CN207541395U - Two-sided translucent back-projection system - Google Patents
Two-sided translucent back-projection system Download PDFInfo
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- CN207541395U CN207541395U CN201721588540.1U CN201721588540U CN207541395U CN 207541395 U CN207541395 U CN 207541395U CN 201721588540 U CN201721588540 U CN 201721588540U CN 207541395 U CN207541395 U CN 207541395U
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Abstract
The utility model is about a kind of two-sided translucent back-projection system, and it includes the first polarization projection arrangement, the second polarization projection arrangement and anisotropy scattering films.First polarization projection arrangement projection the first polarization image light, the second polarization projection arrangement projection the second polarization image light.The anisotropy scattering film is set between the first polarization projection arrangement and the second polarization projection arrangement, to receive the first polarization image light and the second polarization image light simultaneously, the anisotropy scattering film includes the porous substrate with a plurality of elongated holes, and it is filled in the liquid crystal in those elongated holes, those elongated holes and liquid crystal are arranged along the long axis direction of the elongated hole, and the anisotropy scattering film has the scattering axis parallel with the long axis direction of the elongated hole and the axis of homology orthogonal with the scattering axis.Wherein, the polarization direction of the first polarization image light and the second polarization image light is all mutually parallel with the scattering axis.The two-sided translucent back-projection system of the utility model can provide the translucent drop shadow effect of double-face imaging simultaneously, and not interfered with each other between image.
Description
Technical field
The utility model is related to a kind of two-sided translucent back-projection systems, refer in particular to a kind of double with preferable image contrast
The translucent back-projection system in face.
Background technology
The projection screen of optical projection system does not have self-emitting light source in the prior art, therefore projection screen can not generate image in itself, need to be by
By projector image light on projection screen and after scattering imaging, image light can just be transferred to user's eyes, therefore,
Brightness, contrast and the effect of saturation degree that the design of projection screen can show image are quite big.Optical projection system is general again can be according to
Projector's viewing location opposite with user and divide into orthographic projection system and back-projection system, back-projection system because for
For user, the image light that projector is projected is located at the opposite side of projection screen with user respectively, and user is watched
Image light belong to the light of transmission；And orthographic projection system is for user, the image light that projector is projected with
User is all located at the homonymy of projection screen, and the image light that user is watched belongs to the light of reflection, therefore back-projection system has
There are preferable image brilliance, contrast and saturation degree.
But if the both sides for making full use of projection screen, the effect of both sides all projectable's imagings is reached, can only routinely be adopted
With lighttight projection screen and both sides are arranged in pairs or groups all by the way of orthographic projection system, are interfered with each other to avoid two side images.If therefore
During further using translucent projection screen to form two-sided translucent back projection effect, because translucent projection screen also need to have to
Few about 50% penetration can just have the effect that can watch both sides projection image light and translucent projection screen rear scenery simultaneously
Fruit, but the dispersion effect of image light is just accordingly greatly reduced in translucent projection screen, and make translucent back-projection system
Image contrast is bad, and because translucent projection screen in addition to scattering image light, can also reflect and interfere the shadow of opposite side
Picture, especially insufficient in image contrast, the interference between two side images will make biplane projection imaging effect be difficult to reach
Practicability.
Utility model content
To improve the problem of above-mentioned two-sided translucent back-projection system video imaging is ineffective, the utility model provides one
The two-sided translucent back-projection system of kind.
Above-mentioned two-sided translucent back-projection system includes：
First polarization projection arrangement, projection the first polarization image light；
Second polarization projection arrangement, projection the second polarization image light；And
Anisotropy scattering film is set between the first polarization projection arrangement and the second polarization projection arrangement, with simultaneously
Receive the first polarization image light and the second polarization image light, which, which includes, has a plurality of elongated holes
The porous substrate in hole and the liquid crystal being filled in a plurality of elongated holes, a plurality of elongated holes and liquid crystal edge should
The long axis direction arrangement of elongated hole, and the anisotropy scattering film has the scattering parallel with the long axis direction of the elongated hole
Axis and the axis of homology orthogonal with the scattering axis；
Wherein, this first polarization image light polarization direction, this second polarization image light polarization direction with this
Scattering axis is mutually parallel.
As optional technical solution, the scattering axis direction of the anisotropy scattering film for the first polarization image light with
This second polarization image light penetrance respectively correspondingly more than the anisotropy scattering film scattering axis direction for this first
Polarize the reflectivity of image light and the second polarization image light.
As optional technical solution, the scattering axis direction of the anisotropy scattering film for the first polarization image light with
The penetrance range of the second polarization image light is 50% to 99%.
As optional technical solution, the scattering axis direction of the anisotropy scattering film for the first polarization image light with
The reflectivity range of the second polarization image light is 0.1% to 8%.
As optional technical solution, which is isotropism resin layer.
As optional technical solution, the refractive index (np) ranging from 1.4 to 1.7 of the isotropism resin layer.
As optional technical solution, which has abnormal optical index (ne) and ordinary refraction index (no).
As optional technical solution, the refractive index difference ranging from 0.2 of the exception optical index and ordinary refraction index
To 0.25.
As optional technical solution, at least one surface of the anisotropy scattering film has anti-reflection coating.
As optional technical solution, two-sided translucent back-projection system further includes at least one environment light source, the environment
Light source provides the polarized light source parallel with the anisotropy scattering film axis of homology.
Compared with the prior art, the two-sided translucent back-projection system of the utility model has can watch the first polarization simultaneously
The effect of image light, the second polarization image light and anisotropy scattering film rear scenery, and polarize image light and scenery not
Easily interfere with each other.
The utility model is described in detail, but not as to the utility model below in conjunction with the drawings and specific embodiments
Restriction.
Description of the drawings
Fig. 1 is the two-sided translucent back-projection system schematic diagram of one embodiment of the utility model；
Fig. 2 is the two-sided translucent back-projection system schematic diagram of another embodiment of the utility model.
Specific embodiment
The effect of to make the utility model feature, content and advantage of the utility model and its can reach, is more readily apparent, hereby
The utility model is coordinated into schema, and detailed description are as follows with the expression-form of embodiment, and wherein used schema, master
Purport is only to illustrate and aid in illustrating book to be used, and may not be the actual proportions after the utility model is implemented and precisely configuration, therefore should not
Ratio and configuration relation with regard to appended schema are understood, limitation the utility model is in the scope of the claims in actual implementation, and conjunction is first chatted
It is bright.
Hereinafter with reference to correlative type, illustrate the embodiment according to the two-sided translucent back-projection system of the utility model, to make
It is easy to understand, the same components in following embodiments are illustrated with the same symbol mark.
Please refer to shown in Fig. 1, the utility model provides a kind of two-sided translucent back-projection system 1, and it includes first
It polarizes projection arrangement 2, second and polarizes projection arrangement 3 and anisotropy scattering film 4, first polarization projection arrangement 2 the first polarization of projection
Image light 2a；Second polarization projection arrangement 3 projection second polarization image light 3a, anisotropy scattering film 4, be set to this first
Polarize projection arrangement 2 and this second polarization projection arrangement 3 between, with simultaneously receive this first polarization image light 2a with this second
Image light 3a is polarized, which includes the porous substrate 4b with a plurality of elongated hole 4a and be filled in
Liquid crystal 5 in elongated hole, those elongated hole 4a and liquid crystal 5 arrange, and the different side along the long axis direction of the elongated hole 4a
Property scattering film 4 have and the parallel scattering axis 41 of long axis direction of the elongated hole 4a and the transmission orthogonal with the scattering axis 41
Axis 42.Wherein, polarization directions and scattering axis 41 phase of the first polarization image light 2a with second polarization image light 3a
It is mutually parallel.
Cause can be in the anisotropy scattering film 4 by the light component on scattering 41 direction of axis of the anisotropy scattering film 4
Porous substrate 4b and 5 interface of liquid crystal generate scattering and be imaged, and the light on 42 direction of the axis of homology of the anisotropy scattering film 4
Component then can be transmitted directly without generating scattering in the anisotropy scattering film 4, therefore when the first polarization projection arrangement 2 and second is inclined
The first polarization image light 2a that the projection arrangement 3 that shakes is projected with second polarize the polarization direction of image light 3a all with the scattering
When axis 41 is mutually parallel, the first polarization image light 2a and the second polarization image light 3a can be fully in the anisotropy scattering films 4
Upper scattering imaging is lost, and the light that the scenery of 4 both sides of anisotropy scattering film is reflected only is dissipated with the anisotropy without causing
It penetrates the light component transmissive of 4 axis of homology of film, 42 same direction and is watched simultaneously by user, therefore the utility model is two-sided
Translucent back-projection system is dissipated with that can watch the first polarization image light 2a, the second polarization image light 3a and anisotropy simultaneously
The effect of 4 rear scenery of film is penetrated, and polarizes image light and is not easy to interfere with each other with scenery.
In the two-sided translucent back-projection system of an embodiment, 41 direction of the anisotropy scattering film 4 scattering axis is for this
The penetrance of first polarization image light 2a and second polarization image light 3a are respectively correspondingly more than the anisotropy scattering film 4
Scatter reflectivity of 41 direction of axis for the first polarization image light 2a and second polarization image light 3a.Wherein, this is different
Side's property scattering film 4 scatters penetrance of 41 direction of axis for the first polarization image light 2a and second polarization image light 3a
Ranging from 50% to 99%；The anisotropy scattering film 4 scatter 41 direction of axis for this first polarization image light 2a with this second
The reflectivity range for polarizing image light 3a is 0.1% to 8%.Therefore the incident anisotropy scatterings of first polarization image light 2a
When film 4 scatters 41 direction of axis, the extremely low reflection of absorption and 41 direction of scattering axis in addition to the anisotropy scattering film 4 material itself
Outside, first polarization image light 2a fully by the anisotropy scattering film 4 and can be scattering into picture, without reason reflected light
Ratio is excessively high and the second polarization image light 3a with opposite side institute projection imaging is interfered with each other；Conversely, the second polarization image light
The reflected light of line 3a will not also influence image formed by the first polarization image light 2a, therefore first polarizes image light 2a and second
Polarization image light 3a in scattered on the anisotropy scattering film 4 formation image each other can independent imaging it is dry without overlapping each other
It disturbs.
In addition, for back-projection system, because projection arrangement is identical source with its projection ray relative usage person
Direction, when the translucent scattering film using non-anisotropy in the prior art is as back projection curtain, projection ray of projection arrangement institute
Translucent scattering film will be directed through in the part that imaging is scattered on translucent scattering film, user is made to feel dazzling, therefore must
Must increase the relative angle of projection arrangement and translucent scattering film, but this will cause projection ray due to oblique incidence utilization rate compared with
Difference reduces the brightness and comparison of projection ray.First polarization projection dress of the two-sided translucent back-projection system of the utility model
It puts 2 and second and polarizes projection arrangement 3, the first polarization image light 2a and the second polarization image light 3a projected is then because of polarization
The scattering axis 41 of all parallel anisotropy scattering film 4 in direction, therefore the first polarization image light 2a and the second polarization image light 3a are simultaneously
Do not have the light component on 42 direction of the axis of homology, therefore, even if direct projection anisotropy scattering film 4,4 both sides of anisotropy scattering film use
Person will not also feel dazzling direct image light, instead because the first polarization image light 2a and the second polarization image light 3a can
Using 4 mode of near vertical incidence anisotropy scattering film, make rear-projection image that there is preferable brightness and comparison.
In the two-sided translucent back-projection system of another embodiment, porous substrate 4b is isotropism resin layer, should
The refractive index (np) ranging from 1.4 to 1.7 of isotropism resin layer.
In the two-sided translucent back-projection system of another embodiment, which has abnormal optical index
(ne), short-axis direction has ordinary refraction index (no), refraction of the ordinary refraction index preferably with the isotropism resin layer
Rate is identical, and the refractive index difference ranging from 0.2 to 0.25 of the exception optical index and ordinary refraction index, therefore, in liquid crystal 5
Scattering axis 41, liquid crystal 5 can be formed on long axis direction due to abnormal optical index is different from the refractive index of the isotropism resin layer
The axis of homology 42 can be formed on short-axis direction due to ordinary refraction index is identical with the refractive index of the isotropism resin layer.
In the two-sided translucent back-projection system of another embodiment, at least one surface tool of the anisotropy scattering film 4
There is anti-reflection coating (not shown), reflected, and increase light transmittance with reducing anisotropy scattering film 4 and the light of air interface.
Shown in please referring to Fig.2, when for instance in the interior space, in the two-sided translucent back-projection system of another embodiment
In 11, two-sided translucent back-projection system 11 further includes environment light source 6, which provides saturating with the anisotropy scattering film 4
Penetrate the parallel polarized light source 6a of axis 42, the environment light source 6 can provide arround scenery illumination, it is and inclined because of polarized light source 6a
Shake direction parallel transmission axis 42, can be directed through the anisotropy scattering film 4, will not be imaged in being scattered on the anisotropy scattering film 4
And the first polarization image light 2a and the second polarization image light 3a is interfered, it will not also influence image contrast and saturation degree.
In conclusion the two-sided translucent back-projection system of the utility model has can watch the first polarization image light simultaneously
The effect of line, the second polarization image light and anisotropy scattering film rear scenery, and polarize image light and be not easy mutually with scenery
Interference.
Certainly, the utility model can also have other various embodiments, without departing substantially from the spirit of the present invention and its essence
In the case of, those skilled in the art can make various corresponding changes and deformation, but these phases according to the utility model
The change and deformation answered should all belong to the scope of the claims appended by the utility model.
Claims (10)
1. a kind of two-sided translucent back-projection system, which is characterized in that the two-sided translucent back-projection system includes：
First polarization projection arrangement, projection the first polarization image light；
Second polarization projection arrangement, projection the second polarization image light；And
Anisotropy scattering film is set between the first polarization projection arrangement and the second polarization projection arrangement, to receive simultaneously
The first polarization image light is included with the second polarization image light, the anisotropy scattering film with a plurality of elongated holes
Porous substrate and the liquid crystal being filled in a plurality of elongated holes, a plurality of elongated holes and the liquid crystal are elongated along this
The long axis direction arrangement of hole, and the anisotropy scattering film have the scattering axis parallel with the long axis direction of the elongated hole and
The axis of homology orthogonal with the scattering axis；
Wherein, this first polarization image light polarization direction, this second polarization image light polarization direction with the scattering
Axis is mutually parallel.
2. two-sided translucent back-projection system as described in claim 1, which is characterized in that the scattering axis of the anisotropy scattering film
Direction is respectively correspondingly more than the anisotropy for the penetrance of the first polarization image light and the second polarization image light
The scattering axis direction of scattering film is for the reflectivity of the first polarization image light and the second polarization image light.
3. two-sided translucent back-projection system as claimed in claim 2, which is characterized in that the scattering axis of the anisotropy scattering film
Direction is 50% to 99% for the penetrance range of the first polarization image light and the second polarization image light.
4. two-sided translucent back-projection system as claimed in claim 2, which is characterized in that the scattering axis of the anisotropy scattering film
Direction is 0.1% to 8% for the reflectivity range of the first polarization image light and the second polarization image light.
5. two-sided translucent back-projection system as described in claim 1, which is characterized in that the porous substrate is isotropism tree
Lipid layer.
6. two-sided translucent back-projection system as claimed in claim 5, which is characterized in that the refraction of the isotropism resin layer
Rate (np) ranging from 1.4 to 1.7.
7. two-sided translucent back-projection system as described in claim 1, which is characterized in that the liquid crystal has abnormal optical index
(ne) with ordinary refraction index (no).
8. two-sided translucent back-projection system as claimed in claim 7, which is characterized in that the exception optical index and ordinary light
The refractive index difference of refractive index ranging from 0.2 to 0.25.
9. two-sided translucent back-projection system as described in claim 1, which is characterized in that at least the one of the anisotropy scattering film
A surface has anti-reflection coating.
10. two-sided translucent back-projection system as claimed in any one of claims 1-9 wherein, which is characterized in that two-sided translucent
Back-projection system further includes at least one environment light source, which provides and the anisotropy scattering film axis of homology
Parallel polarized light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721588540.1U CN207541395U (en) | 2017-11-24 | 2017-11-24 | Two-sided translucent back-projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721588540.1U CN207541395U (en) | 2017-11-24 | 2017-11-24 | Two-sided translucent back-projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207541395U true CN207541395U (en) | 2018-06-26 |
Family
ID=62615044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721588540.1U Active CN207541395U (en) | 2017-11-24 | 2017-11-24 | Two-sided translucent back-projection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207541395U (en) |
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2017
- 2017-11-24 CN CN201721588540.1U patent/CN207541395U/en active Active
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