CN114442417A - Curtain - Google Patents
Curtain Download PDFInfo
- Publication number
- CN114442417A CN114442417A CN202111634869.8A CN202111634869A CN114442417A CN 114442417 A CN114442417 A CN 114442417A CN 202111634869 A CN202111634869 A CN 202111634869A CN 114442417 A CN114442417 A CN 114442417A
- Authority
- CN
- China
- Prior art keywords
- light
- curtain
- particles
- reflecting
- reflective layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002245 particle Substances 0.000 claims abstract description 105
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 239000011358 absorbing material Substances 0.000 claims description 26
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 10
- 229910052709 silver Inorganic materials 0.000 claims description 10
- 239000004332 silver Substances 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 4
- 229920002125 Sokalan® Polymers 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 239000004584 polyacrylic acid Substances 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 229920005749 polyurethane resin Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 23
- 239000000463 material Substances 0.000 abstract description 8
- 230000031700 light absorption Effects 0.000 abstract description 6
- 230000001795 light effect Effects 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000002270 dispersing agent Substances 0.000 description 5
- 239000004088 foaming agent Substances 0.000 description 5
- 239000000080 wetting agent Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 210000001525 retina Anatomy 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
Abstract
The embodiment of the invention discloses a curtain, which comprises a curtain main body and a reflecting layer arranged on the curtain main body, wherein the reflecting layer comprises a light absorption material for absorbing ambient light, light reflection particles for reflecting projection light and an adhesive, the light reflection particles are arranged on one surface of the reflecting layer, which is far away from the curtain main body, the particle size of the light reflection particles is 1-10 mu m, and the gap between every two adjacent light reflection particles is 300-3 mu m. With the curtain, the light reflection particles are arranged on the surface of the reflection layer far away from the curtain main body, the particle diameter of the light reflection particles is 1-10 μm, and the gap between two adjacent light reflection particles is 300-3 μm. Because the light absorption material can absorb the ambient light and play the role of light resistance, and the light reflection particles can reflect the projection light, the curtain has better light resistance effect. Adopt black curtain usually to make for traditional curtain, the not good scheme of anti light effect, the anti light effect preferred of curtain in this scheme.
Description
Technical Field
The invention relates to the technical field of projection, in particular to a curtain.
Background
With the development of modern technology, projection technology is also continuously developed, from middle and long focus projection to short focus projection to ultra-short focus projection, the technical requirements of projectors are continuously improved, and the requirements on projection screens are higher and higher. For a front projection screen, the image on the screen that we see at ordinary times is the image formed by the light reflected to the retina in our eyes. The light projected by the projector is also energy, namely light energy. In the diffuse reflection projection screen which is usually seen at ordinary times, light projected on the screen can be diffusely reflected 180 degrees towards the space, and part of the light scattered in the environment can be reflected back to the screen and is superposed with a picture on the original screen, so that the contrast of the picture is reduced slightly, and the original color of the picture is changed greatly. The anti-light curtain can improve the picture effect of projection under light interference, and can be used in the environment of drawing the curtain in the daytime and turning on the lamp at night, so that people can tell a 'black room'.
The traditional curtain is usually made of black curtain material, and the light-resistant effect is poor.
Disclosure of Invention
The invention aims to provide a curtain with a better light-resistant effect.
In order to solve the above problems, the present invention provides a curtain comprising a curtain main body and a reflective layer disposed on the curtain main body, wherein the reflective layer comprises a light absorbing material for absorbing ambient light, light reflective particles for reflecting projection light, and an adhesive;
the light reflection particles are arranged on one surface, far away from the curtain main body, of the reflection layer, the particle size of each light reflection particle is 1-10 mu m, and the gap between every two adjacent light reflection particles is 300-3 mu m.
The embodiment of the invention has the following beneficial effects:
the curtain comprises a curtain main body and a reflecting layer arranged on the curtain main body, wherein the reflecting layer comprises a light absorption material for absorbing ambient light, light reflection particles for reflecting projection light and an adhesive, the light reflection particles are arranged on one surface, far away from the curtain main body, of the reflecting layer, the particle diameter of each light reflection particle is 1-10 mu m, and the gap between every two adjacent light reflection particles is 300-3 mu m. Because the light absorption material can absorb the ambient light and play the role of light resistance, and the light reflection particles can reflect the projection light, the curtain has better light resistance effect. Adopt black curtain usually to make for traditional curtain, the not good scheme of anti light effect, the anti light effect preferred of curtain in this scheme.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
fig. 1 is a cross-sectional view of a curtain according to an embodiment of the invention.
FIG. 2 is a schematic plan view of the curtain shown in FIG. 1 according to one embodiment.
FIG. 3 is a microscope view of the curtain shown in FIG. 1 according to one embodiment.
Reference numerals:
10-a curtain body;
20-reflective layer, 21-light absorbing material, 23-light reflecting particles, 25-bubbles.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 and 2, the present invention discloses an embodiment of a curtain, which includes a curtain main body 10 and a reflective layer 20 disposed on the curtain main body 10, wherein the reflective layer 20 includes a light absorbing material 21 for absorbing ambient light, light reflective particles 23 for reflecting projection light, and a binder.
The reflecting layer 20 is provided with light reflecting particles 23 on one surface far away from the curtain main body 10, the particle diameter of the light reflecting particles 23 is 1-10 μm, and the gap between two adjacent light reflecting particles 23 is 300-3 μm.
The curtain comprises a curtain main body 10 and a reflecting layer 20 arranged on the curtain main body 10, wherein the reflecting layer 20 comprises a light absorbing material 21 for absorbing ambient light, light reflecting particles 23 for reflecting projection light and an adhesive, the light reflecting particles 23 are arranged on one surface of the reflecting layer 20 far away from the curtain main body 10, the particle diameter of each light reflecting particle 23 is 1-10 mu m, and the gap between every two adjacent light reflecting particles 23 is 300-3 mu m. Since the light absorbing material 21 can absorb the ambient light and play a role of light resistance, and the light reflective particles 23 can reflect the projection light, the light resistance of the curtain is better. Adopt black curtain usually to make for traditional curtain, the not good scheme of anti light effect, the anti light effect preferred of curtain in this scheme.
As shown in fig. 1, the light reflective particles 23 are regularly arranged, but in this embodiment, the light reflective particles 23 may be irregularly arranged.
Preferably, the light reflective particles have a particle size of 3 to 7 μm, and a gap between two adjacent light reflective particles is 500nm to 1 μm.
In the present embodiment, the light absorbing material 21 is light absorbing particles having a particle size of 5nm to 1000nm, and the light absorbing particles are further provided on the surface of the reflective layer 20 away from the curtain main body 10, and are provided in the gaps of the light reflecting particles 23.
Specifically, the light absorbing material 21 is light absorbing particles with a particle size of 5nm to 1000nm, and the light absorbing particles are further disposed on a surface of the reflective layer 20 away from the curtain main body 10, and disposed in gaps of the light reflecting particles 23, so that the light absorbing particles can absorb ambient light and play a role in light resistance. If the particle size of the light absorption particles is too small, the effect of absorbing the ambient light is not good, and the light resistance effect cannot be achieved, and if the particle size of the light absorption particles is too large, the projection light is easily absorbed, so that the projection light reflected to human eyes is reduced, and the visual effect of a viewer is poor.
In the present embodiment, the light absorbing material 21 is carbon black particles or inorganic metal oxide particles.
Specifically, the light absorbing material 21 is carbon black particles or inorganic metal oxide particles, and the carbon black particles and the inorganic metal oxide particles have a good light absorbing effect, and can absorb ambient light to play a role in light resistance.
In other embodiments, the light absorbing material 21 is a black organic dye.
Specifically, the light absorbing material 21 is a black organic dye, and the black organic dye has a good light absorbing effect, can absorb ambient light, and plays a role in light resistance.
Preferably, the mass ratio of the light absorbing material 21, the light reflecting particles 23 and the binder is 1: 2-30: 4 to 40.
Specifically, the mass ratio of the light absorbing material 21, the light reflecting particles 23, and the binder is 1: 2-30: 4-40, the content of the light absorbing material 21 is less than the content of the light reflective particles 23, so that the light absorbing material 21 absorbs ambient light to play a role of light resistance, and the light reflective particles 23 can reflect the projection light, thereby making the curtain have a better light resistance effect.
Preferably, the light reflective particles 23 are polystyrene particles, polyacrylic acid particles, or silicone particles.
Specifically, the light-reflecting particles 23 are polystyrene particles, polyacrylic acid particles, or silicone particles, and the polystyrene particles, the polyacrylic acid particles, and the silicone particles have a good light-reflecting effect and can better reflect the projection light.
Preferably, the thickness of the reflective layer 20 is 10 μm to 100 μm.
Specifically, the thickness of the reflective layer 20 is 10 μm to 100 μm, and if the thickness of the reflective layer 20 is too small, the effect of the adhesive for bonding the light absorbing material 21 and the light reflective particles 23 is not good, the light absorbing material 21 and the light reflective particles 23 are easily detached from the adhesive, and if the thickness of the reflective layer 20 is too large, the material is wasted, which is not economical.
Preferably, the reflective layer 20 further includes a silver paste for reflecting the projection light, and the particle size of the particles in the silver paste is 3 μm to 20 μm.
Specifically, the reflective layer 20 further includes a silver paste for reflecting the projection light, the particle size of the particles in the silver paste is 3 μm to 20 μm, the silver paste has the effect of improving the reflectivity, the effect of reflecting the projection light can be enhanced, the phenomenon that a large amount of projection light is absorbed while the ambient light is absorbed, and the gain is reduced due to the fact that the silver paste is filled to ensure the brightness coefficient of the curtain, namely, the gain. If the particle size of the particles in the silver paste is too small, the effect of reflecting the projection light is not good, and if the particle size of the particles in the silver paste is too large, the ambient light is easily reflected to the eyes of a viewer, so that the light-resistant effect cannot be achieved.
Preferably, the binder is an acrylic resin, a urethane resin or a modified resin.
Specifically, the adhesive is an acrylic resin, a urethane resin, or a modified resin, and the acrylic resin, the urethane resin, or the modified resin has a good adhesive effect, and can firmly adhere the light absorbing material 21 and the light reflecting particles 23, and prevent the light absorbing material 21 and the light reflecting particles 23 from falling off.
Preferably, the thickness of the adhesive is 5 μm to 100. mu.m.
Specifically, the thickness of the adhesive is 5 μm to 100 μm, and if the thickness of the adhesive is too small, the effect of adhesion is not good, and the light absorbing material 21 and the light reflecting particles 23 cannot be prevented from falling off, and if the thickness of the adhesive is too large, the material is wasted, which is uneconomical.
Preferably, the reflective layer 20 further comprises a foaming agent, and the foaming agent accounts for 1% -5%.
Specifically, the reflective layer 20 further includes a foaming agent, the foaming agent is 1% to 5%, the foaming agent is capable of foaming, bubbles 25 are generated on the surface (as shown in fig. 3) and inside the reflective layer 20, the bubbles 25 are irregularly arranged in a spherical shape, an ellipsoidal shape, etc., and gas having a refractive index of about 1 is contained in the bubbles 25, and since the bubbles 25 and the surrounding adhesive have a refractive index difference, multiple refractive reflections are formed, thereby enhancing the reflection effect of the projection light.
Preferably, the reflective layer 20 further includes a wetting agent, a leveling agent and a dispersing agent, and the total ratio of the wetting agent, the leveling agent and the dispersing agent is 1% to 5%.
Specifically, the reflective layer 20 further includes a wetting agent, a leveling agent and a dispersing agent, the total ratio of the wetting agent, the leveling agent and the dispersing agent is 1% to 5%, the wetting agent can improve the adhesion of the reflective layer 20, so that the reflective layer 20 is not easy to fall off from the curtain main body 10, the leveling agent can improve the leveling effect of the reflective layer 20 on the curtain main body 10, and the dispersing agent can make the light absorbing material 21 and the light reflecting particles 23 uniformly distributed on the adhesive.
With the development of modern technology, projection technology is also continuously developed, from middle and long focus projection to short focus projection to ultra-short focus projection, the technical requirements of projectors are continuously improved, and the requirements on projection screens are higher and higher. For a front projection screen, the image on the screen that we see at ordinary times is the image formed by the light reflected to the retina in our eyes. The light projected by the projector is also energy, namely light energy. In the diffuse reflection projection screen which is usually seen at ordinary times, light projected on the screen can be diffusely reflected 180 degrees towards the space, and part of the light scattered in the environment can be reflected back to the screen and is superposed with a picture on the original screen, so that the contrast of the picture is reduced slightly, and the original color of the picture is changed greatly. The anti-light curtain can improve the picture effect of projection under light interference, and can be used in the environment of drawing the curtain in the daytime and turning on the lamp at night, so that people can tell a 'black room'.
The light-resistant curtain is characterized in that: by resisting light, filtering and absorbing ambient light, the effects of enhancing the contrast, the light and shade level, the color brightness, the hue, the saturation and the like of the picture are achieved.
For a front projection screen, the image on the screen that we see at ordinary times is the image formed by the light reflected to the retina in our eyes. The light projected by the projector is also energy, namely light energy. In the diffuse reflection projection screen which is usually seen in normal times, light projected on the projection screen can be diffusely reflected towards 180 degrees in space. Some of the light scattered to the environment is reflected back to the screen and is superposed with the picture on the original screen, so that the contrast of the picture is reduced if the light is light, and the original color of the picture is changed if the light is heavy. The light-resistant curtain realizes light resistance through the optical coating and the physical structure, can absorb ambient light around, and can control incident light of the projector to reflect to a visual angle area where human eyes are positioned, so that projection light scattered into a space is reduced as much as possible. At present, the quality effect of the light-resistant screen on the market is 'good and uneven', the price is very different, some 'long-focus light-resistant screens' with low price are actually made of black screen materials, the color difference with the real light-resistant screen is very large, the effect is not as good as that of a white wall when the lamp is turned off for watching at night.
The invention provides a curtain, which can improve the light resistance of the curtain on the basis of ensuring the gain of the curtain.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A curtain comprising a curtain body and a reflective layer disposed on the curtain body, the reflective layer comprising a light absorbing material for absorbing ambient light, light reflecting particles for reflecting projected light, and an adhesive;
the light reflection particles are arranged on one surface, far away from the curtain main body, of the reflection layer, the particle size of each light reflection particle is 1-10 mu m, and the gap between every two adjacent light reflection particles is 300-3 mu m.
2. The curtain as recited in claim 1, wherein the light absorbing material is light absorbing particles having a particle size of 5nm to 1000nm, the light absorbing particles are further disposed on a surface of the reflective layer away from the curtain body, and the light absorbing particles are disposed in gaps between the light reflecting particles.
3. The curtain as recited in claim 2, wherein the light absorbing material is carbon black particles or inorganic metal oxide particles.
4. The curtain of claim 1, wherein the light absorbing material is a black organic dye.
5. The curtain as claimed in any one of claims 1 to 4, wherein the light absorbing material, the light reflecting particles and the binder are present in a mass ratio of 1: 2-30: 4 to 40.
6. The curtain of claim 5, wherein the light reflective particles are polystyrene particles, polyacrylic acid particles, or silicone particles.
7. The curtain of claim 5, wherein the reflective layer has a thickness of 10 μm to 100 μm.
8. The curtain of claim 5, wherein the reflective layer further comprises a silver paste for reflecting the projection light, and particles in the silver paste have a particle size of 3 μm to 20 μm.
9. The curtain of claim 5, wherein the binder is an acrylic resin, a polyurethane resin, or a modified resin.
10. The curtain of claim 9, wherein the adhesive has a thickness of 5 μ ι η to 100 μ ι η.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111634869.8A CN114442417A (en) | 2021-12-29 | 2021-12-29 | Curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111634869.8A CN114442417A (en) | 2021-12-29 | 2021-12-29 | Curtain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114442417A true CN114442417A (en) | 2022-05-06 |
Family
ID=81366563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111634869.8A Pending CN114442417A (en) | 2021-12-29 | 2021-12-29 | Curtain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114442417A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002139A (en) * | 2004-08-10 | 2007-07-18 | 木本股份有限公司 | Transmission screen |
| CN101809497A (en) * | 2007-03-30 | 2010-08-18 | Lg电子株式会社 | Reflective screen and manufacturing method thereof |
| CN102033405A (en) * | 2009-09-28 | 2011-04-27 | 李彦明 | High-contrast screen |
| CN104749870A (en) * | 2013-12-25 | 2015-07-01 | 常州亚玛顿股份有限公司 | Double-side projection screen and double-side projection display system comprising double-side projection screen |
| CN108693693A (en) * | 2018-07-27 | 2018-10-23 | 江苏坦能纳米材料科技有限公司 | A kind of high contrast transparent projection shows screen and preparation method thereof |
| CN109073794A (en) * | 2016-12-28 | 2018-12-21 | 日华化学株式会社 | Optical diffusion film, optical diffusion film are formed with smears and its manufacturing method and projection screen and its manufacturing method |
| CN112305648A (en) * | 2020-11-09 | 2021-02-02 | 合肥乐凯科技产业有限公司 | High-brightness high-fog light-homogenizing film |
-
2021
- 2021-12-29 CN CN202111634869.8A patent/CN114442417A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002139A (en) * | 2004-08-10 | 2007-07-18 | 木本股份有限公司 | Transmission screen |
| CN101809497A (en) * | 2007-03-30 | 2010-08-18 | Lg电子株式会社 | Reflective screen and manufacturing method thereof |
| CN102033405A (en) * | 2009-09-28 | 2011-04-27 | 李彦明 | High-contrast screen |
| CN104749870A (en) * | 2013-12-25 | 2015-07-01 | 常州亚玛顿股份有限公司 | Double-side projection screen and double-side projection display system comprising double-side projection screen |
| CN109073794A (en) * | 2016-12-28 | 2018-12-21 | 日华化学株式会社 | Optical diffusion film, optical diffusion film are formed with smears and its manufacturing method and projection screen and its manufacturing method |
| CN108693693A (en) * | 2018-07-27 | 2018-10-23 | 江苏坦能纳米材料科技有限公司 | A kind of high contrast transparent projection shows screen and preparation method thereof |
| CN112305648A (en) * | 2020-11-09 | 2021-02-02 | 合肥乐凯科技产业有限公司 | High-brightness high-fog light-homogenizing film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI385467B (en) | Optical projection screen | |
| CN104062839B (en) | A kind of optical projection system with forward projection's optical screen | |
| JP2002540445A (en) | Reflection projection screen and projection system | |
| US8115997B1 (en) | Projection screen | |
| CN207867207U (en) | High contrast projection screen | |
| JP6167315B2 (en) | Screen and video display system | |
| JP2007241263A (en) | Reflection screen | |
| CN112015040B (en) | Projection screen | |
| JP2005208557A (en) | Reflex-type screen | |
| TWM577512U (en) | Short-focus front projection ambient light resist screen | |
| CN114442417A (en) | Curtain | |
| JP2012073363A (en) | Reflection screen, reflection screen device, and video display system | |
| JP2002006403A (en) | Translucent screen | |
| JP2949844B2 (en) | Reflective projection screen | |
| CN109557760A (en) | A kind of off-axis short focus orthographic projection optical screen and optical projection system | |
| CN209132582U (en) | Ultrashort out-of-focus projection's curtain | |
| CN112255877A (en) | Reflective lateral projection screen and projection system | |
| CN207457694U (en) | high-definition back projection film | |
| JP2008032777A (en) | Light control sheet | |
| CN220085230U (en) | Front projection screen capable of double-sided projection | |
| JPH075571A (en) | Projecting screen of reflection type | |
| JP2002277966A (en) | Front plate used for back projection type screen, lenticular lens sheet with front plate, and back projection type screen | |
| CN109445241A (en) | A kind of off-axis short focus optical projection screen and optical projection system | |
| CN215006240U (en) | Optical projection film | |
| CN211577653U (en) | Ultra-short-focus hard curtain |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |