CN101452197B - Image screen - Google Patents
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- CN101452197B CN101452197B CN 200710196256 CN200710196256A CN101452197B CN 101452197 B CN101452197 B CN 101452197B CN 200710196256 CN200710196256 CN 200710196256 CN 200710196256 A CN200710196256 A CN 200710196256A CN 101452197 B CN101452197 B CN 101452197B
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- Prior art keywords
- optical reflection
- lamination
- image screen
- metal film
- light
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Abstract
The invention discloses an image screen. The image screen comprises a transparent substrate, a metal film and an optical reflection overlayer. The metal film is arranged on a first surface of the transparent substrate and has preset thickness; the optical reflection overlayer is arranged above the metal film; and the metal film and the optical reflection overlayer act together to produce selective reflection of light of part of wave length. In addition, a diffusion microstructure layer can also be arranged on a second surface of the transparent substrate according to requirements. Furthermore, another reflection layer or a light absorption film can also be arranged on the other side of the optical reflection overlayer; and the reflection layer can be the metal film.
Description
Technical field
The present invention relates to a kind of image screen, the characteristic that has high contrast effect and adjust the field of view shape of outgoing.
Background technology
Projector is widely used in aspects such as meeting, education and amusement in recent years, wherein the performance of screen is being played the part of pivotal player on image quality, because the relation of brightness and contrast often must reduce the brightness of screen surrounding environment and just can see clear and bright image.
Traditional screen is U.S. Patent Application Publication file U.S.2006/0103929 for example, proposes the lamination be made up of a plurality of dielectric layer, and alternately stacked by high index of refraction and low refraction coefficient reflected to reach a part of light that will have specific wavelength.Fig. 1 illustrates traditional image screen.Consult Fig. 1, screen 10 has a transparency carrier 11.Be provided with optical film 12 on the two sides of transparency carrier 11.Optical film 12 is to replace stacked institute by a plurality of high index of refraction dielectric layer 12H and low refraction coefficient dielectric layer 12L to become.Optical film 12 can be with the light reflection of some wavelength.
Also be provided with the light that light absorbing zone 14 absorbs other part that is not reflected in addition, and another side is provided with light diffusion layer 13 on one side.Image light by display produces is projected onto screen 10 from light diffusion layer 13, and optical film 12 can be with the light reflection of a part of wavelength.Last remaining light is absorbed by light absorbing zone 14.
At aforesaid traditional screen, be coated with identical symmetrical rete 12 respectively in substrate 11 both sides, the rete 12 on every limit all can reflect the wavelength of red, green, blue, but reflectivity is not high.The identical symmetrical stack membrane in both sides can be strengthened its reflectivity.Therefore because of the material of height (H, L) two kinds of refraction coefficients is dielectric material, its thickness is very big, has the not good problem of tack, and rete 12 breaks easily and can't be applied to bendable substrate.
The dealer still continues to research and develop other designs of image screen, to promote usefulness.
Summary of the invention
The invention provides a kind of image screen, comprise transparency carrier, metal film and optical reflection lamination.Metal film is on first of transparency carrier, and preset thickness is arranged.The optical reflection lamination is above metal film, and this optical reflection lamination is made up of dielectric material.Metal film and optical reflection lamination one work and optionally reflect the light of red, green, blue.After wherein light passes from second incident of this transparency carrier, in regular turn by this metal film and the reflection of this optical reflection lamination.
The present invention provides a kind of image screen again, comprises transparency carrier and optical reflection filtering lamination.Optical reflection filtering is stacked on first of this transparency carrier, and wherein optical reflection filtering lamination comprises the optical reflection lamination; And layer of metal film, on first, predetermined thickness is arranged and contacting with this optical reflection lamination, incident light passes behind this transparency carrier by this optical reflection filtering lamination reflection, and this optical reflection filtering lamination optionally reflects the light of red, green, blue.
The present invention provides a kind of image screen again, comprises transparency carrier, optical reflection filtering lamination and diffusion microstructured layers.Optical reflection filtering lamination, on first of transparency carrier, wherein optical reflection filtering lamination optionally reflects the light of red, green, blue, and wherein this optical reflection filtering lamination comprises layer of metal film, on this first of this transparency carrier and have a predetermined thickness.The diffusion microstructured layers, on second of transparency carrier, the light that is reflected by optical reflection filtering lamination is penetrated with a field of view, wherein spread horizontal width that the microstructure shape of microstructured layers makes its field of view greater than vertical width, wherein incident light is optionally reflected by the light of this optical reflection filtering lamination to red, green, blue after passing this diffusion microstructured layers and this transparency carrier.
For the present invention can be become apparent, embodiment cited below particularly, and cooperate appended diagram, be described in detail below.
Description of drawings
Fig. 1 illustrates traditional image screen.
Fig. 2 illustrates according to the embodiment of the invention, the diagrammatic cross-section of image screen.
Fig. 3 illustrates according to the embodiment of the invention, the image light synoptic diagram that is reflected by screen.
Fig. 4 illustrates according to the embodiment of the invention, when the thickness of metal film is too thin, and the image light synoptic diagram that reflects by screen.
Fig. 5 illustrates according to the embodiment of the invention, when the thickness of metal film is too thick, and the image light synoptic diagram that reflects by screen.
Fig. 6 illustrates according to the embodiment of the invention, the structure perspective diagram of image shadow curtain.
Fig. 7 illustrates according to the embodiment of the invention, the synoptic diagram of angular field of view.
Description of reference numerals
10: screen 11: transparency carrier
12: optical film 13: light diffusion layer
14: light absorbing zone 100: substrate
102: optical reflection filtering lamination 102a: metal film
102b: optical reflection lamination 102c: reflection horizon
104: incident light 106: reflected image light
108: microstructured layers 110: light outgoing zone
Embodiment
The method that generally will increase screen contrast mainly contains and comprises adopting and cover external light source or absorption portion spectrum.The present invention for example adopts the plated film mode to absorb the spectrum of external environment light to increase the image comparison of projection screen.So, clear and bright image is still being arranged under the brighter environment or under the lower projection brightness.
The present invention for example reaches the reflective stacks of Red Green Blue by boundary-layer theory redesign, and wherein the dielectric layer of at least a portion can be replaced by at least one metal film.Metal film is for also being electromagnetic light, if thickness is suitable, cooperate extinction coefficient (extinction coefficient, k) and refraction coefficient (Index of Refraction, n) selection of etc. substance characteristics constant, it still has the function of dielectric film layer.Below for some embodiment as description of the invention, but the invention is not restricted to illustrated embodiment.In addition, for embodiment also can do the combination of suitable part, and be not restricted to other embodiment.
Fig. 2 illustrates according to the embodiment of the invention, the diagrammatic cross-section of image screen.Consult Fig. 2, image screen includes transparency carrier 100.Transparency carrier 100 can be the material of flexible, plastics etc. for example, and it can not be confined to the demonstration on plane.Yet transparency carrier 100 also can be rigid material, for example glass etc.
Then optical reflection filtering lamination 102 is set on the one side of substrate 100.Optical reflection filtering lamination 102 for example includes at least one metal film 102a and optical reflection lamination 102b.Optical reflection filtering lamination 102 can also for example comprise reflection horizon 102c or light absorbing zone 102c.
Metal film 102a for example is on the one side of substrate 100, and preset thickness is arranged.Metal film 102a has the light reflection except working with optical reflection lamination 102b one, outside the function of absorption and filtering, metal film 102a also can provide the tack between substrate 100 and the optical reflection lamination 102b.Because optical reflection lamination 102b generally is to use dielectric material, its with the tack of substrate 100 a little less than, by metal film 102a enhancing tack, also so also be suitable for the substrate of deflection material.
At this, metal film 102a can increase tack between substrate 100 and optical reflection lamination 102b.Yet this mode is not unique mode.Generally speaking, optical reflection filtering lamination 102 comprises at least one metal film, but its position in rhythmo structure needn't limit.
With regard to the material of optical reflection filtering lamination 102, optical reflection lamination 102b for example comprises a plurality of dielectric laminations, has high index of refraction and low refraction coefficient, and is alternately stacked.The material of dielectric lamination for example comprises Ta
2O
5, TiO
2, Nb
2O
5, Al
2O
3, MgF
2Or SiO
2The refraction coefficient of dielectric lamination is in fact between 1.35 and 2.45.The material of metal film 102a for example comprises Ag, Al, Au, Cr, Ir, Ni, Pt, Re, Ta, Ti or W.In addition the thickness of lamination for example in fact each layer about the scope of 2.5nm～200nm.The formation method of rete for example is the evaporation mode.
The optics mechanism of metal film of the present invention is below described.Image generally is made up of the three primary colors of RGB, and its reflectivity is arranged respectively.Yet the image light that is reflected by screen can have the environmental background light signal of some degree.
The present invention for example cooperates the thickness adjustment of dielectric lamination by metal film, surround lighting effectively can be lowered.Fig. 3 illustrates according to the embodiment of the invention, the image light synoptic diagram that is reflected by screen.Consult Fig. 3, the longitudinal axis is that reflectivity R, transverse axis are optical wavelength, and this reflected image light 106 purer red, green, blue is arranged, and the bias light signal of environment can be lowered effectively, so the contrast of image can be raised.
The thickness of metal film need design at suitable thickness.If the thickness of metal film is little, then catoptrical efficiency of selection can reduce.Fig. 4 illustrates according to the embodiment of the invention, when the thickness of metal film is too thin, and the image light synoptic diagram that reflects by screen.Consult Fig. 4, though red, blue, green light can effectively be reflected, yet the bias light signal is very big, so contrast still is apparent not enough.Fig. 5 illustrates according to the embodiment of the invention, when the thickness of metal film is too thick, and the image light synoptic diagram that reflects by screen.Consult Fig. 5, anti-, when the thickness of metal film is too big, though can obtain purer red, green, blue, reflectivity can be too low, neither effectively design.In other words, behind the extinction coefficient (k) of for example considering metal membrane material and the refraction coefficient (n), adopt suitable thickness to make reflected light that preferred contrast be arranged, and the vividness of increase color.
Then, the present invention can also form a microstructured layers again on the another side of substrate 100, with the angular field of view of control outgoing.Fig. 6 illustrates according to the embodiment of the invention, the structure perspective diagram of image shadow curtain.Consult Fig. 6, the another side of substrate 100 is provided with microstructured layers 108, and it for example directly forms on the surface of substrate 100, or just is arranged on the substrate 100 after making microstructured layers 108.Microstructured layers 108 can comprise a plurality of microstructures, and the shape of design is arranged.When incident light 104 incidents, the effect of image by microstructured layers 108 has an angular field of view, and therefore the spectators before screen can watch image on the screen in different visual angles.
The effect of microstructured layers 108 of the present invention comprises that the control angular field of view makes the horizontal width in light outgoing zone 110 greater than vertical width.So design is based on considering of actual use.General beholder can be distributed on the position of par height haply, thus need bigger horizontal view angle scope, and more do not need big vertical angle of view scope.Therefore, the present invention is can be with emergent light more concentrated and then improve the light intensity that shows.
Fig. 7 illustrates according to the embodiment of the invention, the synoptic diagram of angular field of view.Consult Fig. 7, perspective definition is for seeing the angle look screen, with the visual angle of the direction of facing screen be zero degree as a reference.By the design of microstructure, the horizontal view angle of horizontal direction can be controlled at the range of scatter at for example positive and negative 30 degree visual angles, watches in order to a plurality of users.At the same time, because user's position does not have too big distribution on height, so the vertical angle of view of vertical direction can be controlled at the range of scatter at for example positive and negative 15 degree visual angles.So can comparatively concentrate light intensity.In other words, the embodiment of the invention is utilized microstructure, and the horizontal width that makes light outgoing zone 110 is greater than vertical width.
Generally speaking, according to the image screen of an embodiment, the optical reflection lamination for example can comprise a plurality of dielectric laminations, has high index of refraction and low refraction coefficient, and is alternately stacked.
According to the image screen of an embodiment, the material of dielectric lamination for example comprises Ta
2O
5, TiO
2, Nb
2O
5, Al
2O
3, MgF
2Or SiO
2Again for example, the refraction coefficient of dielectric lamination is in fact between 1.35 and 2.45.
According to the image screen of an embodiment, the parameter of considering of metal film for example comprises preset thickness, extinction coefficient (k) and refraction coefficient (n).
According to the image screen of an embodiment, for example the wavelength that is optionally reflected comprises the wavelength section of ruddiness, green glow, blue light.
According to the image screen of an embodiment, for example metal film and this optical reflection lamination one work, and a surround lighting is optionally absorbed.
According to the image screen of an embodiment, screen also for example comprises the reflection horizon, and is on one side of this optical reflection lamination, relative with this transparency carrier.
According to the image screen of an embodiment, screen for example also comprises light absorbing zone, and is on one side of this optical reflection lamination, relative with this transparency carrier.
According to the image screen of an embodiment, the material of metal film for example comprises Ag, Al, Au, Cr, Ir, Ni, Pt, Re, Ta, Ti or W.
According to the image screen of an embodiment, screen for example also comprises the diffusion microstructured layers, and is on second of this transparency carrier, relative with this metal film.
According to the image screen of an embodiment, for example make the field of view of the image light of reflection horizontal width be arranged greater than vertical width.
The present invention institute is to do appropriate combination mutually for a plurality of embodiment, to reach desired product, need not to be limited in single embodiment.
The embodiment of the invention is served as binding layer between flexible base plate and the subsequent optical stack membrane with ultrathin metallic film, increasing tack, and manifests the optical property of subsequent optical stack membrane simultaneously.
After the dielectric material stack membrane, for example also high reflecting metal film or light absorping film can be set, whole stack membranes can be coated on the same side of substrate, thereby significantly shortens the process time.
Metal film can significantly reduce the dielectric medium number of plies of screen and the stress of whole stack membrane, has increased the elasticity and the pliability of stack membrane.Also therefore, stack membrane can be sputtered at bendable substrate.
In addition, the other side of substrate can do various surface micro-structures according to different purposes and handle, with control screen visual angle.
During use, because of stack membrane is made in the back side of substrate, thus more be not subjected to ectocine, frequent clean wiping for example, and can not cause scratch or come off.
The present invention comprises above-mentioned characteristics at least, still is not limited only to the characteristics of being lifted.
Though the present invention discloses as above with embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.
Claims (18)
1. image screen comprises:
Transparency carrier;
Metal film, on first of this transparency carrier, this metal film has predetermined thickness; And
The optical reflection lamination, above this metal film, this optical reflection lamination is made up of dielectric material,
Wherein this metal film and this optical reflection lamination one work, and the light that produces red, green, blue optionally reflects,
After wherein light passes from second incident of this transparency carrier, in regular turn by this metal film and the reflection of this optical reflection lamination.
2. image screen as claimed in claim 1, wherein this optical reflection lamination comprises a plurality of dielectric laminations, has high index of refraction and low refraction coefficient, and is alternately stacked.
3. image screen as claimed in claim 2, wherein the material of these dielectric laminations comprises Ta
2O
5, TiO
2, Nb
2O
5, Al
2O
3, MgF
2Or SiO
2
4. image screen as claimed in claim 2, wherein the refraction coefficient of these dielectric laminations is between 1.35 and 2.45.
5. image screen as claimed in claim 1, wherein this metal film and this optical reflection lamination one work, and the light of a part of wavelength is optionally absorbed.
6. image screen as claimed in claim 1, wherein this metal film and this optical reflection lamination one work, to the light absorption of wavelength beyond red, green or basket.
7. image screen as claimed in claim 1 also comprises the reflection horizon, and is on one side of this optical reflection lamination, relative with this transparency carrier.
8. image screen as claimed in claim 1 also comprises light absorbing zone, and is on one side of this optical reflection lamination, relative with this transparency carrier.
9. image screen as claimed in claim 1, wherein the material of this metal film comprises Ag, Al, Au, Cr, Ir, Ni, Pt, Re, Ta, Ti or W.
10. image screen as claimed in claim 1 also comprises the diffusion microstructured layers, and is on second of this transparency carrier, relative with this metal film.
11. an image screen comprises:
Transparency carrier; And
Optical reflection filtering lamination, on first of this transparency carrier, wherein this optical reflection filtering lamination comprises the optical reflection lamination; And layer of metal film, on this first, predetermined thickness is arranged and contacting with this optical reflection lamination, incident light passes behind this transparency carrier by this optical reflection filtering lamination reflection, and this optical reflection filtering lamination optionally reflects the light of red, green, blue.
12. image screen as claimed in claim 11, wherein this optical reflection filtering lamination absorbs the light that at least a portion is not reflected.
13. image screen as claimed in claim 11, wherein this optical reflection filtering lamination also comprises stacked a plurality of dielectric layers, includes multiple refraction coefficient.
14. image screen as claimed in claim 13, wherein these refraction coefficients are between 1.35 and 2.45.
15. an image screen comprises:
Transparency carrier;
Optical reflection filtering lamination, on first of this transparency carrier, wherein this optical reflection filtering lamination optionally reflects the light of a part of wavelength, and wherein this optical reflection filtering lamination comprises layer of metal film, on this first of this transparency carrier and predetermined thickness arranged; And
The diffusion microstructured layers, on second of this transparency carrier, the light that is reflected by this optical reflection filtering lamination is penetrated with a field of view, wherein a microstructure shape of this diffusion microstructured layers make this field of view horizontal width greater than vertical width,
Wherein incident light is optionally reflected by the light of this optical reflection filtering lamination to red, green, blue after passing this diffusion microstructured layers and this transparency carrier.
16. image screen as claimed in claim 15, wherein this optical reflection filtering lamination comprises at least one metal film.
17. image screen as claimed in claim 16, wherein this optical reflection filtering lamination also comprises stacked a plurality of dielectric layers, includes multiple refraction coefficient.
18. image screen as claimed in claim 17, wherein these refraction coefficients are between 1.35 and 2.45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710196256 CN101452197B (en) | 2007-11-30 | 2007-11-30 | Image screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710196256 CN101452197B (en) | 2007-11-30 | 2007-11-30 | Image screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101452197A CN101452197A (en) | 2009-06-10 |
| CN101452197B true CN101452197B (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710196256 Expired - Fee Related CN101452197B (en) | 2007-11-30 | 2007-11-30 | Image screen |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015122055A1 (en) * | 2014-02-14 | 2015-08-20 | 大日本印刷株式会社 | Reflection screen, reflection-screen production method, screen housing, and video display system |
| CN105223766A (en) * | 2014-07-04 | 2016-01-06 | 中强光电股份有限公司 | The method for making of projection screen and projection screen |
| CN109100911A (en) * | 2018-11-05 | 2018-12-28 | 成都菲斯特科技有限公司 | Projection screen and optical projection system |
| CN109254489A (en) * | 2018-11-05 | 2019-01-22 | 成都菲斯特科技有限公司 | Projection screen and optical projection system |
| CN109031879A (en) * | 2018-11-05 | 2018-12-18 | 成都菲斯特科技有限公司 | Projection screen and optical projection system |
| CN109188849A (en) * | 2018-11-05 | 2019-01-11 | 成都菲斯特科技有限公司 | Projection screen and optical projection system |
| CN109298589A (en) * | 2018-11-05 | 2019-02-01 | 成都菲斯特科技有限公司 | Projection screen and optical projection system |
| CN109212884A (en) * | 2018-11-05 | 2019-01-15 | 成都菲斯特科技有限公司 | Projection screen and optical projection system |
| CN112558397A (en) * | 2019-09-10 | 2021-03-26 | 青岛海信激光显示股份有限公司 | Display screen |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050207007A1 (en) * | 2004-03-18 | 2005-09-22 | Kazuhito Shimoda | Screen and method for manufacturing the same |
| US20050231800A1 (en) * | 2001-12-21 | 2005-10-20 | Barret Lippey | Selective reflecting |
-
2007
- 2007-11-30 CN CN 200710196256 patent/CN101452197B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050231800A1 (en) * | 2001-12-21 | 2005-10-20 | Barret Lippey | Selective reflecting |
| US20050207007A1 (en) * | 2004-03-18 | 2005-09-22 | Kazuhito Shimoda | Screen and method for manufacturing the same |
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| Publication number | Publication date |
|---|---|
| CN101452197A (en) | 2009-06-10 |
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