CN208156364U - A kind of PDLC rear projection screen and optical projection system - Google Patents
A kind of PDLC rear projection screen and optical projection system Download PDFInfo
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- CN208156364U CN208156364U CN201820479912.5U CN201820479912U CN208156364U CN 208156364 U CN208156364 U CN 208156364U CN 201820479912 U CN201820479912 U CN 201820479912U CN 208156364 U CN208156364 U CN 208156364U
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- pdlc
- projection screen
- rear projection
- projector
- light
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- Optical Elements Other Than Lenses (AREA)
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Abstract
The utility model discloses a kind of PDLC rear projection screen and optical projection systems, wherein PDLC rear projection screen includes perspective plane and viewing surface, the outside on the perspective plane is equipped with for passing through polarised light X and the reflective polarizer films of polarization by reflection light Y, polarised light X are vertical with the polarization direction of polarised light Y.PDLC rear projection screen provided by the utility model and optical projection system can reduce the light reflection on PDLC rear projection screen perspective plane, reduce light interference.
Description
Technical field
The utility model relates to display device technical field, in particular to a kind of PDLC rear projection screen and optical projection system.
Background technique
PDLC is polymeric liquid crystal copolymer, is consolidated by two ITO nesa coating intermediate course liquid crystalline resins by UV
Change.Due to the performance of the dielectric anisotropy of liquid crystal, liquid crystal is consistent with resin index after energization, realizes transparent (penetrate
Rate > 75%), liquid crystal irregular alignment after power-off causes liquid crystal and resin index variant, and mist state, that is, frosted state is presented.
It realizes transparent being switched fast between frosted, is widely used in the door and window system of building, bathroom separates, and conference centre is both beautiful
See the function of having secret protection again.Simultaneously as the refractive index of liquid crystal and resin is variant under off-position, light is by being somebody's turn to do
Scattering state is presented after layer, the function as rear projection screen may be implemented.
At present there are two types of the application modes of pdlc film, it is attached to surface layer of glass or doubling certainly among two glass.Herein
Described in PDLC projection screen, cover this two kinds of application modes.
PDLC rear projection screen at present main drawback is that, perspective plane and viewing surface are different, and projection ray passes through
After projection screen, after the diffusion of liquid crystalline resin layer and refraction, observer can overleaf see clearly image.But it throws
Shadow face often has the generation of reflection, and when projection environment space is smaller, the light of surface reflection interferes very indoor light
Seriously, the comfort level of indoor occupant is influenced, on the wall on its specular opposite of reflected light on What is more surface, is presented clearly
Picture.
Utility model content
In order to solve the problems in the prior art, one of the utility model aim is to provide a kind of PDLC rear projection screen
Curtain, reduces the reflection on perspective plane.
The another object of the utility model is to provide a kind of PDLC optical projection system of low surface reflection, reduces PDLC back projection
The reflection in screen prjection face avoids the formation of light interference.
Based on the above issues, technical solution provided by the utility model first is that：
A kind of PDLC rear projection screen comprising the outside of perspective plane and viewing surface, the perspective plane is equipped with for making partially
Vibration light X passes through and the reflective polarizer films of polarization by reflection light Y, polarised light X are vertical with the polarization direction of polarised light Y.
In one of the embodiments, the reflective polarizer films to the reflectivity of s polarised light less than 5%, preferably 3%.
The reflective polarizer films (5) are greater than 60% to the reflectivity of p-polarization light in one of the embodiments, preferably
75%.
In one of the embodiments, the reflective polarizer films (5) with a thickness of 50-250 μm, preferably 135 μm.
The PDLC rear projection screen is arranged between glass surface or layer glass in one of the embodiments,.
The reflective polarizer films include the multilayer laminated alternating of at least two different materials in one of the embodiments,
Layer, wherein the refringence between different material layer along the first face in direction is greater than between different materials along the second face
The refringence in direction.
Based on the above issues, technical solution provided by the utility model second is that：
A kind of PDLC optical projection system, including above-mentioned PDLC rear projection screen, projector and screen generating device, the throwing
Shadow instrument is oppositely arranged with the perspective plane, and the projector is connect to export projected picture with the screen generating device, described
The picture of projector is equipped with the polarizer for output light to be changed into s polarised light, the perspective plane of the PDLC rear projection screen
Equipped with the reflective polarizer films for passing through s polarised light.
In one of them embodiment, the distance of the projector to the perspective plane of the PDLC rear projection screen meets
The display area of picture size and the PDLC rear projection screen in the projector projects to the PDLC rear projection screen
Unanimously.
In one of them embodiment, the projector is LCD projector, CRT projector or DLP projector.
In one of them embodiment, the screen generating device is computer, DVD or MP4.
Compared with prior art, the utility model has the advantages that：
Using the technical solution of the utility model, the polarizer is set on projector, output light is changed into s polarised light, together
When the perspective plane of PDLC rear projection screen be equipped with reflective polarizer films to allow s polarised light to pass through, reduce perspective plane light reflection,
It avoids generating light interference, and PDLC rear projection screen, under energization or power blackout situation, the two sides of observer from screen are considerable
Observe projection.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, and the drawings in the following description are merely some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of structural schematic diagram of PDLC optical projection system embodiment of the utility model；
Wherein：
1, PDLC rear projection screen；1-1, transparent conductive film；1-2, liquid crystalline resin；
2, projector；
3, screen generating device；
4, the polarizer；
5, reflective polarizer films；
A, s polarised light.
Specific embodiment
Above scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are for illustrating
The utility model and be not limited to limitation the scope of the utility model.Implementation condition used in the examples can be according to specific producer
Condition do further adjustment, the implementation condition being not specified is usually the condition in routine experiment.
Referring to Fig. 1, it is the structural schematic diagram of the utility model embodiment, a kind of PDLC optical projection system, including PDLC is provided
Rear projection screen 1, projector 2 and screen generating device 3.
Wherein PDLC rear projection screen 1 includes perspective plane and viewing surface, is equipped in the outside on perspective plane for making polarised light X
By and polarization by reflection light Y reflective polarizer films 5, polarised light X is vertical with the polarization direction of polarised light Y.
Preferably, the reflective polarizer films 5 to the reflectivity of s polarised light less than 5%, preferably 3%.
60%, preferably 75% is greater than to the reflectivity of p-polarization light.
With a thickness of 50-250 μm, preferably 135 μm.The reflective polarizer films 5 include the multi-laminate of at least two different materials
Layer alternating layer, wherein refringence between different material layer along the first face in direction is greater than between different materials along the
The refringence in two directions in face.
PDLC rear projection screen 1 may be provided between glass surface or layer glass.
PDLC rear projection screen 1 is solidified to obtain by two transparent conductive film 1-1 intermediate course liquid crystalline resin 1-2 by UV,
It is with astigmatism and light transmission two states, and under applied voltage state, regular electric field, liquid crystal particle cannot be formed between screen
Direction of optic axis it is random, disordered state is presented, for effective refractive index not with the index matching of polymer, incident ray is strong
Scattering, film is in opaque or translucent.Under applied voltage state, the optical axis normal to screen surface of liquid crystal particle is arranged
Column, i.e., it is consistent with direction of an electric field.The ordinary refraction index of liquid crystal particle matches substantially with the refractive index of polymer, is situated between without obvious
Face constitutes substantially homogeneous medium, so incident light will not scatter, film is transparent.
PDLC rear projection screen 1 is normally placed on exterior walls of buildings wall, projector 2 setting interior of building and with throwing
Shadow face is oppositely arranged, and projector 2 projects picture on perspective plane, and observer can observe projected picture from architectural appearance, projection
Instrument 2 is connect to export projected picture with screen generating device 3, and in implementation, projector 2 can be LCD projector, CRT projector
Or DLP projector, screen generating device 3 can be computer, DVD or MP4 etc., can lead between projector 2 and screen generating device 3
Cross wired connection or wireless connection.The distance on the perspective plane of PDLC rear projection screen 1 meets the projector 2 and projects PDLC back
Picture size on projection screen 1 is consistent with the display area of PDLC rear projection screen 1, completely to show projected picture.
In order to reduce perspective plane light reflection, avoid generate light interference, on projector 2 be equipped with the polarizer 4 with for will
Output light is changed into s polarised light A, while being equipped with reflective polarizer films 5 for polarizing s on the perspective plane of PDLC rear projection screen 1
Light A substantially completely passes through, and reflective polarizer films 5 less than 5%, are greater than the reflectivity of s polarised light A to the reflectivity of p-polarization light
60%, to reduce light reflection.Reflective polarizer films 5 are the prior art, and the utility model repeats no more, such as United States Patent (USP)
US5882774A, which is disclosed, does not reflect s polarised light, and increases and monotone increasing with incidence angle the reflectivity of p-polarization light
Big p-polarization device, in embodiment, the refractive index difference selection that thickness degree appropriate and each layer of adjustment can be selected is made into only to P
The diaphragm of polarised light reflection, diaphragm are made of multiple polymers.
Examples detailed above is only to illustrate the technical ideas and features of the present invention, and its object is to allow be familiar with technique
People is can to understand the content of the utility model and implement accordingly, is not limited the protection scope of the present invention.It is all
According to the spirit of the present invention substantially equivalent transformation that is done or modification, should all cover the protection scope of the utility model it
It is interior.
Claims (10)
1. a kind of PDLC rear projection screen, it is characterised in that：Including perspective plane and viewing surface, the outside on the perspective plane, which is equipped with, to be used
In passing through polarised light X and the reflective polarizer films (5) of polarization by reflection light Y, polarised light X is vertical with the polarization direction of polarised light Y.
2. PDLC rear projection screen according to claim 1, it is characterised in that：The reflective polarizer films (5) are to s polarised light
Reflectivity less than 5%, preferably 3%.
3. PDLC rear projection screen according to claim 2, it is characterised in that：The reflective polarizer films (5) are to p-polarization light
Reflectivity be greater than 60%, preferably 75%.
4. PDLC rear projection screen according to claim 1, it is characterised in that：The reflective polarizer films (5) with a thickness of
50-250 μm, preferably 135 μm.
5. PDLC rear projection screen according to claim 1, it is characterised in that：The PDLC rear projection screen is arranged in glass
Between glass surface or layer glass.
6. PDLC rear projection screen according to claim 1, it is characterised in that：The reflective polarizer films (5) include at least
The multilayer laminated alternating layer of two kinds of different materials, wherein the refringence between different material layer along the first face in direction is big
In between different materials along the second face direction refringence.
7. a kind of PDLC optical projection system, including PDLC rear projection screen (1), the projector (2) as described in claim 1-6 is any
With screen generating device (3), the projector (2) is oppositely arranged with the perspective plane, and the projector (2) and the picture are raw
It connects at device (3) to export projected picture, it is characterised in that：The projector (2) is equipped with inclined for output light to be changed into s
The polarizer (4) of vibration light, the perspective plane of the PDLC rear projection screen (1) are equipped with the polarization by reflection for passing through s polarised light
Film (5).
8. PDLC optical projection system according to claim 7, it is characterised in that：The projector (2) arrives the PDLC rear-projection
The distance on shadow screen (1) perspective plane meets the projector (2) and projects picture size on the PDLC rear projection screen (1)
It is consistent with the display area of the PDLC rear projection screen (1).
9. PDLC optical projection system according to claim 7, it is characterised in that：The projector (2) is LCD projector, CRT
Projector or DLP projector.
10. PDLC optical projection system according to claim 7, it is characterised in that：The screen generating device (3) be computer,
DVD or MP4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820479912.5U CN208156364U (en) | 2018-03-30 | 2018-03-30 | A kind of PDLC rear projection screen and optical projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820479912.5U CN208156364U (en) | 2018-03-30 | 2018-03-30 | A kind of PDLC rear projection screen and optical projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208156364U true CN208156364U (en) | 2018-11-27 |
Family
ID=64380867
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820479912.5U Active CN208156364U (en) | 2018-03-30 | 2018-03-30 | A kind of PDLC rear projection screen and optical projection system |
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| CN (1) | CN208156364U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110109319A (en) * | 2019-05-10 | 2019-08-09 | 上海瀚沧科技有限公司 | Augmented reality is adjustable transparent projection screen and projecting method and production method |
| CN111954024A (en) * | 2020-08-27 | 2020-11-17 | 顾建亮 | Course recording live broadcasting method and system |
| WO2021139995A1 (en) | 2020-01-06 | 2021-07-15 | Saint-Gobain Glass France | Glass vehicle side window and partition window with active projection transparent screen |
-
2018
- 2018-03-30 CN CN201820479912.5U patent/CN208156364U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110109319A (en) * | 2019-05-10 | 2019-08-09 | 上海瀚沧科技有限公司 | Augmented reality is adjustable transparent projection screen and projecting method and production method |
| CN110109319B (en) * | 2019-05-10 | 2021-01-19 | 上海瀚沧科技有限公司 | Augmented reality adjustable transparent projection screen, projection method and manufacturing method |
| WO2021139995A1 (en) | 2020-01-06 | 2021-07-15 | Saint-Gobain Glass France | Glass vehicle side window and partition window with active projection transparent screen |
| CN111954024A (en) * | 2020-08-27 | 2020-11-17 | 顾建亮 | Course recording live broadcasting method and system |
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| GR01 | Patent grant | ||
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| PP01 | Preservation of patent right |
Effective date of registration: 20190121 Granted publication date: 20181127 |
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| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220121 Granted publication date: 20181127 |