CN102109681B - Color beam splitting system - Google Patents
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- CN102109681B CN102109681B CN 200910265505 CN200910265505A CN102109681B CN 102109681 B CN102109681 B CN 102109681B CN 200910265505 CN200910265505 CN 200910265505 CN 200910265505 A CN200910265505 A CN 200910265505A CN 102109681 B CN102109681 B CN 102109681B
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Abstract
The invention discloses a color beam splitting system, which contains a highly collimated backlight source, a color separating module and a beam splitting module, wherein highly collimated backlight source provides an incident light beam; the color separating module comprises a first color separating diaphragm to split the incident light beam according to wavelength and deflecting a light path; the beam splitting module comprises at least one beam splitting diaphragm and a liquid crystal layer; and the beam splitting diaphragm is used for converging an incident beam from the color separating module and deflecting the light path of the incident beam and transmitting the beam out in the direction close to the normal of an exit plane of the highly collimated backlight source.
Description
Technical field
The present invention is relevant for a kind of system for splitting colors, espespecially a kind ofly replaces the colored filter that conventional display panels, imageing sensor and colour camera adopt, and increases the optics service efficiency, simplifies the system for splitting colors of system complexity.
Background technology
In flat-panel screens, backlight is often arranged in pairs or groups liquid crystal spatial modulator (a spatial lightmodulator) and colored filter to present the true color image.And the imageing sensor in digital camera also needs the calculation of colored filter accompanying colour difference to present the color of the original.In relatively large system, such as colour camera and back projection TV, then adopt three-plate type or double-plate water chestnut mirror group or colored filter collocation collimated light source to present the full color image.When system adopts colored filter (color filter, CF) time, because of colored filter (color filter, CF) each colored pixels can only present Red Green Blue (R, G, B) wherein single primary colors, have approximately 2/3rds incident white light energy to be absorbed, reduce the optics service efficiency, also reduced battery.In addition, the processing procedure of colored filter itself is very loaded down with trivial details, and each primary colors need use above together semiconductor gold-tinted processing procedure at least, and cost is high.
See also Fig. 1 to traditional colour camera shown in Figure 3 light splitting framework commonly used, it mainly is divided three classes, three-plate type water chestnut mirror light splitting framework as shown in Figure 1 is made of zoom lens 1, infrared fileter 2, three-plate type water chestnut mirror 3, ruddiness Charged Coupled Device (CCD) 4, green glow Charged Coupled Device 5, blue light Charged Coupled Device 6; Double-plate dichroic water chestnut mirror light splitting framework is made of zoom lens 1, infrared fileter 2, double-plate water chestnut mirror 7, red blue filter 8, red blue light Charged Coupled Device 9, green glow Charged Coupled Device 5 as shown in Figure 2; One-board colored filter framework is made of zoom lens 1, infrared fileter 2, the honorable colo(u)r filter 10 of RGB, RGB optical charge coupling assembly 11 as shown in Figure 3; Wherein two kinds of structures of Figure 1 and Figure 2 are utilized water chestnut mirror and the light splitting of interference thin film sheet, and its shortcoming is volume required large and optical module is many, and structure shown in Figure 3 then is directly to adopt the optical texture of colored filter, and shortcoming is that optical efficiency is low.
For open source literature, for example Philips company in 2008 at Journal of SID 16/8,2008, and IBM Corporation in 2002 the 339th ~ 342 page of EURODISPLAY 2002, all deliver and utilize subwavelength structure to do color separation, and the microlens array of arranging in pairs or groups focuses on each time pixel with each color beam, and replacing the function of conventional dyes formula photoresistance, but its common shortcoming that exists is:
(1) (Pitch ~ 320nm) is difficult for large-area manufacturing to subwavelength structure;
(2) light-emitting uniformity is poor;
(3) high cost.
For patent, U.S.'s patent of invention US5615024A " Color Display Devicewith Chirped Diffraction Gratings " for example, it discloses a kind of optical texture of alternative colored filter, mainly be to utilize the grating generation three primary colors separation that declines of glittering, when being applied to panel, each primary colors can a corresponding pixel (mainly being that one-level penetrates diffraction light).Because use one-level to penetrate the event of diffraction light, incident light and emergent light press from both sides a wide-angle, vertically enter liquid crystal layer for making emergent light, incident light must wide-angle enter the grating that declines that glitters.If enter the grating that declines that glitters with vertical incidence light, emergent light can only wide-angle enters liquid crystal layer will limit workability, unless other refraction assembly otherwise be not suitable for being applied in the panel construction of slimming of arranging in pairs or groups.
U.S.'s patent of invention US4807978 " Color Display Device and Method UsingHolographic Lenses " and for example, it discloses a kind of optical texture of alternative colored filter, mainly be to utilize full figure assembly mirror group to produce three primary colors to separate, when being applied to panel, each primary colors can a corresponding pixel (mainly being that one-level penetrates diffraction light).Owing to use three layers full figure assembly mirror group, so the processing procedure difficulty is high, be difficult in addition accurate contraposition between little array of refractive lenses, add noise still high (that is the cross talk between three primary colors is serious), the difficult problem that must solve when being its practical application.
For another example U.S.'s patent of invention US5764389 " Holographic Color Filters for DisplayApplications, and Operating Method ", it discloses a kind of optical texture of alternative colored filter, mainly be to utilize first one group of full figure filtering unit mirror group to produce three primary colors to separate, but recycle another group full figure filtering and deviation assembly mirror group deviation light path so that each primary colors can a corresponding pixel.Owing to use the full figure assembly mirror group of multilayer, so optical efficiency is extremely low, be difficult in addition accurate contraposition between the full figure assembly array, the difficult problem that must solve when being its practical application.
For another Taiwan new patent M249217 " image sensor ", it discloses a kind of optical texture of alternative colored filter, mainly be to utilize first one group of lens collocation water chestnut mirror to produce three primary colors to separate, but and the deviation light path so that each primary colors can corresponding pixel.Because the lens that use place on the water chestnut mirror, and the shape of water chestnut mirror size in the light field scope of whole image sensor is uneven, so, in fact can't make the difficult problem that must solve during for its practical application though optical efficiency is good.
In view of this, how can design a kind of optical module group to replace colored filter, increase the optics service efficiency, simplify system complexity, simultaneously, in the situation of keeping the height optical efficiency, can produce the three primary colors corresponding to panel pixel and vertical incidence liquid crystal layer, be the problem that correlative technology field is eager to solve.
Summary of the invention
Because problems of the prior art, the present invention proposes a kind of system for splitting colors, can replace the colored filter that conventional display panels, imageing sensor and colour camera adopt, and increases the optics service efficiency, simplifies system complexity.
For achieving the above object, the present invention proposes a kind of system for splitting colors, comprises: a high collimated backlight, a color separation module and a beam splitting module.Wherein this high collimated backlight is in order to provide an incident light.This color separation module, consisted of by one first color separation diaphragm, this the first color separation diaphragm comprises one first plane of incidence and one first exit facet, this first plane of incidence has periodically light splitting microstructure, in order to this incident light according to the wavelength light splitting, this first exit facet is provided with periodically polygon refractive power microstructure, this first exit facet is used for providing the incident light through this first plane of incidence light splitting to pass through, and the deviation light path, make through the incident light deviation of this first plane of incidence light splitting normal direction to an out-of-plane of this backlight.This beam splitting module, comprise at least one beam splitting diaphragm and a liquid crystal layer, this beam splitting diaphragm has periodic micro structure, in order to converge the incident light that comes from this color separation module, and this incident light converged to not homogeneous location of pixels in corresponding this liquid crystal layer, and be parallel to this normal direction with convergence and penetrate.
For making your juror for structure purpose of the present invention and effect further understanding and approval be arranged, hereby cooperate accompanying drawing to be described in detail as follows.
Description of drawings
Fig. 1 is traditional three-plate type water chestnut mirror light splitting configuration diagram;
Fig. 2 is traditional double-plate dichroic water chestnut mirror light splitting configuration diagram;
Fig. 3 is traditional one-board colored filter configuration diagram;
Fig. 4 is the first embodiment of the invention configuration diagram;
Fig. 5 is the second embodiment of the invention configuration diagram;
Fig. 6 is the third embodiment of the invention configuration diagram;
Fig. 7 is the fourth embodiment of the invention configuration diagram;
Fig. 8 is the fifth embodiment of the invention configuration diagram;
Fig. 9 is the sixth embodiment of the invention configuration diagram.
Wherein, Reference numeral:
The 1-zoom lens
The 2-infrared fileter
3-three-plate type water chestnut mirror
4-ruddiness Charged Coupled Device (CCD)
5-green glow Charged Coupled Device
6-blue light Charged Coupled Device
7-double-plate water chestnut mirror
The red blue filter of 8-
The red blue light Charged Coupled Device of 9-
The honorable colo(u)r filter of 10-RGB
11-RGB optical charge coupling assembly
The high collimated backlight of 20-
30,30a-color separation module
31,31a-the first color separation diaphragm
311,311a-first plane of incidence
312,312a-the first exit facet
32-the second color separation diaphragm
321-second plane of incidence
322-the second exit facet
40-beam splitting module
41-the first beam splitting diaphragm
411-the 3rd plane of incidence
412-the 3rd exit facet
The 42-liquid crystal layer
43-glue material
The 431-space
50-beam splitting module
51-the second beam splitting diaphragm
511-the 4th plane of incidence
512-the 4th exit facet
The 52-liquid crystal layer
53-the 3rd beam splitting diaphragm
531-the 5th plane of incidence
532-the 5th exit facet
54a, 54b-glue material
The 541-space
L1 ~ L8-incident light
The L9-emergent light
R, G, B-three primary colors
θ-oblique incidence angle
Embodiment
Describe the present invention for reaching the employed technological means of purpose and effect hereinafter with reference to accompanying drawing, and the cited embodiment of the following drawings only is aid illustration, in order to your juror understand, but the technological means of this case is not limited to cited accompanying drawing.
In below describing, " first ", " second ", " the 3rd " etc. are not to censure specific components or order in order to limit only in order to convenient explanation.
See also first embodiment of the invention structural representation shown in Figure 4, this system for splitting colors comprises a high collimated backlight 20, a color separation module 30 and a beam splitting module 40, this high collimated backlight 20 is in order to provide an oblique incidence light L1, the collimation scope of this incident light L1 is that the angle of divergence is lower than full width at half maximum (FWHM, Full width at half-maximum) 10 degree are in 0 ~ 50 degree with respect to its oblique incidence angle of normal direction θ of these high collimated backlight 20 out-of-planes; This color separation module 30 comprises one first color separation diaphragm 31 and one second color separation diaphragm 32, the refractive index of this first color separation diaphragm 31 and one second color separation diaphragm 32 is in 1.35 ~ 1.65 scope, this the first color separation diaphragm 31 comprises one first plane of incidence 311 and one first exit facet 312, this first plane of incidence 311 is provided with periodically light splitting microstructure, this light splitting microstructure can adopt the spectro-grating of cycle in 2 ~ 5 microns scope, this first exit facet 312 is provided with periodically refractive power microstructure, this refractive power microstructure can adopt the polygonized structure of cycle in 10 ~ 150 microns scope, the distance between the central point of adjacent two structures of described all index futures.This first plane of incidence 311 provides the original incident light L1 that comes from this high collimated backlight 20 to pass through, and with this incident light L1 according to the wavelength light splitting, in this first color separation diaphragm 31 interior formation second incident light L2 (that is diffraction light), this first exit facet 312 provides this second incident light L2 to pass through, and this first color separation diaphragm 31 of ejaculation after its light path of deviation, to form incident light L3 three times, the purpose of this first exit facet 312 is so that this second incident light L2 is partial to the normal direction of this first color separation diaphragm 31, that is deviation is to the normal direction of the out-of-plane of this backlight 20; This second color separation diaphragm 32 comprises one second plane of incidence 321 and one second exit facet 322, this second plane of incidence 321 is a plane, this second exit facet 322 is provided with periodically refractive power microstructure, this periodicity refractive power microstructure can adopt the polygonized structure of cycle in 10 ~ 150 microns scope, this second plane of incidence 321 provides these three incident light L3 to pass through, and in four incident light L4 of these the second color separation diaphragm 32 interior formation, this second exit facet 322 provides these four incident light L4 to pass through, and this second color separation diaphragm 32 of ejaculation after its light path of deviation, that is deviation is to the normal direction ejaculation of the out-of-plane of this backlight 20, to form incident light L5 five times, the purpose of this second exit facet 322 is so that these four incident light L4 are partial to the normal direction of this second color separation diaphragm 32, in other words, this incident light L1 is through this first exit facet 312, these the second exit facet 322 twice deviations, with the normal direction of this color separation module 30 of certain deflection, namely to the normal direction deviation of these high collimated backlight 20 out-of-planes.
What say is, the selection of the refractive index of this first color separation diaphragm 31 and one second color separation diaphragm 32 does not limit, the refractive index that no matter is the first color separation diaphragm 31 be greater than, equal or less than the refractive index of the second color separation diaphragm 32, all can be by the design of the structure on this first color separation diaphragm 31 and the one second color separation diaphragm 32, reach the adjustment of light path direct of travel, make light can be partial to the normal direction of this color separation module 30, that is to the normal direction deviation of these high collimated backlight 20 out-of-planes.
This beam splitting module 40 comprises one first beam splitting diaphragm 41 and a liquid crystal layer 42, this the first beam splitting diaphragm 41 has periodic micro structure, in order to converge the incident light that comes from this color separation module 30, and this incident light converged to not homogeneous location of pixels in corresponding this liquid crystal layer 42, and penetrate with the normal direction that is parallel to these high collimated backlight 20 out-of-planes.The refractive index of this first beam splitting diaphragm 41 is in 1.35 ~ 1.65 scope, this the first beam splitting diaphragm 41 comprises one the 3rd plane of incidence 411 and one the 3rd exit facet, 412, the three planes of incidence 411 are provided with periodicity sphere or the aspheric surface refraction microstructure of cycle in 60 ~ 500 microns scope.What say is, aspheric surface refraction microstructure described herein refers to a cambered surface, is different from sphere and has fixing radius-of-curvature, and this cambered surface does not have fixing radius-of-curvature.Be provided with periodically refractive power microstructure in the 3rd exit facet 412, this refractive power microstructure can adopt the polygonized structure of cycle in 60 ~ 500 microns scope, the 3rd plane of incidence 411 is in order to converge these five incident light L5 that come from this color separation module 30, and in six incident light L6 of these the first beam splitting diaphragm 41 interior formation, the 3rd exit facet 412 is used for providing these six incident light L6 to pass through, and after its light path of deviation, these six incident light L6 deviations are penetrated in this first beam splitting diaphragm 41 to the normal direction deviation of these high collimated backlight 20 out-of-planes, to form incident light L7 seven times, enter in this liquid crystal layer 42, this liquid crystal layer 42 is used for providing these seven incident light L7 to pass through, and these seven incident light L7 can converge to not homogeneous location of pixels in the corresponding liquid crystal layer 42 according to wavelength or incident angle, that is, see through the deviation effect of the 3rd exit facet 412, the normal direction that can make each coloured light that converges via the 3rd plane of incidence 411 can be parallel to this first beam splitting diaphragm 41 enters this liquid crystal layer 42, again by these liquid crystal layer 42 color separations (R for example, G, the B three primary colors) form emergent light L9 and penetrate this liquid crystal layer 42, this emergent light L9 is penetrated with the normal direction that convergence is parallel to these high collimated backlight 20 out-of-planes.Adopt transparent flat glue material 43 bonded to each other between this first beam splitting diaphragm 41 and this liquid crystal layer 42, this glue material 43 is Dry glue, and refractive index is in 1.43 ~ 1.62 scope, and thickness is lower than 200 microns.The part scope has space 431 between this Dry glue and this first beam splitting diaphragm 41, can be air, vacuum one of them or its combination in the space 431, and take air as example, its refractive index is 1.What say is, the part scope has space 431 between glue material 43 and the first beam splitting diaphragm 41, because the material in the space 431 (air) refractive index is less than the first beam splitting diaphragm 41, so can make deflection of light to the normal direction of these high collimated backlight 20 out-of-planes, the path that this moment, glue material 43 passed through as six incident light L6, the refractive index size of this glue material 43 is not limited.Yet in another embodiment, glue material 43 fits in this first beam splitting diaphragm 41 completely, make between this glue material 43 and the first beam splitting diaphragm 41 and do not have the space, this moment, the refractive index of this glue material 43 need be less than or equal to the refractive index of the first beam splitting diaphragm 41, so that six incident light L6 deviations are to the normal direction of these high collimated backlight 20 out-of-planes.
See also second embodiment of the invention structural representation shown in Figure 5, this system for splitting colors comprises a high collimated backlight 20, one color separation module 30 and a beam splitting module 50, the structure of this high collimated backlight 20 and color separation module 30 is identical with this embodiment shown in Figure 4, no longer given unnecessary details at this, the discrepancy of present embodiment is that beam splitting module 50 comprises one second beam splitting diaphragm 51, one liquid crystal layer 52, one the 3rd beam splitting diaphragm 53, the refractive index of this second beam splitting diaphragm 51 and the 3rd beam splitting diaphragm 53 is in 1.35 ~ 1.65 scope, this the second beam splitting diaphragm 51 comprises one the 4th plane of incidence 511 and one the 4th exit facet 512, the 3rd beam splitting diaphragm 53 comprises one the 5th plane of incidence 531 and one the 5th exit facet 532, the 4th plane of incidence 511 is provided with sphere or the aspheric surface refraction microstructure of cycle in 60 ~ 500 microns scope, the 4th exit facet 512, the 5th plane of incidence 531 is the plane, be provided with periodically refractive power microstructure in the 5th exit facet 532, this refractive power microstructure can adopt the polygonized structure of cycle in 60 ~ 500 microns scope, the 4th plane of incidence 511 is in order to converge these five incident light L5 that come from this color separation module 30, and in six incident light L6 of these the second beam splitting diaphragm 51 interior formation, these six incident light L6 are again by the 4th exit facet 512, enter this liquid crystal layer 52, and these six incident light L6 can converge to not homogeneous location of pixels in the corresponding liquid crystal layer 52 according to wavelength or incident angle, to form incident light L7A seven times, these seven incident light L7A are again by the 5th plane of incidence 531, and in eight incident light L8 of the 3rd beam splitting diaphragm 53 interior formation, accept these eight incident light L8 and its light path of deviation by the 5th exit facet 532 again, these eight incident light L8 are penetrated with normal side's direction that convergence is parallel to high collimated backlight 20 out-of-planes, form emergent light L9 and penetrate the 3rd beam splitting diaphragm 53; In addition, the 5th exit facet 532 is coated with transparent adhesive tape material 54a, be used for providing the emergent light L9 through the 5th exit facet 532 deviations to pass through, this glue material Ke Wei Dry glue or wet glue, for example Gai Dry glue of this glue material 54a Cai Yong Dry glue shown in Figure 5 is a smooth glue-line, the part scope is directly fitted in this glue material 54a and 532 each cycle of the 5th exit facet, all the other scopes have space 541 in each cycle, be one of them or its combination of air, vacuum in this space 541, take air as example, its refractive index is 1 in one embodiment.The refractive index of this glue material 54a is in 1.43 ~ 1.62 scope, and thickness is lower than 200 microns.What say is, the part scope has space 541 between glue material 54a and the 3rd beam splitting diaphragm 53, because the material in the space 541 (air) refractive index is less than the 3rd beam splitting diaphragm 53, so can make deflection of light to the normal direction of these high collimated backlight 20 out-of-planes, the path that this moment, glue material 54a passed through as eight incident light L8, the refractive index size of this glue material 54a is not limited.
As for this embodiment as shown in Figure 6, the difference of present embodiment and Fig. 5 embodiment is that this glue material of present embodiment 54b adopts transparent wet glue, and the refractive index of this wet glue is in 1.43 ~ 1.62 scope.In addition, glue material 54b coats on the 5th exit facet 532, makes between this glue material 54b and the 5th exit facet 532 directly to fit, and does not have the generation in space.The refractive index of this glue material 54b need be less than or equal to the refractive index of the 3rd beam splitting diaphragm 53 at this moment.The 3rd beam splitting diaphragm 53 can be 0.05～0.6 scope with the difference of glue material 54a refractive index.The 3rd beam splitting diaphragm 53 and glue material 54a be all in order to control the light direction of this emergent light L9, and make emergent light L9 can tend to be parallel to the normal direction deviation of color separation module 30 and penetrate, that is to the normal direction deviation that is parallel to these high collimated backlight 20 out-of-planes.
See also Fig. 7 fourth embodiment of the invention, it is take this first embodiment of Fig. 4 as the basis, present embodiment comprises a high collimated backlight 20, one color separation module 30a and a beam splitting module 40, the characteristics of present embodiment are, this color separation module 30a only is provided with a slice color separation diaphragm, that is this first color separation diaphragm 31a, come from the original incident light L1 of this high collimated backlight 20 by behind its first plane of incidence 311a, can be with this incident light L1 according to the wavelength light splitting, and in this first color separation diaphragm 31a, form second incident light L2 (that is diffraction light), this second incident light L2 is again by its first exit facet 312a, and this first color separation diaphragm of ejaculation 31a after its light path of deviation, to form incident light L3 three times, by this first exit facet 312 so that this second incident light L2 can be partial to the normal direction of this first color separation diaphragm 31a; The effect of present embodiment is explanation, and color separation module provided by the present invention can arrange a slice or two color separation diaphragms, and the usage quantity of color separation diaphragm is not as limit.
See also Fig. 8 fifth embodiment of the invention, the framework of its synthesizing map 5 these second embodiment and Fig. 7 the 4th embodiment is the basis, the present embodiment explanation, this only is provided with the framework of the color separation module 30a of this first color separation diaphragm 31a, also applicable to the framework of the beam splitting module 50 that is consisted of by one second beam splitting diaphragm 51, a liquid crystal layer 52, one the 3rd beam splitting diaphragm 53, similarly, the transparent adhesive tape material 54a of the Ping Tan Dry glue that present embodiment adopts is also replaceable to be this glue material 54b as shown in Figure 6, this glue material 54b is transparent wet glue, and its aspect is shown in this six embodiment of Fig. 9.What say is, in Fig. 9, glue material 54b fits in the 3rd beam splitting diaphragm 53 completely, makes between this glue material 54b and the 3rd beam splitting diaphragm 53 not have the space, and this moment, the refractive index of this glue material 54b need be less than or equal to the refractive index of the 3rd beam splitting diaphragm 53.The 3rd beam splitting diaphragm 53 can be 0.05～0.6 scope with the difference of glue material 54b refractive index.
In addition, the above first to the 6th different embodiment all can do integration with the reflective brightness enhancement film DBEF of LCD (Dual Brightness Enhancement Film) and polaroid, to improve the luminous energy service efficiency.
In sum, system for splitting colors provided by the invention has functions such as can increasing optics service efficiency, simplification system complexity really, can replace the colored filter that conventional display panels, imageing sensor and colour camera adopt.
The above only is embodiments of the invention, when can not with the scope implemented of restriction the present invention.The equalization of namely generally doing according to claim of the present invention changes and revises, and all should still belong in the scope that patent of the present invention contains.
Claims (14)
1. a system for splitting colors is characterized in that, comprises:
One high collimated backlight is in order to provide an incident light;
One color separation module, consisted of by one first color separation diaphragm, this the first color separation diaphragm comprises one first plane of incidence and one first exit facet, this first plane of incidence has periodically light splitting microstructure, in order to this incident light according to the wavelength light splitting, this first exit facet is provided with periodically polygon refractive power microstructure, this first exit facet is used for providing the incident light through this first plane of incidence light splitting to pass through, and deviation light path, make through the incident light deviation of this first plane of incidence light splitting normal direction to an out-of-plane of this backlight, the refractive index of this first color separation diaphragm is in 1.35～1.65 scope, and the cycle of the light splitting microstructure of this first plane of incidence, the cycle of the polygon refractive power microstructure of this first exit facet was in 10～150 microns scope in 2～5 microns scope; And
One beam splitting module, comprise at least one beam splitting diaphragm and a liquid crystal layer, this beam splitting diaphragm has periodic micro structure, in order to converge the incident light that comes from this color separation module, and this incident light converged to not homogeneous location of pixels in corresponding this liquid crystal layer, and be parallel to this normal direction with convergence and penetrate;
This beam splitting module comprises one first beam splitting diaphragm, and the refractive index of this first beam splitting diaphragm is in 1.35～1.65 scope, and this first beam splitting diaphragm comprises:
One the 3rd plane of incidence is provided with periodically and reflects microstructure, and the 3rd plane of incidence is in order to converge the incident light that comes from this color separation module, and the cycle of the refraction microstructure of the 3rd plane of incidence is in 60～500 microns scope; And
One the 3rd exit facet, be provided with periodically refractive power microstructure, the 3rd exit facet provides the incident light that converges through the 3rd plane of incidence to pass through, and its light path of deviation, incident light deviation through the 3rd plane of incidence light splitting is penetrated to this normal direction, enter in this liquid crystal layer, the cycle of the refractive power microstructure of the 3rd exit facet is in 60～500 microns scope.
2. system for splitting colors as claimed in claim 1 is characterized in that, the collimation scope of this high collimated backlight is that the angle of divergence is lower than full width at half maximum 10 degree, is 0～50 degree with respect to its oblique incidence angle of this normal direction.
3. system for splitting colors as claimed in claim 1 is characterized in that, also comprises one second color separation diaphragm, and this second color separation diaphragm comprises:
One second plane of incidence is a plane, and this second plane of incidence is used for providing the incident light through this first exit facet deviation to pass through; And
One second exit facet is provided with periodically polygon refractive power microstructure, and this second exit facet is used for providing the incident light through this second plane of incidence to pass through, and its light path of deviation, and the incident light deviation through this second plane of incidence light splitting is penetrated to this normal direction.
4. system for splitting colors as claimed in claim 3 is characterized in that, the refractive index of this second color separation diaphragm is in 1.35～1.65 scope, and the cycle of the polygon refractive power microstructure of this second exit facet is in 10～150 microns scope.
5. system for splitting colors as claimed in claim 1, it is characterized in that this beam splitting module comprises a glue material, bonded to each other with this glue material between this first beam splitting diaphragm and this liquid crystal layer, wherein the refractive index of this glue material is in 1.43～1.62 scope, and thickness is lower than 200 microns.
6. system for splitting colors as claimed in claim 5 is characterized in that, the refractive index of this glue material is less than or equal to the refractive index of this first beam splitting diaphragm.
7. system for splitting colors as claimed in claim 5 is characterized in that, the part scope has a space between this glue material and this first beam splitting diaphragm, is one of them or its combination of air, vacuum in this space.
8. a system for splitting colors is characterized in that, comprises:
One high collimated backlight is in order to provide an incident light;
One color separation module, consisted of by one first color separation diaphragm, this the first color separation diaphragm comprises one first plane of incidence and one first exit facet, this first plane of incidence has periodically light splitting microstructure, in order to this incident light according to the wavelength light splitting, this first exit facet is provided with periodically polygon refractive power microstructure, this first exit facet is used for providing the incident light through this first plane of incidence light splitting to pass through, and deviation light path, make through the incident light deviation of this first plane of incidence light splitting normal direction to an out-of-plane of this backlight, the refractive index of this first color separation diaphragm is in 1.35～1.65 scope, and the cycle of the light splitting microstructure of this first plane of incidence, the cycle of the polygon refractive power microstructure of this first exit facet was in 10～150 microns scope in 2～5 microns scope; And
One beam splitting module, comprise at least one beam splitting diaphragm and a liquid crystal layer, this beam splitting diaphragm has periodic micro structure, in order to converge the incident light that comes from this color separation module, and this incident light converged to not homogeneous location of pixels in corresponding this liquid crystal layer, and be parallel to this normal direction with convergence and penetrate;
This beam splitting module comprises one second beam splitting diaphragm, one the 3rd beam splitting diaphragm, and this second beam splitting diaphragm comprises:
One the 4th plane of incidence is provided with periodically and reflects microstructure, and the 4th plane of incidence is in order to converge the incident light that comes from this color separation module; And
One the 4th exit facet is a plane, and the 4th exit facet is used for providing the incident light that converges through the 4th plane of incidence to pass through, and is incident in this liquid crystal layer;
The 3rd beam splitting diaphragm comprises:
One the 5th plane of incidence is a plane, and the 5th plane of incidence is used for providing the incident light by this liquid crystal layer to pass through; And
One the 5th exit facet is provided with periodically refractive power microstructure, and the 5th exit facet is used for providing the incident light through the 5th plane of incidence to pass through, and its light path of deviation, makes the incident light through the 5th plane of incidence light splitting be parallel to this normal direction ejaculation with convergence.
9. system for splitting colors as claimed in claim 8 is characterized in that, this second beam splitting diaphragm refractive index is in 1.35～1.65 scope, and the cycle of the refraction microstructure of the 4th plane of incidence is in 60～500 microns scope.
10. system for splitting colors as claimed in claim 8 is characterized in that, the refractive index of the 3rd beam splitting diaphragm is in 1.35～1.65 scope, and the cycle of the refractive power microstructure of the 5th exit facet is in 60～500 microns scope.
11. system for splitting colors as claimed in claim 8 is characterized in that, the 5th exit facet is coated with a glue material, and wherein the refractive index of this glue material is in 1.43～1.62 scope, and thickness is lower than 200 microns.
12. system for splitting colors as claimed in claim 11 is characterized in that, the refractive index of this glue material is less than or equal to the refractive index of the 3rd beam splitting diaphragm.
13. system for splitting colors as claimed in claim 11 is characterized in that, the part scope has a space between this glue material and the 3rd beam splitting diaphragm, is one of them or its combination of air, vacuum in this space.
14. system for splitting colors as claimed in claim 12 is characterized in that, the difference of the refractive index of the 3rd beam splitting diaphragm and this glue material is 0.05～0.6 scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910265505 CN102109681B (en) | 2009-12-25 | 2009-12-25 | Color beam splitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910265505 CN102109681B (en) | 2009-12-25 | 2009-12-25 | Color beam splitting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102109681A CN102109681A (en) | 2011-06-29 |
| CN102109681B true CN102109681B (en) | 2013-10-16 |
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| CN110620861B (en) * | 2019-09-24 | 2021-10-15 | Oppo广东移动通信有限公司 | Image sensor, camera module and terminal |
| CN113068012A (en) * | 2021-04-08 | 2021-07-02 | 中山联合光电研究院有限公司 | Imaging system and imaging apparatus |
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| CN1438513A (en) * | 2002-02-10 | 2003-08-27 | 上海力保科技有限公司 | Light-diviging apparatus and method for digital projector |
| CN1591085A (en) * | 2003-09-05 | 2005-03-09 | 昂纳明达网络技术（深圳）有限公司 | Colour spectral-assembling optical system and liquid crystal projecting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438513A (en) * | 2002-02-10 | 2003-08-27 | 上海力保科技有限公司 | Light-diviging apparatus and method for digital projector |
| CN1591085A (en) * | 2003-09-05 | 2005-03-09 | 昂纳明达网络技术（深圳）有限公司 | Colour spectral-assembling optical system and liquid crystal projecting system |
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