5 μm, r1,4=766.2 μm, r1,5=856.6 μm, r1,6=938.4 μm, r1,7
=1013.5 μm, r1,8=1083.5 μm, r2,1=1149.2 μm ..., the exradius r of the last one stepM,N=9989.6
μm.Wherein, M is the quantity of phase grating unit in diffraction lens.Each step width is distributed as d1,1=383.1 μm, d1,
2=158.7 μm, d1,3=121.8 μm, d1,4=102.6 μm, d1,5=90.4 μm, r1,6=81.8 μm, d1,7=75.2 μ
M, d1,8=70.0 μm, d2,1=65.7 μm ..., the width d of the last one stepM,N=7.3 μm.
Be given below different steps of the first diffraction lens in embodiment one in liquid crystal environment, different focal powers and
The partial parameters table of different pore size.
Table 1
Table 2
Table 3
Table 4
It should be noted that in the embodiment of the present invention one into embodiment eight, the first diffraction lens, the second diffraction lens
Parameters design is identical as the design method of the first diffraction lens in above-described embodiment, and details are not described herein.
Further, in liquid crystal optics eyeglass provided in an embodiment of the present invention, when the shape of diffraction lens is not round
When, such as further include the phase grating unit 120 positioned at diffraction lens edge arc when rectangle shown in Figure 16 a,
The phase grating unit 120 of middle arc is actually to stay in after the phase grating unit of virtual annular is cut
Part in diffraction lens.The case where shape for diffraction lens is other shapes, as shown in fig 16b, is equivalent to one
The figure of big circular initial diffraction lens as required forms the diffraction lens of target after being cut.The target diffraction is saturating
The figure of mirror is the figure of diffraction lens provided in an embodiment of the present invention.
Based on the same inventive concept, the embodiment of the invention also provides a kind of virtual reality display devices, as shown in figure 17,
Including display panel 1, and positioned at any liquid crystal optics eyeglass 2 provided in an embodiment of the present invention of 1 light emission side of display panel.
Since the principle that the virtual reality display device solves the problems, such as is similar to a kind of aforementioned liquid crystal optics eyeglass, the virtual reality
The implementation of display device may refer to the implementation of foregoing liquid crystal optical mirror slip, and overlaps will not be repeated.
In the specific implementation, as shown in figure 18, in virtual reality display device provided in an embodiment of the present invention, further include
Deviate from the guiding device 3 of display panel side positioned at liquid crystal optics eyeglass 2.
Above-mentioned liquid crystal optics eyeglass and virtual reality display device provided in an embodiment of the present invention, wherein liquid crystal optics mirror
Piece includes that the first transparency electrode that is cascading towards the second substrate side of first substrate, the first diffraction lens and first are matched
To film；Second transparency electrode that the second substrate is cascading towards first substrate side, the second diffraction lens and second are matched
To film；Liquid crystal layer between first substrate and the second substrate；First substrate deviates from the second substrate side or the second substrate
Polaroid away from first substrate side.Wherein, the abnormal optical index of the refractive index of the first diffraction lens and liquid crystal molecule
(ne) equal, the refractive index of the second diffraction lens and the ordinary refractive (n of liquid crystal moleculeo) equal, the first alignment film and second
The alignment direction of alignment film is parallel with the light transmission shaft of polaroid, when first transparency electrode and second transparency electrode do not apply voltage
When, long axis of liquid crystal molecule direction is parallel with the light transmission shaft of polaroid, and liquid crystal layer is in abnormal optical index with respect to incident polarized light
(ne) state, the second diffraction lens lens effect, the first diffraction lens plate glass effect；When first transparency electrode and the
There are when voltage difference between two transparent electrodes, long axis of liquid crystal molecule direction is vertical with the light transmission shaft of polaroid, and liquid crystal layer enters relatively
It penetrates polarised light and is in ordinary refractive (no) state, the first diffraction lens lens effect, the second diffraction lens plate glass
Glass effect.Therefore, liquid crystal optics eyeglass provided in an embodiment of the present invention, by being powered or powering off the switching, it can be achieved that focal length, phase
Than mechanically realize zoom have the advantages that at low cost, eyeglass is thin and small in size, it is easy to operate, convenient for human eye wear.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of liquid crystal optics eyeglass characterized by comprising the first substrate and the second substrate being oppositely arranged are located at described
Liquid crystal layer between first substrate and the second substrate；Wherein,
The first substrate includes that the first transparency electrode being cascading, the first diffraction are saturating towards the second substrate side
Mirror and the first alignment film；
The second substrate includes that the second transparency electrode being cascading, the second diffraction are saturating towards the first substrate side
Mirror and the second alignment film；
The first substrate is provided with away from the second substrate side or the second substrate away from the first substrate side
Polaroid；
The alignment direction of first alignment film and second alignment film is parallel with the light transmission shaft of the polaroid；
The refractive index of first diffraction lens is equal with the abnormal optical index of liquid crystal molecule in the liquid crystal layer, and described second
The refractive index of diffraction lens is equal with the ordinary refractive of liquid crystal molecule in the liquid crystal layer；The coke of first diffraction lens
Away from not identical as the focal length of second diffraction lens.
2. liquid crystal optics eyeglass as described in claim 1, which is characterized in that first diffraction lens and second diffraction
Diffraction lens described at least one of lens includes a circular phase grating unit and multiple concentric annulars
Phase grating unit；
The center of circle of the center of the phase grating unit of the multiple annular with the circular phase grating unit
It is overlapped；
The direction of the phase grating unit of the annular, phase are directed toward by the center of circle of the circular phase grating unit
The outer radius of position diffraction grating unit successively increases, and the boundary linking of adjacent phase grating unit.
3. liquid crystal optics eyeglass as claimed in claim 2, which is characterized in that in the diffraction lens, each phase diffractive
Raster unit includes N number of step, and the phase difference of adjacent step is 2 π/N, step height h=λ/N (ne-no)；
Wherein, N=2m, m is the arbitrary integer more than or equal to 1；neFor the abnormal optical index of liquid crystal molecule, noFor liquid crystal point
The ordinary refractive of son, λ is lambda1-wavelength.
4. liquid crystal optics eyeglass as claimed in claim 3, which is characterized in that in the diffraction lens, by the circular phase
It is directed toward the direction of the phase grating unit of the annular, j-th of phase grating list in the center of circle of position diffraction grating unit
The exradius r of i-th of step in memberj,iWith the focal length f of the diffraction lens1Meet following relationship:
Wherein, j is the positive integer less than or equal to M, and i is the positive integer less than or equal to N, and M is phase in the diffraction lens
Diffraction grating unit.
5. liquid crystal optics eyeglass as claimed in claim 4, which is characterized in that in the diffraction lens, j-th of phase diffractive light
The step width d of i-th of step in grid unitj,i=rj,i-rj,-i1。
6. liquid crystal optics eyeglass as claimed in claim 3, which is characterized in that m=3.
7. liquid crystal optics eyeglass as claimed in claim 3, which is characterized in that in each phase of first diffraction lens
In diffraction grating unit, the phase grating list of the annular is directed toward by the center of circle of the circular phase grating unit
The direction of member, the height on the relatively described first substrate surface of the ledge surface are sequentially increased or are sequentially reduced.
8. liquid crystal optics eyeglass as claimed in claim 3, which is characterized in that in each phase of second diffraction lens
In diffraction grating unit, the phase grating list of the annular is directed toward by the center of circle of the circular phase grating unit
The direction of member, the height on the relatively described the second substrate surface of the ledge surface are sequentially increased or are sequentially reduced.
9. a kind of virtual reality display device, which is characterized in that including display panel, and be located at the display panel light emission side
Such as the described in any item liquid crystal optics eyeglasses of claim 1-8.
10. virtual reality display device as claimed in claim 9, which is characterized in that further include being located at the liquid crystal optics mirror
Piece deviates from the guiding device of the display panel side.
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| CN111627339A (en) * | 2020-06-29 | 2020-09-04 | 武汉天马微电子有限公司 | Display panel and display device |
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| US20080055536A1 (en) * | 2005-04-25 | 2008-03-06 | Asahi Glass Co., Ltd. | Imaging lens |
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