CN101806967A - Adjustable fresnel lens - Google Patents
Adjustable fresnel lens Download PDFInfo
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- CN101806967A CN101806967A CN 201010170988 CN201010170988A CN101806967A CN 101806967 A CN101806967 A CN 101806967A CN 201010170988 CN201010170988 CN 201010170988 CN 201010170988 A CN201010170988 A CN 201010170988A CN 101806967 A CN101806967 A CN 101806967A
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Abstract
The invention relates to an adjustable Fresnel lens, which is suitable to transmit polarized light. The adjustable Fresnel lens comprises a Fresnel lens part and an optical material layer, wherein the Fresnel lens part has a light entering surface and a light leaving surface and has a double refraction property; the polarized light enters the Fresnel lens part from the light entering surface and leaves the Fresnel lens part from the light leaving surface; the polarized light refractive index of the Fresnel lens part can be adjusted by an electric field; and the optical material layer is configured on the light leaving surface of the Fresnel lens part and has a single refractive index nx.
Description
Technical field
The present invention relates to a kind of Fresnel lens (Fresnel lens), and be particularly related to the Fresnel lens of a kind of adjustable variant electric (switchable).
Background technology
Fresnel lens, claim Fresnel lens again, it has kept the curved surface and the radian of conventional lenses, and utilizes the differential principle to make the slim lens that effect is equivalent to the traditional thick glass lens, so can save lens material, and then make and when making large-scale lens, can win victory so that volume is frivolous.
Fresnel lens is to be applied to beacon, also at present being applied on the display device the earliest.Generally speaking, in the demonstration field, Fresnel lens can be used for amplifying the display frame of display screen, during the large-scale panel that particularly is applied to be slapped together by a plurality of panel, by the optics modification effect of Fresnel lens, the joint gap between panel more can not discovered by human eye.Yet, use Fresnel lens can reduce the quality of display frame and the visual angle of restriction display, whether therefore, will use Fresnel lens to reach specific optical effect is one of choice of often facing of deviser.
Summary of the invention
The invention provides a kind of adjustable Fresnel lens, whether it can will be unlocked according to the demand decision.
The present invention proposes a kind of adjustable Fresnel lens, and it is suitable for allowing a polarized light pass through.Adjustable Fresnel lens comprises a Fresnel lens part and an optical material layer.Fresnel lens part has an incidence surface and an exiting surface.Fresnel lens part has birefringence.Polarized light enters Fresnel lens part by incidence surface, and leaves Fresnel lens part from exiting surface.Fresnel lens part is suitable for coming modulation by an electric field to polarized light refractive index.Optical material layer is disposed on the exiting surface of Fresnel lens part, and wherein optical material layer has single refractive index
x
In one embodiment of this invention, the material of above-mentioned Fresnel lens part comprises a pair of refraction liquid crystal.
In one embodiment of this invention, above-mentioned birefringence liquid crystal comprises an eurymeric liquid crystal.The eurymeric liquid crystal has a major axis refractive index n
eWith a minor axis refractive index n
o, and the major axis refractive index n
eGreater than the minor axis refractive index n
oFor example, above-mentioned minor axis refractive index n
o＜single refractive index
x＜major axis refractive index n
e
In one embodiment of this invention, above-mentioned single refractive index
xEqual the minor axis refractive index n in fact
oOr major axis refractive index n
e
In one embodiment of this invention, above-mentioned birefringence liquid crystal comprises a negative type liquid crystal.Negative type liquid crystal has a major axis refractive index n
eWith a minor axis refractive index n
o, and the major axis refractive index n
eLess than the minor axis refractive index n
o
In one embodiment of this invention, above-mentioned major axis refractive index n
e＜single refractive index
x＜minor axis refractive index n
oFor example, above-mentioned single refractive index
xEqual the minor axis refractive index n in fact
oOr major axis refractive index n
e
In one embodiment of this invention, above-mentioned adjustable Fresnel lens also comprises two electrode layers.Fresnel lens part and optical material layer are disposed between two electrode layers, and Fresnel lens part is suitable for coming modulation by two electric fields that electrode layer provided to polarized light refractive index.
In one embodiment of this invention, above-mentioned optical material layer has a composition surface and a top surface.Composition surface engages with the exiting surface of Fresnel lens part, and top surface is a plane.
In addition, the present invention proposes another kind of adjustable Fresnel lens, and it is suitable for allowing a light pass through.Adjustable Fresnel lens comprises an adjustable variant electric polarization unit, a Fresnel lens part and an optical material layer.The adjustable variant electric polarization unit is suitable for converting light to a polarized light, wherein the polarization direction of adjustable variant electric polarization unit decision polarized light.Fresnel lens part has an incidence surface and an exiting surface, and wherein Fresnel lens part has birefringence.Polarized light enters Fresnel lens part by incidence surface, and leaves Fresnel lens part from exiting surface.The adjustable variant electric polarization unit is suitable for providing the polarized light of different polarization direction, so that Fresnel lens part is to the change of polarized light refractive index.Optical material layer is disposed on the exiting surface of Fresnel lens part, and wherein optical material layer has single refractive index
x
In one embodiment of this invention, above-mentioned adjustable variant electric polarization unit comprises liquid crystal born of the same parents.
Based on above-mentioned, because aforesaid adjustable Fresnel lens can change Fresnel lens part to polarized light refractive index by electric field or adjustable variant electric polarization unit, so can whether adjustable Fresnel lens will be opened according to the design requirement decision.
For above-mentioned feature and advantage of the present invention can be become apparent, below with reference to embodiment, and conjunction with figs. is elaborated as follows.
Description of drawings
Figure 1A is the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of first embodiment of the invention.
Figure 1B is another diagrammatic cross-section of the adjustable Fresnel lens and the display panel of first embodiment of the invention.
Fig. 1 C is the enlarged diagram of birefringence liquid crystal.
Fig. 2 A is the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of second embodiment of the invention.
Fig. 2 B is another diagrammatic cross-section of the adjustable Fresnel lens and the display panel of second embodiment of the invention.
Fig. 3 A is the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of third embodiment of the invention.
Fig. 3 B is another diagrammatic cross-section of the adjustable Fresnel lens and the display panel of third embodiment of the invention.
Fig. 4 A is the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of fourth embodiment of the invention.
Fig. 4 B is another diagrammatic cross-section of the adjustable Fresnel lens and the display panel of fourth embodiment of the invention.
Wherein, description of reference numerals is as follows:
100,300,400,600: Fresnel lens
110,310,420,620: Fresnel lens part
112,312,412a, 422,612a, 622: birefringence liquid crystal
120,320,430,630: optical material layer
130,230: electrode layer
200,500: display panel
410,610: the adjustable variant electric polarization unit
412,612: the liquid crystal born of the same parents
D1: major axis
D2: minor axis
L1, L3: polarized light
L2: light
S1: incidence surface
S2: exiting surface
S3: composition surface
S4: top surface
n
e: the major axis refractive index
n
o: the minor axis refractive index
n
x: single refractive index
Embodiment
[first embodiment]
Figure 1A and Figure 1B are the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of first embodiment of the invention.Figure 1A and Figure 1B be respectively adjustable Fresnel lens before being applied in electric field with afterwards diagrammatic cross-section.Please refer to Figure 1A, the adjustable Fresnel lens 100 of present embodiment is suitable for allowing a polarized light (for example being polarized light L1) pass through, and Fresnel lens 100 comprises Fresnel lens part (Fresnel lens part) 110 and optical material layer 120.In the present embodiment, polarized light L1 for example is the polarized light by display panel 200, and display panel 200 for example is a display panels.
Shown in Figure 1A, Fresnel lens part 110 has an incidence surface S1 and an exiting surface S2.In addition, Fresnel lens part 110 has birefringence (birefringence), and polarized light L1 enters Fresnel lens part 110 by incidence surface S1, and leaves Fresnel lens part 110 from exiting surface S2.In the present embodiment, the material of Fresnel lens part 110 is a birefringence liquid crystal 112.
Fig. 1 C is the enlarged diagram of birefringence liquid crystal.Shown in Fig. 1 C, birefringence liquid crystal 112 has a major axis d1 and a minor axis d2 respectively, and when light was parallel with major axis d1 by birefringence liquid crystal 112 and its polarization direction, 112 pairs of ray refraction rates of birefringence liquid crystal were defined as a major axis refractive index n
e, and when light was parallel with minor axis d2 by birefringence liquid crystal 112 and its polarization direction, 112 pairs of ray refraction rates of birefringence liquid crystal were defined as a minor axis refractive index n
oIn the present embodiment, birefringence liquid crystal 112 for example is an eurymeric liquid crystal, that is to say, and in Figure 1A, the major axis refractive index n of birefringence liquid crystal 112
eGreater than the minor axis refractive index n
oTherefore, when applying electric field when birefringence liquid crystal 112 (eurymeric liquid crystal), the major axis d1 of birefringence liquid crystal 112 can be parallel to the direction of electric field, shown in Figure 1B.
Please continue with reference to Figure 1A, optical material layer 120 is disposed on the exiting surface S2 of Fresnel lens part 110, and optical material layer 120 has single refractive index
xIn addition, in the present embodiment, single refractive index
xEqual the minor axis refractive index n of birefringence liquid crystal 112 in fact
oIn addition, shown in Figure 1A, optical material layer 120 has a composition surface S3 and a top surface S4.Composition surface S3 engages with the exiting surface S2 of Fresnel lens part 110, and top surface S4 for example is a plane.In the present embodiment, optical material layer 120 for example is to utilize pressing mold (stamper) to be made in the mode of turning over mould (replica), and Fresnel lens part 110 then for example is by birefringence liquid crystal 112 is injected by forming in the formed irregular cavity of composition surface S3.
In addition, the adjustable Fresnel lens 100 of present embodiment also comprises two electrode layers 130.In the present embodiment, the material of two electrode layers 130 for example be indium tin oxide (Indium Tin Oxide, ITO), indium-zinc oxide (Indium Zinc Oxide, IZO) or other printing opacity conductive material.Shown in Figure 1A, Fresnel lens part 110 and optical material layer 120 all are disposed between two electrode layers 130, and the refractive index of 110 couples of polarized light L1 of Fresnel lens part is suitable for coming modulation by the electric field that two electrode layers 130 are provided.
For instance, please refer to Figure 1A, when making electric field between two electrode layers 130 equal 0 (being E=0) when being not applied to voltage between two electrode layers 130, the major axis d1 direction (referring to Fig. 1 C) of the birefringence liquid crystal 112 in the Fresnel lens part 110 (for example being the eurymeric liquid crystal) is the direction of vertical paper and parallel with the polarization direction of polarized light L1.In other words, birefringence liquid crystal 112 minor axis d2 directions are vertical with the polarization direction of polarized light L1, and therefore when polarized light L1 passed through birefringence liquid crystal 112, the equivalent refractive index of birefringence liquid crystal 112 was the major axis refractive index n
eWhen polarized light L1 leaves when going forward side by side into optics material layer 120 from the exiting surface S2 of Fresnel lens part 110, because the refractive index of the optical material layer 120 of present embodiment is n
o, it is different from the equivalent refractive index n of Fresnel lens part 110
e(for polarized light L1) is so polarized light L1 can be at the interface generation refraction effect of Fresnel lens part 110 with optical material layer 120.In other words, in the present embodiment, when the electric field between two electrode layers 130 equaled 0, adjustable Fresnel lens 100 was in opening, and the adjustable Fresnel lens 100 of this moment has the function of similar conventional lenses (convex lens, concavees lens).In the present embodiment, be in the image frame of adjustable Fresnel lens 100 panels 200 capable of enlarged displaying of opening.Thus, when needs are combined into a plurality of small size display panels 200 single large-scale panel, just can pass through the show image of adjustable Fresnel lens 100 unlatchings, and then the joint gap between panel more can not discovered by human eye with amplification display panel 200.
Figure 1B is the diagrammatic cross-section of adjustable Fresnel lens after being applied in electric field.Shown in Figure 1B, when making 130 of two electrode layers produce electric field E when applying a voltage to two electrode layers 130, the major axis d1 direction of the birefringence liquid crystal 112 of Fresnel lens part 110 (for example being the eurymeric liquid crystal) can be parallel to electric field E direction and vertical with the polarization direction of polarized light L1.In other words, birefringence liquid crystal 112 minor axis d2 directions are parallel with the polarization direct of travel of polarized light L1, and therefore when polarized light L1 passed through birefringence liquid crystal 112, the equivalent refractive index of birefringence liquid crystal 112 was the minor axis refractive index n
oWhen polarized light L1 leaves when going forward side by side into optics material layer 120 from the exiting surface S2 of Fresnel lens part 110, because the refractive index of the optical material layer 120 of present embodiment is n
o, it equals the refractive index n that polarized light L1 is seen in Fresnel lens part 110
oSo refraction effect can not take place at the interface of Fresnel lens part 110 and optical material layer 120 in polarized light L1, but directly penetrates Fresnel lens part 110 and optical material layer 120.In other words, in the present embodiment, when two electrode layers 130 provided electric field to adjustable Fresnel lens 100, adjustable Fresnel lens 100 was in closing state, so can not influence image frame.
What deserves to be mentioned is, in the present embodiment, though birefringence liquid crystal 112 is the single refractive index of eurymeric liquid crystal and optical material layer 120
xEqual the minor axis refractive index n of birefringence liquid crystal 112 in fact
oYet, in other embodiments, single refractive index
xAlso can be between the minor axis refractive index n
oWith the major axis refractive index n
eBetween, that is, and the minor axis refractive index n
o＜single refractive index
x＜major axis refractive index n
eIn the case, the deviser equally also can be according to single refractive index
xAdjust electric field level, and then the refractive index of 110 couples of polarized light L1 of modulation Fresnel lens part.Thus, can utilize the variation of electric field to open or close Fresnel lens 100 equally,, not give unnecessary details so do not add at this because institute's application principle is identical with foregoing example.
On the other hand, in other embodiments, birefringence liquid crystal 112 also can be a negative type liquid crystal, wherein the major axis refractive index n of negative type liquid crystal
eLess than the minor axis refractive index n
oIn other words, when applying electric field in the two ends of negative type liquid crystal, the minor axis d2 of negative type liquid crystal (referring to Fig. 1 C) can arrange and forms state as Figure 1A along the direction of electric field.That is, the major axis d1 direction of negative type liquid crystal is having the situation that applies electric field parallel with the polarization direction of polarized light L1, so the equivalent refractive index of negative type liquid crystal is the major axis refractive index n
eHence one can see that, and the birefringence liquid crystal 112 in Fresnel lens part 110 is a negative type liquid crystal, and two electrode layers 130 are when providing electric field to Fresnel lens part 110 again, and adjustable Fresnel lens 100 is in the state of unlatching.
Relatively, when not applying electric field in the two ends of negative type liquid crystal, the minor axis d2 of negative type liquid crystal can be perpendicular to the direction of paper, shown in Figure 1B.That is, the minor axis d2 direction of negative type liquid crystal is identical with the polarization direction of polarized light L1 under the situation that does not apply electric field, so the equivalent refractive index of negative type liquid crystal is the minor axis refractive index n
oHence one can see that, and the birefringence liquid crystal 112 in Fresnel lens part 110 is a negative type liquid crystal, and two electrode layers 130 are not when providing electric field to Fresnel lens part 110, and adjustable Fresnel lens 100 is in closing state.
In other embodiments, birefringence liquid crystal 112 also can be negative type liquid crystal, and the single refractive index of optical material layer 120
xBe between the major axis refractive index n
eWith the minor axis refractive index n
oBetween, that is, and the major axis refractive index n
e＜single refractive index
x＜minor axis refractive index n
oIn the case, the deviser equally also can be according to single refractive index
xAdjust electric field level, and then the refractive index of 110 couples of polarized light L1 of modulation Fresnel lens part.Thus, can utilize the variation of electric field to open or close Fresnel lens 100 equally,, not give unnecessary details so do not add at this because institute's application principle is identical with foregoing example.
[second embodiment]
Fig. 2 A and Fig. 2 B are the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of second embodiment of the invention, wherein Fig. 2 A and Fig. 2 B be respectively adjustable Fresnel lens before being applied in electric field with afterwards diagrammatic cross-section.Please refer to Fig. 2 A, the adjustable Fresnel lens 300 of present embodiment is similar with the adjustable Fresnel lens 100 of Figure 1A, but both main difference parts are: the single refractive index that the optical material layer 320 of adjustable Fresnel lens 300 is had
xEqual the major axis refractive index n of birefringence liquid crystal 312 in fact
e
In the present embodiment, birefringence liquid crystal 312 for example is an eurymeric liquid crystal, that is to say, and in Fig. 2 A, the major axis refractive index n of birefringence liquid crystal 312
eGreater than the minor axis refractive index n
oTherefore, when applying electric field in birefringence liquid crystal 312, the major axis d1 of eurymeric liquid crystal is parallel with the direction of electric field, shown in Fig. 2 B.
Specifically, please refer to Fig. 2 A, when making electric field between two electrode layers 130 equal 0 (being E=0) when being not applied to voltage between two electrode layers 130, the major axis d1 direction of birefringence liquid crystal 312 in the Fresnel lens part 310 (for example being the eurymeric liquid crystal) is parallel with the polarization direction of polarized light L1, therefore when polarized light L1 passed through birefringence liquid crystal 312, the equivalent refractive index of birefringence liquid crystal 312 was the major axis refractive index n
eBecause the equivalent refractive index n of birefringence liquid crystal 312
eRefractive index n with optical material layer 320
eIdentical, so polarized light L1 can be at the interface generation refraction effect of Fresnel lens part 310 with optical material layer 320.That is, in the present embodiment, when the electric field between two electrode layers 130 equaled 0, adjustable Fresnel lens 300 was in closing state, so can not influence image frame.
Fig. 2 B is the diagrammatic cross-section of adjustable Fresnel lens after being applied in electric field.Shown in Fig. 2 B, when making 130 of two electrode layers produce electric field E when applying a voltage to two electrode layers 130, the major axis d1 direction of the birefringence liquid crystal 312 of Fresnel lens part 310 (for example being the eurymeric liquid crystal) can be parallel to electric field E direction and vertical with the polarization direction of polarized light L1.In other words, the minor axis d2 direction of birefringence liquid crystal 312 is parallel with the polarization direction of polarized light L1, and therefore when polarized light L1 passed through birefringence liquid crystal 312, the equivalent refractive index of birefringence liquid crystal 312 was the minor axis refractive index n
oBecause the refractive index n of optical material layer 320
eWith the equivalent refractive index of birefringence liquid crystal 312 be the minor axis refractive index n
oDifference is so polarized light L1 can be at the interface generation refraction effect of Fresnel lens part 310 with optical material layer 320.That is, in the present embodiment, when two electrode layers 130 provided electric field to adjustable Fresnel lens 300, adjustable Fresnel lens 300 was in opening.
What deserves to be mentioned is, in the present embodiment, though birefringence liquid crystal 312 is the single refractive index of eurymeric liquid crystal and optical material layer 320
xEqual the major axis refractive index n of birefringence liquid crystal 312 in fact
eYet, in other embodiments, single refractive index
xAlso can be between the minor axis refractive index n
oWith the major axis refractive index n
eBetween, that is, and the minor axis refractive index n
o＜single refractive index
x＜major axis refractive index n
eIn the case, the deviser equally also can be according to single refractive index
xAdjust electric field level, and then the refractive index of 310 couples of polarized light L1 of modulation Fresnel lens part.Thus, can utilize electric field to come switch Fresnel lens 300 equally,, not give unnecessary details so do not add at this because institute's application principle is identical with foregoing example.
In addition, in the present embodiment, though birefringence liquid crystal 312 is the eurymeric liquid crystal, yet in other embodiments, birefringence liquid crystal 312 also can be a negative type liquid crystal, wherein the major axis refractive index n of negative type liquid crystal
eLess than the minor axis refractive index n
oIn other words, when applying electric field in the two ends of negative type liquid crystal, the minor axis d2 of negative type liquid crystal is parallel to the direction of electric field, shown in Fig. 2 A.That is, the major axis d1 of negative type liquid crystal have under the situation that applies electric field parallel with the polarization direction of polarized light L1, so the equivalent refractive index of negative type liquid crystal is the major axis refractive index n
eHence one can see that, and the birefringence liquid crystal 312 in Fresnel lens part 310 is a negative type liquid crystal, and two electrode layers 130 are when providing electric field to Fresnel lens part 310 again, and adjustable Fresnel lens 300 is in closed condition.
Relatively, when not applying electric field in the two ends of negative type liquid crystal, the direction that the minor axis d2 of negative type liquid crystal can vertical paper is shown in Fig. 2 B.That is, the direction of the minor axis d2 of negative type liquid crystal is parallel with the polarization direction of polarized light L1 under the situation that does not apply electric field.Therefore, when polarized light L1 passed through negative type liquid crystal, the equivalent refractive index of negative type liquid crystal was the minor axis refractive index n
oHence one can see that, and the birefringence liquid crystal 312 in Fresnel lens part 310 is a negative type liquid crystal, and two electrode layers 130 are not when providing electric field to Fresnel lens part 310, and adjustable Fresnel lens 300 is in the state of unlatching.
On the other hand, in other embodiments, birefringence liquid crystal 312 also can be the single refractive index of negative type liquid crystal and optical material layer 320
xFor example be between the major axis refractive index n
eWith the minor axis refractive index n
oBetween.That is major axis refractive index n,
e＜single refractive index
x＜minor axis refractive index n
oIn the case, the deviser equally also can be according to single refractive index
xAdjust electric field level, and then the refractive index of 310 couples of polarized light L1 of modulation Fresnel lens part.Thus, can utilize the variation of electric field to open or close Fresnel lens 300 equally,, not give unnecessary details so do not add at this because institute's application principle is identical with foregoing example.
[the 3rd embodiment]
Fig. 3 A and Fig. 3 B are the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of third embodiment of the invention, and wherein Fig. 3 A and Fig. 3 B are respectively adjustable Fresnel lens and have or not the diagrammatic cross-section that applies electric field.Please refer to Fig. 3 A, the adjustable Fresnel lens 400 of present embodiment is suitable for allowing a light L2 pass through, and adjustable Fresnel lens 400 comprises adjustable variant electric polarization unit 410, Fresnel lens part 420 and optical material layer 430.In the present embodiment, light L2 for example is the light by display panel 500, and display panel 500 for example is a display panels.
As shown in Figure 3A, adjustable variant electric polarization unit 410 is suitable for converting light L2 to a polarized light L3.The polarization direction of adjustable variant electric polarization unit 410 decision polarized light L3, wherein the polarization direction of polarized light L3 for example is the direction of vertical paper or the direction of parallel paper.In addition, Fresnel lens part 420 has an incidence surface S1 and an exiting surface S2.In addition, Fresnel lens part 420 has birefringence, and polarized light L3 enters Fresnel lens part 420 by incidence surface S1, and leaves Fresnel lens part 420 from exiting surface S2.
In the present embodiment, the material of Fresnel lens part 420 comprises a pair of refraction liquid crystal 422, and wherein birefringence liquid crystal 422 for example is an eurymeric liquid crystal or a negative type liquid crystal.That is to say, in Fig. 3 A, the major axis refractive index n of birefringence liquid crystal 422
eBe greater than or less than the minor axis refractive index n
oIn addition, shown in Fig. 3 A and 3B, the direction of the major axis d1 of the birefringence liquid crystal 422 of present embodiment is to be fixed on the direction vertical with the polarization direction of polarized light L3, and the arrangement of birefringence liquid crystal 422 is fixed.
Please continue the A with reference to Fig. 3, optical material layer 430 is disposed on the exiting surface S2 of Fresnel lens part 420, and optical material layer 430 has single refractive index
xIn addition, in the present embodiment, single refractive index
xEqual the minor axis refractive index n of birefringence liquid crystal 422 in fact
oIn addition, as shown in Figure 3A, optical material layer 430 has a composition surface S3 and a top surface S4.Composition surface S3 engages with the exiting surface S2 of Fresnel lens part 420, and top surface S4 for example is a plane.In the present embodiment, optical material layer 430 for example is to utilize pressing mold to be made in the mode of turning over mould, and Fresnel lens part 420 then for example is by birefringence liquid crystal 422 is injected by forming in the formed irregular cavity of composition surface S3.
In addition, the adjustable variant electric polarization unit 410 of present embodiment comprises liquid crystal born of the same parents (liquid crystalcell) 412.In addition, two electrode layers 230 also are disposed at relative two surfaces of the liquid crystal born of the same parents 412 respectively.Wherein the material of electrode layer 230 for example is printing opacity conductive materials such as indium tin oxide or indium-zinc oxide.As shown in Figure 3A, adjustable variant electric polarization unit 410 is suitable for providing the polarized light L3 of different polarization direction, so that the refraction index changing of 420 couples of polarized light L3 of Fresnel lens part.
For instance, please refer to Fig. 3 A, when voltage puts on two electrode layers 230 and makes that two electrode layers 230 provide electric field to adjustable variant electric polarization unit 410, the major axis d1 of birefringence liquid crystal 412a (for example being the eurymeric liquid crystal) in the liquid crystal born of the same parents 412 can arrange along direction of an electric field (direction of parallel paper just), so the polarization direction of polarized light L3 is identical with the polarization direction of light L2, can't change.For instance, when the polarization direction of light L2 was the direction of vertical paper, the polarization direction of the polarized light L3 by adjustable variant electric polarization unit 410 also was the direction of vertical paper.Thus, when polarized light L3 entered Fresnel lens part 420, the equivalent refractive index of birefringence liquid crystal 422 was the minor axis refractive index n
oBecause the refractive index n of optical material layer 430
oEquivalent refractive index n with birefringence liquid crystal 422
oIdentical, so polarized light L3 can refraction effect not take place at the interface of Fresnel lens part 420 and optical material layer 430, but directly penetrate Fresnel lens part 420 and optical material layer 430.In other words, in the present embodiment, when two electrode layers 230 provided electric field to adjustable variant electric polarization unit 410, adjustable Fresnel lens 400 was to be in closed condition, so can not influence image frame.
Fig. 3 B is the diagrammatic cross-section of adjustable Fresnel lens when not applying electric field.Shown in Fig. 3 B, when making electric field between two electrode layers 230 equal 0 (being E=0) when being not applied to voltage between two electrode layers 230, the birefringence liquid crystal 412a among the liquid crystal born of the same parents 412 can change the polarization direction of light L2.For instance, when the polarization direction of light L2 is the direction of vertical paper, the direction that the polarization direction of the polarized light L3 by adjustable variant electric polarization unit 410 can parallel paper.Thus, when polarized light L3 entered Fresnel lens part 420, the equivalent refractive index of birefringence liquid crystal 422 was the major axis refractive index n
eBecause the refractive index n of optical material layer 430
oEquivalent refractive index n with birefringence liquid crystal 422
eDifference is so polarized light L3 can be at the interface generation refraction effect of Fresnel lens part 420 with optical material layer 430.In other words, in the present embodiment, when two electrode layers 230 provided electric field to adjustable variant electric polarization unit 410, adjustable Fresnel lens 400 was in opening, and the adjustable Fresnel lens 400 of this moment has the function of similar conventional lenses (convex lens, concavees lens).
In the present embodiment, be in the image frame of adjustable Fresnel lens 400 panels 500 capable of enlarged displaying of opening.Thus, when needs are combined into a plurality of small size display panels 500 single large-scale panel, just can provide adjustable Fresnel lens 400 is opened amplifying show image, and the joint gap between panel more can not discovered by human eye.
What deserves to be mentioned is that in the present embodiment, birefringence liquid crystal 422 for example is the eurymeric liquid crystal, and the single refractive index of optical material layer 430
xEqual the major axis refractive index n of birefringence liquid crystal 422 in fact
eYet, in other embodiments, single refractive index
xAlso can be between the minor axis refractive index n
oWith the major axis refractive index n
eBetween, that is, and the minor axis refractive index n
o＜single refractive index
x＜major axis refractive index n
e
In addition, in other embodiments, birefringence liquid crystal 422 also can be a negative type liquid crystal, wherein the major axis refractive index n of negative type liquid crystal
eLess than the minor axis refractive index n
oIn addition, the single refractive index of optical material layer 430
xFor example between the major axis refractive index n
eWith the minor axis refractive index n
oBetween, that is, and the major axis refractive index n
e＜single refractive index
x＜minor axis refractive index n
oFollowing in above-mentioned situation, the deviser equally also can be according to single refractive index
xDesign the arrangement of birefringence liquid crystal 422, and provide the polarized light of different polarization direction, so that the refraction index changing of 420 couples of polarized light L3 of Fresnel lens part by adjustable variant electric polarization unit 410 in Fresnel lens part 420.Thus, can utilize the variation of electric field to open or close Fresnel lens 400 equally,, not give unnecessary details so do not add at this because institute's application principle is identical with foregoing example.
In addition, though the birefringence liquid crystal 412a of present embodiment is in the polarization direction that does not have to change under the situation of added electric field light L2, yet in other embodiments, birefringence liquid crystal 412a also can have the polarization direction that changes light L2 under the situation that applies electric field.
[the 4th embodiment]
Fig. 4 A and Fig. 4 B are the diagrammatic cross-section of the adjustable Fresnel lens and the display panel of fourth embodiment of the invention, and wherein Fig. 4 A and Fig. 4 B are respectively adjustable Fresnel lens and have or not the diagrammatic cross-section that applies electric field.Please refer to Fig. 4 A, the adjustable Fresnel lens 600 of present embodiment is similar with the adjustable Fresnel lens 400 of Fig. 3 A, but both main difference parts are: the single refractive index that the optical material layer 630 of adjustable Fresnel lens 600 is had
xEqual the major axis refractive index n of birefringence liquid crystal 622 in fact
e
Shown in Fig. 4 A, adjustable variant electric polarization unit 610 is suitable for providing the polarized light L3 of different polarization direction, so that the refraction index changing of 620 couples of polarized light L3 of Fresnel lens part.For instance, please refer to Fig. 4 A, put on two electrode layers 230 and when making that 230 of two electrode layers produce electric field E as voltage, the major axis of birefringence liquid crystal 612a (for example being the eurymeric liquid crystal) in the liquid crystal born of the same parents 612 can be arranged along direction of an electric field (direction of parallel paper just), so the polarization direction of polarized light L3 is identical with the polarization direction of light L2, can't change.Thus, when polarized light L3 entered Fresnel lens part 620, the equivalent refractive index of birefringence liquid crystal 622 was the minor axis refractive index n
oBecause the refractive index n of optical material layer 630
eEquivalent refractive index n with birefringence liquid crystal 622
oDifference is so polarized light L3 can be at the interface generation refraction effect of Fresnel lens part 620 with optical material layer 630.That is, in the present embodiment, when two electrode layers 230 provided electric field to adjustable variant electric polarization unit 610, adjustable Fresnel lens 600 was in opening.
Fig. 4 B is the diagrammatic cross-section of adjustable Fresnel lens before applying electric field.Shown in Fig. 4 B, when the electric field of 230 of two electrode layers equaled 0 (being E=0), the birefringence liquid crystal 612a in the liquid crystal born of the same parents 612 can change the polarization direction of light L2.Thus, when polarized light L3 entered Fresnel lens part 620, the equivalent refractive index of birefringence liquid crystal 622 was the major axis refractive index n
eBecause the refractive index n of optical material layer 630
eEquivalent refractive index n with birefringence liquid crystal 622
eIdentical, so polarized light L3 can refraction effect not take place at the interface of Fresnel lens part 620 and optical material layer 630, but directly penetrate Fresnel lens part 620 and optical material layer 630.That is, in the present embodiment, when two electrode layers 230 provide electric field to adjustable variant electric polarization unit 610, adjustable Fresnel lens 600 be in closed condition, so can not influence image frame.
What deserves to be mentioned is that in the present embodiment, birefringence liquid crystal 622 for example is the eurymeric liquid crystal, and the single refractive index of optical material layer 630
xEqual the major axis refractive index n of birefringence liquid crystal 622 in fact
eYet, in other embodiments, single refractive index
xAlso can be between the minor axis refractive index n
oWith the major axis refractive index n
eBetween, that is, and the minor axis refractive index n
o＜single refractive index
x＜major axis refractive index n
e
In addition, in other embodiments, birefringence liquid crystal 622 also can be a negative type liquid crystal, wherein the major axis refractive index n of negative type liquid crystal
eLess than the minor axis refractive index n
oIn addition, the single refractive index of optical material layer 630
xFor example between the major axis refractive index n
eWith the minor axis refractive index n
oBetween, that is, and the major axis refractive index n
e＜single refractive index
x＜minor axis refractive index n
oIn these cases, the deviser equally also can be according to single refractive index
xDesign the arrangement of birefringence liquid crystal 622, and provide the polarized light of different polarization direction, so that the refraction index changing of 620 couples of polarized light L3 of Fresnel lens part by adjustable variant electric polarization unit 610 in Fresnel lens part 620.Thus, can utilize electric field to come switch Fresnel lens 600 equally,, not give unnecessary details so do not add at this because institute's application principle is identical with foregoing example.
In addition, though the birefringence liquid crystal 612a of present embodiment is the polarization direction that changes light L2 under the situation of added electric field not, yet in other embodiments, birefringence liquid crystal 612a also can apply the polarization direction that changes light L2 under the situation of electric field.
In sum, because the adjustable Fresnel lens of embodiments of the invention is suitable for changing Fresnel lens part to polarized light refractive index by the variation or the adjustable variant electric polarization unit of electric field, so can adjustable Fresnel lens will be opened or be closed according to the design requirement decision.
Though the present invention discloses as above with embodiment; yet it is not in order to limit the present invention; any the technical staff in the technical field; without departing from the spirit and scope of the present invention; can carry out suitable variation and modification, so protection scope of the present invention is as the criterion when looking appended claims institute restricted portion.
Claims (20)
1. an adjustable Fresnel lens is suitable for allowing a polarized light pass through, and this adjustable Fresnel lens comprises:
One Fresnel lens part, have an incidence surface and an exiting surface, wherein this Fresnel lens part has birefringence, this polarized light enters this Fresnel lens part by this incidence surface, and leave this Fresnel lens part from this exiting surface, and this Fresnel lens part is suitable for coming modulation by an electric field to this polarized light refractive index; And
One optical material layer is disposed on this exiting surface of this Fresnel lens part, and wherein this optical material layer has single refractive index
x
2. adjustable Fresnel lens as claimed in claim 1, wherein the material of this Fresnel lens part comprises birefringence liquid crystal.
3. adjustable Fresnel lens as claimed in claim 2, wherein this birefringence liquid crystal comprises the eurymeric liquid crystal, this eurymeric liquid crystal has a major axis refractive index n
eWith a minor axis refractive index n
o, and this major axis refractive index n
eGreater than this minor axis refractive index n
o
4. adjustable Fresnel lens as claimed in claim 3, wherein minor axis refractive index n
o＜single refractive index
x＜major axis refractive index n
e
5. adjustable Fresnel lens as claimed in claim 3, wherein single refractive index
xEqual the minor axis refractive index n
oOr major axis refractive index n
e
6. adjustable Fresnel lens as claimed in claim 2, wherein this birefringence liquid crystal comprises negative type liquid crystal, this negative type liquid crystal has a major axis refractive index n
eWith a minor axis refractive index n
o, and this major axis refractive index n
eLess than this minor axis refractive index n
o
7. adjustable Fresnel lens as claimed in claim 6, wherein major axis refractive index n
e＜single refractive index
x＜minor axis refractive index n
o
8. adjustable Fresnel lens as claimed in claim 6, wherein single refractive index
xEqual the minor axis refractive index n
oOr major axis refractive index n
e
9. adjustable Fresnel lens as claimed in claim 1, also comprise two electrode layers, wherein this Fresnel lens part and this optical material layer are disposed between described two electrode layers, and this Fresnel lens part is suitable for coming modulation by described two these electric fields that electrode layer provided to this polarized light refractive index.
10. adjustable Fresnel lens as claimed in claim 1, wherein this optical material layer has a composition surface and a top surface, and this composition surface engages with this exiting surface of this Fresnel lens part, and this top surface is a plane.
11. an adjustable Fresnel lens is suitable for allowing a light pass through, this adjustable Fresnel lens comprises:
One adjustable variant electric polarization unit is suitable for converting this light to a polarized light, and wherein this adjustable variant electric polarization unit determines the polarization direction of this polarized light;
One Fresnel lens part, have an incidence surface and an exiting surface, wherein this Fresnel lens part has birefringence, this polarized light enters this Fresnel lens part by this incidence surface, and leave this Fresnel lens part from this exiting surface, and this adjustable variant electric polarization unit is suitable for providing this polarized light of different polarization direction, so that this Fresnel lens part changes this polarized light refractive index; And
One optical material layer is disposed on this exiting surface of this Fresnel lens part, and wherein this optical material layer has single refractive index
x
12. adjustable Fresnel lens as claimed in claim 11, wherein the material of this Fresnel lens part comprises birefringence liquid crystal.
13. adjustable Fresnel lens as claimed in claim 12, wherein this birefringence liquid crystal comprises the eurymeric liquid crystal, and this eurymeric liquid crystal has a major axis refractive index n
eWith a minor axis refractive index n
o, and this major axis refractive index n
eGreater than this minor axis refractive index n
o
14. adjustable Fresnel lens as claimed in claim 13, wherein minor axis refractive index n
o＜single refractive index
x＜major axis refractive index n
e
15. adjustable Fresnel lens as claimed in claim 13, wherein single refractive index
xEqual the minor axis refractive index n
oOr major axis refractive index n
e
16. adjustable Fresnel lens as claimed in claim 12, wherein this birefringence liquid crystal comprises negative type liquid crystal, and this negative type liquid crystal has a major axis refractive index n
eWith a minor axis refractive index n
o, and this major axis refractive index n
eLess than this minor axis refractive index n
o
17. adjustable Fresnel lens as claimed in claim 16, wherein major axis refractive index n
e＜single refractive index
x＜minor axis refractive index n
o
18. adjustable Fresnel lens as claimed in claim 16, wherein single refractive index
xEqual the minor axis refractive index n
oOr major axis refractive index n
e
19. adjustable Fresnel lens as claimed in claim 11, wherein this optical material layer has a composition surface and a top surface, and this composition surface engages with this exiting surface of this Fresnel lens part, and this top surface is a plane.
20. adjustable Fresnel lens as claimed in claim 11, wherein this adjustable variant electric polarization unit comprises the liquid crystal born of the same parents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101709888A CN101806967B (en) | 2010-04-30 | 2010-04-30 | Adjustable fresnel lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101709888A CN101806967B (en) | 2010-04-30 | 2010-04-30 | Adjustable fresnel lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101806967A true CN101806967A (en) | 2010-08-18 |
| CN101806967B CN101806967B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101709888A Expired - Fee Related CN101806967B (en) | 2010-04-30 | 2010-04-30 | Adjustable fresnel lens |
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| Country | Link |
|---|---|
| CN (1) | CN101806967B (en) |
Cited By (3)
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| CN104570521A (en) * | 2013-10-24 | 2015-04-29 | 三星显示有限公司 | Liquid crystal display and method of manufacturing the same |
| CN105572930A (en) * | 2016-03-23 | 2016-05-11 | 京东方科技集团股份有限公司 | Display module and display system |
| CN106226930A (en) * | 2016-09-08 | 2016-12-14 | 京东方科技集团股份有限公司 | A kind of Fresnel Lenses device |
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| US20040164927A1 (en) * | 1996-01-17 | 2004-08-26 | Nippon Telegraph And Telephone Corporation | Optical device and three-dimensional display device |
| CN1823292A (en) * | 2003-07-10 | 2006-08-23 | 奥库提有限公司 | Directional display apparatus |
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| CN104570521A (en) * | 2013-10-24 | 2015-04-29 | 三星显示有限公司 | Liquid crystal display and method of manufacturing the same |
| CN105572930A (en) * | 2016-03-23 | 2016-05-11 | 京东方科技集团股份有限公司 | Display module and display system |
| CN106226930A (en) * | 2016-09-08 | 2016-12-14 | 京东方科技集团股份有限公司 | A kind of Fresnel Lenses device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101806967B (en) | 2012-07-18 |
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